Datestamp update.

Makefile.am

@@ -95,6 +95,7 @@ tests/Modifiers_-_--line-mode.test \
 tests/Modifiers_-_--size_from_file_size.test \
 tests/Modifiers_-_--size.test \
 tests/Modifiers_-_--sync.test \
+tests/Sparse_-_Basic.test \
 tests/Terminal_-_Detect_width.test \
 tests/Transfer_-_--rate-limit.test \
 tests/Transfer_-_--remote.test \

README.md

@@ -1,10 +1,16 @@
 # Introduction
 
-This is the README for **pv** ("Pipe Viewer"), a terminal-based tool for
+**pv** ("Pipe Viewer") is a terminal-based tool for monitoring the progress
-monitoring the progress of data through a pipeline.  It can be inserted into
+of data through a pipeline and modifying its flow.
-any normal pipeline between two processes to give a visual indication of how
+
-quickly data is passing through, how long it has taken, how near to
+It can be inserted into any normal pipeline between two processes to give a
-completion it is, and an estimate of how long it will be until completion.
+visual indication of how quickly data is passing through, how long it has
+taken, how near to completion it is, and an estimate of how long it will be
+until completion.  Data flow rate, error handling strategy, buffer size, and
+cache interaction can all be adjusted.
+
+In "**\--watchfd**" mode, **pv** will inspect another process and show its
+progress through the files it has open.
 
 
 # Documentation

configure.ac

@@ -4,7 +4,7 @@ dnl Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023-2025 Andrew Wood
 dnl
 dnl License GPLv3+: GNU GPL version 3 or later; see `docs/COPYING'.
 
-AC_INIT([pv], [1.9.42], [https://codeberg.org/ivarch/pv/issues], [pv], [https://ivarch.com/p/pv])
+AC_INIT([pv], [1.9.44], [https://codeberg.org/ivarch/pv/issues], [pv], [https://ivarch.com/p/pv])
 AC_CONFIG_SRCDIR([src/include/config.h.in])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_HEADERS([src/include/config.h])

docs/ACKNOWLEDGEMENTS.md

@@ -108,6 +108,8 @@ is acknowledged and greatly appreciated:
  * [Alexander Petrossian](https://github.com/neopaf) - suggested using Unicode output for a more granular progress bar, and provided the codepoints to use ([#15](https://codeberg.org/ivarch/pv/issues/15))
  * [jmealo](https://codeberg.org/jmealo) - suggested JSON progress output ([#127](https://codeberg.org/ivarch/pv/issues/127))
  * [ipaqmaster](https://codeberg.org/ipaqmaster) - investigated 100%-CPU utilisation bug when piping to a command that has exited ([#164](https://codeberg.org/ivarch/pv/issues/164))
+ * Andriy Galetski, and also [thinrope](https://codeberg.org/thinrope) - suggested the "**--sparse**" option ([#45](https://codeberg.org/ivarch/pv/issues/45))
+ * [KimHansen](https://codeberg.org/KimHansen) - suggested that "**--watchfd**" should keep its display when the process ends ([#81](https://codeberg.org/ivarch/pv/issues/81))
 
 Translations provided through [Codeberg Weblate](https://translate.codeberg.org/projects/pv/):
 

docs/NEWS.md

@@ -1,3 +1,8 @@
+### 1.9.44 - 18 October 2025
+
+ * *feature:* new **--sparse** option to write sparse output ([#45](https://codeberg.org/ivarch/pv/issues/45))
+ * *fix:* don't clear the **--watchfd** display when the watched process ends ([#81](https://codeberg.org/ivarch/pv/issues/81))
+
 ### 1.9.42 - 11 October 2025
 
  * *feature:* permit multiple arguments to **--watchfd** ([#12](https://codeberg.org/ivarch/pv/issues/12))

docs/pv.1

@@ -1,7 +1,7 @@
-.TH PV 1 2025-10-11 pv-1.9.42 "User Commands"
+.TH PV 1 2025-10-18 pv-1.9.44 "User Commands"
 .\"
 .SH NAME
-pv \- monitor the progress of data through a pipe
+pv \- monitor and manage the progress of data through a pipe
 .\"
 .SH SYNOPSIS
 .B pv
@@ -16,11 +16,15 @@ pv \- monitor the progress of data through a pipe
 Show the progress of data through a pipeline by giving information such as
 time elapsed, percentage completed (with progress bar), current throughput
 rate, total data transferred, and ETA.
+The data flow rate, error handling strategy, buffer size, and cache
+interaction can all be adjusted.
 .PP
 Each \fIFILE\fR is copied to standard output.
 With no \fIFILE\fR, or when \fIFILE\fR is \*(lq-\*(rq, standard input is
 read.
-This is the same behaviour as \fBcat\fR(1).
+.PP
+In \*(lq\fB\-\-watchfd\fR\*(rq mode, inspect another process and show its
+progress through the files it has open.
 .\"
 .SH OPTIONS
 .\"
@@ -273,9 +277,9 @@ from or to a pipe than regular \fBread\fR(2) and \fBwrite\fR(2), but means
 that the transfer buffer may not be used.
 This prevents \*(lq\fB\-\-buffer\-percent\fR\*(rq and
 \*(lq\fB\-\-last\-written\fR\*(rq from working, cannot work with
-\*(lq\fB\-\-discard\fR\*(rq, and makes \*(lq\fB\-\-buffer\-size\fR\*(rq
+\*(lq\fB\-\-sparse\fR\*(rq or \*(lq\fB\-\-discard\fR\*(rq, and makes
-redundant, so using any of those options automatically switches on
+\*(lq\fB\-\-buffer\-size\fR\*(rq redundant, so using any of those options
-\*(lq\fB\-\-no\-splice\fR\*(rq.
+automatically switches on \*(lq\fB\-\-no\-splice\fR\*(rq.
 Switching on this option results in a small loss of transfer efficiency.
 It has no effect on systems where \fBsplice\fR(2) is unavailable.
 .TP
@@ -325,6 +329,13 @@ failures with an error of \*(lqInvalid argument\*(rq, especially if reading
 and writing files across a variety of filesystems in a single \fBpv\fR call.
 Use this option with caution.
 .TP
+.B \-O, \-\-sparse
+When writing null bytes, try to seek, producing a sparse output file.
+Implies \*(lq\fB\-\-no\-splice\fR\*(rq.
+On filesystems without sparse file support, or when the output is not
+seekable, this option will have no effect other than to turn on
+\*(lq\fB\-\-no\-splice\fR\*(rq.
+.TP
 .B \-X, \-\-discard
 Instead of transferring input data to standard output, discard it.
 This is equivalent to redirecting standard output to \fI/dev/null\fR,
@@ -793,6 +804,13 @@ Numbers passed to \*(lq\fB\-\-last\-written\fR\*(rq,
 \*(lq\fB\-\-width\fR\*(rq, \*(lq\fB\-\-height\fR\*(rq,
 \*(lq\fB\-\-average\-rate\-window\fR\*(rq, and \*(lq\fB\-\-remote\fR\*(rq
 must be integers with no suffix.
+.PP
+When \*(lq\fB\-\-sparse\fR\*(rq is in effect and output is being written to
+a file, that file may look like it has stopped growing if inspected with
+\fBls\fR(1) while null bytes are being written, even though \fBpv\fR still
+reports progress.
+This is because of the way sparse output is achieved, and the file will be
+the correct size when the transfer ends.
 .\"
 .SH REPORTING BUGS
 Please report bugs or feature requests via the issue tracker linked from the

docs/pv.1.md

@@ -1,6 +1,6 @@
 # NAME
 
-pv - monitor the progress of data through a pipe
+pv - monitor and manage the progress of data through a pipe
 
 # SYNOPSIS
 
@@ -15,11 +15,15 @@ pv - monitor the progress of data through a pipe
 
 Show the progress of data through a pipeline by giving information such
 as time elapsed, percentage completed (with progress bar), current
-throughput rate, total data transferred, and ETA.
+throughput rate, total data transferred, and ETA. The data flow rate,
+error handling strategy, buffer size, and cache interaction can all be
+adjusted.
 
 Each *FILE* is copied to standard output. With no *FILE*, or when *FILE*
-is "-", standard input is read. This is the same behaviour as
+is "-", standard input is read.
-**cat**(1).
+
+In "**\--watchfd**" mode, inspect another process and show its progress
+through the files it has open.
 
 # OPTIONS
 
@@ -281,11 +285,11 @@ are explicitly switched on will be shown.
     data from or to a pipe than regular **read**(2) and **write**(2),
     but means that the transfer buffer may not be used. This prevents
     "**\--buffer-percent**" and "**\--last-written**" from working,
-    cannot work with "**\--discard**", and makes "**\--buffer-size**"
+    cannot work with "**\--sparse**" or "**\--discard**", and makes
-    redundant, so using any of those options automatically switches on
+    "**\--buffer-size**" redundant, so using any of those options
-    "**\--no-splice**". Switching on this option results in a small loss
+    automatically switches on "**\--no-splice**". Switching on this
-    of transfer efficiency. It has no effect on systems where
+    option results in a small loss of transfer efficiency. It has no
-    **splice**(2) is unavailable.
+    effect on systems where **splice**(2) is unavailable.
 
 **-E, \--skip-errors**
 
@@ -336,6 +340,13 @@ are explicitly switched on will be shown.
     especially if reading and writing files across a variety of
     filesystems in a single **pv** call. Use this option with caution.
 
+**-O, \--sparse**
+
+:   When writing null bytes, try to seek, producing a sparse output
+    file. Implies "**\--no-splice**". On filesystems without sparse file
+    support, or when the output is not seekable, this option will have
+    no effect other than to turn on "**\--no-splice**".
+
 **-X, \--discard**
 
 :   Instead of transferring input data to standard output, discard it.
@@ -753,6 +764,12 @@ Numbers passed to "**\--last-written**", "**\--width**",
 "**\--height**", "**\--average-rate-window**", and "**\--remote**" must
 be integers with no suffix.
 
+When "**\--sparse**" is in effect and output is being written to a file,
+that file may look like it has stopped growing if inspected with
+**ls**(1) while null bytes are being written, even though **pv** still
+reports progress. This is because of the way sparse output is achieved,
+and the file will be the correct size when the transfer ends.
+
 # REPORTING BUGS
 
 Please report bugs or feature requests via the issue tracker linked from

docs/test-on-vm-lab.sh

@@ -140,7 +140,7 @@ if test "$1" = "--testRunner"; then
 	exit 1
 fi
 
-labHosts="$(cat ~/.config/lab-hosts 2>/dev/null)"
+labHosts="$(grep -v '^#' ~/.config/lab-hosts 2>/dev/null)"
 
 workDir=$(mktemp -d) || exit 1
 trap 'rm -rf "${workDir}"' EXIT

po/cs.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: 2024-10-13 20:43+0000\n"
 "Last-Translator: mmatous <mmatous@users.noreply.translate.codeberg.org>\n"
 "Language-Team: Czech <https://translate.codeberg.org/projects/pv/pv/cs/>\n"
@@ -168,8 +168,8 @@ msgstr "vypisuj výstup i pokud standardní chybový výstup není terminál"
 msgid "use cursor positioning escape sequences"
 msgstr "pozicuj kurzor pomocí řídících znaků"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr "SOUBOR"
 
@@ -218,61 +218,65 @@ msgid "use direct I/O to bypass cache"
 msgstr "použij přímý V/V k obejítí cache"
 
 #: src/main/help.c:355
+msgid "try to seek instead of writing null bytes"
+msgstr ""
+
+#: src/main/help.c:358
 msgid "discard input instead of writing to output"
 msgstr "zahoď vstup namísto zápisu na výstup"
 
-#: src/main/help.c:358
+#: src/main/help.c:361
 msgid "write all input to FILE before writing to output"
 msgstr "zapiš veškerý vstup do SOUBORu před výpisem na výstup"
 
-#: src/main/help.c:360
+#: src/main/help.c:363
-msgid "PID[:FD]"
+msgid "PID[:FD]|=NAME|@LISTFILE"
-msgstr "PID[:DS]"
+msgstr ""
 
-#: src/main/help.c:361
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "sleduj soubor DS otevřený procesem PID"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr "PID"
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "aktualizuj nastavení procesu PID"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "ulož id procesu do SOUBORu"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "ukaž pomoc a skonči"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "ukaž informace o verzi a skonči"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr "zapiš ladící záznamy do SOUBORu"
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Použití: %s [VOLBY] [SOUBOR]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 "Spoj SOUBOR(y) nebo standardní vstup na standardního výstup, s monitoringem."
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr ""
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "Prosím, hlašte veškeré chyby na: %s"
@@ -289,11 +293,11 @@ msgstr "selhala alokace stavu"
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "očekáváno ID procesu nebo dvojice PID:DS"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "neplatné ID procesu"
 
@@ -321,45 +325,45 @@ msgstr "selhalo otevření blokového zařízení"
 msgid "failed to determine size of block device"
 msgstr "selhalo zjištění velikosti blokového zařízení"
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "selhala alokace struktury pro volby"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "selhala alokace struktury pro argv"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "očekáván celočíselný argument"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "očekáván číselný argument"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Zkuste `%s --help' pro více informací."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Zkuste `%s --h' pro více informací."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -367,19 +371,19 @@ msgstr ""
 "při sledování deskriptorů souborů nelze použít řádkový mód nebo volby pro "
 "modifikaci přenosu"
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr "při sledování deskriptorů souborů nelze pozicování kurzoru použít"
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr "při sledování deskriptorů souborů nelze použít vzdálené ovládání"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr "při sledování deskriptorů souborů nelze použít přenos souborů"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "není dostupné na systémech bez /proc/self/fdinfo"
 
@@ -431,7 +435,7 @@ msgstr "yzafpnum kMGTPEZY"
 msgid "yzafpnum KMGTPEZY"
 msgstr "yzafpnum KMGTPEZY"
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "selhala alokace vyrovnávací paměti"
 
@@ -502,7 +506,7 @@ msgstr "rychlost min/avg/max/std"
 msgid "rate not measured"
 msgstr "rychlost neměřena"
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -510,7 +514,7 @@ msgstr "rychlost neměřena"
 msgid "pid"
 msgstr "pid"
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -520,21 +524,17 @@ msgstr "ds"
 msgid "history structure allocation failed"
 msgstr "selhala alokace struktury historie"
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr "selhala alokace seznamu souborů"
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "process list allocation failed"
-msgstr "selhala alokace seznamu souborů"
+msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "file descriptor list allocation failed"
-msgstr "selhala alokace seznamu souborů"
+msgstr ""
 
 #: src/pv/transfer.c:490
 msgid "read failed"
@@ -556,30 +556,33 @@ msgstr "selhal skok za chybu"
 msgid "skipped past read error"
 msgstr "chyba přeskočena"
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr "vyrovnávací paměť není alokována"
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr "selhalo nastavení intervalového časovače"
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr "selhalo vynulování intervalového časovače"
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr "selhala alokace vyrovnávací paměti pro pozici v řádcích"
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "zápis selhal"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "selhalo volání select"
 
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:203
 msgid "not a regular file or block device"
 msgstr "není obyčejný soubor nebo blokové zařízení"
+
+#~ msgid "PID[:FD]"
+#~ msgstr "PID[:DS]"

po/de.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: 2025-01-14 20:39+0000\n"
 "Last-Translator: Benny <benny@users.noreply.translate.codeberg.org>\n"
 "Language-Team: German <https://translate.codeberg.org/projects/pv/pv/de/>\n"
@@ -185,8 +185,8 @@ msgstr ""
 msgid "use cursor positioning escape sequences"
 msgstr "benutze Escape-Sequenzen zur Cursor-Positionierung"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr "DATEI"
 
@@ -235,62 +235,66 @@ msgid "use direct I/O to bypass cache"
 msgstr "verwende direkte E/A, um den Cache zu umgehen"
 
 #: src/main/help.c:355
+msgid "try to seek instead of writing null bytes"
+msgstr ""
+
+#: src/main/help.c:358
 msgid "discard input instead of writing to output"
 msgstr "verwirf die Eingabe anstatt in die Ausgabe zu schreiben"
 
-#: src/main/help.c:358
+#: src/main/help.c:361
 msgid "write all input to FILE before writing to output"
 msgstr "Ausgabe nach FILE schrieben bevor sie ausgegeben wird"
 
-#: src/main/help.c:360
+#: src/main/help.c:363
-msgid "PID[:FD]"
+msgid "PID[:FD]|=NAME|@LISTFILE"
-msgstr "PID[:FD]"
+msgstr ""
 
-#: src/main/help.c:361
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "die vom Prozess PID geöffnete Datei FD beobachten"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr "PID"
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "Einstellungen der Prozess-PID updaten"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "Prozess-ID in DATEI speichern"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "zeige diese Hilfe und beende"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "zeige Versionsinformationen und beende"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr "schreibe Debug-Protokolle in DATEI"
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Aufruf: %s [OPTION] [DATEI]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 "Verbindet DATEI(en) oder den Standard-Eingabe-Kanal mit dem Standard-Ausgabe-"
 "Kanal und misst den Datenstrom."
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr "unterstützte Formate:"
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "Bitte senden Sie Fehlerberichte an %s"
@@ -307,11 +311,11 @@ msgstr "Speicherzuweisung für `state' fehlgeschlagen"
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "Prozess-ID oder PID:FD-Paar erwartet"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "ungültige Prozess-ID"
 
@@ -339,45 +343,45 @@ msgstr "konnte Blockgerät nicht öffnen"
 msgid "failed to determine size of block device"
 msgstr "konnte Größe des Blockgeräts nicht ermitteln"
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "Speicherzuweisung für `option' fehlgeschlagen"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "Speicherzuweisung für `argv' der Option fehlgeschlagen"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr "numerischen Wert nicht verstanden"
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "Ganzzahliges Argument erwartet"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "numerisches Argument erwartet"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "`%s --help' zeigt weitere Informationen an."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "`%s -h' zeigt weitere Informationen an."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -385,24 +389,24 @@ msgstr ""
 "Beim Beobachten von Dateideskriptoren können keine Optionen für den "
 "Zeilenmodus oder den Übertragungsmodifikator verwendet werden"
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "Beim Beobachten von Dateideskriptoren kann Cursor-Positionierung nicht "
 "verwendet werden"
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 "Beim Beobachten von Dateideskriptoren kann die Fernbedienung nicht verwenden "
 "werden"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 "Beim Beobachten von Dateideskriptoren können Dateien nicht übertragen werden"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "Nicht verfügbar auf Systemen ohne /proc/self/fdinfo"
 
@@ -454,7 +458,7 @@ msgstr "yzafpnµm kMGTPEZY"
 msgid "yzafpnum KMGTPEZY"
 msgstr "yzafpnµm KMGTPEZY"
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "Speicherzuweisung für den Puffer fehlgeschlagen"
 
@@ -525,7 +529,7 @@ msgstr "Rate min/mittel/max/abweichung"
 msgid "rate not measured"
 msgstr "Übertragungsrate nicht gemessen"
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -533,7 +537,7 @@ msgstr "Übertragungsrate nicht gemessen"
 msgid "pid"
 msgstr "pid"
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -543,21 +547,17 @@ msgstr "fd"
 msgid "history structure allocation failed"
 msgstr "Speicherzuweisung für `history' fehlgeschlagen"
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr "Speicherzuweisung für die Dateiliste fehlgeschlagen"
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "process list allocation failed"
-msgstr "Speicherzuweisung für die Dateiliste fehlgeschlagen"
+msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "file descriptor list allocation failed"
-msgstr "Speicherzuweisung für die Dateiliste fehlgeschlagen"
+msgstr ""
 
 #: src/pv/transfer.c:490
 msgid "read failed"
@@ -579,30 +579,33 @@ msgstr "konnte den Fehler nicht überwinden"
 msgid "skipped past read error"
 msgstr "über den Lesefehler hinaus verschoben"
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr "Speicherzuweisung für den Transferpuffer fehlgeschlagen"
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr "konnte Intervall-Timer nicht setzen"
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr "konnte Intervall-Timer nicht löschen"
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr "Zuweisung des Zeilenpuffers fehlgeschlagen"
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "write-Aufruf fehlgeschlagen"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "select-Aufruf fehlgeschlagen"
 
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:203
 msgid "not a regular file or block device"
 msgstr "ist weder eine normale Datei noch ein Blockgerät"
+
+#~ msgid "PID[:FD]"
+#~ msgstr "PID[:FD]"

po/es.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "Language: es\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -163,8 +163,8 @@ msgstr ""
 msgid "use cursor positioning escape sequences"
 msgstr ""
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr ""
 
@@ -213,60 +213,64 @@ msgid "use direct I/O to bypass cache"
 msgstr ""
 
 #: src/main/help.c:355
-msgid "discard input instead of writing to output"
+msgid "try to seek instead of writing null bytes"
 msgstr ""
 
 #: src/main/help.c:358
-msgid "write all input to FILE before writing to output"
+msgid "discard input instead of writing to output"
-msgstr ""
-
-#: src/main/help.c:360
-msgid "PID[:FD]"
 msgstr ""
 
 #: src/main/help.c:361
-msgid "watch file FD opened by process PID"
+msgid "write all input to FILE before writing to output"
+msgstr ""
+
+#: src/main/help.c:363
+msgid "PID[:FD]|=NAME|@LISTFILE"
 msgstr ""
 
 #: src/main/help.c:364
+msgid "watch file FD opened by process PID"
+msgstr ""
+
+#: src/main/help.c:367
 msgid "PID"
 msgstr ""
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr ""
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr ""
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr ""
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr ""
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr ""
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr ""
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr ""
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr ""
@@ -283,11 +287,11 @@ msgstr ""
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr ""
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr ""
 
@@ -315,63 +319,63 @@ msgstr ""
 msgid "failed to determine size of block device"
 msgstr ""
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr ""
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr ""
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr ""
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr ""
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr ""
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr ""
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr ""
 
@@ -423,7 +427,7 @@ msgstr ""
 msgid "yzafpnum KMGTPEZY"
 msgstr ""
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr ""
 
@@ -494,7 +498,7 @@ msgstr ""
 msgid "rate not measured"
 msgstr ""
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -502,7 +506,7 @@ msgstr ""
 msgid "pid"
 msgstr ""
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -512,15 +516,15 @@ msgstr ""
 msgid "history structure allocation failed"
 msgstr ""
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr ""
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
 msgid "process list allocation failed"
 msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
 msgid "file descriptor list allocation failed"
 msgstr ""
 
@@ -544,27 +548,27 @@ msgstr ""
 msgid "skipped past read error"
 msgstr ""
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr ""
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr ""
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr ""
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr ""
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr ""
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr ""
 

po/fi.po

@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: pv 1.9.34\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -168,8 +168,8 @@ msgstr ""
 msgid "use cursor positioning escape sequences"
 msgstr ""
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr ""
 
@@ -218,60 +218,64 @@ msgid "use direct I/O to bypass cache"
 msgstr ""
 
 #: src/main/help.c:355
-msgid "discard input instead of writing to output"
+msgid "try to seek instead of writing null bytes"
 msgstr ""
 
 #: src/main/help.c:358
-msgid "write all input to FILE before writing to output"
+msgid "discard input instead of writing to output"
-msgstr ""
-
-#: src/main/help.c:360
-msgid "PID[:FD]"
 msgstr ""
 
 #: src/main/help.c:361
-msgid "watch file FD opened by process PID"
+msgid "write all input to FILE before writing to output"
+msgstr ""
+
+#: src/main/help.c:363
+msgid "PID[:FD]|=NAME|@LISTFILE"
 msgstr ""
 
 #: src/main/help.c:364
+msgid "watch file FD opened by process PID"
+msgstr ""
+
+#: src/main/help.c:367
 msgid "PID"
 msgstr ""
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr ""
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr ""
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr ""
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr ""
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr ""
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr ""
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr ""
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr ""
@@ -288,11 +292,11 @@ msgstr ""
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr ""
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr ""
 
@@ -320,63 +324,63 @@ msgstr ""
 msgid "failed to determine size of block device"
 msgstr ""
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr ""
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr ""
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr ""
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr ""
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr ""
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr ""
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr ""
 
@@ -428,7 +432,7 @@ msgstr ""
 msgid "yzafpnum KMGTPEZY"
 msgstr ""
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr ""
 
@@ -499,7 +503,7 @@ msgstr ""
 msgid "rate not measured"
 msgstr ""
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -507,7 +511,7 @@ msgstr ""
 msgid "pid"
 msgstr ""
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -517,15 +521,15 @@ msgstr ""
 msgid "history structure allocation failed"
 msgstr ""
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr ""
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
 msgid "process list allocation failed"
 msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
 msgid "file descriptor list allocation failed"
 msgstr ""
 
@@ -549,27 +553,27 @@ msgstr ""
 msgid "skipped past read error"
 msgstr ""
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr ""
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr ""
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr ""
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr ""
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr ""
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr ""
 

po/fr.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: 2025-05-31 08:58+0000\n"
 "Last-Translator: milimarg <milimarg@noreply.codeberg.org>\n"
 "Language-Team: French <https://translate.codeberg.org/projects/pv/pv/fr/>\n"
@@ -186,8 +186,8 @@ msgstr ""
 msgid "use cursor positioning escape sequences"
 msgstr "utiliser les séquences d'échappements de positionnement de curseur"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr "FICHIER"
 
@@ -236,62 +236,66 @@ msgid "use direct I/O to bypass cache"
 msgstr "utiliser les E/S directes pour contourner le cache"
 
 #: src/main/help.c:355
+msgid "try to seek instead of writing null bytes"
+msgstr ""
+
+#: src/main/help.c:358
 msgid "discard input instead of writing to output"
 msgstr "rejeter l'entrée au lieu de l'écrire vers la sortie"
 
-#: src/main/help.c:358
+#: src/main/help.c:361
 msgid "write all input to FILE before writing to output"
 msgstr "écrire toute l'entrée vers FICHIER avant de l'écrire vers la sortie"
 
-#: src/main/help.c:360
+#: src/main/help.c:363
-msgid "PID[:FD]"
+msgid "PID[:FD]|=NAME|@LISTFILE"
-msgstr "PID[:FD]"
+msgstr ""
 
-#: src/main/help.c:361
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "surveiller le fichier FD ouvert par le processus PID"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr "PID"
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "mettre à jour la configuration du processus PID"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "enregistrer l'ID de processus dans FICHIER"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "afficher cette aide puis quitter"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "afficher la version puis quitter"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr "écrire les journaux de déboggage vers FICHIER"
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Utilisation : %s [OPTIONS] [FICHIER]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 "Concaténer FICHIER(s), ou l'entrée standard, sur la sortie standard avec "
 "monitorage."
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr "Séquences de formatage supportées :"
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "SVP rapporter tous bogues à %s"
@@ -308,11 +312,11 @@ msgstr "échec de l'allocation de mémoire de condition"
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "ID de processus ou paire pid:fd attendue"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "ID de processus non valide"
 
@@ -340,45 +344,45 @@ msgstr "échec de l'ouverture du périphérique de bloc"
 msgid "failed to determine size of block device"
 msgstr "échec de l'évaluation de la taille du périphérique de bloc"
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "l'allocation pour la structure d'une option a échoué"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "l'allocation pour la structure de l'option argv a échoué"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr "valeur numérique non comprise"
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "Valeur entière attendue"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "Valeur numérique attendue"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Essayez `%s --help' pour plus d'informations."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Essayez `%s -h' pour plus d'informations."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -386,25 +390,25 @@ msgstr ""
 "impossible d'utiliser le mode ligne ou les options de modificateur de "
 "transfert lors de la visualisation des descripteurs de fichiers"
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "impossible d'utiliser le positionnement du curseur lors de la visualisation "
 "des descripteurs de fichier"
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 "impossible d'utiliser la télécommande lors de la visualisation des "
 "descripteurs de fichiers"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 "impossible de transférer des fichiers lorsque vous regardez des descripteurs "
 "de fichiers"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "non disponible sur les systèmes sans /proc/self/fdinfo"
 
@@ -458,7 +462,7 @@ msgstr "yzafpnum kMGTPEZY"
 msgid "yzafpnum KMGTPEZY"
 msgstr "yzafpnum KMGTPEZY"
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "échec de l'allocation de mémoire tampon"
 
@@ -529,7 +533,7 @@ msgstr "taux min/moy/max/écart-type"
 msgid "rate not measured"
 msgstr "taux non mesuré"
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -537,7 +541,7 @@ msgstr "taux non mesuré"
 msgid "pid"
 msgstr "pid"
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -547,21 +551,17 @@ msgstr "fd"
 msgid "history structure allocation failed"
 msgstr "l'allocation de la structure de l'historique a échoué"
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr "échec de l'allocation de la liste de fichiers"
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "process list allocation failed"
-msgstr "échec de l'allocation de la liste de fichiers"
+msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "file descriptor list allocation failed"
-msgstr "échec de l'allocation de la liste de fichiers"
+msgstr ""
 
 #: src/pv/transfer.c:490
 msgid "read failed"
@@ -583,27 +583,27 @@ msgstr "n'a pas réussi à dépasser l'erreur"
 msgid "skipped past read error"
 msgstr "erreur de lecture dépassée"
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr "aucun tampon de transfert alloué"
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr "La définition de l'intervalle du minuteur a échoué"
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr "La réinitialisation des intervalles du minuteur a échoué"
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr "L'allocation de la position de la ligne de la mémoire tampon a échoué"
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "l'écriture a échoué"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "l'appel de sélection a échoué"
 
@@ -611,5 +611,8 @@ msgstr "l'appel de sélection a échoué"
 msgid "not a regular file or block device"
 msgstr "pas un fichier ordinaire ou un périphérique de bloc"
 
+#~ msgid "PID[:FD]"
+#~ msgstr "PID[:FD]"
+
 #~ msgid "failed to set alarm signal handler"
 #~ msgstr "échec de la définition du gestionnaire de signal d'alarme"

po/pl.po

@@ -6,7 +6,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: 2025-10-02 13:23+0000\n"
 "Last-Translator: Coral Pink <coralpink@noreply.codeberg.org>\n"
 "Language-Team: Polish <https://translate.codeberg.org/projects/pv/pv/pl/>\n"
@@ -178,8 +178,8 @@ msgstr "pokaż wyjście nawet standardowe wyjście błędu nie jest terminalem"
 msgid "use cursor positioning escape sequences"
 msgstr "używaj znaków ucieczki do pozycjonowania kursora"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr "PLIK"
 
@@ -229,63 +229,67 @@ msgstr ""
 "użyj bezpośredniego wejścia/wyjścia celem pominięcia pamięci podręcznej"
 
 #: src/main/help.c:355
+msgid "try to seek instead of writing null bytes"
+msgstr ""
+
+#: src/main/help.c:358
 msgid "discard input instead of writing to output"
 msgstr "zignoruj dane wejściowe zamiast wyświetlić je na wyjściu standardowym"
 
-#: src/main/help.c:358
+#: src/main/help.c:361
 msgid "write all input to FILE before writing to output"
 msgstr ""
 "zapisz wszystkie dane wejściowe do PLIK przed wyświetleniem ich na wyjściu"
 
-#: src/main/help.c:360
+#: src/main/help.c:363
-msgid "PID[:FD]"
+msgid "PID[:FD]|=NAME|@LISTFILE"
-msgstr "PID[:FD]"
+msgstr ""
 
-#: src/main/help.c:361
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "obserwuj plik FD otworzony przez proces PID"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr "PID"
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "zaktualizuj ustawienia procesu PID"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "zapisz ID procesu do PLIK"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "wyświetl te informacje z pomocą i wyjdź"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "wyświetl informacje o wersji i wyjdź"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr "zapisz logi debugujące do PLIK"
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Sposób użycia: %s [OPCJA] [PLIK]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 "Łączenie PLIK(ów) lub wejścia standardowego, do wyjścia standardowego z "
 "monitoringiem."
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr "Wspierane sekwencje formatowania:"
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "Proszę przesyłać zgłoszenia błędów do %s"
@@ -302,11 +306,11 @@ msgstr "alokacja stanu programu nie powiodła się"
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "oczekiwany proces ID lub para PID:FD"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "niepoprawne ID procesu"
 
@@ -334,45 +338,45 @@ msgstr "nie udało się otworzyć urządzenia blokowego"
 msgid "failed to determine size of block device"
 msgstr "nie udało się ustalić rozmiaru urządzenia blokowego"
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "nie udało się zaalokować struktur opcji"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "nie udało się zaalokować struktur opcji argv"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr "wartość liczbowa niezrozumiana"
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "oczekiwany argument typu liczby całkowitej"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "oczekiwany argument liczbowy"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Spróbuj `%s --help' by uzyskać więcej informacji."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Spróbuj `%s -h' by uzyskać więcej informacji."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -380,23 +384,23 @@ msgstr ""
 "nie można użyć trybu zliczania linii lub opcji modyfikujących przesył "
 "łącznie z opcją obserwowania deskryptorów plików"
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "nie można użyć pozycjonowania kursora łącznie z opcją obserwowania "
 "deskryptorów plików"
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 "nie można użyć opcji zaktualizowania ustawień procesu łącznie z opcją "
 "obserwowania deskryptorów plików"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr "nie można przesyłać plików z opcją obserwowania deskryptorów plików"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "niedostępne na systemach bez /proc/self/fdinfo"
 
@@ -449,7 +453,7 @@ msgstr "yzafpnum kMGTPEZY"
 msgid "yzafpnum KMGTPEZY"
 msgstr "yzafpnum KMGTPEZY"
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "nie udało się zaalokować bufora"
 
@@ -521,7 +525,7 @@ msgstr "prędkość min/śr/max/odch"
 msgid "rate not measured"
 msgstr "prędkość niezmierzona"
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -529,7 +533,7 @@ msgstr "prędkość niezmierzona"
 msgid "pid"
 msgstr "pid"
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -539,15 +543,15 @@ msgstr "fd"
 msgid "history structure allocation failed"
 msgstr "nie udało się zaalokować struktury historii"
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr "nie udało się zaalokować listy plików"
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
 msgid "process list allocation failed"
 msgstr "nie udało się zaalokować listy procesów"
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
 msgid "file descriptor list allocation failed"
 msgstr "nie udało się zaalokować listy deskryptorów plików"
 
@@ -571,31 +575,34 @@ msgstr "nie udało się przewinąć za błąd"
 msgid "skipped past read error"
 msgstr "pominięto błąd odczytu"
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr "brak zaalokowanego bufora transferu"
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr "nie udało się ustawić interwału czasowego"
 
 # "Przewidywany czas ukończenia" for ETA is too long
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr "nie udało się wyczyścić interwału czasowego"
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr "alokacja buforu pozycji linii nie powiodła się"
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "błąd zapisu"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "nie udało się wywołać funkcji select"
 
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:203
 msgid "not a regular file or block device"
 msgstr "plik nie jest plikiem regularnym lub urządzeniem blokowym"
+
+#~ msgid "PID[:FD]"
+#~ msgstr "PID[:FD]"

po/pt.po

@@ -6,7 +6,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -171,8 +171,8 @@ msgstr "gera dados mesmo que a saída de erro seja redirecionada"
 msgid "use cursor positioning escape sequences"
 msgstr "utiliza caracteres de escape para posicionar o cursor"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr ""
 
@@ -221,62 +221,66 @@ msgid "use direct I/O to bypass cache"
 msgstr ""
 
 #: src/main/help.c:355
-msgid "discard input instead of writing to output"
+msgid "try to seek instead of writing null bytes"
 msgstr ""
 
 #: src/main/help.c:358
-msgid "write all input to FILE before writing to output"
+msgid "discard input instead of writing to output"
-msgstr ""
-
-#: src/main/help.c:360
-msgid "PID[:FD]"
 msgstr ""
 
 #: src/main/help.c:361
+msgid "write all input to FILE before writing to output"
+msgstr ""
+
+#: src/main/help.c:363
+msgid "PID[:FD]|=NAME|@LISTFILE"
+msgstr ""
+
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "assistir arquivo FD aberto pelo processo PID"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr ""
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "atualizar as configurações do processo PID"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "salvar ID do processo em FILE"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "exibe esta tela de ajuda e termina"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "exibe a versão e termina"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr ""
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Uso: %s [OPÇÕES] [ARQUIVOS]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 "Concatena ARQUIVO(s) ou a entrada padrão e grava na saída padrão, com "
 "monitoramento."
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr ""
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "Por favor, reporte quaisquer defeitos para %s"
@@ -293,11 +297,11 @@ msgstr "alocação de memória de status falhou"
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "ID do processo ou par pid:fd esperado"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "ID de processo inválido"
 
@@ -325,45 +329,45 @@ msgstr ""
 msgid "failed to determine size of block device"
 msgstr ""
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "erro na alocação da estrutura de opções"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "erro na alocação da estrutura de opções argv"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "argumento inteiro esperado"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "argumento numérico esperado"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Tente `%s --help' para maiores informações."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Tente `%s -h' para maiores informações."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -371,21 +375,21 @@ msgstr ""
 "não pode usar o modo de linha ou opções de modificador de transferência ao "
 "assistir os descritores de arquivo"
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "não pode usar o posicionamento do cursor ao observar os descritores de "
 "arquivo"
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr "não pode usar o controle remoto ao assistir os descritores de arquivo"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr "não pode transferir arquivos ao assistir descritores de arquivo"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "não disponível em sistemas sem /proc/self/fdinfo"
 
@@ -437,7 +441,7 @@ msgstr ""
 msgid "yzafpnum KMGTPEZY"
 msgstr ""
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "erro alocando o buffer"
 
@@ -508,7 +512,7 @@ msgstr ""
 msgid "rate not measured"
 msgstr ""
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -516,7 +520,7 @@ msgstr ""
 msgid "pid"
 msgstr ""
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -526,21 +530,17 @@ msgstr ""
 msgid "history structure allocation failed"
 msgstr ""
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr ""
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
-#, fuzzy
-#| msgid "state allocation failed"
 msgid "process list allocation failed"
-msgstr "alocação de memória de status falhou"
+msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
-#, fuzzy
-#| msgid "state allocation failed"
 msgid "file descriptor list allocation failed"
-msgstr "alocação de memória de status falhou"
+msgstr ""
 
 #: src/pv/transfer.c:490
 msgid "read failed"
@@ -562,27 +562,27 @@ msgstr "não pode ir além do erro"
 msgid "skipped past read error"
 msgstr "ignorado erro de leitura"
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr ""
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr ""
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr ""
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr ""
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "erro de gravação"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "erro na chamada da função select"
 

po/ru.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: 2025-01-15 19:08+0000\n"
 "Last-Translator: 0ko <0ko@users.noreply.translate.codeberg.org>\n"
 "Language-Team: Russian <https://translate.codeberg.org/projects/pv/pv/ru/>\n"
@@ -170,8 +170,8 @@ msgid "use cursor positioning escape sequences"
 msgstr ""
 "использовать символьные последовательности для позиционирования курсора"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr "ФАЙЛ"
 
@@ -220,60 +220,64 @@ msgid "use direct I/O to bypass cache"
 msgstr "использовать прямой ввод/вывод для обхода кеша"
 
 #: src/main/help.c:355
+msgid "try to seek instead of writing null bytes"
+msgstr ""
+
+#: src/main/help.c:358
 msgid "discard input instead of writing to output"
 msgstr "отбрасывать ввод вместо записи в вывод"
 
-#: src/main/help.c:358
+#: src/main/help.c:361
 msgid "write all input to FILE before writing to output"
 msgstr "записывать весь ввод в ФАЙЛ прежде, чем отправлять на вывод"
 
-#: src/main/help.c:360
+#: src/main/help.c:363
-msgid "PID[:FD]"
+msgid "PID[:FD]|=NAME|@LISTFILE"
-msgstr "ИДпр[:FD]"
+msgstr ""
 
-#: src/main/help.c:361
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "следить за FD файла, открытого процессом ИДпр"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr "ИДпр"
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "обновить настройки ИДпр процесса"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "сохранить ИД процесса в ФАЙЛ"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "показать справку и завершить работу"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "показать версию программы и завершить работу"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr "вести запись отладочного журнала в ФАЙЛ"
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Использование: %s [ОПЦИИ] [ФАЙЛ]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr "Поддерживаемые последовательности:"
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "Сообщайте о проблемах на: %s"
@@ -290,11 +294,11 @@ msgstr ""
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "ожидался ИД процесса или пара ИДпр:ДФ"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "неправильный ИД процесса"
 
@@ -322,63 +326,63 @@ msgstr "не удалось открыть блочное устройство"
 msgid "failed to determine size of block device"
 msgstr "не удалось определить размер блочного устройства"
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "не удалось выделить память для структуры опций"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "не удалось выделить память для структуры опций argv"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr "число не распознано"
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "ожидалось целое число"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "ожидалось число"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Выполните `%s --help' для получения подробностей."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Выполните `%s -h' для получения подробностей."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr "удалённое управление невозможно при отслеживании дескрипторов файлов"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr "передача файлов невозможна при отслеживании дескрипторов файлов"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "невозможно на системах без /proc/self/fdinfo"
 
@@ -432,7 +436,7 @@ msgstr ""
 msgid "yzafpnum KMGTPEZY"
 msgstr ""
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "не удалось выделить память для буфера"
 
@@ -503,7 +507,7 @@ msgstr "скор. мин/сред/макс/дев"
 msgid "rate not measured"
 msgstr "скорость не изменяется"
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -511,7 +515,7 @@ msgstr "скорость не изменяется"
 msgid "pid"
 msgstr "ИДпр"
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -521,21 +525,17 @@ msgstr "дф"
 msgid "history structure allocation failed"
 msgstr "не удалось выделить память для структуры истории"
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr "не удалось выделить память для списка файлов"
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "process list allocation failed"
-msgstr "не удалось выделить память для списка файлов"
+msgstr ""
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
-#, fuzzy
-#| msgid "file list allocation failed"
 msgid "file descriptor list allocation failed"
-msgstr "не удалось выделить память для списка файлов"
+msgstr ""
 
 #: src/pv/transfer.c:490
 msgid "read failed"
@@ -557,30 +557,33 @@ msgstr ""
 msgid "skipped past read error"
 msgstr ""
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr "не выделена память для буфера передачи"
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr "не удалось задать измеритель временного промежутка"
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr "не удалось очистить измеритель временного промежутка"
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr ""
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "запись не удалась"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "запрос выборки не удался"
 
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:203
 msgid "not a regular file or block device"
 msgstr "не является обычным файлом или блочным устройством"
+
+#~ msgid "PID[:FD]"
+#~ msgstr "ИДпр[:FD]"

po/tr.po

@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: pv 1.8.14\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-10-11 16:00+0100\n"
+"POT-Creation-Date: 2025-10-18 19:34+0100\n"
 "PO-Revision-Date: 2025-10-05 20:09+0000\n"
 "Last-Translator: Oğuz Ersen <ersen@noreply.codeberg.org>\n"
 "Language-Team: Turkish <https://translate.codeberg.org/projects/pv/pv/tr/>\n"
@@ -169,8 +169,8 @@ msgstr "standart hata bir terminal olmasa bile çıktı yazdır"
 msgid "use cursor positioning escape sequences"
 msgstr "imleç konumlandırma kaçış dizilerini kullan"
 
-#: src/main/help.c:327 src/main/help.c:357 src/main/help.c:369
+#: src/main/help.c:327 src/main/help.c:360 src/main/help.c:372
-#: src/main/help.c:379
+#: src/main/help.c:382
 msgid "FILE"
 msgstr "DOSYA"
 
@@ -219,61 +219,65 @@ msgid "use direct I/O to bypass cache"
 msgstr "Önbelleği atlamak için doğrudan I/O kullan"
 
 #: src/main/help.c:355
+msgid "try to seek instead of writing null bytes"
+msgstr ""
+
+#: src/main/help.c:358
 msgid "discard input instead of writing to output"
 msgstr "Girdiyi çıktıya yazmak yerine yok say"
 
-#: src/main/help.c:358
+#: src/main/help.c:361
 msgid "write all input to FILE before writing to output"
 msgstr "çıktıya yazmadan önce tüm girdiyi DOSYA'ya yaz"
 
-#: src/main/help.c:360
+#: src/main/help.c:363
-msgid "PID[:FD]"
+msgid "PID[:FD]|=NAME|@LISTFILE"
-msgstr "PID[:FD]"
+msgstr ""
 
-#: src/main/help.c:361
+#: src/main/help.c:364
 msgid "watch file FD opened by process PID"
 msgstr "FD izleme dosyası PID işlemi tarafından açıldı"
 
-#: src/main/help.c:364
+#: src/main/help.c:367
 msgid "PID"
 msgstr "PID"
 
-#: src/main/help.c:365
+#: src/main/help.c:368
 msgid "update settings of process PID"
 msgstr "süreç PID ayarlarını güncelle"
 
-#: src/main/help.c:370
+#: src/main/help.c:373
 msgid "save process ID in FILE"
 msgstr "FILE'da işlem kimliğini (ID) kaydet"
 
-#: src/main/help.c:373
+#: src/main/help.c:376
 msgid "show this help and exit"
 msgstr "bu yardımı göster ve çık"
 
-#: src/main/help.c:376
+#: src/main/help.c:379
 msgid "show version information and exit"
 msgstr "sürüm bilgilerini göster ve çık"
 
-#: src/main/help.c:380
+#: src/main/help.c:383
 msgid "write debug logs to FILE"
 msgstr "Hata ayıklama kayıtlarını DOSYA'ya yaz"
 
-#: src/main/help.c:406
+#: src/main/help.c:409
 #, c-format
 msgid "Usage: %s [OPTION] [FILE]..."
 msgstr "Kullanım şekli: %s [AYAR] [DOSYA]..."
 
-#: src/main/help.c:417
+#: src/main/help.c:420
 msgid ""
 "Concatenate FILE(s), or standard input, to standard output, with monitoring."
 msgstr ""
 "İzleme ile DOSYA(lar)ı veya standart girdiyi standart çıktı ile birleştirin."
 
-#: src/main/help.c:555
+#: src/main/help.c:558
 msgid "Supported format sequences:"
 msgstr "Desteklenen biçim dizileri:"
 
-#: src/main/help.c:569
+#: src/main/help.c:572
 #, c-format
 msgid "Please report any bugs to: %s"
 msgstr "Lütfen hataları şu adrese bildirin: %s"
@@ -290,11 +294,11 @@ msgstr "durum tahsisi başarısız oldu"
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:802
+#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:804
 msgid "process ID or pid:fd pair expected"
 msgstr "süreç kimliği (ID) veya pid:fd çifti bekleniyor"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:809
+#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:811
 msgid "invalid process ID"
 msgstr "geçersiz süreç kimliği (ID)"
 
@@ -322,45 +326,45 @@ msgstr "blok aygıtı açılamadı"
 msgid "failed to determine size of block device"
 msgstr "blok aygıtının boyutu belirlenemedi"
 
-#: src/main/options.c:649
+#: src/main/options.c:651
 msgid "option structure allocation failed"
 msgstr "seçenek yapısı tahsisi başarısız oldu"
 
-#: src/main/options.c:668
+#: src/main/options.c:670
 msgid "option structure argv allocation failed"
 msgstr "seçenek yapısı argv tahsisi başarısız oldu"
 
-#: src/main/options.c:720
+#: src/main/options.c:722
 msgid "numeric value not understood"
 msgstr "sayısal değer anlaşılmadı"
 
-#: src/main/options.c:738
+#: src/main/options.c:740
 msgid "integer argument expected"
 msgstr "tamsayı bağımsız değişkeni bekleniyor"
 
-#: src/main/options.c:750
+#: src/main/options.c:752
 msgid "numeric argument expected"
 msgstr "sayısal bağımsız değişken bekleniyor"
 
-#: src/main/options.c:762
+#: src/main/options.c:764
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:790
+#: src/main/options.c:792
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1042
+#: src/main/options.c:1048
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Daha fazla bilgi için `%s --help' seçeneğini deneyin."
 
-#: src/main/options.c:1044
+#: src/main/options.c:1050
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Daha fazla bilgi için `%s -h' seçeneğini deneyin."
 
-#: src/main/options.c:1075
+#: src/main/options.c:1081
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -368,19 +372,19 @@ msgstr ""
 "dosya tanımlayıcılarını izlerken satır modu veya aktarım değiştirici "
 "seçeneklerini kullanamaz"
 
-#: src/main/options.c:1084
+#: src/main/options.c:1090
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr "dosya tanımlayıcılarını izlerken imleç konumlandırmayı kullanamaz"
 
-#: src/main/options.c:1093
+#: src/main/options.c:1099
 msgid "cannot use remote control when watching file descriptors"
 msgstr "dosya tanımlayıcılarını izlerken uzaktan kumandayı kullanamaz"
 
-#: src/main/options.c:1102
+#: src/main/options.c:1108
 msgid "cannot transfer files when watching file descriptors"
 msgstr "dosya tanımlayıcıları izlenirken dosya aktarılamıyor"
 
-#: src/main/options.c:1127
+#: src/main/options.c:1133
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "/proc/self/fdinfo olmayan sistemlerde kullanılamaz"
 
@@ -433,7 +437,7 @@ msgstr "yzafpnum kMGTPEZY"
 msgid "yzafpnum KMGTPEZY"
 msgstr "yzafpnum KMGTPEZY"
 
-#: src/pv/display.c:1053 src/pv/loop.c:747 src/pv/transfer.c:1083
+#: src/pv/display.c:1053 src/pv/loop.c:754 src/pv/transfer.c:1135
 msgid "buffer allocation failed"
 msgstr "arabellek tahsisi başarısız oldu"
 
@@ -504,7 +508,7 @@ msgstr "oran min/ortalama/maks/standart sapma"
 msgid "rate not measured"
 msgstr "oran ölçülmedi"
 
-#: src/pv/loop.c:768 src/pv/loop.c:784 src/pv/loop.c:802 src/pv/watchpid.c:99
+#: src/pv/loop.c:775 src/pv/loop.c:791 src/pv/loop.c:809 src/pv/watchpid.c:99
 #: src/pv/watchpid.c:108 src/pv/watchpid.c:119 src/pv/watchpid.c:127
 #: src/pv/watchpid.c:164 src/pv/watchpid.c:183 src/pv/watchpid.c:191
 #: src/pv/watchpid.c:201 src/pv/watchpid.c:299 src/pv/watchpid.c:307
@@ -512,7 +516,7 @@ msgstr "oran ölçülmedi"
 msgid "pid"
 msgstr "pid"
 
-#: src/pv/loop.c:802 src/pv/watchpid.c:108 src/pv/watchpid.c:120
+#: src/pv/loop.c:809 src/pv/watchpid.c:108 src/pv/watchpid.c:120
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:183 src/pv/watchpid.c:192
 #: src/pv/watchpid.c:203
 msgid "fd"
@@ -522,15 +526,15 @@ msgstr "fd"
 msgid "history structure allocation failed"
 msgstr "geçmiş yapısı tahsisi başarısız oldu"
 
-#: src/pv/state.c:685 src/pv/state.c:697
+#: src/pv/state.c:741 src/pv/state.c:753
 msgid "file list allocation failed"
 msgstr "dosya listesi tahsisi başarısız oldu"
 
-#: src/pv/state.c:731
+#: src/pv/state.c:787
 msgid "process list allocation failed"
 msgstr "işlem listesi tahsisi başarısız oldu"
 
-#: src/pv/state.c:739
+#: src/pv/state.c:795
 msgid "file descriptor list allocation failed"
 msgstr "dosya tanımlayıcı listesi tahsisi başarısız oldu"
 
@@ -554,30 +558,33 @@ msgstr "geçmiş hatayı aramakta başarısız oldu"
 msgid "skipped past read error"
 msgstr "geçmiş okuma hatası atlandı"
 
-#: src/pv/transfer.c:660
+#: src/pv/transfer.c:663
 msgid "no transfer buffer allocated"
 msgstr "aktarım arabelleği ayrılmamış"
 
-#: src/pv/transfer.c:702
+#: src/pv/transfer.c:751
 msgid "failed to set interval timer"
 msgstr "aralık zamanlayıcısı ayarlanamadı"
 
-#: src/pv/transfer.c:728
+#: src/pv/transfer.c:777
 msgid "failed to clear interval timer"
 msgstr "aralık zamanlayıcısı temizlenemedi"
 
-#: src/pv/transfer.c:770
+#: src/pv/transfer.c:822
 msgid "line position buffer allocation failed"
 msgstr "satır konumu arabellek tahsisi başarısız oldu"
 
-#: src/pv/transfer.c:944
+#: src/pv/transfer.c:996
 msgid "write failed"
 msgstr "yazma başarısız"
 
-#: src/pv/transfer.c:1185
+#: src/pv/transfer.c:1237
 msgid "select call failed"
 msgstr "seçme çağrısı başarısız oldu"
 
 #: src/pv/watchpid.c:129 src/pv/watchpid.c:203
 msgid "not a regular file or block device"
 msgstr "normal bir dosya veya blok aygıtı değil"
+
+#~ msgid "PID[:FD]"
+#~ msgstr "PID[:FD]"

src/include/options.h

@@ -89,6 +89,7 @@ struct opts_s {
 	bool stop_at_size;             /* set if we stop at "size" bytes */
 	bool sync_after_write;         /* set if we sync after every write */
 	bool direct_io;                /* set if O_DIRECT is to be used */
+	bool sparse_output;            /* set if we leave holes in the output */
 	bool discard_input;            /* set to write nothing to output */
 	bool show_stats;	       /* set to write statistics at the end */
 	bool width_set_manually;       /* width was set manually, not detected */

src/include/pv-internal.h

@@ -203,11 +203,12 @@ struct pvstate_s {
 		bool decimal_units;		 /* use decimal prefixes */
 		bool null_terminated_lines;      /* lines are null-terminated */
 		bool no_display;                 /* do nothing other than pipe data */
+		bool no_splice;                  /* never use splice() */
 		bool stop_at_size;               /* set if we stop at "size" bytes */
 		bool sync_after_write;           /* set if we sync after every write */
 		bool direct_io;                  /* set if O_DIRECT is to be used */
 		bool direct_io_changed;          /* set when direct_io is changed */
-		bool no_splice;                  /* never use splice() */
+		bool sparse_output;		 /* set if we leave holes in the output */
 		bool discard_input;              /* write nothing to stdout */
 		bool show_stats;		 /* show statistics on exit */
 		bool width_set_manually;	 /* width was set manually, not detected */
@@ -437,6 +438,7 @@ struct pvstate_s {
 		bool splice_used;
 #endif
 		bool read_error_warning_shown;
+		bool output_not_seekable;	/* set if lseek() fails on output */
 	} transfer;
 };
 
@@ -518,11 +520,11 @@ struct pvwatchfd_s {
 	off_t size;			 /* size of whole file, 0 if unknown */
 	off_t position;			 /* position last seen at */
 	struct timespec start_time;	 /* time we started watching the fd */
-	struct timespec last_active;	 /* time the fd was last seen open (TODO, #81) */
+	struct timespec end_time;	 /* time the fd was marked as closed */
-	pid_t watch_pid;		 /* PID to watch */
+	pid_t watch_pid;		 /* PID the fd belongs to */
 	int watch_fd;			 /* fd to watch */
+	bool closed;			 /* true once the fd is closed */
 	bool displayable;		 /* false if not displayable */
-	bool inactive;			 /* true if the fd is now closed (TODO, #81) */
 	bool unused;			 /* true if free for re-use */
 };
 typedef struct pvwatchfd_s *pvwatchfd_t;

src/include/pv.h

@@ -221,6 +221,7 @@ extern void pv_state_error_skip_block_set(pvstate_t, off_t);
 extern void pv_state_stop_at_size_set(pvstate_t, bool);
 extern void pv_state_sync_after_write_set(pvstate_t, bool);
 extern void pv_state_direct_io_set(pvstate_t, bool);
+extern void pv_state_sparse_output_set(pvstate_t, bool);
 extern void pv_state_rate_limit_set(pvstate_t, off_t);
 extern void pv_state_target_buffer_size_set(pvstate_t, size_t);
 extern void pv_state_no_splice_set(pvstate_t, bool);

src/main/help.c

@@ -351,13 +351,16 @@ void display_help(void)
 		{ "-K", "--direct-io", NULL,
 		 N_("use direct I/O to bypass cache"),
 		 { 0, 0, 0, 0} },
+		{ "-O", "--sparse", NULL,
+		 N_("try to seek instead of writing null bytes"),
+		 { 0, 0, 0, 0} },
 		{ "-X", "--discard", NULL,
 		 N_("discard input instead of writing to output"),
 		 { 0, 0, 0, 0} },
 		{ "-U", "--store-and-forward", N_("FILE"),
 		 N_("write all input to FILE before writing to output"),
 		 { 0, 0, 0, 0} },
-		{ "-d", "--watchfd", N_("PID[:FD]"),
+		{ "-d", "--watchfd", N_("PID[:FD]|=NAME|@LISTFILE"),
 		 N_("watch file FD opened by process PID"),
 		 { 0, 0, 0, 0} },
 #ifdef PV_REMOTE_CONTROL

src/main/main.c

@@ -448,7 +448,12 @@ int main(int argc, char **argv)
 	 * do this before looking at setting the size, as the size
 	 * calculation looks at the output file if the input size can't be
 	 * calculated (issue #91).
+	 *
+	 * We have to set the sparse output flag before doing this, so that
+	 * in sparse mode the lseek() on O_APPEND can be done (issue #45);
+	 * see the comments in pv_state_output_set() in src/pv/state.c.
 	 */
+	pv_state_sparse_output_set(state, opts->sparse_output);
 	retcode = pv__set_output(state, opts, opts->output);
 	if (0 != retcode) {
 		pv_state_free(state);

src/main/options.c

@@ -612,6 +612,8 @@ opts_t opts_parse(unsigned int argc, char **argv)
 		{ "stop-at-size", 0, NULL, (int) 'S' },
 		{ "sync", 0, NULL, (int) 'Y' },
 		{ "direct-io", 0, NULL, (int) 'K' },
+		{ "sparse", 0, NULL, (int) 'O' },
+		{ "sparse-output", 0, NULL, (int) 'O' },
 		{ "discard", 0, NULL, (int) 'X' },
 		{ "store-and-forward", 1, NULL, (int) 'U' },
 		{ "remote", 1, NULL, (int) 'R' },
@@ -627,7 +629,7 @@ opts_t opts_parse(unsigned int argc, char **argv)
 	/*@+nullassign@ */
 	int option_index = 0;
 #endif				/* HAVE_GETOPT_LONG */
-	char *short_options = "hVpteIrab8kTA:fvnqcWD:s:gl0i:w:H:N:u:F:x:L:B:CEZ:SYKXU:R:P:d:m:o:"
+	char *short_options = "hVpteIrab8kTA:fvnqcWD:s:gl0i:w:H:N:u:F:x:L:B:CEZ:SYKOXU:R:P:d:m:o:"
 #ifdef ENABLE_DEBUGGING
 	    "!:"
 #endif
@@ -972,6 +974,10 @@ opts_t opts_parse(unsigned int argc, char **argv)
 		case 'K':
 			opts->direct_io = true;
 			break;
+		case 'O':
+			opts->sparse_output = true;
+			opts->no_splice = true;
+			break;
 		case 'X':
 			opts->discard_input = true;
 			opts->no_splice = true;

src/pv/loop.c

@@ -712,7 +712,6 @@ int pv_watchfd_loop(pvstate_t state)
 		int fd;			 /* watched fd, or -1 for all */
 		pvwatchfd_t info_array;	 /* watch information for each fd */
 		int array_length;	 /* length of watch info array */
-		/* TODO: "finished but not time to stop showing" flag for #81 */
 		bool finished;		 /* "PID:FD": fd closed; or PID gone */
 	} *watching;
 	unsigned int watch_idx;
@@ -720,6 +719,14 @@ int pv_watchfd_loop(pvstate_t state)
 	struct timespec next_update, next_remotecheck, cur_time;
 	int prev_displayed_lines, blank_lines;
 
+	/*
+	 * In each watching[].info_array[] fd info item, once its "watch_fd"
+	 * is closed, its "closed" flag is set to true and its "end_time" to
+	 * now.  It isn't marked "unused" until its "end_time" is long
+	 * enough ago, so the information is held on-screen for a short
+	 * while after the fd closes or the PID exits (#81).
+	 */
+
 	/* If there's nothing to watch, do nothing at all. */
 	if (state->watchfd.count < 1)
 		return 0;
@@ -933,10 +940,9 @@ int pv_watchfd_loop(pvstate_t state)
 				if (rc != 0) {
 					/*
 					 * PID now inaccessible - mark it as
-					 * finished and skip over it.
+					 * finished.
 					 */
 					watching[watch_idx].finished = true;
-					continue;
 				}
 			} else {
 				/*
@@ -959,7 +965,6 @@ int pv_watchfd_loop(pvstate_t state)
 			     NULL != watching[watch_idx].info_array && info_idx < watching[watch_idx].array_length;
 			     info_idx++) {
 				off_t position_now;
-				struct timespec init_time, transfer_elapsed;
 				pvwatchfd_t info_item = &(watching[watch_idx].info_array[info_idx]);
 
 				/* Skip unused array entries. */
@@ -976,7 +981,8 @@ int pv_watchfd_loop(pvstate_t state)
 					 * changed.
 					 */
 					if (pv_watchfd_changed(info_item)) {
-						debug("%s %d: %s", "fd", info_item->watch_fd, "removing");
+						debug("%s %d: %s", "fd", info_item->watch_fd,
+						      "non-displayable, and has changed - removing");
 						info_item->unused = true;
 						info_item->displayable = false;
 						pv_freecontents_watchfd(info_item);
@@ -994,34 +1000,85 @@ int pv_watchfd_loop(pvstate_t state)
 				 * changed.
 				 */
 
-				position_now = pv_watchfd_position(info_item);
+				position_now = -1;
 
-				if (position_now < 0) {
+				if (info_item->closed) {
-					debug("%s %d: %s", "fd", info_item->watch_fd, "removing");
+					/*
-					info_item->unused = true;
+					 * Closed fd - check how long since
-					info_item->displayable = false;
+					 * it was closed.
-					pv_freecontents_watchfd(info_item);
+					 */
-					continue;
+					struct timespec time_since_closed;
+					long double seconds_since_closed;
+
+					memset(&time_since_closed, 0, sizeof(time_since_closed));
+					pv_elapsedtime_subtract(&time_since_closed, &cur_time, &(info_item->end_time));
+					seconds_since_closed = pv_elapsedtime_seconds(&time_since_closed);
+
+					/* Closed for long enough - remove. */
+					if (seconds_since_closed > state->control.interval) {
+						debug("%s %d: %s (%Lf s)", "fd", info_item->watch_fd,
+						      "closed for long enough - removing", seconds_since_closed);
+						info_item->unused = true;
+						info_item->displayable = false;
+						pv_freecontents_watchfd(info_item);
+						continue;
+					}
+
+				} else {
+
+					/*
+					 * Open fd - get its current
+					 * position.
+					 */
+
+					position_now = pv_watchfd_position(info_item);
+
+					if (position_now < 0) {
+						/*
+						 * The fd was closed - mark
+						 * as closed.
+						 */
+						debug("%s %d: %s", "fd", info_item->watch_fd, "marking as closed");
+						pv_elapsedtime_copy(&(info_item->end_time), &cur_time);
+						info_item->closed = true;
+					}
 				}
 
-				info_item->position = position_now;
+				if (position_now >= 0) {
+					/*
+					 * If the fd is still open and we
+					 * got its current position, update
+					 * its position and timers.
+					 */
+					struct timespec init_time, transfer_elapsed;
 
-				memset(&init_time, 0, sizeof(init_time));
+					info_item->position = position_now;
-				memset(&transfer_elapsed, 0, sizeof(transfer_elapsed));
+
+					memset(&init_time, 0, sizeof(init_time));
+					memset(&transfer_elapsed, 0, sizeof(transfer_elapsed));
+
+					/*
+					 * Calculate the effective start
+					 * time: the time we actually
+					 * started, plus the total time we
+					 * spent stopped.
+					 */
+					pv_elapsedtime_add(&init_time, &(info_item->start_time),
+							   &(state->signal.toffset));
+
+					/*
+					 * Now get the effective elapsed
+					 * transfer time - current time
+					 * minus effective start time.
+					 */
+					pv_elapsedtime_subtract(&transfer_elapsed, &cur_time, &init_time);
+
+					info_item->transfer.elapsed_seconds = pv_elapsedtime_seconds(&transfer_elapsed);
+				}
 
 				/*
-				 * Calculate the effective start time: the time we actually
+				 * Now display the information about the fd.
-				 * started, plus the total time we spent stopped.
 				 */
-				pv_elapsedtime_add(&init_time, &(info_item->start_time), &(state->signal.toffset));
-
-				/*
-				 * Now get the effective elapsed transfer time - current
-				 * time minus effective start time.
-				 */
-				pv_elapsedtime_subtract(&transfer_elapsed, &cur_time, &init_time);
-
-				info_item->transfer.elapsed_seconds = pv_elapsedtime_seconds(&transfer_elapsed);
 
 				if (displayed_lines > 0) {
 					debug("%s", "adding newline");
@@ -1030,15 +1087,15 @@ int pv_watchfd_loop(pvstate_t state)
 
 				debug("%s %d, %s %d [%d/%d]: %Lf / %Ld", "pid", (int) (info_item->watch_pid), "fd",
 				      info_item->watch_fd, watch_idx, info_idx, info_item->transfer.elapsed_seconds,
-				      position_now);
+				      info_item->position);
 
 				if (terminal_resized) {
 					pv_watchpid_setname(state, info_item);
 					info_item->flags.reparse_display = 1;
 				}
 
-				info_item->transfer.transferred = position_now;
+				info_item->transfer.transferred = info_item->position;
-				info_item->transfer.total_written = position_now;
+				info_item->transfer.total_written = info_item->position;
 				state->control.name = info_item->display_name;
 				state->control.size = info_item->size;
 
@@ -1099,25 +1156,16 @@ int pv_watchfd_loop(pvstate_t state)
 		}
 	}
 
-	if (!state->control.numeric)
+	if (!state->control.numeric) {
-		pv_tty_write(&(state->flags), "\n", 1);
+		/*
-
+		 * Move the cursor past the displayed lines, so the last
-	/*
+		 * output stays on the screen and isn't overwritten by the
-	 * Clean up our displayed lines after the display loop.
+		 * command prompt (#81).
-	 */
+		 */
-	blank_lines = prev_displayed_lines;
+		while (prev_displayed_lines > 0) {
-	while (blank_lines > 0) {
-		pvdisplay_width_t blank_count;
-		for (blank_count = 0; blank_count < state->control.width; blank_count++)
-			pv_tty_write(&(state->flags), " ", 1);
-		pv_tty_write(&(state->flags), "\r", 1);
-		blank_lines--;
-		if (blank_lines > 0)
 			pv_tty_write(&(state->flags), "\n", 1);
-	}
+			prev_displayed_lines--;
-	while (prev_displayed_lines > 1) {
+		}
-		pv_tty_write(&(state->flags), "\033[A", 3);
-		prev_displayed_lines--;
 	}
 
 	/*

src/pv/state.c

@@ -131,6 +131,7 @@ void pv_reset_transfer(pvtransferstate_t transfer)
 	transfer->line_positions_length = 0;
 	transfer->line_positions_head = 0;
 	transfer->last_output_position = 0;
+	transfer->output_not_seekable = false;
 }
 
 
@@ -256,6 +257,38 @@ void pv_freecontents_calc(pvtransfercalc_t calc)
 }
 
 
+/*
+ * Truncate the output file descriptor to its current position, if it's a
+ * valid fd, we're in sparse output mode, and no lseek() failed.
+ */
+static void pv_truncate_output(pvstate_t state)
+{
+	off_t current_offset;
+
+	if (!state->control.sparse_output)
+		return;
+	if (state->transfer.output_not_seekable)
+		return;
+	if (state->control.output_fd < 0)
+		return;
+
+	current_offset = (off_t) lseek(state->control.output_fd, (off_t) 0, SEEK_CUR);
+	if (current_offset == (off_t) - 1)
+		return;
+
+	debug("%s: %ld", "truncating to current offset", (long) current_offset);
+
+	/*@+longintegral@ */
+	/*
+	 * splint has trouble with off_t / __off_t.
+	 */
+	if (0 != ftruncate(state->control.output_fd, current_offset)) {
+		debug("%s: %s", "output ftruncate() failed", strerror(errno));
+	}
+	/*@-longintegral@ */
+}
+
+
 /*
  * Free a state structure, after which it can no longer be used.
  */
@@ -269,6 +302,7 @@ void pv_state_free(pvstate_t state)
 	 * still know the program name and output filename.
 	 */
 	if (state->control.output_fd >= 0) {
+		pv_truncate_output(state);
 		if (STDOUT_FILENO != state->control.output_fd) {
 			if (close(state->control.output_fd) < 0) {
 				pv_error("%s: %s",
@@ -494,6 +528,11 @@ void pv_state_direct_io_set(pvstate_t state, bool val)
 	state->control.direct_io_changed = true;
 }
 
+void pv_state_sparse_output_set(pvstate_t state, bool val)
+{
+	state->control.sparse_output = val;
+}
+
 void pv_state_discard_input_set(pvstate_t state, bool val)
 {
 	state->control.discard_input = val;
@@ -625,6 +664,7 @@ void pv_state_output_set(pvstate_t state, int fd, const char *name)
 	 * Close any previous output file first, so we can report any errors
 	 * before we store the new output filename.
 	 */
+	pv_truncate_output(state);
 	if (state->control.output_fd >= 0 && state->control.output_fd != STDOUT_FILENO) {
 		if (close(state->control.output_fd) < 0) {
 			pv_error("%s: %s",
@@ -645,6 +685,22 @@ void pv_state_output_set(pvstate_t state, int fd, const char *name)
 	 */
 	fcntl(state->control.output_fd, F_SETFL, O_NONBLOCK | fcntl(state->control.output_fd, F_GETFL));
 #endif				/* MAKE_OUTPUT_NONBLOCKING */
+
+	/*
+	 * In sparse output mode, if the output is in append mode (>>),
+	 * explicitly lseek() to the end of the file.  Otherwise, the file
+	 * offset is not set until the first write(), which means that if
+	 * the input starts with null bytes, when we lseek() past them
+	 * relative to the current position, the "current position" is 0
+	 * rather than the end of the file, and the file gets truncated on
+	 * exit to the wrong size.
+	 */
+	if (state->control.sparse_output && 0 != (fcntl(fd, F_GETFL) & O_APPEND)) {
+		debug("%s", "sparse output mode, and appending - seeking output to the end");
+		if ((off_t) lseek(fd, 0, SEEK_END) == (off_t) - 1) {
+			debug("%s: %s", "lseek failed", strerror(errno));
+		}
+	}
 }
 
 void pv_state_average_rate_window_set(pvstate_t state, unsigned int val)

src/pv/transfer.c

@@ -655,6 +655,9 @@ static int pv__transfer_write(pvstate_t state, bool *eof_in, bool *eof_out, long
 {
 	ssize_t nwritten;
 	int write_errno;
+	bool all_nulls;
+	off_t output_offset;
+	size_t write_check_position, write_end_position;
 
 	if (NULL == state->transfer.transfer_buffer) {
 		pv_error("%s", _("no transfer buffer allocated"));
@@ -671,6 +674,52 @@ static int pv__transfer_write(pvstate_t state, bool *eof_in, bool *eof_out, long
 		nwritten = state->transfer.to_write;
 	} else if (state->transfer.to_write > 0) {
 
+		/*
+		 * In sparse output mode, check whether all of the bytes to
+		 * be written are null, and if so, try to seek the output
+		 * instead of writing the null bytes.
+		 */
+		if (state->control.sparse_output && !state->transfer.output_not_seekable) {
+			write_check_position = state->transfer.write_position;
+			write_end_position = write_check_position + (size_t) (state->transfer.to_write);
+			all_nulls = true;
+			while (all_nulls && write_check_position < write_end_position) {
+				if ('\0' == state->transfer.transfer_buffer[write_check_position]) {
+					write_check_position++;
+				} else {
+					all_nulls = false;
+				}
+			}
+			if (all_nulls) {
+
+				/*
+				 * Use lseek() to move forward in the file,
+				 * and then ftruncate() it to its new size.
+				 *
+				 * If any step fails, mark the output not
+				 * seekable so we stop trying.
+				 */
+
+				/*@+longintegral@ */
+				/*
+				 * splint has trouble with off_t / __off_t, in the lseek() call.
+				 */
+				output_offset =
+				    lseek(state->control.output_fd, (off_t) (state->transfer.to_write), SEEK_CUR);
+				if (output_offset == (off_t) - 1) {
+					debug("%s: %s", "output lseek() failed", strerror(errno));
+					state->transfer.output_not_seekable = true;
+				} else {
+					/* Seek successful - skip write. */
+					debug("%s (%ld) -> %s: %ld", "skipped null writes",
+					      (long) (state->transfer.to_write), "new position", (long) output_offset);
+					nwritten = state->transfer.to_write;
+					goto pv__transfer_write_completed;
+				}
+				/*@-longintegral@ */
+			}
+		}
+
 		/*
 		 * Set an interval timer or an alarm to interrupt the write
 		 * with a signal if the write takes too long, so we can
@@ -735,6 +784,9 @@ static int pv__transfer_write(pvstate_t state, bool *eof_in, bool *eof_out, long
 #endif				/* HAVE_SETITIMER */
 	}
 
+      pv__transfer_write_completed:
+	/* If lseek() worked for sparse output, it jumps down here. */
+
 	if (nwritten > 0) {
 		bool tracking_lines = false;
 

src/pv/watchpid.c

@@ -418,7 +418,7 @@ static int pv_compare_watchfd(const void *a, const void *b)
 
 /*
  * Scan the given process and update the arrays with any new file
- * descriptors.  If "watch_fd" is not -1, then all other file descriptors
+ * descriptors.  If "watch_fd" is not -1, then all other file descriptor
  * numbers will be ignored,
  *
  * Returns 0 on success, 1 if the process no longer exists or could not be
@@ -494,6 +494,16 @@ int pv_watchpid_scanfds(pvstate_t state, pid_t watch_pid, int watch_fd, int *arr
 				continue;
 			if (info_array[check_idx].watch_fd != fd)
 				continue;
+			if (info_array[check_idx].closed) {
+				/*
+				 * If the fd is known but closed,
+				 * immediately free it for re-use.
+				 */
+				info_array[check_idx].unused = true;
+				info_array[check_idx].displayable = false;
+				pv_freecontents_watchfd(&(info_array[check_idx]));
+				continue;
+			}
 			found_idx = check_idx;
 			break;
 		}
@@ -534,6 +544,7 @@ int pv_watchpid_scanfds(pvstate_t state, pid_t watch_pid, int watch_fd, int *arr
 		pv_reset_watchfd(&(info_array[use_idx]));
 		info_array[use_idx].watch_pid = watch_pid;
 		info_array[use_idx].watch_fd = fd;
+		info_array[use_idx].closed = false;
 		info_array[use_idx].unused = false;
 		info_array[use_idx].displayable = true;
 

tests/Sparse_-_Basic.test

@@ -0,0 +1,89 @@
+#!/bin/sh
+#
+# Transfer a large chunk of data through pv using pipes, sending it in a
+# bursty fashion, and make sure some of it consists of blocks of null bytes. 
+# Check data correctness afterwards, and if dd can produce a sparse file,
+# check that pv's output is also sparse.
+
+# Allow all tests to be skipped, e.g. during a release build
+test "${SKIP_ALL_TESTS}" = "1" && exit 77
+
+true "${testSubject:?not set - call this from 'make check'}"
+true "${workFile1:?not set - call this from 'make check'}"
+true "${workFile2:?not set - call this from 'make check'}"
+true "${workFile3:?not set - call this from 'make check'}"
+
+# generate some data, with a hole in the middle.
+dd if=/dev/urandom of="${workFile1}" bs=4096 count=640 2>/dev/null
+dd if=/dev/null of="${workFile1}" bs=4096 count=0 seek=1280 2>/dev/null
+dd if=/dev/urandom of="${workFile1}" bs=4096 count=1280 seek=1280 2>/dev/null
+
+# check that sparse files are supported.
+cat < "${workFile1}" > "${workFile3}"
+inputBlocks="$(ls -1s "${workFile1}" | awk '{print $1}')"
+nonSparseBlocks="$(ls -1s "${workFile3}" | awk '{print $1}')"
+if test "${inputBlocks}" -eq "${nonSparseBlocks}"; then
+	echo 'sparse files not supported'
+	exit 77
+fi
+
+inputChecksum=$(cksum "${workFile1}" | awk '{print $1}')
+
+# read through pv and test afterwards
+(
+dd if="${workFile1}" bs=1 count=9000
+sleep 1
+dd if="${workFile1}" bs=1 skip=9000 count=1240
+sleep 1
+dd if="${workFile1}" bs=1024 skip=10 count=1014
+sleep 1
+dd if="${workFile1}" bs=1024 skip=1024 count=1024
+sleep 1
+dd if="${workFile1}" bs=1024 skip=2048
+) 2>/dev/null | "${testSubject}" -q -O -L 2M | cat > "${workFile2}"
+
+outputChecksum=$(cksum "${workFile2}" | awk '{print $1}')
+
+if ! test "${inputChecksum}" = "${outputChecksum}"; then
+	echo "checksum mismatch with dd | pv | cat"
+	exit 1
+fi
+
+# same again but with one less pipe
+(
+dd if="${workFile1}" bs=1 count=9000
+sleep 1
+dd if="${workFile1}" bs=1 skip=9000 count=1240
+sleep 1
+dd if="${workFile1}" bs=1024 skip=10 count=1014
+sleep 1
+dd if="${workFile1}" bs=1024 skip=1024 count=1024
+sleep 1
+dd if="${workFile1}" bs=1024 skip=2048
+) 2>/dev/null | "${testSubject}" -q -O -L 2M > "${workFile2}"
+
+outputChecksum=$(cksum "${workFile2}" | awk '{print $1}')
+
+if ! test "${inputChecksum}" = "${outputChecksum}"; then
+	echo "checksum mismatch with dd | pv > file"
+	exit 1
+fi
+
+outputBlocks="$(ls -1s "${workFile2}" | awk '{print $1}')"
+
+# Note that we only check that the output has any holes at all (and that the
+# input had holes).  We don't compare pv's output with dd's output directly,
+# because the exact number of holes might differ intermittently.
+
+if test "${nonSparseBlocks}" -gt "${inputBlocks}" && ! test "${outputBlocks}" -lt "${nonSparseBlocks}"; then
+	echo "output is not sparse"
+	echo "input file:"
+	ls -ls "${workFile1}"
+	echo "output file:"
+	ls -ls "${workFile2}"
+	echo "input file without holes:"
+	ls -ls "${workFile3}"
+	exit 1
+fi
+
+exit 0