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Don't filter time stamps through the resolution supported

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by struct stat; keep them to full nanosecond resolution.
This affects behavior only on older hosts or file systems
that have lower-resolution time stamps.
* src/common.h (OLDER_STAT_TIME): Parenthesize arg.
(OLDER_TAR_STAT_TIME): New macro.
(code_timespec): New function.
(BILLION, LOG10_BILLION, TIMESPEC_STRSIZE_BOUND): New constants.
* src/compare.c (diff_file): Use full time stamp resolution.
* src/create.c (start_header, dump_file0): Likewise.
(start_header, dump_file0): Adjust to new structure layout.
(dump_regular_finish): Simplify by using timespec_cmp.
* src/extract.c (struct delayed_set_stat): Don't store stat info
that we don't need, to save space.  All uses changed.
(struct delayed_set_stat, struct delayed_link, file_newer_p):
(create_placeholder_file, extract_link, apply_delayed_links):
Use full time stamp resolution.
(check_time): Use code_timespec rather than rolling our own code.
(set_stat, delay_set_stat): Arg now points to tar_stat_info to
avoid losing time information.  All callers changed.
* src/list.c (read_and, decode_header, print_heaeder):
Use full time stamp resolution.
* src/misc.c (code_timespec): New function.
* src/tar.h (struct tar_stat_info): Record atime, mtime, ctime
separately, for benefit of hosts with lower resolution.
* src/update.c (update_archive): Use full time stamp resolution.
* src/xheader.c (code_time): Use new code_timespec function
to simplify code.
(atime_coder, atime_decoder, ctime_coder, ctime_decoder):
(mtime_coder, mtime_decoder): Use full time stamp resolution.

Report time stamps to full resolution in environment.
Report memory allocation failures rather than ignoring them.
* src/system.c (time_to_env): New function.
(oct_to_env, str_to_env, chr_to_env): Report memory allocation failures.
(stat_to_env): Report full resolution in time stamps.
This commit is contained in:
Paul Eggert
2005-09-17 06:41:55 +00:00
parent 2f800ce3fb
commit 3209329337
11 changed files with 207 additions and 115 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
ChangeLog
View File

@@ -1,3 +1,42 @@
2005-09-16 Paul Eggert <eggert@cs.ucla.edu>
Don't filter time stamps through the resolution supported
by struct stat; keep them to full nanosecond resolution.
This affects behavior only on older hosts or file systems
that have lower-resolution time stamps.
* src/common.h (OLDER_STAT_TIME): Parenthesize arg.
(OLDER_TAR_STAT_TIME): New macro.
(code_timespec): New function.
(BILLION, LOG10_BILLION, TIMESPEC_STRSIZE_BOUND): New constants.
* src/compare.c (diff_file): Use full time stamp resolution.
* src/create.c (start_header, dump_file0): Likewise.
(start_header, dump_file0): Adjust to new structure layout.
(dump_regular_finish): Simplify by using timespec_cmp.
* src/extract.c (struct delayed_set_stat): Don't store stat info
that we don't need, to save space. All uses changed.
(struct delayed_set_stat, struct delayed_link, file_newer_p):
(create_placeholder_file, extract_link, apply_delayed_links):
Use full time stamp resolution.
(check_time): Use code_timespec rather than rolling our own code.
(set_stat, delay_set_stat): Arg now points to tar_stat_info to
avoid losing time information. All callers changed.
* src/list.c (read_and, decode_header, print_heaeder):
Use full time stamp resolution.
* src/misc.c (code_timespec): New function.
* src/tar.h (struct tar_stat_info): Record atime, mtime, ctime
separately, for benefit of hosts with lower resolution.
* src/update.c (update_archive): Use full time stamp resolution.
* src/xheader.c (code_time): Use new code_timespec function
to simplify code.
(atime_coder, atime_decoder, ctime_coder, ctime_decoder):
(mtime_coder, mtime_decoder): Use full time stamp resolution.
Report time stamps to full resolution in environment.
Report memory allocation failures rather than ignoring them.
* src/system.c (time_to_env): New function.
(oct_to_env, str_to_env, chr_to_env): Report memory allocation failures.
(stat_to_env): Report full resolution in time stamps.
2005-09-16 Paul Eggert <eggert@cs.ucla.edu>
Merge changes from gnulib for file system sub-second time stamps.

10
src/common.h
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@@ -189,7 +189,11 @@ GLOBAL struct timespec newer_mtime_option;
/* Return true if the struct stat ST's M time is less than
newer_mtime_option. */
#define OLDER_STAT_TIME(st, m) \
(timespec_cmp (get_stat_##m##time (&st), newer_mtime_option) < 0)
(timespec_cmp (get_stat_##m##time (&(st)), newer_mtime_option) < 0)
/* Likewise, for struct tar_stat_info ST. */
#define OLDER_TAR_STAT_TIME(st, m) \
(timespec_cmp ((st).m##time, newer_mtime_option) < 0)
/* Zero if there is no recursion, otherwise FNM_LEADING_DIR. */
GLOBAL int recursion_option;
@@ -490,6 +494,10 @@ char *quote_copy_string (const char *);
int unquote_string (char *);
void code_ns_fraction (int, char *);
char const *code_timespec (struct timespec, char *);
enum { BILLION = 1000000000, LOG10_BILLION = 9 };
enum { TIMESPEC_STRSIZE_BOUND =
UINTMAX_STRSIZE_BOUND + LOG10_BILLION + sizeof "-." - 1 };
size_t dot_dot_prefix_len (char const *);

2
src/compare.c
View File

@@ -224,7 +224,7 @@ diff_file (void)
if (!sys_compare_gid (&stat_data, &current_stat_info.stat))
report_difference (&current_stat_info, _("Gid differs"));
if (stat_data.st_mtime != current_stat_info.stat.st_mtime)
if (timespec_cmp (get_stat_mtime (&stat_data), current_stat_info.mtime))
report_difference (&current_stat_info, _("Mod time differs"));
if (current_header->header.typeflag != GNUTYPE_SPARSE &&
stat_data.st_size != current_stat_info.stat.st_size)

23
src/create.c
View File

@@ -353,7 +353,7 @@ string_to_chars (char const *str, char *p, size_t s)
/* A file is considered dumpable if it is sparse and both --sparse and --totals
are specified.
Otherwise, it is dumpable unless any of the following conditions occur:
a) it is empty *and* world-readable, or
b) current archive is /dev/null */
@@ -698,7 +698,7 @@ start_header (struct tar_stat_info *st)
}
{
struct timespec mtime = get_stat_mtime (&st->stat);
struct timespec mtime = st->mtime;
if (archive_format == POSIX_FORMAT)
{
if (MAX_OCTAL_VAL (header->header.mtime) < mtime.tv_sec
@@ -747,8 +747,8 @@ start_header (struct tar_stat_info *st)
else if (incremental_option)
if (archive_format == OLDGNU_FORMAT || archive_format == GNU_FORMAT)
{
TIME_TO_CHARS (st->stat.st_atime, header->oldgnu_header.atime);
TIME_TO_CHARS (st->stat.st_ctime, header->oldgnu_header.ctime);
TIME_TO_CHARS (st->atime.tv_sec, header->oldgnu_header.atime);
TIME_TO_CHARS (st->ctime.tv_sec, header->oldgnu_header.ctime);
}
header->header.typeflag = archive_format == V7_FORMAT ? AREGTYPE : REGTYPE;
@@ -954,9 +954,8 @@ dump_regular_finish (int fd, struct tar_stat_info *st,
{
stat_diag (st->orig_file_name);
}
else if (final_stat.st_ctime != original_ctime.tv_sec
|| (get_stat_ctime (&final_stat).tv_nsec
!= original_ctime.tv_nsec))
else if (timespec_cmp (get_stat_ctime (&final_stat), original_ctime)
!= 0)
{
WARN ((0, 0, _("%s: file changed as we read it"),
quotearg_colon (st->orig_file_name)));
@@ -1408,9 +1407,9 @@ dump_file0 (struct tar_stat_info *st, char *p,
return;
}
st->archive_file_size = st->stat.st_size;
original_ctime = get_stat_ctime (&st->stat);
restore_times[0] = get_stat_atime (&st->stat);
restore_times[1] = get_stat_mtime (&st->stat);
st->atime = restore_times[0] = get_stat_atime (&st->stat);
st->mtime = restore_times[1] = get_stat_mtime (&st->stat);
st->ctime = original_ctime = get_stat_ctime (&st->stat);
#ifdef S_ISHIDDEN
if (S_ISHIDDEN (st->stat.st_mode))
@@ -1433,8 +1432,8 @@ dump_file0 (struct tar_stat_info *st, char *p,
if (!(incremental_option && !is_individual_file (p))
&& !S_ISDIR (st->stat.st_mode)
&& OLDER_STAT_TIME (st->stat, m)
&& (!after_date_option || OLDER_STAT_TIME (st->stat, c)))
&& OLDER_TAR_STAT_TIME (*st, m)
&& (!after_date_option || OLDER_TAR_STAT_TIME (*st, c)))
{
if (!incremental_option && verbose_option)
WARN ((0, 0, _("%s: file is unchanged; not dumped"),

121
src/extract.c
View File

@@ -57,7 +57,13 @@ enum permstatus
struct delayed_set_stat
{
struct delayed_set_stat *next;
struct stat stat_info;
dev_t dev;
ino_t ino;
mode_t mode;
uid_t uid;
gid_t gid;
struct timespec atime;
struct timespec mtime;
size_t file_name_len;
mode_t invert_permissions;
enum permstatus permstatus;
@@ -76,7 +82,7 @@ struct delayed_link
/* The device, inode number and last-modified time of the placeholder. */
dev_t dev;
ino_t ino;
time_t mtime;
struct timespec mtime;
/* True if the link is symbolic. */
bool is_symlink;
@@ -206,23 +212,23 @@ check_time (char const *file_name, struct timespec t)
gettime (&now);
if (timespec_cmp (now, t) < 0)
{
unsigned long int ds = t.tv_sec - now.tv_sec;
int dns = t.tv_nsec - now.tv_nsec;
char dnsbuf[sizeof ".FFFFFFFFF"];
if (dns < 0)
char buf[TIMESPEC_STRSIZE_BOUND];
struct timespec diff;
diff.tv_sec = t.tv_sec - now.tv_sec;
diff.tv_nsec = t.tv_nsec - now.tv_nsec;
if (diff.tv_nsec < 0)
{
dns += 1000000000;
ds--;
diff.tv_nsec += BILLION;
diff.tv_sec--;
}
code_ns_fraction (dns, dnsbuf);
WARN ((0, 0, _("%s: time stamp %s is %lu%s s in the future"),
file_name, tartime (t, true), ds, dnsbuf));
WARN ((0, 0, _("%s: time stamp %s is %s s in the future"),
file_name, tartime (t, true), code_timespec (diff, buf)));
}
}
}
/* Restore stat attributes (owner, group, mode and times) for
FILE_NAME, using information given in *STAT_INFO.
FILE_NAME, using information given in *ST.
If CUR_INFO is nonzero, *CUR_INFO is the
file's currernt status.
If not restoring permissions, invert the
@@ -237,7 +243,7 @@ check_time (char const *file_name, struct timespec t)
static void
set_stat (char const *file_name,
struct stat const *stat_info,
struct tar_stat_info const *st,
struct stat const *cur_info,
mode_t invert_permissions, enum permstatus permstatus,
char typeflag)
@@ -256,8 +262,8 @@ set_stat (char const *file_name,
/* FIXME: incremental_option should set ctime too, but how? */
struct timespec ts[2];
ts[0] = incremental_option ? get_stat_atime (stat_info) : start_time;
ts[1] = get_stat_mtime (stat_info);
ts[0] = incremental_option ? st->atime : start_time;
ts[1] = st->mtime;
if (utimens (file_name, ts) != 0)
utime_error (file_name);
@@ -272,7 +278,7 @@ set_stat (char const *file_name,
done, it is not possible anymore to change file permissions, so we
have to set permissions prior to possibly giving files away. */
set_mode (file_name, stat_info, cur_info,
set_mode (file_name, &st->stat, cur_info,
invert_permissions, permstatus, typeflag);
}
@@ -286,48 +292,54 @@ set_stat (char const *file_name,
if (typeflag == SYMTYPE)
{
#if HAVE_LCHOWN
if (lchown (file_name, stat_info->st_uid, stat_info->st_gid) < 0)
if (lchown (file_name, st->stat.st_uid, st->stat.st_gid) < 0)
chown_error_details (file_name,
stat_info->st_uid, stat_info->st_gid);
st->stat.st_uid, st->stat.st_gid);
#endif
}
else
{
if (chown (file_name, stat_info->st_uid, stat_info->st_gid) < 0)
if (chown (file_name, st->stat.st_uid, st->stat.st_gid) < 0)
chown_error_details (file_name,
stat_info->st_uid, stat_info->st_gid);
st->stat.st_uid, st->stat.st_gid);
/* On a few systems, and in particular, those allowing to give files
away, changing the owner or group destroys the suid or sgid bits.
So let's attempt setting these bits once more. */
if (stat_info->st_mode & (S_ISUID | S_ISGID | S_ISVTX))
set_mode (file_name, stat_info, 0,
if (st->stat.st_mode & (S_ISUID | S_ISGID | S_ISVTX))
set_mode (file_name, &st->stat, 0,
invert_permissions, permstatus, typeflag);
}
}
}
/* Remember to restore stat attributes (owner, group, mode and times)
for the directory FILE_NAME, using information given in *STAT_INFO,
for the directory FILE_NAME, using information given in *ST,
once we stop extracting files into that directory.
If not restoring permissions, remember to invert the
INVERT_PERMISSIONS bits from the file's current permissions.
PERMSTATUS specifies the status of the file's permissions. */
static void
delay_set_stat (char const *file_name, struct stat const *stat_info,
delay_set_stat (char const *file_name, struct tar_stat_info const *st,
mode_t invert_permissions, enum permstatus permstatus)
{
size_t file_name_len = strlen (file_name);
struct delayed_set_stat *data =
xmalloc (offsetof (struct delayed_set_stat, file_name)
+ file_name_len + 1);
data->next = delayed_set_stat_head;
data->dev = st->stat.st_dev;
data->ino = st->stat.st_ino;
data->mode = st->stat.st_mode;
data->uid = st->stat.st_uid;
data->gid = st->stat.st_gid;
data->atime = st->atime;
data->mtime = st->mtime;
data->file_name_len = file_name_len;
strcpy (data->file_name, file_name);
data->invert_permissions = invert_permissions;
data->permstatus = permstatus;
data->after_links = 0;
data->stat_info = *stat_info;
data->next = delayed_set_stat_head;
strcpy (data->file_name, file_name);
delayed_set_stat_head = data;
}
@@ -352,7 +364,13 @@ repair_delayed_set_stat (char const *dir,
if (st.st_dev == dir_stat_info->st_dev
&& st.st_ino == dir_stat_info->st_ino)
{
data->stat_info = current_stat_info.stat;
data->dev = current_stat_info.stat.st_dev;
data->ino = current_stat_info.stat.st_ino;
data->mode = current_stat_info.stat.st_mode;
data->uid = current_stat_info.stat.st_uid;
data->gid = current_stat_info.stat.st_gid;
data->atime = current_stat_info.atime;
data->mtime = current_stat_info.mtime;
data->invert_permissions =
(MODE_RWX & (current_stat_info.stat.st_mode ^ st.st_mode));
data->permstatus = ARCHIVED_PERMSTATUS;
@@ -408,7 +426,7 @@ make_directories (char *file_name)
invert_permissions is zero, because
repair_delayed_set_stat may need to update the struct. */
delay_set_stat (file_name,
&current_stat_info.stat /* ignored */,
&current_stat_info /* ignored */,
invert_permissions, INTERDIR_PERMSTATUS);
print_for_mkdir (file_name, cursor - file_name, mode);
@@ -448,7 +466,7 @@ file_newer_p (const char *file_name, struct tar_stat_info *tar_stat)
return errno != ENOENT;
}
if (!S_ISDIR (st.st_mode)
&& st.st_mtime >= tar_stat->stat.st_mtime)
&& timespec_cmp (tar_stat->mtime, get_stat_mtime (&st)) <= 0)
{
return true;
}
@@ -551,8 +569,7 @@ apply_nonancestor_delayed_set_stat (char const *file_name, bool after_links)
stat_error (data->file_name);
skip_this_one = 1;
}
else if (! (st.st_dev == data->stat_info.st_dev
&& (st.st_ino == data->stat_info.st_ino)))
else if (! (st.st_dev == data->dev && st.st_ino == data->ino))
{
ERROR ((0, 0,
_("%s: Directory renamed before its status could be extracted"),
@@ -562,8 +579,16 @@ apply_nonancestor_delayed_set_stat (char const *file_name, bool after_links)
}
if (! skip_this_one)
set_stat (data->file_name, &data->stat_info, cur_info,
data->invert_permissions, data->permstatus, DIRTYPE);
{
struct tar_stat_info st;
st.stat.st_mode = data->mode;
st.stat.st_uid = data->uid;
st.stat.st_gid = data->gid;
st.atime = data->atime;
st.mtime = data->mtime;
set_stat (data->file_name, &st, cur_info,
data->invert_permissions, data->permstatus, DIRTYPE);
}
delayed_set_stat_head = data->next;
free (data);
@@ -627,7 +652,7 @@ extract_dir (char *file_name, int typeflag)
if (status == 0
|| old_files_option == DEFAULT_OLD_FILES
|| old_files_option == OVERWRITE_OLD_FILES)
delay_set_stat (file_name, &current_stat_info.stat,
delay_set_stat (file_name, &current_stat_info,
MODE_RWX & (mode ^ current_stat_info.stat.st_mode),
(status == 0
? ARCHIVED_PERMSTATUS
@@ -771,7 +796,7 @@ extract_file (char *file_name, int typeflag)
if (to_command_option)
sys_wait_command ();
else
set_stat (file_name, &current_stat_info.stat, 0, 0,
set_stat (file_name, &current_stat_info, NULL, 0,
(old_files_option == OVERWRITE_OLD_FILES ?
UNKNOWN_PERMSTATUS : ARCHIVED_PERMSTATUS),
typeflag);
@@ -815,7 +840,7 @@ create_placeholder_file (char *file_name, bool is_symlink, int *interdir_made)
delayed_link_head = p;
p->dev = st.st_dev;
p->ino = st.st_ino;
p->mtime = st.st_mtime;
p->mtime = get_stat_mtime (&st);
p->is_symlink = is_symlink;
if (is_symlink)
{
@@ -842,8 +867,8 @@ create_placeholder_file (char *file_name, bool is_symlink, int *interdir_made)
stat_error (h->file_name);
else
{
h->stat_info.st_dev = st.st_dev;
h->stat_info.st_ino = st.st_ino;
h->dev = st.st_dev;
h->ino = st.st_ino;
}
}
while ((h = h->next) && ! h->after_links);
@@ -879,7 +904,7 @@ extract_link (char *file_name, int typeflag)
for (; ds; ds = ds->next)
if (ds->dev == st1.st_dev
&& ds->ino == st1.st_ino
&& ds->mtime == st1.st_mtime)
&& timespec_cmp (ds->mtime, get_stat_mtime (&st1)) == 0)
{
struct string_list *p = xmalloc (offsetof (struct string_list, string)
+ strlen (file_name) + 1);
@@ -926,7 +951,7 @@ extract_symlink (char *file_name, int typeflag)
break;
if (status == 0)
set_stat (file_name, &current_stat_info.stat, 0, 0, 0, SYMTYPE);
set_stat (file_name, &current_stat_info, NULL, 0, 0, SYMTYPE);
else
symlink_error (current_stat_info.link_name, file_name);
return status;
@@ -958,7 +983,8 @@ extract_node (char *file_name, int typeflag)
if (status != 0)
mknod_error (file_name);
else
set_stat (file_name, &current_stat_info.stat, 0, 0, ARCHIVED_PERMSTATUS, typeflag);
set_stat (file_name, &current_stat_info, NULL, 0,
ARCHIVED_PERMSTATUS, typeflag);
return status;
}
#endif
@@ -975,7 +1001,7 @@ extract_fifo (char *file_name, int typeflag)
break;
if (status == 0)
set_stat (file_name, &current_stat_info.stat, NULL, 0,
set_stat (file_name, &current_stat_info, NULL, 0,
ARCHIVED_PERMSTATUS, typeflag);
else
mkfifo_error (file_name);
@@ -1217,7 +1243,7 @@ apply_delayed_links (void)
if (lstat (source, &st) == 0
&& st.st_dev == ds->dev
&& st.st_ino == ds->ino
&& st.st_mtime == ds->mtime)
&& timespec_cmp (get_stat_mtime (&st), ds->mtime) == 0)
{
/* Unlink the placeholder, then create a hard link if possible,
a symbolic link otherwise. */
@@ -1234,10 +1260,11 @@ apply_delayed_links (void)
symlink_error (ds->target, source);
else
{
struct tar_stat_info st1;
st1.stat.st_uid = ds->uid;
st1.stat.st_gid = ds->gid;
set_stat (source, &st1, NULL, 0, 0, SYMTYPE);
valid_source = source;
st.st_uid = ds->uid;
st.st_gid = ds->gid;
set_stat (source, &st, 0, 0, 0, SYMTYPE);
}
}
}

33
src/list.c
View File

@@ -99,8 +99,8 @@ read_and (void (*do_something) (void))
/* FIXME: Grab fractional time stamps from
extended header. */
mtime.tv_nsec = 0,
set_stat_mtime (&current_stat_info.stat, mtime),
OLDER_STAT_TIME (current_stat_info.stat, m)))
current_stat_info.mtime = mtime,
OLDER_TAR_STAT_TIME (current_stat_info, m)))
|| excluded_name (current_stat_info.file_name))
{
switch (current_header->header.typeflag)
@@ -243,7 +243,7 @@ list_archive (void)
}
if (multi_volume_option)
assign_string (&save_name, 0);
return;
}
@@ -512,9 +512,6 @@ decode_header (union block *header, struct tar_stat_info *stat_info,
enum archive_format *format_pointer, int do_user_group)
{
enum archive_format format;
struct timespec atime;
struct timespec ctime;
struct timespec mtime;
if (strcmp (header->header.magic, TMAGIC) == 0)
{
@@ -536,9 +533,8 @@ decode_header (union block *header, struct tar_stat_info *stat_info,
*format_pointer = format;
stat_info->stat.st_mode = MODE_FROM_HEADER (header->header.mode);
mtime.tv_sec = TIME_FROM_HEADER (header->header.mtime);
mtime.tv_nsec = 0;
set_stat_mtime (&stat_info->stat, mtime);
stat_info->mtime.tv_sec = TIME_FROM_HEADER (header->header.mtime);
stat_info->mtime.tv_nsec = 0;
assign_string (&stat_info->uname,
header->header.uname[0] ? header->header.uname : NULL);
assign_string (&stat_info->gname,
@@ -546,21 +542,18 @@ decode_header (union block *header, struct tar_stat_info *stat_info,
if (format == OLDGNU_FORMAT && incremental_option)
{
atime.tv_sec = TIME_FROM_HEADER (header->oldgnu_header.atime);
ctime.tv_sec = TIME_FROM_HEADER (header->oldgnu_header.ctime);
atime.tv_nsec = ctime.tv_nsec = 0;
stat_info->atime.tv_sec = TIME_FROM_HEADER (header->oldgnu_header.atime);
stat_info->ctime.tv_sec = TIME_FROM_HEADER (header->oldgnu_header.ctime);
stat_info->atime.tv_nsec = stat_info->ctime.tv_nsec = 0;
}
else if (format == STAR_FORMAT)
{
atime.tv_sec = TIME_FROM_HEADER (header->star_header.atime);
ctime.tv_sec = TIME_FROM_HEADER (header->star_header.ctime);
atime.tv_nsec = ctime.tv_nsec = 0;
stat_info->atime.tv_sec = TIME_FROM_HEADER (header->star_header.atime);
stat_info->ctime.tv_sec = TIME_FROM_HEADER (header->star_header.ctime);
stat_info->atime.tv_nsec = stat_info->ctime.tv_nsec = 0;
}
else
atime = ctime = start_time;
set_stat_atime (&stat_info->stat, atime);
set_stat_ctime (&stat_info->stat, ctime);
stat_info->atime = stat_info->ctime = start_time;
if (format == V7_FORMAT)
{
@@ -1094,7 +1087,7 @@ print_header (struct tar_stat_info *st, off_t block_ordinal)
/* Time stamp. */
time_stamp = tartime (get_stat_mtime (&st->stat), false);
time_stamp = tartime (st->mtime, false);
time_stamp_len = strlen (time_stamp);
if (datewidth < time_stamp_len)
datewidth = time_stamp_len;

21
src/misc.c
View File

@@ -239,6 +239,27 @@ code_ns_fraction (int ns, char *p)
}
}
}
char const *
code_timespec (struct timespec t, char sbuf[TIMESPEC_STRSIZE_BOUND])
{
time_t s = t.tv_sec;
int ns = t.tv_nsec;
char *np;
bool negative = s < 0;
if (negative && ns != 0)
{
s++;
ns = BILLION - ns;
}
np = umaxtostr (negative ? - (uintmax_t) s : (uintmax_t) s, sbuf + 1);
if (negative)
*--np = '-';
code_ns_fraction (ns, sbuf + UINTMAX_STRSIZE_BOUND);
return np;
}
/* File handling. */

28
src/system.c
View File

@@ -611,7 +611,16 @@ dec_to_env (char *envar, uintmax_t num)
char *numstr;
numstr = STRINGIFY_BIGINT (num, buf);
setenv (envar, numstr, 1);
if (setenv (envar, numstr, 1) != 0)
xalloc_die ();
}
static void
time_to_env (char *envar, struct timespec t)
{
char buf[TIMESPEC_STRSIZE_BOUND];
if (setenv (envar, code_timespec (t, buf), 1) != 0)
xalloc_die ();
}
static void
@@ -620,14 +629,18 @@ oct_to_env (char *envar, unsigned long num)
char buf[1+1+(sizeof(unsigned long)*CHAR_BIT+2)/3];
snprintf (buf, sizeof buf, "0%lo", num);
setenv (envar, buf, 1);
if (setenv (envar, buf, 1) != 0)
xalloc_die ();
}
static void
str_to_env (char *envar, char const *str)
{
if (str)
setenv (envar, str, 1);
{
if (setenv (envar, str, 1) != 0)
xalloc_die ();
}
else
unsetenv (envar);
}
@@ -638,7 +651,8 @@ chr_to_env (char *envar, char c)
char buf[2];
buf[0] = c;
buf[1] = 0;
setenv (envar, buf, 1);
if (setenv (envar, buf, 1) != 0)
xalloc_die ();
}
static void
@@ -650,9 +664,9 @@ stat_to_env (char *name, char type, struct tar_stat_info *st)
str_to_env ("TAR_REALNAME", st->file_name);
str_to_env ("TAR_UNAME", st->uname);
str_to_env ("TAR_GNAME", st->gname);
dec_to_env ("TAR_MTIME", st->stat.st_mtime);
dec_to_env ("TAR_ATIME", st->stat.st_atime);
dec_to_env ("TAR_CTIME", st->stat.st_ctime);
time_to_env ("TAR_ATIME", st->atime);
time_to_env ("TAR_MTIME", st->mtime);
time_to_env ("TAR_CTIME", st->ctime);
dec_to_env ("TAR_SIZE", st->stat.st_size);
dec_to_env ("TAR_UID", st->stat.st_uid);
dec_to_env ("TAR_GID", st->stat.st_gid);

6
src/tar.h
View File

@@ -281,6 +281,12 @@ struct tar_stat_info
char *gname; /* group name of owner */
struct stat stat; /* regular filesystem stat */
/* STAT doesn't always have access, data modification, and status
change times in a convenient form, so store them separately. */
struct timespec atime;
struct timespec mtime;
struct timespec ctime;
off_t archive_file_size; /* Size of file as stored in the archive.
Equals stat.st_size for non-sparse files */

6
src/update.c
View File

@@ -129,7 +129,7 @@ update_archive (void)
decode_header (current_header, &current_stat_info,
&current_format, 0);
archive_format = current_format;
if (subcommand_option == UPDATE_SUBCOMMAND
&& (name = name_scan (current_stat_info.file_name)) != NULL)
{
@@ -138,7 +138,9 @@ update_archive (void)
chdir_do (name->change_dir);
if (deref_stat (dereference_option,
current_stat_info.file_name, &s) == 0
&& s.st_mtime <= current_stat_info.stat.st_mtime)
&& (timespec_cmp (get_stat_mtime (&s),
current_stat_info.mtime)
<= 0))
add_avoided_name (current_stat_info.file_name);
}

33
src/xheader.c
View File

@@ -57,8 +57,6 @@ static size_t global_header_count;
However it should wait until buffer.c is finally rewritten */
enum { BILLION = 1000000000, LOG10_BILLION = 9 };
/* Keyword options */
@@ -747,23 +745,8 @@ decode_string (char **string, char const *arg)
static void
code_time (struct timespec t, char const *keyword, struct xheader *xhdr)
{
time_t s = t.tv_sec;
int ns = t.tv_nsec;
char sbuf[1/*"-"*/ + UINTMAX_STRSIZE_BOUND + 1/*"."*/ + LOG10_BILLION];
char *np;
bool negative = s < 0;
if (negative && ns != 0)
{
s++;
ns = BILLION - ns;
}
np = umaxtostr (negative ? - (uintmax_t) s : (uintmax_t) s, sbuf + 1);
if (negative)
*--np = '-';
code_ns_fraction (ns, sbuf + UINTMAX_STRSIZE_BOUND);
xheader_print (xhdr, keyword, np);
char buf[TIMESPEC_STRSIZE_BOUND];
xheader_print (xhdr, keyword, code_timespec (t, buf));
}
static bool
@@ -900,7 +883,7 @@ static void
atime_coder (struct tar_stat_info const *st, char const *keyword,
struct xheader *xhdr, void *data __attribute__ ((unused)))
{
code_time (get_stat_atime (&st->stat), keyword, xhdr);
code_time (st->atime, keyword, xhdr);
}
static void
@@ -908,7 +891,7 @@ atime_decoder (struct tar_stat_info *st, char const *arg)
{
struct timespec ts;
if (decode_time (&ts, arg, "atime"))
set_stat_atime (&st->stat, ts);
st->atime = ts;
}
static void
@@ -956,7 +939,7 @@ static void
ctime_coder (struct tar_stat_info const *st, char const *keyword,
struct xheader *xhdr, void *data __attribute__ ((unused)))
{
code_time (get_stat_ctime (&st->stat), keyword, xhdr);
code_time (st->ctime, keyword, xhdr);
}
static void
@@ -964,14 +947,14 @@ ctime_decoder (struct tar_stat_info *st, char const *arg)
{
struct timespec ts;
if (decode_time (&ts, arg, "ctime"))
set_stat_ctime (&st->stat, ts);
st->ctime = ts;
}
static void
mtime_coder (struct tar_stat_info const *st, char const *keyword,
struct xheader *xhdr, void *data __attribute__ ((unused)))
{
code_time (get_stat_mtime (&st->stat), keyword, xhdr);
code_time (st->mtime, keyword, xhdr);
}
static void
@@ -979,7 +962,7 @@ mtime_decoder (struct tar_stat_info *st, char const *arg)
{
struct timespec ts;
if (decode_time (&ts, arg, "mtime"))
set_stat_mtime (&st->stat, ts);
st->mtime = ts;
}
static void