281e03ec6c
Also, fix an unlikely read overflow in sys_exec_setmtime_script. * src/buffer.c (open_compressed_archive): * src/compare.c (verify_volume): * src/exclist.c (info_attach_exclist): * src/misc.c (xfork): * src/sparse.c (sparse_scan_file_seek): * src/system.c (sys_wait_for_child, sys_spawn_shell) (wait_for_grandchild, sys_wait_command, sys_exec_info_script) (sys_exec_checkpoint_script, sys_exec_setmtime_script): * src/transform.c (_single_transform_name_to_obstack): * src/xattrs.c (xattrs__acls_set, xattrs_acls_get) (xattrs_xattrs_get, xattrs__fd_set, xattrs_selinux_get) (xattrs_selinux_set): * tests/checkseekhole.c (check_seek_hole, main): Simplify failure tests by just looking at return value sign. * src/system.c (sys_exec_setmtime_script): Don’t assume ‘read’ result fits in int. (sys_exec_setmtime_script): Don’t reject 1 second before Epoch.
93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
/* Test suite for GNU tar - SEEK_HOLE detector.
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Copyright 2015-2024 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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Description: detect whether it is possible to work with SEEK_HOLE on
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particular operating system and file system. */
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#include "config.h"
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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enum {
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EX_OK = 0, /* SEEK_HOLE support */
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EX_FAIL, /* test failed - no SEEK_HOLE support */
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EX_BAD, /* test is not relevant */
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};
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int
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check_seek_hole (int fd)
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{
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#ifdef SEEK_HOLE
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struct stat stat;
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off_t offset;
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/* hole of 100MB */
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if (lseek (fd, 100*1024*1024, SEEK_END) < 0)
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return EX_BAD;
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/* piece of data */
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if (write (fd, "data\n", 5) != 5)
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return EX_BAD;
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/* another hole */
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if (lseek (fd, 100*1024*1024, SEEK_END) < 0)
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return EX_BAD;
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/* piece of data */
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if (write (fd, "data\n", 5) != 5)
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return EX_BAD;
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if (fstat (fd, &stat))
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return EX_BAD;
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offset = lseek (fd, 0, SEEK_DATA);
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if (offset < 0)
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return EX_FAIL;
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offset = lseek (fd, offset, SEEK_HOLE);
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if (offset < 0 || offset == stat.st_size)
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return EX_FAIL;
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return EX_OK;
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#else
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return EX_BAD;
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#endif
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}
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int
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main ()
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{
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#ifdef SEEK_HOLE
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int rc;
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char template[] = "testseekhole-XXXXXX";
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int fd = mkstemp (template);
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if (fd < 0)
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return EX_BAD;
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rc = check_seek_hole (fd);
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close (fd);
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unlink (template);
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return rc;
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#else
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return EX_FAIL;
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#endif
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}
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