*/
static char const *const license_msg[] = {
-"Copyright (C) 2017 Free Software Foundation, Inc.",
+"Copyright (C) 2018 Free Software Foundation, Inc.",
"Copyright (C) 1993 Jean-loup Gailly.",
"This is free software. You may redistribute copies of it under the terms of",
"the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.",
off_t lseek (int fd, off_t offset, int whence);
#endif
-#ifndef OFF_T_MAX
-# define OFF_T_MAX TYPE_MAXIMUM (off_t)
-#endif
-
-/* Use SA_NOCLDSTOP as a proxy for whether the sigaction machinery is
- present. */
-#ifndef SA_NOCLDSTOP
-# define SA_NOCLDSTOP 0
-# define sigprocmask(how, set, oset) /* empty */
-# define sigset_t int
-# if ! HAVE_SIGINTERRUPT
-# define siginterrupt(sig, flag) /* empty */
-# endif
-#endif
-
#ifndef HAVE_WORKING_O_NOFOLLOW
# define HAVE_WORKING_O_NOFOLLOW 0
#endif
suppresses a "Broken Pipe" message with some shells. */
static int volatile exiting_signal;
-/* If nonnegative, close this file descriptor and unlink ofname on error. */
+/* If nonnegative, close this file descriptor and unlink remove_ofname
+ on error. */
static int volatile remove_ofname_fd = -1;
+static char volatile remove_ofname[MAX_PATH_LEN];
static bool stdin_was_read;
local int check_ofname (void);
local void copy_stat (struct stat *ifstat);
local void install_signal_handlers (void);
-local void remove_output_file (void);
-local RETSIGTYPE abort_gzip_signal (int);
+static void remove_output_file (bool);
+static void abort_gzip_signal (int);
local noreturn void do_exit (int exitcode);
static void finish_out (void);
int main (int argc, char **argv);
&& errno != EBADF)
write_error ();
do_exit(exit_code);
- return exit_code; /* just to avoid lint warning */
}
/* Return nonzero when at end of file on input. */
return 0;
}
+static void
+get_input_size_and_time (void)
+{
+ ifile_size = -1;
+ time_stamp.tv_nsec = -1;
+
+ /* Record the input file's size and timestamp only if it is a
+ regular file. Doing this for the timestamp helps to keep gzip's
+ output more reproducible when it is used as part of a
+ pipeline. */
+
+ if (S_ISREG (istat.st_mode))
+ {
+ ifile_size = istat.st_size;
+ if (!no_time || list)
+ time_stamp = get_stat_mtime (&istat);
+ }
+}
+
/* ========================================================================
* Compress or decompress stdin
*/
progerror ("standard input");
do_exit (ERROR);
}
- ifile_size = S_ISREG (istat.st_mode) ? istat.st_size : -1;
- time_stamp.tv_nsec = -1;
- if (!no_time || list)
- {
- if (S_ISREG (istat.st_mode))
- time_stamp = get_stat_mtime (&istat);
- else
- gettime (&time_stamp);
- }
+
+ get_input_size_and_time ();
clear_bufs(); /* clear input and output buffers */
to_stdout = 1;
}
}
- ifile_size = S_ISREG (istat.st_mode) ? istat.st_size : -1;
- time_stamp.tv_nsec = -1;
- if (!no_time || list)
- time_stamp = get_stat_mtime (&istat);
+ get_input_size_and_time ();
/* Generate output file name. For -r and (-t or -l), skip files
* without a valid gzip suffix (check done in make_ofname).
if (method == -1) {
if (!to_stdout)
- remove_output_file ();
+ remove_output_file (false);
return;
}
}
}
+static void
+volatile_strcpy (char volatile *dst, char const volatile *src)
+{
+ while ((*dst++ = *src++))
+ continue;
+}
+
/* ========================================================================
* Create the output file. Return OK or ERROR.
* Try several times if necessary to avoid truncating the z_suffix. For
int open_errno;
sigset_t oldset;
+ volatile_strcpy (remove_ofname, ofname);
+
sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
remove_ofname_fd = ofd = openat (atfd, base, flags, S_IRUSR | S_IWUSR);
open_errno = errno;
"lzh ", /* 3 */
"", "", "", "", /* 4 to 7 reserved */
"defla"}; /* 8 */
- int positive_off_t_width = 1;
- off_t o;
-
- for (o = OFF_T_MAX; 9 < o; o /= 10) {
- positive_off_t_width++;
- }
+ int positive_off_t_width = INT_STRLEN_BOUND (off_t) - 1;
if (first_time && method >= 0) {
first_time = 0;
the file and NAME its name. Change it to user UID and to group GID.
If UID or GID is -1, though, do not change the corresponding user
or group. */
+#if ! (HAVE_FCHOWN || HAVE_CHOWN)
+/* The types uid_t and gid_t do not exist on mingw, so don't assume them. */
+# define do_chown(fd, name, uid, gid) ((void) 0)
+#else
static void
do_chown (int fd, char const *name, uid_t uid, gid_t gid)
{
-#ifndef NO_CHOWN
# if HAVE_FCHOWN
ignore_value (fchown (fd, uid, gid));
# else
ignore_value (chown (name, uid, gid));
# endif
-#endif
}
+#endif
/* ========================================================================
* Copy modes, times, ownership from input file to output file.
{
int nsigs = sizeof handled_sig / sizeof handled_sig[0];
int i;
-
-#if SA_NOCLDSTOP
struct sigaction act;
sigemptyset (&caught_signals);
foreground = 1;
sigaction (handled_sig[i], &act, NULL);
}
-#else
- for (i = 0; i < nsigs; i++)
- if (signal (handled_sig[i], SIG_IGN) != SIG_IGN)
- {
- if (i == 0)
- foreground = 1;
- signal (handled_sig[i], abort_gzip_signal);
- siginterrupt (handled_sig[i], 1);
- }
-#endif
}
/* ========================================================================
* Close and unlink the output file.
*/
static void
-remove_output_file ()
+remove_output_file (bool signals_already_blocked)
{
int fd;
sigset_t oldset;
- sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
+ if (!signals_already_blocked)
+ sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
fd = remove_ofname_fd;
if (0 <= fd)
{
+ char fname[MAX_PATH_LEN];
remove_ofname_fd = -1;
close (fd);
- xunlink (ofname);
+ volatile_strcpy (fname, remove_ofname);
+ xunlink (fname);
}
- sigprocmask (SIG_SETMASK, &oldset, NULL);
+ if (!signals_already_blocked)
+ sigprocmask (SIG_SETMASK, &oldset, NULL);
}
/* ========================================================================
* Error handler.
*/
void
-abort_gzip ()
+abort_gzip (void)
{
- remove_output_file ();
+ remove_output_file (false);
do_exit(ERROR);
}
/* ========================================================================
* Signal handler.
*/
-static RETSIGTYPE
-abort_gzip_signal (sig)
- int sig;
+static void
+abort_gzip_signal (int sig)
{
- if (! SA_NOCLDSTOP)
- signal (sig, SIG_IGN);
- remove_output_file ();
+ remove_output_file (true);
if (sig == exiting_signal)
_exit (WARNING);
signal (sig, SIG_DFL);
projects / debian / gzip / blobdiff