/* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
- Copyright (C) 1999, 2001-2002, 2006-2007, 2009-2013 Free Software
+ Copyright (C) 1999, 2001-2002, 2006-2007, 2009-2018 Free Software
Foundation, Inc.
Copyright (C) 1992-1993 Jean-loup Gailly
*/
static char const *const license_msg[] = {
-"Copyright (C) 2007, 2010, 2011 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 <http://www.gnu.org/licenses/gpl.html>.",
+"the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.",
"There is NO WARRANTY, to the extent permitted by law.",
0};
* or stdout with -c option or if stdin used as input.
* If the output file name had to be truncated, the original name is kept
* in the compressed file.
- * On MSDOS, file.tmp -> file.tmz. On VMS, file.tmp -> file.tmp-gz.
+ * On MSDOS, file.tmp -> file.tmz.
*
* Using gz on MSDOS would create too many file name conflicts. For
* example, foo.txt -> foo.tgz (.tgz must be reserved as shorthand for
#include <sys/types.h>
#include <signal.h>
#include <stdbool.h>
+#include <stddef.h>
#include <sys/stat.h>
#include <errno.h>
-#include "closein.h"
#include "tailor.h"
#include "gzip.h"
+#include "intprops.h"
#include "lzw.h"
#include "revision.h"
#include "timespec.h"
-#include "fcntl-safer.h"
+#include "dirname.h"
+#include "dosname.h"
+#include "fcntl--.h"
#include "getopt.h"
#include "ignore-value.h"
#include "stat-time.h"
#include "version.h"
+#include "xalloc.h"
#include "yesno.h"
/* configuration */
-#include <fcntl.h>
#include <limits.h>
#include <unistd.h>
#include <stdlib.h>
# include <utimens.h>
#endif
-#define RW_USER (S_IRUSR | S_IWUSR) /* creation mode for open() */
-
#ifndef MAX_PATH_LEN
# define MAX_PATH_LEN 1024 /* max pathname length */
#endif
off_t lseek (int fd, off_t offset, int whence);
#endif
-#ifndef OFF_T_MIN
-#define OFF_T_MIN (~ (off_t) 0 << (sizeof (off_t) * CHAR_BIT - 1))
-#endif
-
-#ifndef OFF_T_MAX
-#define OFF_T_MAX (~ (off_t) 0 - OFF_T_MIN)
-#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
is deliberately not documented, and only for testing. */
static bool presume_input_tty;
+/* If true, transfer output data to the output file's storage device
+ when supported. Otherwise, if the system crashes around the time
+ gzip is run, the user might lose both input and output data. See:
+ Pillai TS et al. All file systems are not created equal: on the
+ complexity of crafting crash-consistent applications. OSDI'14. 2014:433-48.
+ https://www.usenix.org/conference/osdi14/technical-sessions/presentation/pillai */
+static bool synchronous;
+
static int ascii = 0; /* convert end-of-lines to local OS conventions */
int to_stdout = 0; /* output to stdout (-c) */
static int decompress = 0; /* decompress (-d) */
int save_orig_name; /* set if original name must be saved */
static int last_member; /* set for .zip and .Z files */
static int part_nb; /* number of parts in .gz file */
- struct timespec time_stamp; /* original time stamp (modification time) */
off_t ifile_size; /* input file size, -1 for devices (debug only) */
static char *env; /* contents of GZIP env variable */
-static char **args = NULL; /* argv pointer if GZIP env variable defined */
static char const *z_suffix; /* default suffix (can be set with --suffix) */
static size_t z_len; /* strlen(z_suffix) */
+/* The original timestamp (modification time). If the original is
+ unknown, TIME_STAMP.tv_nsec is negative. If the original is
+ greater than struct timespec range, TIME_STAMP is the maximal
+ struct timespec value; this can happen on hosts with 32-bit signed
+ time_t because the gzip format's MTIME is 32-bit unsigned.
+ The original cannot be less than struct timespec range. */
+struct timespec time_stamp;
+
/* The set of signals that are caught. */
static sigset_t caught_signals;
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;
off_t bytes_in; /* number of input bytes */
off_t bytes_out; /* number of output bytes */
static off_t total_out; /* output bytes for all files */
char ifname[MAX_PATH_LEN]; /* input file name */
char ofname[MAX_PATH_LEN]; /* output file name */
+static char dfname[MAX_PATH_LEN]; /* name of dir containing output file */
static struct stat istat; /* status for input file */
int ifd; /* input file descriptor */
int ofd; /* output file descriptor */
+static int dfd = -1; /* output directory file descriptor */
unsigned insize; /* valid bytes in inbuf */
unsigned inptr; /* index of next byte to be processed in inbuf */
unsigned outcnt; /* bytes in output buffer */
+int rsync = 0; /* make ryncable chunks */
static int handled_sig[] =
{
non-character as a pseudo short option, starting with CHAR_MAX + 1. */
enum
{
- PRESUME_INPUT_TTY_OPTION = CHAR_MAX + 1
+ PRESUME_INPUT_TTY_OPTION = CHAR_MAX + 1,
+ RSYNCABLE_OPTION,
+ SYNCHRONOUS_OPTION,
+
+ /* A value greater than all valid long options, used as a flag to
+ distinguish options derived from the GZIP environment variable. */
+ ENV_OPTION
};
+static char const shortopts[] = "ab:cdfhH?klLmMnNqrS:tvVZ123456789";
+
static const struct option longopts[] =
{
/* { name has_arg *flag val } */
{"-presume-input-tty", no_argument, NULL, PRESUME_INPUT_TTY_OPTION},
{"quiet", 0, 0, 'q'}, /* quiet mode */
{"silent", 0, 0, 'q'}, /* quiet mode */
+ {"synchronous",0, 0, SYNCHRONOUS_OPTION},
{"recursive", 0, 0, 'r'}, /* recurse through directories */
{"suffix", 1, 0, 'S'}, /* use given suffix instead of .gz */
{"test", 0, 0, 't'}, /* test compressed file integrity */
- {"no-time", 0, 0, 'T'}, /* don't save or restore the time stamp */
{"verbose", 0, 0, 'v'}, /* verbose mode */
{"version", 0, 0, 'V'}, /* display version number */
{"fast", 0, 0, '1'}, /* compress faster */
{"best", 0, 0, '9'}, /* compress better */
{"lzw", 0, 0, 'Z'}, /* make output compatible with old compress */
{"bits", 1, 0, 'b'}, /* max number of bits per code (implies -Z) */
-
+ {"rsyncable", 0, 0, RSYNCABLE_OPTION}, /* make rsync-friendly archive */
{ 0, 0, 0, 0 }
};
/* local functions */
-local void try_help (void) ATTRIBUTE_NORETURN;
+local noreturn void try_help (void);
local void help (void);
local void license (void);
local void version (void);
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);
-local void do_exit (int exitcode) ATTRIBUTE_NORETURN;
+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);
static int (*work) (int infile, int outfile) = zip; /* function to call */
" -l, --list list compressed file contents",
" -L, --license display software license",
#ifdef UNDOCUMENTED
- " -m, --no-time do not save or restore the original modification time",
+ " -m do not save or restore the original modification time",
" -M, --time save or restore the original modification time",
#endif
- " -n, --no-name do not save or restore the original name and time stamp",
- " -N, --name save or restore the original name and time stamp",
+ " -n, --no-name do not save or restore the original name and timestamp",
+ " -N, --name save or restore the original name and timestamp",
" -q, --quiet suppress all warnings",
#if ! NO_DIR
" -r, --recursive operate recursively on directories",
#endif
+ " --rsyncable make rsync-friendly archive",
" -S, --suffix=SUF use suffix SUF on compressed files",
+ " --synchronous synchronous output (safer if system crashes, but slower)",
" -t, --test test compressed file integrity",
" -v, --verbose verbose mode",
" -V, --version display version number",
{
int file_count; /* number of files to process */
size_t proglen; /* length of program_name */
- int optc; /* current option */
+ char **argv_copy;
+ int env_argc;
+ char **env_argv;
EXPAND(argc, argv); /* wild card expansion if necessary */
program_name = gzip_base_name (argv[0]);
proglen = strlen (program_name);
- atexit (close_stdin);
-
- /* Suppress .exe for MSDOS, OS/2 and VMS: */
+ /* Suppress .exe for MSDOS and OS/2: */
if (4 < proglen && strequ (program_name + proglen - 4, ".exe"))
program_name[proglen - 4] = '\0';
/* Add options in GZIP environment variable if there is one */
- env = add_envopt(&argc, &argv, OPTIONS_VAR);
- if (env != NULL) args = argv;
+ argv_copy = argv;
+ env = add_envopt (&env_argc, &argv_copy, OPTIONS_VAR);
+ env_argv = env ? argv_copy : NULL;
#ifndef GNU_STANDARD
# define GNU_STANDARD 1
* gzip even if it is invoked under the name gunzip or zcat.
*
* Systems which do not support links can still use -d or -dc.
- * Ignore an .exe extension for MSDOS, OS/2 and VMS.
+ * Ignore an .exe extension for MSDOS and OS/2.
*/
if (strncmp (program_name, "un", 2) == 0 /* ungzip, uncompress */
|| strncmp (program_name, "gun", 3) == 0) /* gunzip */
z_suffix = Z_SUFFIX;
z_len = strlen(z_suffix);
- while ((optc = getopt_long (argc, argv, "ab:cdfhH?klLmMnNqrS:tvVZ123456789",
- longopts, (int *)0)) != -1) {
+ while (true) {
+ int optc;
+ int longind = -1;
+
+ if (env_argv)
+ {
+ if (env_argv[optind] && strequ (env_argv[optind], "--"))
+ optc = ENV_OPTION + '-';
+ else
+ {
+ optc = getopt_long (env_argc, env_argv, shortopts, longopts,
+ &longind);
+ if (0 <= optc)
+ optc += ENV_OPTION;
+ else
+ {
+ if (optind != env_argc)
+ {
+ fprintf (stderr,
+ ("%s: %s: non-option in "OPTIONS_VAR
+ " environment variable\n"),
+ program_name, env_argv[optind]);
+ try_help ();
+ }
+
+ /* Wait until here before warning, so that GZIP='-q'
+ doesn't warn. */
+ if (env_argc != 1 && !quiet)
+ fprintf (stderr,
+ ("%s: warning: "OPTIONS_VAR" environment variable"
+ " is deprecated; use an alias or script\n"),
+ program_name);
+
+ /* Start processing ARGC and ARGV instead. */
+ free (env_argv);
+ env_argv = NULL;
+ optind = 1;
+ longind = -1;
+ }
+ }
+ }
+
+ if (!env_argv)
+ optc = getopt_long (argc, argv, shortopts, longopts, &longind);
+ if (optc < 0)
+ break;
+
switch (optc) {
case 'a':
ascii = 1; break;
case 'f':
force++; break;
case 'h': case 'H':
- help(); do_exit(OK); break;
+ help (); finish_out (); break;
case 'k':
keep = 1; break;
case 'l':
list = decompress = to_stdout = 1; break;
case 'L':
- license(); do_exit(OK); break;
+ license (); finish_out (); break;
case 'm': /* undocumented, may change later */
no_time = 1; break;
case 'M': /* undocumented, may change later */
no_time = 0; break;
case 'n':
+ case 'n' + ENV_OPTION:
no_name = no_time = 1; break;
case 'N':
+ case 'N' + ENV_OPTION:
no_name = no_time = 0; break;
case PRESUME_INPUT_TTY_OPTION:
presume_input_tty = true; break;
case 'q':
+ case 'q' + ENV_OPTION:
quiet = 1; verbose = 0; break;
case 'r':
#if NO_DIR
recursive = 1;
#endif
break;
+
+ case RSYNCABLE_OPTION:
+ case RSYNCABLE_OPTION + ENV_OPTION:
+ rsync = 1;
+ break;
case 'S':
#ifdef NO_MULTIPLE_DOTS
if (*optarg == '.') optarg++;
z_len = strlen(optarg);
z_suffix = optarg;
break;
+ case SYNCHRONOUS_OPTION:
+ synchronous = true;
+ break;
case 't':
test = decompress = to_stdout = 1;
break;
case 'v':
+ case 'v' + ENV_OPTION:
verbose++; quiet = 0; break;
case 'V':
- version(); do_exit(OK); break;
+ version (); finish_out (); break;
case 'Z':
#ifdef LZW
do_lzw = 1; break;
try_help ();
break;
#endif
+ case '1' + ENV_OPTION: case '2' + ENV_OPTION: case '3' + ENV_OPTION:
+ case '4' + ENV_OPTION: case '5' + ENV_OPTION: case '6' + ENV_OPTION:
+ case '7' + ENV_OPTION: case '8' + ENV_OPTION: case '9' + ENV_OPTION:
+ optc -= ENV_OPTION;
+ FALLTHROUGH;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
level = optc - '0';
break;
+
default:
- /* Error message already emitted by getopt_long. */
+ if (ENV_OPTION <= optc && optc != ENV_OPTION + '?')
+ {
+ /* Output a diagnostic, since getopt_long didn't. */
+ fprintf (stderr, "%s: ", program_name);
+ if (longind < 0)
+ fprintf (stderr, "-%c: ", optc - ENV_OPTION);
+ else
+ fprintf (stderr, "--%s: ", longopts[longind].name);
+ fprintf (stderr, ("option not valid in "OPTIONS_VAR
+ " environment variable\n"));
+ }
try_help ();
}
} /* loop on all arguments */
/* And get to work */
if (file_count != 0) {
if (to_stdout && !test && !list && (!decompress || !ascii)) {
- SET_BINARY_MODE(fileno(stdout));
+ SET_BINARY_MODE (STDOUT_FILENO);
}
while (optind < argc) {
treat_file(argv[optind++]);
} else { /* Standard input */
treat_stdin();
}
- if (list && !quiet && file_count > 1) {
- do_list(-1, -1); /* print totals */
- }
+ if (stdin_was_read && close (STDIN_FILENO) != 0)
+ {
+ strcpy (ifname, "stdin");
+ read_error ();
+ }
+ if (list)
+ {
+ /* Output any totals, and check for output errors. */
+ if (!quiet && 1 < file_count)
+ do_list (-1, -1);
+ if (fflush (stdout) != 0)
+ write_error ();
+ }
+ if (to_stdout
+ && ((synchronous
+ && fdatasync (STDOUT_FILENO) != 0 && errno != EINVAL)
+ || close (STDOUT_FILENO) != 0)
+ && 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
*/
{
if (!force && !list
&& (presume_input_tty
- || isatty(fileno((FILE *)(decompress ? stdin : stdout))))) {
+ || isatty (decompress ? STDIN_FILENO : STDOUT_FILENO))) {
/* Do not send compressed data to the terminal or read it from
* the terminal. We get here when user invoked the program
* without parameters, so be helpful. According to the GNU standards:
}
if (decompress || !ascii) {
- SET_BINARY_MODE(fileno(stdin));
+ SET_BINARY_MODE (STDIN_FILENO);
}
if (!test && !list && (!decompress || !ascii)) {
- SET_BINARY_MODE(fileno(stdout));
+ SET_BINARY_MODE (STDOUT_FILENO);
}
strcpy(ifname, "stdin");
strcpy(ofname, "stdout");
- /* Get the file's time stamp and size. */
- if (fstat (fileno (stdin), &istat) != 0)
+ /* Get the file's timestamp and size. */
+ if (fstat (STDIN_FILENO, &istat) != 0)
{
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;
part_nb = 0;
- ifd = fileno(stdin);
+ ifd = STDIN_FILENO;
+ stdin_was_read = true;
if (decompress) {
method = get_method(ifd);
/* Actually do the compression/decompression. Loop over zipped members.
*/
for (;;) {
- if ((*work)(fileno(stdin), fileno(stdout)) != OK) return;
+ if (work (STDIN_FILENO, STDOUT_FILENO) != OK)
+ return;
if (input_eof ())
break;
}
}
+static char const dot = '.';
+
+/* True if the cached directory for calls to openat etc. is DIR, with
+ length DIRLEN. DIR need not be null-terminated. DIRLEN must be
+ less than MAX_PATH_LEN. */
+static bool
+atdir_eq (char const *dir, ptrdiff_t dirlen)
+{
+ if (dirlen == 0)
+ dir = &dot, dirlen = 1;
+ return memcmp (dfname, dir, dirlen) == 0 && !dfname[dirlen];
+}
+
+/* Set the directory used for calls to openat etc. to be the directory
+ DIR, with length DIRLEN. DIR need not be null-terminated.
+ DIRLEN must be less than MAX_PATH_LEN. Return a file descriptor for
+ the directory, or -1 if one could not be obtained. */
+static int
+atdir_set (char const *dir, ptrdiff_t dirlen)
+{
+ /* Don't bother opening directories on older systems that
+ lack openat and unlinkat. It's not worth the porting hassle. */
+ #if HAVE_OPENAT && HAVE_UNLINKAT
+ enum { try_opening_directories = true };
+ #else
+ enum { try_opening_directories = false };
+ #endif
+
+ if (try_opening_directories && ! atdir_eq (dir, dirlen))
+ {
+ if (0 <= dfd)
+ close (dfd);
+ if (dirlen == 0)
+ dir = &dot, dirlen = 1;
+ memcpy (dfname, dir, dirlen);
+ dfname[dirlen] = '\0';
+ dfd = open (dfname, O_SEARCH | O_DIRECTORY);
+ }
+
+ return dfd;
+}
+
/* ========================================================================
* Compress or decompress the given file
*/
}
}
- 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).
* a new ofname and save the original name in the compressed file.
*/
if (to_stdout) {
- ofd = fileno(stdout);
+ ofd = STDOUT_FILENO;
/* Keep remove_ofname_fd negative. */
} else {
if (create_outfile() != OK) return;
if (!to_stdout)
{
-
copy_stat (&istat);
- if (close (ofd) != 0)
+
+ if ((synchronous
+ && ((0 <= dfd && fdatasync (dfd) != 0 && errno != EINVAL)
+ || (fsync (ofd) != 0 && errno != EINVAL)))
+ || close (ofd) != 0)
write_error ();
if (!keep)
{
sigset_t oldset;
int unlink_errno;
+ char *ifbase = last_component (ifname);
+ int ufd = atdir_eq (ifname, ifbase - ifname) ? dfd : -1;
+ int res;
sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
remove_ofname_fd = -1;
- unlink_errno = xunlink (ifname) == 0 ? 0 : errno;
+ res = ufd < 0 ? xunlink (ifname) : unlinkat (ufd, ifbase, 0);
+ unlink_errno = res == 0 ? 0 : errno;
sigprocmask (SIG_SETMASK, &oldset, NULL);
if (unlink_errno)
if (method == -1) {
if (!to_stdout)
- remove_output_file ();
+ remove_output_file (false);
return;
}
} else {
display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
}
- if (!test && !to_stdout) {
- fprintf(stderr, " -- replaced with %s", ofname);
- }
+ if (!test && !to_stdout)
+ fprintf(stderr, " -- %s %s", keep ? "created" : "replaced with",
+ ofname);
fprintf(stderr, "\n");
}
}
+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 name_shortened = 0;
int flags = (O_WRONLY | O_CREAT | O_EXCL
| (ascii && decompress ? 0 : O_BINARY));
+ char const *base = ofname;
+ int atfd = AT_FDCWD;
+
+ if (!keep)
+ {
+ char const *b = last_component (ofname);
+ int f = atdir_set (ofname, b - ofname);
+ if (0 <= f)
+ {
+ base = b;
+ atfd = f;
+ }
+ }
for (;;)
{
int open_errno;
sigset_t oldset;
+ volatile_strcpy (remove_ofname, ofname);
+
sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
- remove_ofname_fd = ofd = OPEN (ofname, flags, RW_USER);
+ remove_ofname_fd = ofd = openat (atfd, base, flags, S_IRUSR | S_IWUSR);
open_errno = errno;
sigprocmask (SIG_SETMASK, &oldset, NULL);
* also accepted suffixes. For Unix, we do not want to accept any
* .??z suffix as indicating a compressed file; some people use .xyz
* to denote volume data.
- * On systems allowing multiple versions of the same file (such as VMS),
- * this function removes any version suffix in the given name.
*/
local char *get_suffix(name)
char *name;
#ifdef MAX_EXT_CHARS
"z",
#endif
- NULL};
- char const **suf = known_suffixes;
+ NULL, NULL};
+ char const **suf;
+ bool suffix_of_builtin = false;
- *suf = z_suffix;
- if (strequ(z_suffix, "z")) suf++; /* check long suffixes first */
+ /* Normally put Z_SUFFIX at the start of KNOWN_SUFFIXES, but if it
+ is a suffix of one of them, put it at the end. */
+ for (suf = known_suffixes + 1; *suf; suf++)
+ {
+ size_t suflen = strlen (*suf);
+ if (z_len < suflen && strequ (z_suffix, *suf + suflen - z_len))
+ {
+ suffix_of_builtin = true;
+ break;
+ }
+ }
+
+ char *z_lower = xstrdup(z_suffix);
+ strlwr(z_lower);
+ known_suffixes[suffix_of_builtin
+ ? sizeof known_suffixes / sizeof *known_suffixes - 2
+ : 0] = z_lower;
+ suf = known_suffixes + suffix_of_builtin;
-#ifdef SUFFIX_SEP
- /* strip a version number from the file name */
- {
- char *v = strrchr(name, SUFFIX_SEP);
- if (v != NULL) *v = '\0';
- }
-#endif
nlen = strlen(name);
if (nlen <= MAX_SUFFIX+2) {
strcpy(suffix, name);
}
strlwr(suffix);
slen = strlen(suffix);
+ char *match = NULL;
do {
int s = strlen(*suf);
- if (slen > s && suffix[slen-s-1] != PATH_SEP
+ if (slen > s && ! ISSLASH (suffix[slen - s - 1])
&& strequ(suffix + slen - s, *suf)) {
- return name+nlen-s;
+ match = name+nlen-s;
+ break;
}
} while (*++suf != NULL);
+ free(z_lower);
- return NULL;
+ return match;
}
-/* Open file NAME with the given flags and mode and store its status
+/* Open file NAME with the given flags and store its status
into *ST. Return a file descriptor to the newly opened file, or -1
(setting errno) on failure. */
static int
-open_and_stat (char *name, int flags, mode_t mode, struct stat *st)
+open_and_stat (char *name, int flags, struct stat *st)
{
int fd;
+ int atfd = AT_FDCWD;
+ char const *base = name;
/* Refuse to follow symbolic links unless -c or -f. */
if (!to_stdout && !force)
flags |= O_NOFOLLOW;
else
{
-#if HAVE_LSTAT || defined lstat
+#ifdef S_ISLNK
if (lstat (name, st) != 0)
return -1;
else if (S_ISLNK (st->st_mode))
}
}
- fd = OPEN (name, flags, mode);
+ if (!keep)
+ {
+ char const *b = last_component (name);
+ int f = atdir_set (name, b - name);
+ if (0 <= f)
+ {
+ base = b;
+ atfd = f;
+ }
+ }
+
+ fd = openat (atfd, base, flags);
if (0 <= fd && fstat (fd, st) != 0)
{
int e = errno;
strcpy(ifname, iname);
/* If input file exists, return OK. */
- fd = open_and_stat (ifname, open_flags, RW_USER, sbuf);
+ fd = open_and_stat (ifname, open_flags, sbuf);
if (0 <= fd)
return fd;
progerror(ifname);
return -1;
}
- /* file.ext doesn't exist, try adding a suffix (after removing any
- * version number for VMS).
- */
+ /* File.ext doesn't exist. Try adding a suffix. */
s = get_suffix(ifname);
if (s != NULL) {
progerror(ifname); /* ifname already has z suffix and does not exist */
if (sizeof ifname <= ilen + strlen (s))
goto name_too_long;
strcat(ifname, s);
- fd = open_and_stat (ifname, open_flags, RW_USER, sbuf);
+ fd = open_and_stat (ifname, open_flags, sbuf);
if (0 <= fd)
return fd;
if (errno != ENOENT)
* original name was given and to_stdout is not set.
* Return the compression method, -1 for error, -2 for warning.
* Set inptr to the offset of the next byte to be processed.
- * Updates time_stamp if there is one and --no-time is not used.
+ * Updates time_stamp if there is one and neither -m nor -n is used.
* This function may be called repeatedly for an input file consisting
* of several contiguous gzip'ed members.
* IN assertions: there is at least one remaining compressed member.
uch magic[10]; /* magic header */
int imagic0; /* first magic byte or EOF */
int imagic1; /* like magic[1], but can represent EOF */
- ulg stamp; /* time stamp */
+ ulg stamp; /* timestamp */
/* If --force and --stdout, zcat == cat, so do not complain about
* premature end of file: use try_byte instead of get_byte.
method = -1; /* unknown yet */
part_nb++; /* number of parts in gzip file */
header_bytes = 0;
- last_member = RECORD_IO;
+ last_member = 0;
/* assume multiple members in gzip file except for record oriented I/O */
if (memcmp(magic, GZIP_MAGIC, 2) == 0
stamp |= ((ulg)get_byte()) << 24;
if (stamp != 0 && !no_time)
{
- time_stamp.tv_sec = stamp;
- time_stamp.tv_nsec = 0;
+ if (stamp <= TYPE_MAXIMUM (time_t))
+ {
+ time_stamp.tv_sec = stamp;
+ time_stamp.tv_nsec = 0;
+ }
+ else
+ {
+ WARN ((stderr,
+ "%s: %s: MTIME %lu out of range for this platform\n",
+ program_name, ifname, stamp));
+ time_stamp.tv_sec = TYPE_MAXIMUM (time_t);
+ time_stamp.tv_nsec = TIMESPEC_RESOLUTION - 1;
+ }
}
magic[8] = get_byte (); /* Ignore extra flags. */
inptr--;
last_member = 1;
if (imagic0 != EOF) {
- write_buf(fileno(stdout), magic, 1);
+ write_buf (STDOUT_FILENO, magic, 1);
bytes_out++;
}
}
"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;
bytes_out = -1L;
bytes_in = ifile_size;
- if (!RECORD_IO && method == DEFLATED && !last_member) {
+ if (method == DEFLATED && !last_member) {
/* Get the crc and uncompressed size for gzip'ed (not zip'ed) files.
* If the lseek fails, we could use read() to get to the end, but
* --list is used to get quick results.
if (verbose)
{
+ static char const month_abbr[][4]
+ = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
struct tm *tm = localtime (&time_stamp.tv_sec);
printf ("%5s %08lx ", methods[method], crc);
if (tm)
- printf ("%s%3d %02d:%02d ",
- ("Jan\0Feb\0Mar\0Apr\0May\0Jun\0Jul\0Aug\0Sep\0Oct\0Nov\0Dec"
- + 4 * tm->tm_mon),
+ printf ("%s%3d %02d:%02d ", month_abbr[tm->tm_mon],
tm->tm_mday, tm->tm_hour, tm->tm_min);
else
printf ("??? ?? ??:?? ");
* 1234.678.012.gz -> 123.678.012.gz
*/
do {
- p = strrchr(name, PATH_SEP);
- p = p ? p+1 : name;
+ p = last_component (name);
while (*p) {
plen = strcspn(p, PART_SEP);
p += plen;
if (!force) {
int ok = 0;
fprintf (stderr, "%s: %s already exists;", program_name, ofname);
- if (foreground && (presume_input_tty || isatty(fileno(stdin)))) {
+ if (foreground && (presume_input_tty || isatty (STDIN_FILENO))) {
fprintf(stderr, " do you wish to overwrite (y or n)? ");
fflush(stderr);
ok = yesno();
return OK;
}
+/* Change the owner and group of a file. FD is a file descriptor for
+ 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)
+{
+# if HAVE_FCHOWN
+ ignore_value (fchown (fd, uid, gid));
+# else
+ ignore_value (chown (name, uid, gid));
+# endif
+}
+#endif
/* ========================================================================
* Copy modes, times, ownership from input file to output file.
int r;
#ifndef NO_UTIME
+ bool restoring;
struct timespec timespec[2];
timespec[0] = get_stat_atime (ifstat);
timespec[1] = get_stat_mtime (ifstat);
+ restoring = (decompress && 0 <= time_stamp.tv_nsec
+ && ! (timespec[1].tv_sec == time_stamp.tv_sec
+ && timespec[1].tv_nsec == time_stamp.tv_nsec));
+ if (restoring)
+ timespec[1] = time_stamp;
- if (decompress && 0 <= time_stamp.tv_nsec
- && ! (timespec[1].tv_sec == time_stamp.tv_sec
- && timespec[1].tv_nsec == time_stamp.tv_nsec))
+ if (fdutimens (ofd, ofname, timespec) == 0)
{
- timespec[1] = time_stamp;
- if (verbose > 1) {
- fprintf(stderr, "%s: time stamp restored\n", ofname);
+ if (restoring && 1 < verbose) {
+ fprintf(stderr, "%s: timestamp restored\n", ofname);
}
}
-
- if (fdutimens (ofd, ofname, timespec) != 0)
+ else
{
int e = errno;
WARN ((stderr, "%s: ", program_name));
}
#endif
-#ifndef NO_CHOWN
- /* Copy ownership */
-# if HAVE_FCHOWN
- ignore_value (fchown (ofd, ifstat->st_uid, ifstat->st_gid));
-# elif HAVE_CHOWN
- ignore_value (chown (ofname, ifstat->st_uid, ifstat->st_gid));
-# endif
-#endif
+ /* Change the group first, then the permissions, then the owner.
+ That way, the permissions will be correct on systems that allow
+ users to give away files, without introducing a security hole.
+ Security depends on permissions not containing the setuid or
+ setgid bits. */
+
+ do_chown (ofd, ofname, -1, ifstat->st_gid);
- /* Copy the protection modes */
#if HAVE_FCHMOD
r = fchmod (ofd, mode);
#else
perror(ofname);
}
}
+
+ do_chown (ofd, ofname, ifstat->st_uid, -1);
}
#if ! NO_DIR
return ;
}
- entries = streamsavedir (dirp);
+ entries = streamsavedir (dirp, SAVEDIR_SORT_NONE);
if (! entries)
progerror (dir);
if (closedir (dirp) != 0)
continue;
if (len + entrylen < MAX_PATH_LEN - 2) {
strcpy(nbuf,dir);
- if (len != 0 /* dir = "" means current dir on Amiga */
-#ifdef PATH_SEP2
- && dir[len-1] != PATH_SEP2
-#endif
-#ifdef PATH_SEP3
- && dir[len-1] != PATH_SEP3
-#endif
- ) {
- nbuf[len++] = PATH_SEP;
- }
+ if (*last_component (nbuf) && !ISSLASH (nbuf[len - 1]))
+ nbuf[len++] = '/';
strcpy (nbuf + len, entry);
treat_file(nbuf);
} else {
{
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
}
/* ========================================================================
in_exit = 1;
free(env);
env = NULL;
- free(args);
- args = NULL;
FREE(inbuf);
FREE(outbuf);
FREE(d_buf);
exit(exitcode);
}
+static void
+finish_out (void)
+{
+ if (fclose (stdout) != 0)
+ write_error ();
+ do_exit (OK);
+}
+
/* ========================================================================
* 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