/* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
- Copyright (C) 1999, 2001-2002, 2006-2007, 2009-2016 Free Software
+ Copyright (C) 1999, 2001-2002, 2006-2007, 2009-2017 Free Software
Foundation, Inc.
Copyright (C) 1992-1993 Jean-loup Gailly
* 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 "timespec.h"
#include "dirname.h"
+#include "dosname.h"
#include "fcntl--.h"
#include "getopt.h"
#include "ignore-value.h"
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 const *z_suffix; /* default suffix (can be set with --suffix) */
static size_t z_len; /* strlen(z_suffix) */
+/* The original timestamp (modification time). Its tv_nsec component
+ is negative if the original time is unknown or is out of time_t
+ range; the latter can happen on hosts with 32-bit signed time_t
+ because the gzip format's MTIME is 32-bit unsigned. */
+struct timespec time_stamp;
+
/* The set of signals that are caught. */
static sigset_t caught_signals;
{"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 */
" -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",
program_name = gzip_base_name (argv[0]);
proglen = strlen (program_name);
- /* 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';
* 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 */
strcpy(ifname, "stdin");
strcpy(ofname, "stdout");
- /* Get the file's time stamp and size. */
+ /* Get the file's timestamp and size. */
if (fstat (STDIN_FILENO, &istat) != 0)
{
progerror ("standard input");
* 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;
: 0] = z_suffix;
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);
slen = strlen(suffix);
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;
}
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))
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 */
* 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()) << 8;
stamp |= ((ulg)get_byte()) << 16;
stamp |= ((ulg)get_byte()) << 24;
- if (stamp != 0 && !no_time)
+ if (!no_time && 0 < stamp && stamp <= TYPE_MAXIMUM (time_t))
{
time_stamp.tv_sec = stamp;
time_stamp.tv_nsec = 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.
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);
+ struct tm *tm = (time_stamp.tv_nsec < 0
+ ? NULL
+ : localtime (&time_stamp.tv_sec));
printf ("%5s %08lx ", methods[method], crc);
if (tm)
printf ("%s%3d %02d:%02d ", month_abbr[tm->tm_mon],
* 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;
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));
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 {