static char *license_msg[] = {
" Copyright (C) 1992-1993 Jean-loup Gailly",
" This program is free software; you can redistribute it and/or modify",
" it under the terms of the GNU General Public License as published by",
" the Free Software Foundation; either version 2, or (at your option)",
" any later version.",
"",
" This program is distributed in the hope that it will be useful,",
" but WITHOUT ANY WARRANTY; without even the implied warranty of",
" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the",
" GNU General Public License for more details.",
"",
" You should have received a copy of the GNU General Public License",
" along with this program; if not, write to the Free Software",
" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.",
0};
#ifdef RCSID
static char rcsid[] = "$Id: gzip.c,v 1.1.1.1 1999/04/23 01:05:57 wsanchez Exp $";
#endif
#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/stat.h>
#include <errno.h>
#include "tailor.h"
#include "gzip.h"
#include "lzw.h"
#include "revision.h"
#include "getopt.h"
#ifdef NO_TIME_H
# include <sys/time.h>
#else
# include <time.h>
#endif
#ifndef NO_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#if defined(STDC_HEADERS) || !defined(NO_STDLIB_H)
# include <stdlib.h>
#else
extern int errno;
#endif
#if defined(DIRENT)
# include <dirent.h>
typedef struct dirent dir_type;
# define NLENGTH(dirent) ((int)strlen((dirent)->d_name))
# define DIR_OPT "DIRENT"
#else
# define NLENGTH(dirent) ((dirent)->d_namlen)
# ifdef SYSDIR
# include <sys/dir.h>
typedef struct direct dir_type;
# define DIR_OPT "SYSDIR"
# else
# ifdef SYSNDIR
# include <sys/ndir.h>
typedef struct direct dir_type;
# define DIR_OPT "SYSNDIR"
# else
# ifdef NDIR
# include <ndir.h>
typedef struct direct dir_type;
# define DIR_OPT "NDIR"
# else
# define NO_DIR
# define DIR_OPT "NO_DIR"
# endif
# endif
# endif
#endif
#ifndef NO_UTIME
# ifndef NO_UTIME_H
# include <utime.h>
# define TIME_OPT "UTIME"
# else
# ifdef HAVE_SYS_UTIME_H
# include <sys/utime.h>
# define TIME_OPT "SYS_UTIME"
# else
struct utimbuf {
time_t actime;
time_t modtime;
};
# define TIME_OPT ""
# endif
# endif
#else
# define TIME_OPT "NO_UTIME"
#endif
#if !defined(S_ISDIR) && defined(S_IFDIR)
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
#if !defined(S_ISREG) && defined(S_IFREG)
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif
typedef RETSIGTYPE (*sig_type) OF((int));
#ifndef O_BINARY
# define O_BINARY 0
#endif
#ifndef O_CREAT
# include <sys/file.h>
# ifndef O_CREAT
# define O_CREAT FCREAT
# endif
# ifndef O_EXCL
# define O_EXCL FEXCL
# endif
#endif
#ifndef S_IRUSR
# define S_IRUSR 0400
#endif
#ifndef S_IWUSR
# define S_IWUSR 0200
#endif
#define RW_USER (S_IRUSR | S_IWUSR)
#ifndef MAX_PATH_LEN
# define MAX_PATH_LEN 1024
#endif
#ifndef SEEK_END
# define SEEK_END 2
#endif
#ifdef NO_OFF_T
typedef long off_t;
off_t lseek OF((int fd, off_t offset, int whence));
#endif
#ifdef NO_MULTIPLE_DOTS
# define PART_SEP "-"
#else
# define PART_SEP "."
#endif
DECLARE(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
DECLARE(ush, d_buf, DIST_BUFSIZE);
DECLARE(uch, window, 2L*WSIZE);
#ifndef MAXSEG_64K
DECLARE(ush, tab_prefix, 1L<<BITS);
#else
DECLARE(ush, tab_prefix0, 1L<<(BITS-1));
DECLARE(ush, tab_prefix1, 1L<<(BITS-1));
#endif
int ascii = 0;
int to_stdout = 0;
int decompress = 0;
int force = 0;
int no_name = -1;
int no_time = -1;
int recursive = 0;
int list = 0;
int verbose = 0;
int quiet = 0;
int do_lzw = 0;
int test = 0;
int foreground;
char *progname;
int maxbits = BITS;
int method = DEFLATED;
int level = 6;
int exit_code = OK;
int save_orig_name;
int last_member;
int part_nb;
long time_stamp;
long ifile_size;
char *env;
char **args = NULL;
char z_suffix[MAX_SUFFIX+1];
int z_len;
long bytes_in;
long bytes_out;
long total_in = 0;
long total_out = 0;
char ifname[MAX_PATH_LEN];
char ofname[MAX_PATH_LEN];
int remove_ofname = 0;
struct stat istat;
int ifd;
int ofd;
unsigned insize;
unsigned inptr;
unsigned outcnt;
struct option longopts[] =
{
{"ascii", 0, 0, 'a'},
{"to-stdout", 0, 0, 'c'},
{"stdout", 0, 0, 'c'},
{"decompress", 0, 0, 'd'},
{"uncompress", 0, 0, 'd'},
{"force", 0, 0, 'f'},
{"help", 0, 0, 'h'},
{"list", 0, 0, 'l'},
{"license", 0, 0, 'L'},
{"no-name", 0, 0, 'n'},
{"name", 0, 0, 'N'},
{"quiet", 0, 0, 'q'},
{"silent", 0, 0, 'q'},
{"recursive", 0, 0, 'r'},
{"suffix", 1, 0, 'S'},
{"test", 0, 0, 't'},
{"no-time", 0, 0, 'T'},
{"verbose", 0, 0, 'v'},
{"version", 0, 0, 'V'},
{"fast", 0, 0, '1'},
{"best", 0, 0, '9'},
{"lzw", 0, 0, 'Z'},
{"bits", 1, 0, 'b'},
{ 0, 0, 0, 0 }
};
local void usage OF((void));
local void help OF((void));
local void license OF((void));
local void version OF((void));
local void treat_stdin OF((void));
local void treat_file OF((char *iname));
local int create_outfile OF((void));
local int do_stat OF((char *name, struct stat *sbuf));
local char *get_suffix OF((char *name));
local int get_istat OF((char *iname, struct stat *sbuf));
local int make_ofname OF((void));
local int same_file OF((struct stat *stat1, struct stat *stat2));
local int name_too_long OF((char *name, struct stat *statb));
local void shorten_name OF((char *name));
local int get_method OF((int in));
local void do_list OF((int ifd, int method));
local int check_ofname OF((void));
local void copy_stat OF((struct stat *ifstat));
local void do_exit OF((int exitcode));
int main OF((int argc, char **argv));
int (*work) OF((int infile, int outfile)) = zip;
#ifndef NO_DIR
local void treat_dir OF((char *dir));
#endif
#ifndef NO_UTIME
local void reset_times OF((char *name, struct stat *statb));
#endif
#define strequ(s1, s2) (strcmp((s1),(s2)) == 0)
local void usage()
{
fprintf(stderr, "usage: %s [-%scdfhlLnN%stvV19] [-S suffix] [file ...]\n",
progname,
#if O_BINARY
"a",
#else
"",
#endif
#ifdef NO_DIR
""
#else
"r"
#endif
);
}
local void help()
{
static char *help_msg[] = {
#if O_BINARY
" -a --ascii ascii text; convert end-of-lines using local conventions",
#endif
" -c --stdout write on standard output, keep original files unchanged",
" -d --decompress decompress",
" -f --force force overwrite of output file and compress links",
" -h --help give this help",
" -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 --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",
" -q --quiet suppress all warnings",
#ifndef NO_DIR
" -r --recursive operate recursively on directories",
#endif
" -S .suf --suffix .suf use suffix .suf on compressed files",
" -t --test test compressed file integrity",
" -v --verbose verbose mode",
" -V --version display version number",
" -1 --fast compress faster",
" -9 --best compress better",
#ifdef LZW
" -Z --lzw produce output compatible with old compress",
" -b --bits maxbits max number of bits per code (implies -Z)",
#endif
" file... files to (de)compress. If none given, use standard input.",
0};
char **p = help_msg;
fprintf(stderr,"%s %s (%s)\n", progname, VERSION, REVDATE);
usage();
while (*p) fprintf(stderr, "%s\n", *p++);
}
local void license()
{
char **p = license_msg;
fprintf(stderr,"%s %s (%s)\n", progname, VERSION, REVDATE);
while (*p) fprintf(stderr, "%s\n", *p++);
}
local void version()
{
fprintf(stderr,"%s %s (%s)\n", progname, VERSION, REVDATE);
fprintf(stderr, "Compilation options:\n%s %s ", DIR_OPT, TIME_OPT);
#ifdef STDC_HEADERS
fprintf(stderr, "STDC_HEADERS ");
#endif
#ifdef HAVE_UNISTD_H
fprintf(stderr, "HAVE_UNISTD_H ");
#endif
#ifdef NO_MEMORY_H
fprintf(stderr, "NO_MEMORY_H ");
#endif
#ifdef NO_STRING_H
fprintf(stderr, "NO_STRING_H ");
#endif
#ifdef NO_SYMLINK
fprintf(stderr, "NO_SYMLINK ");
#endif
#ifdef NO_MULTIPLE_DOTS
fprintf(stderr, "NO_MULTIPLE_DOTS ");
#endif
#ifdef NO_CHOWN
fprintf(stderr, "NO_CHOWN ");
#endif
#ifdef PROTO
fprintf(stderr, "PROTO ");
#endif
#ifdef ASMV
fprintf(stderr, "ASMV ");
#endif
#ifdef DEBUG
fprintf(stderr, "DEBUG ");
#endif
#ifdef DYN_ALLOC
fprintf(stderr, "DYN_ALLOC ");
#endif
#ifdef MAXSEG_64K
fprintf(stderr, "MAXSEG_64K");
#endif
fprintf(stderr, "\n");
}
int main (argc, argv)
int argc;
char **argv;
{
int file_count;
int proglen;
int optc;
EXPAND(argc, argv);
progname = basename(argv[0]);
proglen = strlen(progname);
if (proglen > 4 && strequ(progname+proglen-4, ".exe")) {
progname[proglen-4] = '\0';
}
env = add_envopt(&argc, &argv, OPTIONS_VAR);
if (env != NULL) args = argv;
foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
if (foreground) {
(void) signal (SIGINT, (sig_type)abort_gzip);
}
#ifdef SIGTERM
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
(void) signal(SIGTERM, (sig_type)abort_gzip);
}
#endif
#ifdef SIGHUP
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
(void) signal(SIGHUP, (sig_type)abort_gzip);
}
#endif
#ifndef GNU_STANDARD
if ( strncmp(progname, "un", 2) == 0
|| strncmp(progname, "gun", 3) == 0) {
decompress = 1;
} else if (strequ(progname+1, "cat")
|| strequ(progname, "gzcat")) {
decompress = to_stdout = 1;
}
#endif
strncpy(z_suffix, Z_SUFFIX, sizeof(z_suffix)-1);
z_len = strlen(z_suffix);
while ((optc = getopt_long (argc, argv, "ab:cdfhH?lLmMnNqrS:tvVZ123456789",
longopts, (int *)0)) != EOF) {
switch (optc) {
case 'a':
ascii = 1; break;
case 'b':
maxbits = atoi(optarg);
break;
case 'c':
to_stdout = 1; break;
case 'd':
decompress = 1; break;
case 'f':
force++; break;
case 'h': case 'H': case '?':
help(); do_exit(OK); break;
case 'l':
list = decompress = to_stdout = 1; break;
case 'L':
license(); do_exit(OK); break;
case 'm':
no_time = 1; break;
case 'M':
no_time = 0; break;
case 'n':
no_name = no_time = 1; break;
case 'N':
no_name = no_time = 0; break;
case 'q':
quiet = 1; verbose = 0; break;
case 'r':
#ifdef NO_DIR
fprintf(stderr, "%s: -r not supported on this system\n", progname);
usage();
do_exit(ERROR); break;
#else
recursive = 1; break;
#endif
case 'S':
#ifdef NO_MULTIPLE_DOTS
if (*optarg == '.') optarg++;
#endif
z_len = strlen(optarg);
strcpy(z_suffix, optarg);
break;
case 't':
test = decompress = to_stdout = 1;
break;
case 'v':
verbose++; quiet = 0; break;
case 'V':
version(); do_exit(OK); break;
case 'Z':
#ifdef LZW
do_lzw = 1; break;
#else
fprintf(stderr, "%s: -Z not supported in this version\n",
progname);
usage();
do_exit(ERROR); break;
#endif
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
level = optc - '0';
break;
default:
usage();
do_exit(ERROR);
}
}
if (no_time < 0) no_time = decompress;
if (no_name < 0) no_name = decompress;
file_count = argc - optind;
#if O_BINARY
#else
if (ascii && !quiet) {
fprintf(stderr, "%s: option --ascii ignored on this system\n",
progname);
}
#endif
if ((z_len == 0 && !decompress) || z_len > MAX_SUFFIX) {
fprintf(stderr, "%s: incorrect suffix '%s'\n",
progname, optarg);
do_exit(ERROR);
}
if (do_lzw && !decompress) work = lzw;
ALLOC(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
ALLOC(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
ALLOC(ush, d_buf, DIST_BUFSIZE);
ALLOC(uch, window, 2L*WSIZE);
#ifndef MAXSEG_64K
ALLOC(ush, tab_prefix, 1L<<BITS);
#else
ALLOC(ush, tab_prefix0, 1L<<(BITS-1));
ALLOC(ush, tab_prefix1, 1L<<(BITS-1));
#endif
if (file_count != 0) {
if (to_stdout && !test && !list && (!decompress || !ascii)) {
SET_BINARY_MODE(fileno(stdout));
}
while (optind < argc) {
treat_file(argv[optind++]);
}
} else {
treat_stdin();
}
if (list && !quiet && file_count > 1) {
do_list(-1, -1);
}
do_exit(exit_code);
return exit_code;
}
local void treat_stdin()
{
if (!force && !list &&
isatty(fileno((FILE *)(decompress ? stdin : stdout)))) {
fprintf(stderr,
"%s: compressed data not %s a terminal. Use -f to force %scompression.\n",
progname, decompress ? "read from" : "written to",
decompress ? "de" : "");
fprintf(stderr,"For help, type: %s -h\n", progname);
do_exit(ERROR);
}
if (decompress || !ascii) {
SET_BINARY_MODE(fileno(stdin));
}
if (!test && !list && (!decompress || !ascii)) {
SET_BINARY_MODE(fileno(stdout));
}
strcpy(ifname, "stdin");
strcpy(ofname, "stdout");
time_stamp = 0;
#ifndef NO_STDIN_FSTAT
if (list || !no_time) {
if (fstat(fileno(stdin), &istat) != 0) {
error("fstat(stdin)");
}
# ifdef NO_PIPE_TIMESTAMP
if (S_ISREG(istat.st_mode))
# endif
time_stamp = istat.st_mtime;
#endif
}
ifile_size = -1L;
clear_bufs();
to_stdout = 1;
part_nb = 0;
if (decompress) {
method = get_method(ifd);
if (method < 0) {
do_exit(exit_code);
}
}
if (list) {
do_list(ifd, method);
return;
}
for (;;) {
if ((*work)(fileno(stdin), fileno(stdout)) != OK) return;
if (!decompress || last_member || inptr == insize) break;
method = get_method(ifd);
if (method < 0) return;
bytes_out = 0;
}
if (verbose) {
if (test) {
fprintf(stderr, " OK\n");
} else if (!decompress) {
display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
fprintf(stderr, "\n");
#ifdef DISPLAY_STDIN_RATIO
} else {
display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out,stderr);
fprintf(stderr, "\n");
#endif
}
}
}
local void treat_file(iname)
char *iname;
{
if (strequ(iname, "-")) {
int cflag = to_stdout;
treat_stdin();
to_stdout = cflag;
return;
}
if (get_istat(iname, &istat) != OK) return;
if (S_ISDIR(istat.st_mode)) {
#ifndef NO_DIR
if (recursive) {
struct stat st;
st = istat;
treat_dir(iname);
# ifndef NO_UTIME
reset_times (iname, &st);
# endif
} else
#endif
WARN((stderr,"%s: %s is a directory -- ignored\n", progname, ifname));
return;
}
if (!S_ISREG(istat.st_mode)) {
WARN((stderr,
"%s: %s is not a directory or a regular file - ignored\n",
progname, ifname));
return;
}
if (istat.st_nlink > 1 && !to_stdout && !force) {
WARN((stderr, "%s: %s has %d other link%c -- unchanged\n",
progname, ifname,
(int)istat.st_nlink - 1, istat.st_nlink > 2 ? 's' : ' '));
return;
}
ifile_size = istat.st_size;
time_stamp = no_time && !list ? 0 : istat.st_mtime;
if (to_stdout && !list && !test) {
strcpy(ofname, "stdout");
} else if (make_ofname() != OK) {
return;
}
ifd = OPEN(ifname, ascii && !decompress ? O_RDONLY : O_RDONLY | O_BINARY,
RW_USER);
if (ifd == -1) {
fprintf(stderr, "%s: ", progname);
perror(ifname);
exit_code = ERROR;
return;
}
clear_bufs();
part_nb = 0;
if (decompress) {
method = get_method(ifd);
if (method < 0) {
close(ifd);
return;
}
}
if (list) {
do_list(ifd, method);
close(ifd);
return;
}
if (to_stdout) {
ofd = fileno(stdout);
} else {
if (create_outfile() != OK) return;
if (!decompress && save_orig_name && !verbose && !quiet) {
fprintf(stderr, "%s: %s compressed to %s\n",
progname, ifname, ofname);
}
}
if (!save_orig_name) save_orig_name = !no_name;
if (verbose) {
fprintf(stderr, "%s:\t%s", ifname, (int)strlen(ifname) >= 15 ?
"" : ((int)strlen(ifname) >= 7 ? "\t" : "\t\t"));
}
for (;;) {
if ((*work)(ifd, ofd) != OK) {
method = -1;
break;
}
if (!decompress || last_member || inptr == insize) break;
method = get_method(ifd);
if (method < 0) break;
bytes_out = 0;
}
close(ifd);
if (!to_stdout && close(ofd)) {
write_error();
}
if (method == -1) {
if (!to_stdout) unlink (ofname);
return;
}
if(verbose) {
if (test) {
fprintf(stderr, " OK");
} else if (decompress) {
display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out,stderr);
} else {
display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
}
if (!test && !to_stdout) {
fprintf(stderr, " -- replaced with %s", ofname);
}
fprintf(stderr, "\n");
}
if (!to_stdout) {
copy_stat(&istat);
}
}
local int create_outfile()
{
struct stat ostat;
int flags = O_WRONLY | O_CREAT | O_EXCL | O_BINARY;
if (ascii && decompress) {
flags &= ~O_BINARY;
}
for (;;) {
if (check_ofname() != OK) {
close(ifd);
return ERROR;
}
remove_ofname = 1;
ofd = OPEN(ofname, flags, RW_USER);
if (ofd == -1) {
perror(ofname);
close(ifd);
exit_code = ERROR;
return ERROR;
}
#ifdef NO_FSTAT
if (stat(ofname, &ostat) != 0) {
#else
if (fstat(ofd, &ostat) != 0) {
#endif
fprintf(stderr, "%s: ", progname);
perror(ofname);
close(ifd); close(ofd);
unlink(ofname);
exit_code = ERROR;
return ERROR;
}
if (!name_too_long(ofname, &ostat)) return OK;
if (decompress) {
WARN((stderr, "%s: %s: warning, name truncated\n",
progname, ofname));
return OK;
}
close(ofd);
unlink(ofname);
#ifdef NO_MULTIPLE_DOTS
fprintf(stderr, "%s: %s: name too long\n", progname, ofname);
do_exit(ERROR);
#endif
shorten_name(ofname);
}
}
local int do_stat(name, sbuf)
char *name;
struct stat *sbuf;
{
errno = 0;
#if (defined(S_IFLNK) || defined (S_ISLNK)) && !defined(NO_SYMLINK)
if (!to_stdout && !force) {
return lstat(name, sbuf);
}
#endif
return stat(name, sbuf);
}
local char *get_suffix(name)
char *name;
{
int nlen, slen;
char suffix[MAX_SUFFIX+3];
static char *known_suffixes[] =
{z_suffix, ".gz", ".z", ".taz", ".tgz", "-gz", "-z", "_z",
#ifdef MAX_EXT_CHARS
"z",
#endif
NULL};
char **suf = known_suffixes;
if (strequ(z_suffix, "z")) suf++;
#ifdef SUFFIX_SEP
{
char *v = strrchr(name, SUFFIX_SEP);
if (v != NULL) *v = '\0';
}
#endif
nlen = strlen(name);
if (nlen <= MAX_SUFFIX+2) {
strcpy(suffix, name);
} else {
strcpy(suffix, name+nlen-MAX_SUFFIX-2);
}
strlwr(suffix);
slen = strlen(suffix);
do {
int s = strlen(*suf);
if (slen > s && suffix[slen-s-1] != PATH_SEP
&& strequ(suffix + slen - s, *suf)) {
return name+nlen-s;
}
} while (*++suf != NULL);
return NULL;
}
local int get_istat(iname, sbuf)
char *iname;
struct stat *sbuf;
{
int ilen;
static char *suffixes[] = {z_suffix, ".gz", ".z", "-z", ".Z", NULL};
char **suf = suffixes;
char *s;
#ifdef NO_MULTIPLE_DOTS
char *dot;
#endif
strcpy(ifname, iname);
if (do_stat(ifname, sbuf) == 0) return OK;
if (!decompress || errno != ENOENT) {
perror(ifname);
exit_code = ERROR;
return ERROR;
}
s = get_suffix(ifname);
if (s != NULL) {
perror(ifname);
exit_code = ERROR;
return ERROR;
}
#ifdef NO_MULTIPLE_DOTS
dot = strrchr(ifname, '.');
if (dot == NULL) {
strcat(ifname, ".");
dot = strrchr(ifname, '.');
}
#endif
ilen = strlen(ifname);
if (strequ(z_suffix, ".gz")) suf++;
do {
s = *suf;
#ifdef NO_MULTIPLE_DOTS
if (*s == '.') s++;
#endif
#ifdef MAX_EXT_CHARS
strcpy(ifname, iname);
if (*dot == '\0') strcpy(dot, ".");
dot[MAX_EXT_CHARS+1-strlen(s)] = '\0';
#endif
strcat(ifname, s);
if (do_stat(ifname, sbuf) == 0) return OK;
ifname[ilen] = '\0';
} while (*++suf != NULL);
#ifdef MAX_EXT_CHARS
strcpy(ifname, iname);
if (*dot == '\0') strcpy(dot, ".");
dot[MAX_EXT_CHARS+1-z_len] = '\0';
#endif
strcat(ifname, z_suffix);
perror(ifname);
exit_code = ERROR;
return ERROR;
}
local int make_ofname()
{
char *suff;
strcpy(ofname, ifname);
suff = get_suffix(ofname);
if (decompress) {
if (suff == NULL) {
if (!recursive && (list || test)) return OK;
if (verbose || (!recursive && !quiet)) {
WARN((stderr,"%s: %s: unknown suffix -- ignored\n",
progname, ifname));
}
return WARNING;
}
strlwr(suff);
if (strequ(suff, ".tgz") || strequ(suff, ".taz")) {
strcpy(suff, ".tar");
} else {
*suff = '\0';
}
} else if (suff != NULL) {
if (verbose || (!recursive && !quiet)) {
fprintf(stderr, "%s: %s already has %s suffix -- unchanged\n",
progname, ifname, suff);
}
if (exit_code == OK) exit_code = WARNING;
return WARNING;
} else {
save_orig_name = 0;
#ifdef NO_MULTIPLE_DOTS
suff = strrchr(ofname, '.');
if (suff == NULL) {
strcat(ofname, ".");
# ifdef MAX_EXT_CHARS
if (strequ(z_suffix, "z")) {
strcat(ofname, "gz");
return OK;
}
} else if (strlen(suff)-1 + z_len > MAX_SUFFIX) {
suff[MAX_SUFFIX+1-z_len] = '\0';
save_orig_name = 1;
# endif
}
#endif
strcat(ofname, z_suffix);
}
return OK;
}
local int get_method(in)
int in;
{
uch flags;
char magic[2];
ulg stamp;
if (force && to_stdout) {
magic[0] = (char)try_byte();
magic[1] = (char)try_byte();
} else {
magic[0] = (char)get_byte();
magic[1] = (char)get_byte();
}
method = -1;
part_nb++;
header_bytes = 0;
last_member = RECORD_IO;
if (memcmp(magic, GZIP_MAGIC, 2) == 0
|| memcmp(magic, OLD_GZIP_MAGIC, 2) == 0) {
method = (int)get_byte();
if (method != DEFLATED) {
fprintf(stderr,
"%s: %s: unknown method %d -- get newer version of gzip\n",
progname, ifname, method);
exit_code = ERROR;
return -1;
}
work = unzip;
flags = (uch)get_byte();
if ((flags & ENCRYPTED) != 0) {
fprintf(stderr,
"%s: %s is encrypted -- get newer version of gzip\n",
progname, ifname);
exit_code = ERROR;
return -1;
}
if ((flags & CONTINUATION) != 0) {
fprintf(stderr,
"%s: %s is a a multi-part gzip file -- get newer version of gzip\n",
progname, ifname);
exit_code = ERROR;
if (force <= 1) return -1;
}
if ((flags & RESERVED) != 0) {
fprintf(stderr,
"%s: %s has flags 0x%x -- get newer version of gzip\n",
progname, ifname, flags);
exit_code = ERROR;
if (force <= 1) return -1;
}
stamp = (ulg)get_byte();
stamp |= ((ulg)get_byte()) << 8;
stamp |= ((ulg)get_byte()) << 16;
stamp |= ((ulg)get_byte()) << 24;
if (stamp != 0 && !no_time) time_stamp = stamp;
(void)get_byte();
(void)get_byte();
if ((flags & CONTINUATION) != 0) {
unsigned part = (unsigned)get_byte();
part |= ((unsigned)get_byte())<<8;
if (verbose) {
fprintf(stderr,"%s: %s: part number %u\n",
progname, ifname, part);
}
}
if ((flags & EXTRA_FIELD) != 0) {
unsigned len = (unsigned)get_byte();
len |= ((unsigned)get_byte())<<8;
if (verbose) {
fprintf(stderr,"%s: %s: extra field of %u bytes ignored\n",
progname, ifname, len);
}
while (len--) (void)get_byte();
}
if ((flags & ORIG_NAME) != 0) {
if (no_name || (to_stdout && !list) || part_nb > 1) {
char c;
do {c=get_byte();} while (c != 0);
} else {
char *p = basename(ofname);
char *base = p;
for (;;) {
*p = (char)get_char();
if (*p++ == '\0') break;
if (p >= ofname+sizeof(ofname)) {
error("corrupted input -- file name too large");
}
}
if (!list) {
MAKE_LEGAL_NAME(base);
if (base) list=0;
}
}
}
if ((flags & COMMENT) != 0) {
while (get_char() != 0) ;
}
if (part_nb == 1) {
header_bytes = inptr + 2*sizeof(long);
}
} else if (memcmp(magic, PKZIP_MAGIC, 2) == 0 && inptr == 2
&& memcmp((char*)inbuf, PKZIP_MAGIC, 4) == 0) {
inptr = 0;
work = unzip;
if (check_zipfile(in) != OK) return -1;
last_member = 1;
} else if (memcmp(magic, PACK_MAGIC, 2) == 0) {
work = unpack;
method = PACKED;
} else if (memcmp(magic, LZW_MAGIC, 2) == 0) {
work = unlzw;
method = COMPRESSED;
last_member = 1;
} else if (memcmp(magic, LZH_MAGIC, 2) == 0) {
work = unlzh;
method = LZHED;
last_member = 1;
} else if (force && to_stdout && !list) {
method = STORED;
work = copy;
inptr = 0;
last_member = 1;
}
if (method >= 0) return method;
if (part_nb == 1) {
fprintf(stderr, "\n%s: %s: not in gzip format\n", progname, ifname);
exit_code = ERROR;
return -1;
} else {
WARN((stderr, "\n%s: %s: decompression OK, trailing garbage ignored\n",
progname, ifname));
return -2;
}
}
local void do_list(ifd, method)
int ifd;
int method;
{
ulg crc;
static int first_time = 1;
static char* methods[MAX_METHODS] = {
"store",
"compr",
"pack ",
"lzh ",
"", "", "", "",
"defla"};
char *date;
if (first_time && method >= 0) {
first_time = 0;
if (verbose) {
printf("method crc date time ");
}
if (!quiet) {
printf("compressed uncompr. ratio uncompressed_name\n");
}
} else if (method < 0) {
if (total_in <= 0 || total_out <= 0) return;
if (verbose) {
printf(" %9lu %9lu ",
total_in, total_out);
} else if (!quiet) {
printf("%9ld %9ld ", total_in, total_out);
}
display_ratio(total_out-(total_in-header_bytes), total_out, stdout);
printf(" (totals)\n");
return;
}
crc = (ulg)~0;
bytes_out = -1L;
bytes_in = ifile_size;
#if RECORD_IO == 0
if (method == DEFLATED && !last_member) {
bytes_in = (long)lseek(ifd, (off_t)(-8), SEEK_END);
if (bytes_in != -1L) {
uch buf[8];
bytes_in += 8L;
if (read(ifd, (char*)buf, sizeof(buf)) != sizeof(buf)) {
read_error();
}
crc = LG(buf);
bytes_out = LG(buf+4);
}
}
#endif
date = ctime((time_t*)&time_stamp) + 4;
date[12] = '\0';
if (verbose) {
printf("%5s %08lx %11s ", methods[method], crc, date);
}
printf("%9ld %9ld ", bytes_in, bytes_out);
if (bytes_in == -1L) {
total_in = -1L;
bytes_in = bytes_out = header_bytes = 0;
} else if (total_in >= 0) {
total_in += bytes_in;
}
if (bytes_out == -1L) {
total_out = -1L;
bytes_in = bytes_out = header_bytes = 0;
} else if (total_out >= 0) {
total_out += bytes_out;
}
display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out, stdout);
printf(" %s\n", ofname);
}
local int same_file(stat1, stat2)
struct stat *stat1;
struct stat *stat2;
{
return stat1->st_ino == stat2->st_ino
&& stat1->st_dev == stat2->st_dev
#ifdef NO_ST_INO
&& stat1->st_mode == stat2->st_mode
&& stat1->st_uid == stat2->st_uid
&& stat1->st_gid == stat2->st_gid
&& stat1->st_size == stat2->st_size
&& stat1->st_atime == stat2->st_atime
&& stat1->st_mtime == stat2->st_mtime
&& stat1->st_ctime == stat2->st_ctime
#endif
;
}
local int name_too_long(name, statb)
char *name;
struct stat *statb;
{
int s = strlen(name);
char c = name[s-1];
struct stat tstat;
int res;
tstat = *statb;
name[s-1] = '\0';
res = stat(name, &tstat) == 0 && same_file(statb, &tstat);
name[s-1] = c;
Trace((stderr, " too_long(%s) => %d\n", name, res));
return res;
}
local void shorten_name(name)
char *name;
{
int len;
char *trunc = NULL;
int plen;
int min_part = MIN_PART;
char *p;
len = strlen(name);
if (decompress) {
if (len <= 1) error("name too short");
name[len-1] = '\0';
return;
}
p = get_suffix(name);
if (p == NULL) error("can't recover suffix\n");
*p = '\0';
save_orig_name = 1;
if (len > 4 && strequ(p-4, ".tar")) {
strcpy(p-4, ".tgz");
return;
}
do {
p = strrchr(name, PATH_SEP);
p = p ? p+1 : name;
while (*p) {
plen = strcspn(p, PART_SEP);
p += plen;
if (plen > min_part) trunc = p-1;
if (*p) p++;
}
} while (trunc == NULL && --min_part != 0);
if (trunc != NULL) {
do {
trunc[0] = trunc[1];
} while (*trunc++);
trunc--;
} else {
trunc = strrchr(name, PART_SEP[0]);
if (trunc == NULL) error("internal error in shorten_name");
if (trunc[1] == '\0') trunc--;
}
strcpy(trunc, z_suffix);
}
local int check_ofname()
{
struct stat ostat;
#ifdef ENAMETOOLONG
errno = 0;
while (stat(ofname, &ostat) != 0) {
if (errno != ENAMETOOLONG) return 0;
shorten_name(ofname);
}
#else
if (stat(ofname, &ostat) != 0) return 0;
#endif
if (!decompress && name_too_long(ofname, &ostat)) {
shorten_name(ofname);
if (stat(ofname, &ostat) != 0) return 0;
}
if (same_file(&istat, &ostat)) {
if (strequ(ifname, ofname)) {
fprintf(stderr, "%s: %s: cannot %scompress onto itself\n",
progname, ifname, decompress ? "de" : "");
} else {
fprintf(stderr, "%s: %s and %s are the same file\n",
progname, ifname, ofname);
}
exit_code = ERROR;
return ERROR;
}
if (!force) {
char response[80];
strcpy(response,"n");
fprintf(stderr, "%s: %s already exists;", progname, ofname);
if (foreground && isatty(fileno(stdin))) {
fprintf(stderr, " do you wish to overwrite (y or n)? ");
fflush(stderr);
(void)fgets(response, sizeof(response)-1, stdin);
}
if (tolow(*response) != 'y') {
fprintf(stderr, "\tnot overwritten\n");
if (exit_code == OK) exit_code = WARNING;
return ERROR;
}
}
(void) chmod(ofname, 0777);
if (unlink(ofname)) {
fprintf(stderr, "%s: ", progname);
perror(ofname);
exit_code = ERROR;
return ERROR;
}
return OK;
}
#ifndef NO_UTIME
local void reset_times (name, statb)
char *name;
struct stat *statb;
{
struct utimbuf timep;
timep.actime = statb->st_atime;
timep.modtime = statb->st_mtime;
if (utime(name, &timep) && !S_ISDIR(statb->st_mode)) {
WARN((stderr, "%s: ", progname));
if (!quiet) perror(ofname);
}
}
#endif
local void copy_stat(ifstat)
struct stat *ifstat;
{
#ifndef NO_UTIME
if (decompress && time_stamp != 0 && ifstat->st_mtime != time_stamp) {
ifstat->st_mtime = time_stamp;
if (verbose > 1) {
fprintf(stderr, "%s: time stamp restored\n", ofname);
}
}
reset_times(ofname, ifstat);
#endif
if (chmod(ofname, ifstat->st_mode & 07777)) {
WARN((stderr, "%s: ", progname));
if (!quiet) perror(ofname);
}
#ifndef NO_CHOWN
chown(ofname, ifstat->st_uid, ifstat->st_gid);
#endif
remove_ofname = 0;
(void) chmod(ifname, 0777);
if (unlink(ifname)) {
WARN((stderr, "%s: ", progname));
if (!quiet) perror(ifname);
}
}
#ifndef NO_DIR
local void treat_dir(dir)
char *dir;
{
dir_type *dp;
DIR *dirp;
char nbuf[MAX_PATH_LEN];
int len;
dirp = opendir(dir);
if (dirp == NULL) {
fprintf(stderr, "%s: %s unreadable\n", progname, dir);
exit_code = ERROR;
return ;
}
while ((dp = readdir(dirp)) != NULL) {
if (strequ(dp->d_name,".") || strequ(dp->d_name,"..")) {
continue;
}
len = strlen(dir);
if (len + NLENGTH(dp) + 1 < MAX_PATH_LEN - 1) {
strcpy(nbuf,dir);
if (len != 0
#ifdef PATH_SEP2
&& dir[len-1] != PATH_SEP2
#endif
#ifdef PATH_SEP3
&& dir[len-1] != PATH_SEP3
#endif
) {
nbuf[len++] = PATH_SEP;
}
strcpy(nbuf+len, dp->d_name);
treat_file(nbuf);
} else {
fprintf(stderr,"%s: %s/%s: pathname too long\n",
progname, dir, dp->d_name);
exit_code = ERROR;
}
}
closedir(dirp);
}
#endif
local void do_exit(exitcode)
int exitcode;
{
static int in_exit = 0;
if (in_exit) exit(exitcode);
in_exit = 1;
if (env != NULL) free(env), env = NULL;
if (args != NULL) free((char*)args), args = NULL;
FREE(inbuf);
FREE(outbuf);
FREE(d_buf);
FREE(window);
#ifndef MAXSEG_64K
FREE(tab_prefix);
#else
FREE(tab_prefix0);
FREE(tab_prefix1);
#endif
exit(exitcode);
}
RETSIGTYPE abort_gzip()
{
if (remove_ofname) {
close(ofd);
unlink (ofname);
}
do_exit(ERROR);
}