--- /dev/null
+/* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
+ * Copyright (C) 1992-1993 Jean-loup Gailly
+ * The unzip code was written and put in the public domain by Mark Adler.
+ * Portions of the lzw code are derived from the public domain 'compress'
+ * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
+ * Ken Turkowski, Dave Mack and Peter Jannesen.
+ *
+ * See the license_msg below and the file COPYING for the software license.
+ * See the file algorithm.doc for the compression algorithms and file formats.
+ */
+
+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};
+
+/* Compress files with zip algorithm and 'compress' interface.
+ * See usage() and help() functions below for all options.
+ * Outputs:
+ * file.gz: compressed file with same mode, owner, and utimes
+ * 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.
+ *
+ * Using gz on MSDOS would create too many file name conflicts. For
+ * example, foo.txt -> foo.tgz (.tgz must be reserved as shorthand for
+ * tar.gz). Similarly, foo.dir and foo.doc would both be mapped to foo.dgz.
+ * I also considered 12345678.txt -> 12345txt.gz but this truncates the name
+ * too heavily. There is no ideal solution given the MSDOS 8+3 limitation.
+ *
+ * For the meaning of all compilation flags, see comments in Makefile.in.
+ */
+
+#ifdef RCSID
+static char rcsid[] = "$Id$";
+#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"
+
+ /* configuration */
+
+#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 /* creation mode for open() */
+#endif
+
+#ifndef O_CREAT
+ /* Pure BSD system? */
+# 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) /* creation mode for open() */
+
+#ifndef MAX_PATH_LEN
+# define MAX_PATH_LEN 1024 /* max pathname length */
+#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
+
+/* Separator for file name parts (see shorten_name()) */
+#ifdef NO_MULTIPLE_DOTS
+# define PART_SEP "-"
+#else
+# define PART_SEP "."
+#endif
+
+ /* global buffers */
+
+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
+
+ /* local variables */
+
+int ascii = 0; /* convert end-of-lines to local OS conventions */
+int to_stdout = 0; /* output to stdout (-c) */
+int decompress = 0; /* decompress (-d) */
+int force = 0; /* don't ask questions, compress links (-f) */
+int no_name = -1; /* don't save or restore the original file name */
+int no_time = -1; /* don't save or restore the original file time */
+int recursive = 0; /* recurse through directories (-r) */
+int list = 0; /* list the file contents (-l) */
+int verbose = 0; /* be verbose (-v) */
+int quiet = 0; /* be very quiet (-q) */
+int do_lzw = 0; /* generate output compatible with old compress (-Z) */
+int test = 0; /* test .gz file integrity */
+int foreground; /* set if program run in foreground */
+char *progname; /* program name */
+int maxbits = BITS; /* max bits per code for LZW */
+int method = DEFLATED;/* compression method */
+int level = 6; /* compression level */
+int exit_code = OK; /* program exit code */
+int save_orig_name; /* set if original name must be saved */
+int last_member; /* set for .zip and .Z files */
+int part_nb; /* number of parts in .gz file */
+long time_stamp; /* original time stamp (modification time) */
+long ifile_size; /* input file size, -1 for devices (debug only) */
+char *env; /* contents of GZIP env variable */
+char **args = NULL; /* argv pointer if GZIP env variable defined */
+char z_suffix[MAX_SUFFIX+1]; /* default suffix (can be set with --suffix) */
+int z_len; /* strlen(z_suffix) */
+
+long bytes_in; /* number of input bytes */
+long bytes_out; /* number of output bytes */
+long total_in = 0; /* input bytes for all files */
+long total_out = 0; /* output bytes for all files */
+char ifname[MAX_PATH_LEN]; /* input file name */
+char ofname[MAX_PATH_LEN]; /* output file name */
+int remove_ofname = 0; /* remove output file on error */
+struct stat istat; /* status for input file */
+int ifd; /* input file descriptor */
+int ofd; /* output 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 */
+
+struct option longopts[] =
+{
+ /* { name has_arg *flag val } */
+ {"ascii", 0, 0, 'a'}, /* ascii text mode */
+ {"to-stdout", 0, 0, 'c'}, /* write output on standard output */
+ {"stdout", 0, 0, 'c'}, /* write output on standard output */
+ {"decompress", 0, 0, 'd'}, /* decompress */
+ {"uncompress", 0, 0, 'd'}, /* decompress */
+ /* {"encrypt", 0, 0, 'e'}, encrypt */
+ {"force", 0, 0, 'f'}, /* force overwrite of output file */
+ {"help", 0, 0, 'h'}, /* give help */
+ /* {"pkzip", 0, 0, 'k'}, force output in pkzip format */
+ {"list", 0, 0, 'l'}, /* list .gz file contents */
+ {"license", 0, 0, 'L'}, /* display software license */
+ {"no-name", 0, 0, 'n'}, /* don't save or restore original name & time */
+ {"name", 0, 0, 'N'}, /* save or restore original name & time */
+ {"quiet", 0, 0, 'q'}, /* quiet mode */
+ {"silent", 0, 0, 'q'}, /* quiet mode */
+ {"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) */
+ { 0, 0, 0, 0 }
+};
+
+/* local functions */
+
+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; /* function to call */
+
+#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",
+/* -e --encrypt encrypt */
+ " -f --force force overwrite of output file and compress links",
+ " -h --help give this help",
+/* -k --pkzip force output in pkzip format */
+ " -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; /* number of files to precess */
+ int proglen; /* length of progname */
+ int optc; /* current option */
+
+ EXPAND(argc, argv); /* wild card expansion if necessary */
+
+ progname = basename(argv[0]);
+ proglen = strlen(progname);
+
+ /* Suppress .exe for MSDOS, OS/2 and VMS: */
+ if (proglen > 4 && strequ(progname+proglen-4, ".exe")) {
+ progname[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;
+
+ 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
+ /* For compatibility with old compress, use program name as an option.
+ * If you compile with -DGNU_STANDARD, this program will behave as
+ * 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.
+ */
+ if ( strncmp(progname, "un", 2) == 0 /* ungzip, uncompress */
+ || strncmp(progname, "gun", 3) == 0) { /* gunzip */
+ decompress = 1;
+ } else if (strequ(progname+1, "cat") /* zcat, pcat, gcat */
+ || strequ(progname, "gzcat")) { /* 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': /* undocumented, may change later */
+ no_time = 1; break;
+ case 'M': /* undocumented, may change later */
+ 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:
+ /* Error message already emitted by getopt_long. */
+ usage();
+ do_exit(ERROR);
+ }
+ } /* loop on all arguments */
+
+ /* By default, save name and timestamp on compression but do not
+ * restore them on decompression.
+ */
+ 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;
+
+ /* Allocate all global buffers (for DYN_ALLOC option) */
+ 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
+
+ /* And get to work */
+ if (file_count != 0) {
+ if (to_stdout && !test && !list && (!decompress || !ascii)) {
+ SET_BINARY_MODE(fileno(stdout));
+ }
+ while (optind < argc) {
+ treat_file(argv[optind++]);
+ }
+ } else { /* Standard input */
+ treat_stdin();
+ }
+ if (list && !quiet && file_count > 1) {
+ do_list(-1, -1); /* print totals */
+ }
+ do_exit(exit_code);
+ return exit_code; /* just to avoid lint warning */
+}
+
+/* ========================================================================
+ * Compress or decompress stdin
+ */
+local void treat_stdin()
+{
+ if (!force && !list &&
+ isatty(fileno((FILE *)(decompress ? stdin : stdout)))) {
+ /* 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 there is one behavior you think is most useful when the output
+ * is to a terminal, and another that you think is most useful when
+ * the output is a file or a pipe, then it is usually best to make
+ * the default behavior the one that is useful with output to a
+ * terminal, and have an option for the other behavior.
+ *
+ * Here we use the --force option to get the other behavior.
+ */
+ 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");
+
+ /* Get the time stamp on the input file. */
+ time_stamp = 0; /* time unknown by default */
+
+#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 /* NO_STDIN_FSTAT */
+ }
+ ifile_size = -1L; /* convention for unknown size */
+
+ clear_bufs(); /* clear input and output buffers */
+ to_stdout = 1;
+ part_nb = 0;
+
+ if (decompress) {
+ method = get_method(ifd);
+ if (method < 0) {
+ do_exit(exit_code); /* error message already emitted */
+ }
+ }
+ if (list) {
+ do_list(ifd, method);
+ return;
+ }
+
+ /* Actually do the compression/decompression. Loop over zipped members.
+ */
+ for (;;) {
+ if ((*work)(fileno(stdin), fileno(stdout)) != OK) return;
+
+ if (!decompress || last_member || inptr == insize) break;
+ /* end of file */
+
+ method = get_method(ifd);
+ if (method < 0) return; /* error message already emitted */
+ bytes_out = 0; /* required for length check */
+ }
+
+ 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
+ }
+ }
+}
+
+/* ========================================================================
+ * Compress or decompress the given file
+ */
+local void treat_file(iname)
+ char *iname;
+{
+ /* Accept "-" as synonym for stdin */
+ if (strequ(iname, "-")) {
+ int cflag = to_stdout;
+ treat_stdin();
+ to_stdout = cflag;
+ return;
+ }
+
+ /* Check if the input file is present, set ifname and istat: */
+ if (get_istat(iname, &istat) != OK) return;
+
+ /* If the input name is that of a directory, recurse or ignore: */
+ if (S_ISDIR(istat.st_mode)) {
+#ifndef NO_DIR
+ if (recursive) {
+ struct stat st;
+ st = istat;
+ treat_dir(iname);
+ /* Warning: ifname is now garbage */
+# 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;
+
+ /* Generate output file name. For -r and (-t or -l), skip files
+ * without a valid gzip suffix (check done in make_ofname).
+ */
+ if (to_stdout && !list && !test) {
+ strcpy(ofname, "stdout");
+
+ } else if (make_ofname() != OK) {
+ return;
+ }
+
+ /* Open the input file and determine compression method. The mode
+ * parameter is ignored but required by some systems (VMS) and forbidden
+ * on other systems (MacOS).
+ */
+ 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(); /* clear input and output buffers */
+ part_nb = 0;
+
+ if (decompress) {
+ method = get_method(ifd); /* updates ofname if original given */
+ if (method < 0) {
+ close(ifd);
+ return; /* error message already emitted */
+ }
+ }
+ if (list) {
+ do_list(ifd, method);
+ close(ifd);
+ return;
+ }
+
+ /* If compressing to a file, check if ofname is not ambiguous
+ * because the operating system truncates names. Otherwise, generate
+ * a new ofname and save the original name in the compressed file.
+ */
+ if (to_stdout) {
+ ofd = fileno(stdout);
+ /* keep remove_ofname as zero */
+ } else {
+ if (create_outfile() != OK) return;
+
+ if (!decompress && save_orig_name && !verbose && !quiet) {
+ fprintf(stderr, "%s: %s compressed to %s\n",
+ progname, ifname, ofname);
+ }
+ }
+ /* Keep the name even if not truncated except with --no-name: */
+ 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"));
+ }
+
+ /* Actually do the compression/decompression. Loop over zipped members.
+ */
+ for (;;) {
+ if ((*work)(ifd, ofd) != OK) {
+ method = -1; /* force cleanup */
+ break;
+ }
+ if (!decompress || last_member || inptr == insize) break;
+ /* end of file */
+
+ method = get_method(ifd);
+ if (method < 0) break; /* error message already emitted */
+ bytes_out = 0; /* required for length check */
+ }
+
+ close(ifd);
+ if (!to_stdout && close(ofd)) {
+ write_error();
+ }
+ if (method == -1) {
+ if (!to_stdout) unlink (ofname);
+ return;
+ }
+ /* Display statistics */
+ 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");
+ }
+ /* Copy modes, times, ownership, and remove the input file */
+ if (!to_stdout) {
+ copy_stat(&istat);
+ }
+}
+
+/* ========================================================================
+ * Create the output file. Return OK or ERROR.
+ * Try several times if necessary to avoid truncating the z_suffix. For
+ * example, do not create a compressed file of name "1234567890123."
+ * Sets save_orig_name to true if the file name has been truncated.
+ * IN assertions: the input file has already been open (ifd is set) and
+ * ofname has already been updated if there was an original name.
+ * OUT assertions: ifd and ofd are closed in case of error.
+ */
+local int create_outfile()
+{
+ struct stat ostat; /* stat for ofname */
+ int flags = O_WRONLY | O_CREAT | O_EXCL | O_BINARY;
+
+ if (ascii && decompress) {
+ flags &= ~O_BINARY; /* force ascii text mode */
+ }
+ for (;;) {
+ /* Make sure that ofname is not an existing file */
+ if (check_ofname() != OK) {
+ close(ifd);
+ return ERROR;
+ }
+ /* Create the output file */
+ remove_ofname = 1;
+ ofd = OPEN(ofname, flags, RW_USER);
+ if (ofd == -1) {
+ perror(ofname);
+ close(ifd);
+ exit_code = ERROR;
+ return ERROR;
+ }
+
+ /* Check for name truncation on new file (1234567890123.gz) */
+#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) {
+ /* name might be too long if an original name was saved */
+ WARN((stderr, "%s: %s: warning, name truncated\n",
+ progname, ofname));
+ return OK;
+ }
+ close(ofd);
+ unlink(ofname);
+#ifdef NO_MULTIPLE_DOTS
+ /* Should never happen, see check_ofname() */
+ fprintf(stderr, "%s: %s: name too long\n", progname, ofname);
+ do_exit(ERROR);
+#endif
+ shorten_name(ofname);
+ }
+}
+
+/* ========================================================================
+ * Use lstat if available, except for -c or -f. Use stat otherwise.
+ * This allows links when not removing the original file.
+ */
+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);
+}
+
+/* ========================================================================
+ * Return a pointer to the 'z' suffix of a file name, or NULL. For all
+ * systems, ".gz", ".z", ".Z", ".taz", ".tgz", "-gz", "-z" and "_z" are
+ * accepted suffixes, in addition to the value of the --suffix option.
+ * ".tgz" is a useful convention for tar.z files on systems limited
+ * to 3 characters extensions. On such systems, ".?z" and ".??z" are
+ * 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;
+{
+ int nlen, slen;
+ char suffix[MAX_SUFFIX+3]; /* last chars of name, forced to lower case */
+ 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++; /* check long suffixes first */
+
+#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);
+ } 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;
+}
+
+
+/* ========================================================================
+ * Set ifname to the input file name (with a suffix appended if necessary)
+ * and istat to its stats. For decompression, if no file exists with the
+ * original name, try adding successively z_suffix, .gz, .z, -z and .Z.
+ * For MSDOS, we try only z_suffix and z.
+ * Return OK or ERROR.
+ */
+local int get_istat(iname, sbuf)
+ char *iname;
+ struct stat *sbuf;
+{
+ int ilen; /* strlen(ifname) */
+ static char *suffixes[] = {z_suffix, ".gz", ".z", "-z", ".Z", NULL};
+ char **suf = suffixes;
+ char *s;
+#ifdef NO_MULTIPLE_DOTS
+ char *dot; /* pointer to ifname extension, or NULL */
+#endif
+
+ strcpy(ifname, iname);
+
+ /* If input file exists, return OK. */
+ if (do_stat(ifname, sbuf) == 0) return OK;
+
+ if (!decompress || errno != ENOENT) {
+ perror(ifname);
+ exit_code = ERROR;
+ return ERROR;
+ }
+ /* file.ext doesn't exist, try adding a suffix (after removing any
+ * version number for VMS).
+ */
+ s = get_suffix(ifname);
+ if (s != NULL) {
+ perror(ifname); /* ifname already has z suffix and does not exist */
+ 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++;
+
+ /* Search for all suffixes */
+ do {
+ s = *suf;
+#ifdef NO_MULTIPLE_DOTS
+ if (*s == '.') s++;
+#endif
+#ifdef MAX_EXT_CHARS
+ strcpy(ifname, iname);
+ /* Needed if the suffixes are not sorted by increasing length */
+
+ 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);
+
+ /* No suffix found, complain using z_suffix: */
+#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;
+}
+
+/* ========================================================================
+ * Generate ofname given ifname. Return OK, or WARNING if file must be skipped.
+ * Sets save_orig_name to true if the file name has been truncated.
+ */
+local int make_ofname()
+{
+ char *suff; /* ofname z suffix */
+
+ strcpy(ofname, ifname);
+ /* strip a version number if any and get the gzip suffix if present: */
+ suff = get_suffix(ofname);
+
+ if (decompress) {
+ if (suff == NULL) {
+ /* Whith -t or -l, try all files (even without .gz suffix)
+ * except with -r (behave as with just -dr).
+ */
+ if (!recursive && (list || test)) return OK;
+
+ /* Avoid annoying messages with -r */
+ if (verbose || (!recursive && !quiet)) {
+ WARN((stderr,"%s: %s: unknown suffix -- ignored\n",
+ progname, ifname));
+ }
+ return WARNING;
+ }
+ /* Make a special case for .tgz and .taz: */
+ strlwr(suff);
+ if (strequ(suff, ".tgz") || strequ(suff, ".taz")) {
+ strcpy(suff, ".tar");
+ } else {
+ *suff = '\0'; /* strip the z suffix */
+ }
+ /* ofname might be changed later if infile contains an original name */
+
+ } else if (suff != NULL) {
+ /* Avoid annoying messages with -r (see treat_dir()) */
+ 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"); /* enough room */
+ return OK;
+ }
+ /* On the Atari and some versions of MSDOS, name_too_long()
+ * does not work correctly because of a bug in stat(). So we
+ * must truncate here.
+ */
+ } else if (strlen(suff)-1 + z_len > MAX_SUFFIX) {
+ suff[MAX_SUFFIX+1-z_len] = '\0';
+ save_orig_name = 1;
+# endif
+ }
+#endif /* NO_MULTIPLE_DOTS */
+ strcat(ofname, z_suffix);
+
+ } /* decompress ? */
+ return OK;
+}
+
+
+/* ========================================================================
+ * Check the magic number of the input file and update ofname if an
+ * 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.
+ * 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.
+ * If the member is a zip file, it must be the only one.
+ */
+local int get_method(in)
+ int in; /* input file descriptor */
+{
+ uch flags; /* compression flags */
+ char magic[2]; /* magic header */
+ ulg stamp; /* time stamp */
+
+ /* If --force and --stdout, zcat == cat, so do not complain about
+ * premature end of file: use try_byte instead of get_byte.
+ */
+ if (force && to_stdout) {
+ magic[0] = (char)try_byte();
+ magic[1] = (char)try_byte();
+ /* If try_byte returned EOF, magic[1] == 0xff */
+ } else {
+ magic[0] = (char)get_byte();
+ magic[1] = (char)get_byte();
+ }
+ method = -1; /* unknown yet */
+ part_nb++; /* number of parts in gzip file */
+ header_bytes = 0;
+ last_member = RECORD_IO;
+ /* assume multiple members in gzip file except for record oriented I/O */
+
+ 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(); /* Ignore extra flags for the moment */
+ (void)get_byte(); /* Ignore OS type for the moment */
+
+ 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();
+ }
+
+ /* Get original file name if it was truncated */
+ if ((flags & ORIG_NAME) != 0) {
+ if (no_name || (to_stdout && !list) || part_nb > 1) {
+ /* Discard the old name */
+ char c; /* dummy used for NeXTstep 3.0 cc optimizer bug */
+ do {c=get_byte();} while (c != 0);
+ } else {
+ /* Copy the base name. Keep a directory prefix intact. */
+ 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 necessary, adapt the name to local OS conventions: */
+ if (!list) {
+ MAKE_LEGAL_NAME(base);
+ if (base) list=0; /* avoid warning about unused variable */
+ }
+ } /* no_name || to_stdout */
+ } /* ORIG_NAME */
+
+ /* Discard file comment if any */
+ if ((flags & COMMENT) != 0) {
+ while (get_char() != 0) /* null */ ;
+ }
+ if (part_nb == 1) {
+ header_bytes = inptr + 2*sizeof(long); /* include crc and size */
+ }
+
+ } else if (memcmp(magic, PKZIP_MAGIC, 2) == 0 && inptr == 2
+ && memcmp((char*)inbuf, PKZIP_MAGIC, 4) == 0) {
+ /* To simplify the code, we support a zip file when alone only.
+ * We are thus guaranteed that the entire local header fits in inbuf.
+ */
+ inptr = 0;
+ work = unzip;
+ if (check_zipfile(in) != OK) return -1;
+ /* check_zipfile may get ofname from the local header */
+ 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) { /* pass input unchanged */
+ 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;
+ }
+}
+
+/* ========================================================================
+ * Display the characteristics of the compressed file.
+ * If the given method is < 0, display the accumulated totals.
+ * IN assertions: time_stamp, header_bytes and ifile_size are initialized.
+ */
+local void do_list(ifd, method)
+ int ifd; /* input file descriptor */
+ int method; /* compression method */
+{
+ ulg crc; /* original crc */
+ static int first_time = 1;
+ static char* methods[MAX_METHODS] = {
+ "store", /* 0 */
+ "compr", /* 1 */
+ "pack ", /* 2 */
+ "lzh ", /* 3 */
+ "", "", "", "", /* 4 to 7 reserved */
+ "defla"}; /* 8 */
+ 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);
+ /* header_bytes is not meaningful but used to ensure the same
+ * ratio if there is a single file.
+ */
+ printf(" (totals)\n");
+ return;
+ }
+ crc = (ulg)~0; /* unknown */
+ bytes_out = -1L;
+ bytes_in = ifile_size;
+
+#if RECORD_IO == 0
+ 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.
+ * Use "gunzip < foo.gz | wc -c" to get the uncompressed size if
+ * you are not concerned about speed.
+ */
+ 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 /* RECORD_IO */
+ date = ctime((time_t*)&time_stamp) + 4; /* skip the day of the week */
+ date[12] = '\0'; /* suppress the 1/100sec and the year */
+ 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);
+}
+
+/* ========================================================================
+ * Return true if the two stat structures correspond to the same file.
+ */
+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
+ /* Can't rely on st_ino and st_dev, use other fields: */
+ && 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
+ ;
+}
+
+/* ========================================================================
+ * Return true if a file name is ambiguous because the operating system
+ * truncates file names.
+ */
+local int name_too_long(name, statb)
+ char *name; /* file name to check */
+ struct stat *statb; /* stat buf for this file name */
+{
+ int s = strlen(name);
+ char c = name[s-1];
+ struct stat tstat; /* stat for truncated name */
+ int res;
+
+ tstat = *statb; /* Just in case OS does not fill all fields */
+ 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;
+}
+
+/* ========================================================================
+ * Shorten the given name by one character, or replace a .tar extension
+ * with .tgz. Truncate the last part of the name which is longer than
+ * MIN_PART characters: 1234.678.012.gz -> 123.678.012.gz. If the name
+ * has only parts shorter than MIN_PART truncate the longest part.
+ * For decompression, just remove the last character of the name.
+ *
+ * IN assertion: for compression, the suffix of the given name is z_suffix.
+ */
+local void shorten_name(name)
+ char *name;
+{
+ int len; /* length of name without z_suffix */
+ char *trunc = NULL; /* character to be truncated */
+ int plen; /* current part length */
+ int min_part = MIN_PART; /* current minimum part length */
+ 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;
+
+ /* compress 1234567890.tar to 1234567890.tgz */
+ if (len > 4 && strequ(p-4, ".tar")) {
+ strcpy(p-4, ".tgz");
+ return;
+ }
+ /* Try keeping short extensions intact:
+ * 1234.678.012.gz -> 123.678.012.gz
+ */
+ 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--; /* force truncation */
+ }
+ strcpy(trunc, z_suffix);
+}
+
+/* ========================================================================
+ * If compressing to a file, check if ofname is not ambiguous
+ * because the operating system truncates names. Otherwise, generate
+ * a new ofname and save the original name in the compressed file.
+ * If the compressed file already exists, ask for confirmation.
+ * The check for name truncation is made dynamically, because different
+ * file systems on the same OS might use different truncation rules (on SVR4
+ * s5 truncates to 14 chars and ufs does not truncate).
+ * This function returns -1 if the file must be skipped, and
+ * updates save_orig_name if necessary.
+ * IN assertions: save_orig_name is already set if ofname has been
+ * already truncated because of NO_MULTIPLE_DOTS. The input file has
+ * already been open and istat is set.
+ */
+local int check_ofname()
+{
+ struct stat ostat; /* stat for ofname */
+
+#ifdef ENAMETOOLONG
+ /* Check for strictly conforming Posix systems (which return ENAMETOOLONG
+ * instead of silently truncating filenames).
+ */
+ errno = 0;
+ while (stat(ofname, &ostat) != 0) {
+ if (errno != ENAMETOOLONG) return 0; /* ofname does not exist */
+ shorten_name(ofname);
+ }
+#else
+ if (stat(ofname, &ostat) != 0) return 0;
+#endif
+ /* Check for name truncation on existing file. Do this even on systems
+ * defining ENAMETOOLONG, because on most systems the strict Posix
+ * behavior is disabled by default (silent name truncation allowed).
+ */
+ if (!decompress && name_too_long(ofname, &ostat)) {
+ shorten_name(ofname);
+ if (stat(ofname, &ostat) != 0) return 0;
+ }
+
+ /* Check that the input and output files are different (could be
+ * the same by name truncation or links).
+ */
+ 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;
+ }
+ /* Ask permission to overwrite the existing file */
+ 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
+/* ========================================================================
+ * Set the access and modification times from the given stat buffer.
+ */
+local void reset_times (name, statb)
+ char *name;
+ struct stat *statb;
+{
+ struct utimbuf timep;
+
+ /* Copy the time stamp */
+ timep.actime = statb->st_atime;
+ timep.modtime = statb->st_mtime;
+
+ /* Some systems (at least OS/2) do not support utime on directories */
+ if (utime(name, &timep) && !S_ISDIR(statb->st_mode)) {
+ WARN((stderr, "%s: ", progname));
+ if (!quiet) perror(ofname);
+ }
+}
+#endif
+
+
+/* ========================================================================
+ * Copy modes, times, ownership from input file to output file.
+ * IN assertion: to_stdout is false.
+ */
+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
+ /* Copy the protection modes */
+ 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); /* Copy ownership */
+#endif
+ remove_ofname = 0;
+ /* It's now safe to remove the input file: */
+ (void) chmod(ifname, 0777);
+ if (unlink(ifname)) {
+ WARN((stderr, "%s: ", progname));
+ if (!quiet) perror(ifname);
+ }
+}
+
+#ifndef NO_DIR
+
+/* ========================================================================
+ * Recurse through the given directory. This code is taken from ncompress.
+ */
+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 ;
+ }
+ /*
+ ** WARNING: the following algorithm could occasionally cause
+ ** compress to produce error warnings of the form "<filename>.gz
+ ** already has .gz suffix - ignored". This occurs when the
+ ** .gz output file is inserted into the directory below
+ ** readdir's current pointer.
+ ** These warnings are harmless but annoying, so they are suppressed
+ ** with option -r (except when -v is on). An alternative
+ ** to allowing this would be to store the entire directory
+ ** list in memory, then compress the entries in the stored
+ ** list. Given the depth-first recursive algorithm used here,
+ ** this could use up a tremendous amount of memory. I don't
+ ** think it's worth it. -- Dave Mack
+ ** (An other alternative might be two passes to avoid depth-first.)
+ */
+
+ 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 /* 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;
+ }
+ 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 /* ? NO_DIR */
+
+/* ========================================================================
+ * Free all dynamically allocated variables and exit with the given code.
+ */
+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);
+}
+
+/* ========================================================================
+ * Signal and error handler.
+ */
+RETSIGTYPE abort_gzip()
+{
+ if (remove_ofname) {
+ close(ofd);
+ unlink (ofname);
+ }
+ do_exit(ERROR);
+}
projects / debian / gzip / commitdiff