1 /* $NetBSD: gzip.c,v 1.67 2004/09/11 11:07:44 dsl Exp $ */
2 /* $DragonFly: src/usr.bin/gzip/gzip.c,v 1.7 2007/12/06 19:54:52 hasso Exp $ */
5 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * gzip.c -- GPL free gzip using zlib.
35 * RFC 1950 covers the zlib format
36 * RFC 1951 covers the deflate format
37 * RFC 1952 covers the gzip format
40 * - use mmap where possible
41 * - handle some signals better (remove outfile?)
42 * - make bzip2/compress -v/-t/-l support work as well as possible
45 #include <sys/param.h>
64 #define PRIdOFF PRId64
71 /* what type of file are we dealing with */
74 #ifndef NO_BZIP2_SUPPORT
77 #ifndef NO_COMPRESS_SUPPORT
84 #ifndef NO_BZIP2_SUPPORT
87 #define BZ2_SUFFIX ".bz2"
88 #define BZIP2_MAGIC "\102\132\150"
91 #ifndef NO_COMPRESS_SUPPORT
93 #define Z_MAGIC "\037\235"
96 #define GZ_SUFFIX ".gz"
98 #define BUFLEN (64 * 1024)
100 #define GZIP_MAGIC0 0x1F
101 #define GZIP_MAGIC1 0x8B
102 #define GZIP_OMAGIC1 0x9E
104 #define GZIP_TIMESTAMP (off_t)4
105 #define GZIP_ORIGNAME (off_t)10
107 #define HEAD_CRC 0x02
108 #define EXTRA_FIELD 0x04
109 #define ORIG_NAME 0x08
112 #define OS_CODE 3 /* Unix */
117 const char *normal; /* for unzip - must not be longer than zipped */
119 static suffixes_t suffixes[] = {
120 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
121 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
123 SUFFIX(GZ_SUFFIX, ""),
128 SUFFIX(".taz", ".tar"),
129 SUFFIX(".tgz", ".tar"),
130 #ifndef NO_BZIP2_SUPPORT
131 SUFFIX(BZ2_SUFFIX, ""),
133 #ifndef NO_COMPRESS_SUPPORT
134 SUFFIX(Z_SUFFIX, ""),
136 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
140 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
142 static const char gzip_version[] = "NetBSD gzip 20040830";
144 static int cflag; /* stdout mode */
145 static int dflag; /* decompress mode */
146 static int lflag; /* list mode */
147 static int numflag = 6; /* gzip -1..-9 value */
150 static int fflag; /* force mode */
151 static int kflag; /* don't delete input files */
152 static int nflag; /* don't save name/timestamp */
153 static int Nflag; /* don't restore name/timestamp */
154 static int qflag; /* quiet mode */
155 static int rflag; /* recursive mode */
156 static int tflag; /* test */
157 static int vflag; /* verbose mode */
163 static int exit_value = 0; /* exit value */
165 static char *infile; /* name of file coming in */
167 static void maybe_err(const char *fmt, ...)
168 __attribute__((__format__(__printf__, 1, 2)));
169 #ifndef NO_BZIP2_SUPPORT
170 static void maybe_errx(const char *fmt, ...)
171 __attribute__((__format__(__printf__, 1, 2)));
173 static void maybe_warn(const char *fmt, ...)
174 __attribute__((__format__(__printf__, 1, 2)));
175 static void maybe_warnx(const char *fmt, ...)
176 __attribute__((__format__(__printf__, 1, 2)));
177 static enum filetype file_gettype(u_char *);
179 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
181 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
182 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
183 static off_t file_compress(char *, char *, size_t);
184 static off_t file_uncompress(char *, char *, size_t);
185 static void handle_pathname(char *);
186 static void handle_file(char *, struct stat *);
187 static void handle_stdin(void);
188 static void handle_stdout(void);
189 static void print_ratio(off_t, off_t, FILE *);
190 static void print_list(int fd, off_t, const char *, time_t);
191 static void usage(void);
192 static void display_version(void);
193 static const suffixes_t *check_suffix(char *, int);
196 #define unlink_input(f, sb) unlink(f)
198 static off_t cat_fd(unsigned char *, ssize_t, off_t *, int fd);
199 static void prepend_gzip(char *, int *, char ***);
200 static void handle_dir(char *);
201 static void print_verbage(const char *, const char *, off_t, off_t);
202 static void print_test(const char *, int);
203 static void copymodes(const char *, struct stat *);
204 static int check_outfile(const char *outfile, struct stat *sb);
207 #ifndef NO_BZIP2_SUPPORT
208 static off_t unbzip2(int, int, char *, size_t, off_t *);
211 #ifndef NO_COMPRESS_SUPPORT
212 static FILE *zdopen(int);
213 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
216 int main(int, char *p[]);
219 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
221 static const struct option longopts[] = {
222 { "stdout", no_argument, 0, 'c' },
223 { "to-stdout", no_argument, 0, 'c' },
224 { "decompress", no_argument, 0, 'd' },
225 { "uncompress", no_argument, 0, 'd' },
226 { "force", no_argument, 0, 'f' },
227 { "help", no_argument, 0, 'h' },
228 { "keep", no_argument, 0, 'k' },
229 { "list", no_argument, 0, 'l' },
230 { "no-name", no_argument, 0, 'n' },
231 { "name", no_argument, 0, 'N' },
232 { "quiet", no_argument, 0, 'q' },
233 { "recursive", no_argument, 0, 'r' },
234 { "suffix", required_argument, 0, 'S' },
235 { "test", no_argument, 0, 't' },
236 { "verbose", no_argument, 0, 'v' },
237 { "version", no_argument, 0, 'V' },
238 { "fast", no_argument, 0, '1' },
239 { "best", no_argument, 0, '9' },
242 * This is what else GNU gzip implements. --ascii isn't useful
243 * on NetBSD, and I don't care to have a --license.
245 { "ascii", no_argument, 0, 'a' },
246 { "license", no_argument, 0, 'L' },
248 { NULL, no_argument, 0, 0 },
253 main(int argc, char **argv)
255 const char *progname = getprogname();
262 /* XXX set up signals */
265 if ((gzip = getenv("GZIP")) != NULL)
266 prepend_gzip(gzip, &argc, &argv);
271 * handle being called `gunzip', `zcat' and `gzcat'
273 if (strcmp(progname, "gunzip") == 0)
275 else if (strcmp(progname, "zcat") == 0 ||
276 strcmp(progname, "gzcat") == 0)
280 #define OPT_LIST "cdhHltV123456789"
282 #define OPT_LIST "cdfhHklnNqrS:tvV123456789"
285 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
300 case '1': case '2': case '3':
301 case '4': case '5': case '6':
302 case '7': case '8': case '9':
327 len = strlen(optarg);
329 suffixes[0].zipped = optarg;
330 suffixes[0].ziplen = len;
332 suffixes[NUM_SUFFIXES - 1].zipped = "";
333 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
354 if (dflag) /* stdin mode */
356 else /* stdout mode */
360 handle_pathname(argv[0]);
364 if (qflag == 0 && lflag && argc > 1)
365 print_list(-1, 0, "(totals)", 0);
370 /* maybe print a warning */
372 maybe_warn(const char *fmt, ...)
385 /* ... without an errno. */
387 maybe_warnx(const char *fmt, ...)
400 /* maybe print an error */
402 maybe_err(const char *fmt, ...)
414 #ifndef NO_BZIP2_SUPPORT
415 /* ... without an errno. */
417 maybe_errx(const char *fmt, ...)
431 /* split up $GZIP and prepend it to the argument list */
433 prepend_gzip(char *gzip, int *argc, char ***argv)
435 char *s, **nargv, **ac;
438 /* scan how many arguments there are */
440 while (*s == ' ' || *s == '\t')
445 while (*s != ' ' && *s != '\t')
457 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
461 /* stash this away */
464 /* copy the program name first */
466 nargv[i++] = *(ac++);
468 /* take a copy of $GZIP and add it to the array */
473 /* Skip whitespaces. */
474 while (*s == ' ' || *s == '\t')
479 /* Find the end of this argument. */
480 while (*s != ' ' && *s != '\t')
482 /* Argument followed by NUL. */
484 /* Terminate by overwriting ' ' or '\t' with NUL. */
489 /* copy the original arguments and a NULL */
491 nargv[i++] = *(ac++);
496 /* compress input to output. Return bytes read, -1 on error */
498 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
501 char *outbufp, *inbufp;
502 off_t in_tot = 0, out_tot = 0;
507 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
512 outbufp = malloc(BUFLEN);
513 inbufp = malloc(BUFLEN);
514 if (outbufp == NULL || inbufp == NULL) {
515 maybe_err("malloc failed");
519 memset(&z, 0, sizeof z);
525 memcpy(outbufp, header, sizeof header);
533 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
534 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
535 *origname ? ORIG_NAME : 0,
538 (mtime >> 16) & 0xff,
539 (mtime >> 24) & 0xff,
540 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
543 /* this need PATH_MAX > BUFLEN ... */
544 maybe_err("snprintf");
549 z.next_out = outbufp + i;
550 z.avail_out = BUFLEN - i;
552 error = deflateInit2(&z, numflag, Z_DEFLATED,
553 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
555 maybe_warnx("deflateInit2 failed");
560 crc = crc32(0L, Z_NULL, 0);
562 if (z.avail_out == 0) {
563 if (write(out, outbufp, BUFLEN) != BUFLEN) {
570 z.next_out = outbufp;
571 z.avail_out = BUFLEN;
574 if (z.avail_in == 0) {
575 in_size = read(in, inbufp, BUFLEN);
584 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
587 z.avail_in = in_size;
590 error = deflate(&z, Z_NO_FLUSH);
591 if (error != Z_OK && error != Z_STREAM_END) {
592 maybe_warnx("deflate failed");
602 error = deflate(&z, Z_FINISH);
603 if (error != Z_OK && error != Z_STREAM_END) {
604 maybe_warnx("deflate failed");
609 len = (char *)z.next_out - outbufp;
611 if (write(out, outbufp, len) != len) {
617 z.next_out = outbufp;
618 z.avail_out = BUFLEN;
620 if (error == Z_STREAM_END)
624 if (deflateEnd(&z) != Z_OK) {
625 maybe_warnx("deflateEnd failed");
630 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
632 (int)(crc >> 8) & 0xff,
633 (int)(crc >> 16) & 0xff,
634 (int)(crc >> 24) & 0xff,
636 (int)(in_tot >> 8) & 0xff,
637 (int)(in_tot >> 16) & 0xff,
638 (int)(in_tot >> 24) & 0xff);
640 maybe_err("snprintf");
641 if (write(out, outbufp, i) != i) {
658 * uncompress input to output then close the input. return the
659 * uncompressed size written, and put the compressed sized read
663 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
664 const char *filename)
667 char *outbufp, *inbufp;
668 off_t out_tot = prelen, in_tot = 0;
669 uint32_t out_sub_tot = 0;
687 } state = GZSTATE_MAGIC0;
688 int flags = 0, skip_count = 0;
689 int error = 0, done_reading = 0;
693 #define ADVANCE() { z.next_in++; z.avail_in--; }
695 if ((outbufp = malloc(BUFLEN)) == NULL) {
696 maybe_err("malloc failed");
699 if ((inbufp = malloc(BUFLEN)) == NULL) {
700 maybe_err("malloc failed");
704 memset(&z, 0, sizeof z);
707 z.avail_out = BUFLEN;
708 z.next_out = outbufp;
715 if (z.avail_in == 0 && done_reading == 0) {
716 ssize_t in_size = read(in, inbufp, BUFLEN);
721 print_test(filename, 0);
723 maybe_warn("failed to read stdin");
726 } else if (in_size == 0)
729 z.avail_in = in_size;
734 if (z.avail_in == 0) {
735 if (done_reading && state != GZSTATE_MAGIC0)
736 maybe_warnx("%s: unexpected end of file",
742 if (*z.next_in != GZIP_MAGIC0) {
743 maybe_warnx("input not gziped (MAGIC0)");
750 crc = crc32(0L, Z_NULL, 0);
754 if (*z.next_in != GZIP_MAGIC1 &&
755 *z.next_in != GZIP_OMAGIC1) {
756 maybe_warnx("input not gziped (MAGIC1)");
765 if (*z.next_in != Z_DEFLATED) {
766 maybe_warnx("unknown compression method");
781 case GZSTATE_SKIPPING:
782 if (skip_count > 0) {
790 if ((flags & EXTRA_FIELD) == 0) {
791 state = GZSTATE_ORIGNAME;
794 skip_count = *z.next_in;
800 skip_count |= ((*z.next_in) << 8);
806 if (skip_count > 0) {
813 case GZSTATE_ORIGNAME:
814 if ((flags & ORIG_NAME) == 0) {
823 case GZSTATE_COMMENT:
824 if ((flags & COMMENT) == 0) {
833 case GZSTATE_HEAD_CRC1:
834 if (flags & HEAD_CRC)
841 case GZSTATE_HEAD_CRC2:
842 if (skip_count > 0) {
850 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
851 maybe_warnx("failed to inflateInit");
859 error = inflate(&z, Z_FINISH);
860 /* Z_BUF_ERROR goes with Z_FINISH... */
861 if (error != Z_STREAM_END && error != Z_BUF_ERROR)
862 /* Just need more input */
864 wr = BUFLEN - z.avail_out;
867 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
870 /* don't write anything with -t */
873 write(out, outbufp, wr) != wr) {
874 maybe_warn("error writing to output");
883 if (error == Z_STREAM_END) {
888 z.next_out = outbufp;
889 z.avail_out = BUFLEN;
894 static int empty_buffer = 0;
897 if (z.avail_in < 4) {
898 if (!done_reading && empty_buffer++ < 4)
900 maybe_warnx("truncated input");
905 origcrc = ((unsigned)z.next_in[0] & 0xff) |
906 ((unsigned)z.next_in[1] & 0xff) << 8 |
907 ((unsigned)z.next_in[2] & 0xff) << 16 |
908 ((unsigned)z.next_in[3] & 0xff) << 24;
909 if (origcrc != crc) {
910 maybe_warnx("invalid compressed"
926 static int empty_buffer = 0;
929 if (z.avail_in < 4) {
930 if (!done_reading && empty_buffer++ < 4)
932 maybe_warnx("truncated input");
937 origlen = ((unsigned)z.next_in[0] & 0xff) |
938 ((unsigned)z.next_in[1] & 0xff) << 8 |
939 ((unsigned)z.next_in[2] & 0xff) << 16 |
940 ((unsigned)z.next_in[3] & 0xff) << 24;
942 if (origlen != out_sub_tot) {
943 maybe_warnx("invalid compressed"
944 " data--length error");
954 maybe_warnx("decompression error");
958 state = GZSTATE_MAGIC0;
965 if (state > GZSTATE_INIT)
970 print_test(filename, out_tot != -1);
984 * set the owner, mode, flags & utimes for a file
987 copymodes(const char *file, struct stat *sbp)
989 struct timeval times[2];
992 * If we have no info on the input, give this file some
993 * default values and return..
996 mode_t mask = umask(022);
998 (void)chmod(file, DEFFILEMODE & ~mask);
1003 /* if the chown fails, remove set-id bits as-per compress(1) */
1004 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) {
1006 maybe_warn("couldn't chown: %s", file);
1007 sbp->st_mode &= ~(S_ISUID|S_ISGID);
1010 /* we only allow set-id and the 9 normal permission bits */
1011 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1012 if (chmod(file, sbp->st_mode) < 0)
1013 maybe_warn("couldn't chmod: %s", file);
1015 /* only try flags if they exist already */
1016 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0)
1017 maybe_warn("couldn't chflags: %s", file);
1019 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec);
1020 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec);
1021 if (utimes(file, times) < 0)
1022 maybe_warn("couldn't utimes: %s", file);
1026 /* what sort of file is this? */
1027 static enum filetype
1028 file_gettype(u_char *buf)
1031 if (buf[0] == GZIP_MAGIC0 &&
1032 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1035 #ifndef NO_BZIP2_SUPPORT
1036 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1037 buf[3] >= '0' && buf[3] <= '9')
1041 #ifndef NO_COMPRESS_SUPPORT
1042 if (memcmp(buf, Z_MAGIC, 2) == 0)
1050 /* check the outfile is OK. */
1052 check_outfile(const char *outfile, struct stat *sb)
1056 if (lflag == 0 && stat(outfile, sb) == 0) {
1059 else if (isatty(STDIN_FILENO)) {
1060 char ans[10] = { 'n', '\0' }; /* default */
1062 fprintf(stderr, "%s already exists -- do you wish to "
1063 "overwrite (y or n)? " , outfile);
1064 (void)fgets(ans, sizeof(ans) - 1, stdin);
1065 if (ans[0] != 'y' && ans[0] != 'Y') {
1066 fprintf(stderr, "\tnot overwriting\n");
1071 maybe_warnx("%s already exists -- skipping", outfile);
1079 unlink_input(const char *file, struct stat *sb)
1086 if (stat(file, &nsb) != 0)
1087 /* Must be gone alrady */
1089 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1090 /* Definitely a different file */
1096 static const suffixes_t *
1097 check_suffix(char *file, int xlate)
1099 const suffixes_t *s;
1100 int len = strlen(file);
1103 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1104 /* if it doesn't fit in "a.suf", don't bother */
1105 if (s->ziplen >= len)
1107 sp = file + len - s->ziplen;
1108 if (strcmp(s->zipped, sp) != 0)
1111 strcpy(sp, s->normal);
1118 * compress the given file: create a corresponding .gz file and remove the
1122 file_compress(char *file, char *outfile, size_t outsize)
1128 struct stat isb, osb;
1129 const suffixes_t *suff;
1132 in = open(file, O_RDONLY);
1134 maybe_warn("can't open %s", file);
1140 if (stat(file, &isb) == 0) {
1141 if (isb.st_nlink > 1 && fflag == 0) {
1142 maybe_warnx("%s has %d other link%s -- "
1143 "skipping", file, isb.st_nlink - 1,
1144 isb.st_nlink == 1 ? "" : "s");
1150 if (fflag == 0 && (suff = check_suffix(file, 0))
1151 && suff->zipped[0] != 0) {
1152 maybe_warnx("%s already has %s suffix -- unchanged",
1153 file, suff->zipped);
1159 /* Add (usually) .gz to filename */
1160 if ((size_t)snprintf(outfile, outsize, "%s%s",
1161 file, suffixes[0].zipped) >= outsize)
1162 memcpy(outfile - suffixes[0].ziplen - 1,
1163 suffixes[0].zipped, suffixes[0].ziplen + 1);
1166 if (check_outfile(outfile, &osb) == 0) {
1174 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1176 maybe_warn("could not create output: %s", outfile);
1181 out = STDOUT_FILENO;
1183 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1188 * If there was an error, insize will be -1.
1189 * If we compressed to stdout, just return the size.
1190 * Otherwise stat the file and check it is the correct size.
1191 * We only blow away the file if we can stat the output and it
1192 * has the expected size.
1195 return insize == -1 ? -1 : size;
1197 if (close(out) == -1)
1198 maybe_warn("couldn't close ouput");
1201 if (stat(outfile, &osb) < 0) {
1202 maybe_warn("couldn't stat: %s", outfile);
1206 if (osb.st_size != size) {
1207 maybe_warnx("output file: %s wrong size (%" PRIdOFF
1208 " != %" PRIdOFF "), deleting",
1209 outfile, osb.st_size, size);
1213 copymodes(outfile, &isb);
1216 /* output is good, ok to delete input */
1217 unlink_input(file, &isb);
1222 maybe_warnx("leaving original %s", file);
1228 /* uncompress the given file and remove the original */
1230 file_uncompress(char *file, char *outfile, size_t outsize)
1232 struct stat isb, osb;
1235 unsigned char header1[4];
1236 enum filetype method;
1239 time_t timestamp = 0;
1240 unsigned char name[PATH_MAX + 1];
1243 /* gather the old name info */
1245 fd = open(file, O_RDONLY);
1247 maybe_warn("can't open %s", file);
1251 strlcpy(outfile, file, outsize);
1252 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1253 maybe_warnx("%s: unknown suffix -- ignored", file);
1257 rbytes = read(fd, header1, sizeof header1);
1258 if (rbytes != sizeof header1) {
1259 /* we don't want to fail here. */
1265 maybe_warn("can't read %s", file);
1267 maybe_warnx("%s: unexpected end of file", file);
1271 method = file_gettype(header1);
1274 if (fflag == 0 && method == FT_UNKNOWN) {
1275 maybe_warnx("%s: not in gzip format", file);
1282 if (method == FT_GZIP && Nflag) {
1283 unsigned char ts[4]; /* timestamp */
1285 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) {
1287 maybe_warn("can't read %s", file);
1290 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1292 if (header1[3] & ORIG_NAME) {
1293 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
1295 maybe_warn("can't read %s", file);
1299 /* preserve original directory name */
1300 char *dp = strrchr(file, '/');
1305 snprintf(outfile, outsize, "%.*s%.*s",
1307 file, (int) rbytes, name);
1312 lseek(fd, 0, SEEK_SET);
1314 if (cflag == 0 || lflag) {
1315 if (fstat(fd, &isb) != 0)
1318 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1319 maybe_warnx("%s has %d other links -- skipping",
1320 file, isb.st_nlink - 1);
1323 if (nflag == 0 && timestamp)
1324 isb.st_mtime = timestamp;
1325 if (check_outfile(outfile, &osb) == 0)
1330 if (cflag == 0 && lflag == 0) {
1331 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1332 if (zfd == STDOUT_FILENO) {
1333 /* We won't close STDOUT_FILENO later... */
1335 close(STDOUT_FILENO);
1338 maybe_warn("can't open %s", outfile);
1342 zfd = STDOUT_FILENO;
1344 #ifndef NO_BZIP2_SUPPORT
1345 if (method == FT_BZIP2) {
1349 maybe_warnx("no -l with bzip2 files");
1353 size = unbzip2(fd, zfd, NULL, 0, NULL);
1357 #ifndef NO_COMPRESS_SUPPORT
1358 if (method == FT_Z) {
1363 maybe_warnx("no -l with Lempel-Ziv files");
1367 if ((in = zdopen(fd)) == NULL) {
1368 maybe_warn("zdopen for read: %s", file);
1372 out = fdopen(dup(zfd), "w");
1374 maybe_warn("fdopen for write: %s", outfile);
1379 size = zuncompress(in, out, NULL, 0, NULL);
1380 /* need to fclose() if ferror() is true... */
1381 if (ferror(in) | fclose(in)) {
1382 maybe_warn("failed infile fclose");
1386 if (fclose(out) != 0) {
1387 maybe_warn("failed outfile fclose");
1395 if (method == FT_UNKNOWN) {
1397 maybe_warnx("no -l for unknown filetypes");
1400 size = cat_fd(NULL, 0, NULL, fd);
1405 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1407 return -1; /* XXX */
1410 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1414 maybe_warn("couldn't close input");
1415 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1416 maybe_warn("couldn't close output");
1421 maybe_warnx("%s: uncompress failed", file);
1425 /* if testing, or we uncompressed to stdout, this is all we need */
1430 /* if we are uncompressing to stdin, don't remove the file. */
1435 * if we create a file...
1438 * if we can't stat the file don't remove the file.
1440 if (stat(outfile, &osb) < 0) {
1441 maybe_warn("couldn't stat (leaving original): %s",
1445 if (osb.st_size != size) {
1446 maybe_warn("stat gave different size: %" PRIdOFF
1447 " != %" PRIdOFF " (leaving original)",
1452 unlink_input(file, &isb);
1454 copymodes(outfile, &isb);
1461 if (zfd != -1 && zfd != STDOUT_FILENO)
1468 cat_fd(unsigned char * prepend, ssize_t count, off_t *gsizep, int fd)
1475 if (write(STDOUT_FILENO, prepend, count) != count) {
1476 maybe_warn("write to stdout");
1480 rv = read(fd, buf, sizeof buf);
1484 maybe_warn("read from fd %d", fd);
1488 if (write(STDOUT_FILENO, buf, rv) != rv) {
1489 maybe_warn("write to stdout");
1504 unsigned char header1[4];
1506 enum filetype method;
1507 #ifndef NO_COMPRESS_SUPPORT
1512 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1513 maybe_warnx("standard input is a terminal -- ignoring");
1521 /* XXX could read the whole file, etc. */
1522 if (fstat(STDIN_FILENO, &isb) < 0) {
1523 maybe_warn("fstat");
1526 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1530 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) {
1531 maybe_warn("can't read stdin");
1535 method = file_gettype(header1);
1540 maybe_warnx("unknown compression format");
1543 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1547 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1548 header1, sizeof header1, &gsize, "(stdin)");
1550 #ifndef NO_BZIP2_SUPPORT
1552 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1553 header1, sizeof header1, &gsize);
1556 #ifndef NO_COMPRESS_SUPPORT
1558 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1559 maybe_warnx("zopen of stdin");
1563 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
1570 if (vflag && !tflag && usize != -1 && gsize != -1)
1571 print_verbage(NULL, NULL, usize, gsize);
1582 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1583 maybe_warnx("standard output is a terminal -- ignoring");
1587 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0);
1590 if (vflag && !tflag && usize != -1 && gsize != -1)
1591 print_verbage(NULL, NULL, usize, gsize);
1595 /* do what is asked for, for the path name */
1597 handle_pathname(char *path)
1599 char *opath = path, *s = NULL;
1604 /* check for stdout/stdin */
1605 if (path[0] == '-' && path[1] == '\0') {
1614 if (stat(path, &sb) < 0) {
1615 /* lets try <path>.gz if we're decompressing */
1616 if (dflag && s == NULL && errno == ENOENT) {
1618 slen = suffixes[0].ziplen;
1619 s = malloc(len + slen + 1);
1621 maybe_err("malloc");
1622 memcpy(s, path, len);
1623 memcpy(s + len, suffixes[0].zipped, slen + 1);
1627 maybe_warn("can't stat: %s", opath);
1631 if (S_ISDIR(sb.st_mode)) {
1637 maybe_warnx("%s is a directory", path);
1641 if (S_ISREG(sb.st_mode))
1642 handle_file(path, &sb);
1644 maybe_warnx("%s is not a regular file", path);
1651 /* compress/decompress a file */
1653 handle_file(char *file, struct stat *sbp)
1656 char outfile[PATH_MAX];
1660 usize = file_uncompress(file, outfile, sizeof(outfile));
1663 gsize = sbp->st_size;
1665 gsize = file_compress(file, outfile, sizeof(outfile));
1668 usize = sbp->st_size;
1673 if (vflag && !tflag)
1674 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1679 /* this is used with -r to recursively descend directories */
1681 handle_dir(char *dir)
1689 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
1691 warn("couldn't fts_open %s", dir);
1695 while ((entry = fts_read(fts))) {
1696 switch(entry->fts_info) {
1704 maybe_warn("%s", entry->fts_path);
1707 handle_file(entry->fts_path, entry->fts_statp);
1710 (void)fts_close(fts);
1714 /* print a ratio - size reduction as a fraction of uncompressed size */
1716 print_ratio(off_t in, off_t out, FILE *where)
1718 int percent10; /* 10 * percent */
1726 * Output is more than double size of input! print -99.9%
1727 * Quite possibly we've failed to get the original size.
1732 * We only need 12 bits of result from the final division,
1733 * so reduce the values until a 32bit division will suffice.
1735 while (in > 0x100000) {
1740 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1745 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1746 /* Move the '.' to before the last digit */
1747 buff[len - 1] = buff[len - 2];
1748 buff[len - 2] = '.';
1749 fprintf(where, "%5s%%", buff);
1753 /* print compression statistics, and the new name (if there is one!) */
1755 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1758 fprintf(stderr, "%s:%s ", file,
1759 strlen(file) < 7 ? "\t\t" : "\t");
1760 print_ratio(usize, gsize, stderr);
1762 fprintf(stderr, " -- replaced with %s", nfile);
1763 fprintf(stderr, "\n");
1767 /* print test results */
1769 print_test(const char *file, int ok)
1772 if (exit_value == 0 && ok == 0)
1774 fprintf(stderr, "%s:%s %s\n", file,
1775 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
1780 /* print a file's info ala --list */
1782 compressed uncompressed ratio uncompressed_name
1783 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
1786 print_list(int fd, off_t out, const char *outfile, time_t ts)
1788 static int first = 1;
1790 static off_t in_tot, out_tot;
1799 printf("method crc date time ");
1802 printf(" compressed uncompressed "
1803 "ratio uncompressed_name\n");
1815 /* read the last 4 bytes - this is the uncompressed size */
1816 rv = lseek(fd, (off_t)(-8), SEEK_END);
1818 unsigned char buf[8];
1821 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf))
1822 maybe_warn("read of uncompressed size");
1823 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24;
1826 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24;
1832 if (vflag && fd == -1)
1835 char *date = ctime(&ts);
1837 /* skip the day, 1/100th second, and year */
1840 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
1845 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
1846 print_ratio(in, out, stdout);
1847 printf(" %s\n", outfile);
1850 /* display the usage of NetBSD gzip */
1855 fprintf(stderr, "%s\n", gzip_version);
1858 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n",
1860 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
1861 " -c --stdout write to stdout, keep original files\n"
1863 " -d --decompress uncompress files\n"
1865 " -f --force force overwriting & compress links\n"
1866 " -h --help display this help\n"
1867 " -k --keep don't delete input files during operation\n"
1868 " -n --no-name don't save original file name or time stamp\n"
1869 " -N --name save or restore original file name and time stamp\n"
1870 " -q --quiet output no warnings\n"
1871 " -r --recursive recursively compress files in directories\n"
1872 " -S .suf use suffix .suf instead of .gz\n"
1874 " -t --test test compressed file\n"
1875 " -v --verbose print extra statistics\n"
1876 " -V --version display program version\n"
1877 " -1 --fast fastest (worst) compression\n"
1878 " -2 .. -8 set compression level\n"
1879 " -9 --best best (slowest) compression\n",
1885 /* display the version of NetBSD gzip */
1887 display_version(void)
1890 fprintf(stderr, "%s\n", gzip_version);
1894 #ifndef NO_BZIP2_SUPPORT
1895 #include "unbzip2.c"
1897 #ifndef NO_COMPRESS_SUPPORT
1898 #include "zuncompress.c"