1 /* $NetBSD: gzip.c,v 1.67 2004/09/11 11:07:44 dsl Exp $ */
2 /* $DragonFly: src/usr.bin/gzip/gzip.c,v 1.5 2005/01/31 19:28:57 y0netan1 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 nflag; /* don't save name/timestamp */
152 static int Nflag; /* don't restore name/timestamp */
153 static int qflag; /* quiet mode */
154 static int rflag; /* recursive mode */
155 static int tflag; /* test */
156 static int vflag; /* verbose mode */
162 static int exit_value = 0; /* exit value */
164 static char *infile; /* name of file coming in */
166 static void maybe_err(const char *fmt, ...)
167 __attribute__((__format__(__printf__, 1, 2)));
168 #ifndef NO_BZIP2_SUPPORT
169 static void maybe_errx(const char *fmt, ...)
170 __attribute__((__format__(__printf__, 1, 2)));
172 static void maybe_warn(const char *fmt, ...)
173 __attribute__((__format__(__printf__, 1, 2)));
174 static void maybe_warnx(const char *fmt, ...)
175 __attribute__((__format__(__printf__, 1, 2)));
176 static enum filetype file_gettype(u_char *);
178 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
180 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
181 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
182 static off_t file_compress(char *, char *, size_t);
183 static off_t file_uncompress(char *, char *, size_t);
184 static void handle_pathname(char *);
185 static void handle_file(char *, struct stat *);
186 static void handle_stdin(void);
187 static void handle_stdout(void);
188 static void print_ratio(off_t, off_t, FILE *);
189 static void print_list(int fd, off_t, const char *, time_t);
190 static void usage(void);
191 static void display_version(void);
192 static const suffixes_t *check_suffix(char *, int);
195 #define unlink_input(f, sb) unlink(f)
197 static off_t cat_fd(unsigned char *, ssize_t, off_t *, int fd);
198 static void prepend_gzip(char *, int *, char ***);
199 static void handle_dir(char *);
200 static void print_verbage(const char *, const char *, off_t, off_t);
201 static void print_test(const char *, int);
202 static void copymodes(const char *, struct stat *);
203 static int check_outfile(const char *outfile, struct stat *sb);
206 #ifndef NO_BZIP2_SUPPORT
207 static off_t unbzip2(int, int, char *, size_t, off_t *);
210 #ifndef NO_COMPRESS_SUPPORT
211 static FILE *zdopen(int);
212 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
215 int main(int, char *p[]);
218 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
220 static const struct option longopts[] = {
221 { "stdout", no_argument, 0, 'c' },
222 { "to-stdout", no_argument, 0, 'c' },
223 { "decompress", no_argument, 0, 'd' },
224 { "uncompress", no_argument, 0, 'd' },
225 { "force", no_argument, 0, 'f' },
226 { "help", no_argument, 0, 'h' },
227 { "list", no_argument, 0, 'l' },
228 { "no-name", no_argument, 0, 'n' },
229 { "name", no_argument, 0, 'N' },
230 { "quiet", no_argument, 0, 'q' },
231 { "recursive", no_argument, 0, 'r' },
232 { "suffix", required_argument, 0, 'S' },
233 { "test", no_argument, 0, 't' },
234 { "verbose", no_argument, 0, 'v' },
235 { "version", no_argument, 0, 'V' },
236 { "fast", no_argument, 0, '1' },
237 { "best", no_argument, 0, '9' },
240 * This is what else GNU gzip implements. --ascii isn't useful
241 * on NetBSD, and I don't care to have a --license.
243 { "ascii", no_argument, 0, 'a' },
244 { "license", no_argument, 0, 'L' },
246 { NULL, no_argument, 0, 0 },
251 main(int argc, char **argv)
253 const char *progname = getprogname();
260 /* XXX set up signals */
263 if ((gzip = getenv("GZIP")) != NULL)
264 prepend_gzip(gzip, &argc, &argv);
269 * handle being called `gunzip', `zcat' and `gzcat'
271 if (strcmp(progname, "gunzip") == 0)
273 else if (strcmp(progname, "zcat") == 0 ||
274 strcmp(progname, "gzcat") == 0)
278 #define OPT_LIST "cdhHltV123456789"
280 #define OPT_LIST "cdfhHlnNqrS:tvV123456789"
283 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
298 case '1': case '2': case '3':
299 case '4': case '5': case '6':
300 case '7': case '8': case '9':
322 len = strlen(optarg);
324 suffixes[0].zipped = optarg;
325 suffixes[0].ziplen = len;
327 suffixes[NUM_SUFFIXES - 1].zipped = "";
328 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
349 if (dflag) /* stdin mode */
351 else /* stdout mode */
355 handle_pathname(argv[0]);
359 if (qflag == 0 && lflag && argc > 1)
360 print_list(-1, 0, "(totals)", 0);
365 /* maybe print a warning */
367 maybe_warn(const char *fmt, ...)
380 /* ... without an errno. */
382 maybe_warnx(const char *fmt, ...)
395 /* maybe print an error */
397 maybe_err(const char *fmt, ...)
409 #ifndef NO_BZIP2_SUPPORT
410 /* ... without an errno. */
412 maybe_errx(const char *fmt, ...)
426 /* split up $GZIP and prepend it to the argument list */
428 prepend_gzip(char *gzip, int *argc, char ***argv)
430 char *s, **nargv, **ac;
433 /* scan how many arguments there are */
435 while (*s == ' ' || *s == '\t')
440 while (*s != ' ' && *s != '\t')
452 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
456 /* stash this away */
459 /* copy the program name first */
461 nargv[i++] = *(ac++);
463 /* take a copy of $GZIP and add it to the array */
468 /* Skip whitespaces. */
469 while (*s == ' ' || *s == '\t')
474 /* Find the end of this argument. */
475 while (*s != ' ' && *s != '\t')
477 /* Argument followed by NUL. */
479 /* Terminate by overwriting ' ' or '\t' with NUL. */
484 /* copy the original arguments and a NULL */
486 nargv[i++] = *(ac++);
491 /* compress input to output. Return bytes read, -1 on error */
493 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
496 char *outbufp, *inbufp;
497 off_t in_tot = 0, out_tot = 0;
502 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
507 outbufp = malloc(BUFLEN);
508 inbufp = malloc(BUFLEN);
509 if (outbufp == NULL || inbufp == NULL) {
510 maybe_err("malloc failed");
514 memset(&z, 0, sizeof z);
520 memcpy(outbufp, header, sizeof header);
528 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
529 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
530 *origname ? ORIG_NAME : 0,
533 (mtime >> 16) & 0xff,
534 (mtime >> 24) & 0xff,
535 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
538 /* this need PATH_MAX > BUFLEN ... */
539 maybe_err("snprintf");
544 z.next_out = outbufp + i;
545 z.avail_out = BUFLEN - i;
547 error = deflateInit2(&z, numflag, Z_DEFLATED,
548 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
550 maybe_warnx("deflateInit2 failed");
555 crc = crc32(0L, Z_NULL, 0);
557 if (z.avail_out == 0) {
558 if (write(out, outbufp, BUFLEN) != BUFLEN) {
565 z.next_out = outbufp;
566 z.avail_out = BUFLEN;
569 if (z.avail_in == 0) {
570 in_size = read(in, inbufp, BUFLEN);
579 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
582 z.avail_in = in_size;
585 error = deflate(&z, Z_NO_FLUSH);
586 if (error != Z_OK && error != Z_STREAM_END) {
587 maybe_warnx("deflate failed");
597 error = deflate(&z, Z_FINISH);
598 if (error != Z_OK && error != Z_STREAM_END) {
599 maybe_warnx("deflate failed");
604 len = (char *)z.next_out - outbufp;
606 if (write(out, outbufp, len) != len) {
612 z.next_out = outbufp;
613 z.avail_out = BUFLEN;
615 if (error == Z_STREAM_END)
619 if (deflateEnd(&z) != Z_OK) {
620 maybe_warnx("deflateEnd failed");
625 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
627 (int)(crc >> 8) & 0xff,
628 (int)(crc >> 16) & 0xff,
629 (int)(crc >> 24) & 0xff,
631 (int)(in_tot >> 8) & 0xff,
632 (int)(in_tot >> 16) & 0xff,
633 (int)(in_tot >> 24) & 0xff);
635 maybe_err("snprintf");
636 if (write(out, outbufp, i) != i) {
653 * uncompress input to output then close the input. return the
654 * uncompressed size written, and put the compressed sized read
658 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
659 const char *filename)
662 char *outbufp, *inbufp;
663 off_t out_tot = prelen, in_tot = 0;
664 uint32_t out_sub_tot = 0;
682 } state = GZSTATE_MAGIC0;
683 int flags = 0, skip_count = 0;
684 int error = 0, done_reading = 0;
688 #define ADVANCE() { z.next_in++; z.avail_in--; }
690 if ((outbufp = malloc(BUFLEN)) == NULL) {
691 maybe_err("malloc failed");
694 if ((inbufp = malloc(BUFLEN)) == NULL) {
695 maybe_err("malloc failed");
699 memset(&z, 0, sizeof z);
702 z.avail_out = BUFLEN;
703 z.next_out = outbufp;
710 if (z.avail_in == 0 && done_reading == 0) {
711 ssize_t in_size = read(in, inbufp, BUFLEN);
716 print_test(filename, 0);
718 maybe_warn("failed to read stdin");
721 } else if (in_size == 0)
724 z.avail_in = in_size;
729 if (z.avail_in == 0) {
730 if (done_reading && state != GZSTATE_MAGIC0)
731 maybe_warnx("%s: unexpected end of file",
737 if (*z.next_in != GZIP_MAGIC0) {
738 maybe_warnx("input not gziped (MAGIC0)");
745 crc = crc32(0L, Z_NULL, 0);
749 if (*z.next_in != GZIP_MAGIC1 &&
750 *z.next_in != GZIP_OMAGIC1) {
751 maybe_warnx("input not gziped (MAGIC1)");
760 if (*z.next_in != Z_DEFLATED) {
761 maybe_warnx("unknown compression method");
776 case GZSTATE_SKIPPING:
777 if (skip_count > 0) {
785 if ((flags & EXTRA_FIELD) == 0) {
786 state = GZSTATE_ORIGNAME;
789 skip_count = *z.next_in;
795 skip_count |= ((*z.next_in) << 8);
801 if (skip_count > 0) {
808 case GZSTATE_ORIGNAME:
809 if ((flags & ORIG_NAME) == 0) {
818 case GZSTATE_COMMENT:
819 if ((flags & COMMENT) == 0) {
828 case GZSTATE_HEAD_CRC1:
829 if (flags & HEAD_CRC)
836 case GZSTATE_HEAD_CRC2:
837 if (skip_count > 0) {
845 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
846 maybe_warnx("failed to inflateInit");
854 error = inflate(&z, Z_FINISH);
855 /* Z_BUF_ERROR goes with Z_FINISH... */
856 if (error != Z_STREAM_END && error != Z_BUF_ERROR)
857 /* Just need more input */
859 wr = BUFLEN - z.avail_out;
862 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
865 /* don't write anything with -t */
868 write(out, outbufp, wr) != wr) {
869 maybe_warn("error writing to output");
878 if (error == Z_STREAM_END) {
883 z.next_out = outbufp;
884 z.avail_out = BUFLEN;
889 static int empty_buffer = 0;
892 if (z.avail_in < 4) {
893 if (!done_reading && empty_buffer++ < 4)
895 maybe_warnx("truncated input");
900 origcrc = ((unsigned)z.next_in[0] & 0xff) |
901 ((unsigned)z.next_in[1] & 0xff) << 8 |
902 ((unsigned)z.next_in[2] & 0xff) << 16 |
903 ((unsigned)z.next_in[3] & 0xff) << 24;
904 if (origcrc != crc) {
905 maybe_warnx("invalid compressed"
921 static int empty_buffer = 0;
924 if (z.avail_in < 4) {
925 if (!done_reading && empty_buffer++ < 4)
927 maybe_warnx("truncated input");
932 origlen = ((unsigned)z.next_in[0] & 0xff) |
933 ((unsigned)z.next_in[1] & 0xff) << 8 |
934 ((unsigned)z.next_in[2] & 0xff) << 16 |
935 ((unsigned)z.next_in[3] & 0xff) << 24;
937 if (origlen != out_sub_tot) {
938 maybe_warnx("invalid compressed"
939 " data--length error");
949 maybe_warnx("decompression error");
953 state = GZSTATE_MAGIC0;
960 if (state > GZSTATE_INIT)
965 print_test(filename, out_tot != -1);
979 * set the owner, mode, flags & utimes for a file
982 copymodes(const char *file, struct stat *sbp)
984 struct timeval times[2];
987 * If we have no info on the input, give this file some
988 * default values and return..
991 mode_t mask = umask(022);
993 (void)chmod(file, DEFFILEMODE & ~mask);
998 /* if the chown fails, remove set-id bits as-per compress(1) */
999 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) {
1001 maybe_warn("couldn't chown: %s", file);
1002 sbp->st_mode &= ~(S_ISUID|S_ISGID);
1005 /* we only allow set-id and the 9 normal permission bits */
1006 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1007 if (chmod(file, sbp->st_mode) < 0)
1008 maybe_warn("couldn't chmod: %s", file);
1010 /* only try flags if they exist already */
1011 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0)
1012 maybe_warn("couldn't chflags: %s", file);
1014 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec);
1015 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec);
1016 if (utimes(file, times) < 0)
1017 maybe_warn("couldn't utimes: %s", file);
1021 /* what sort of file is this? */
1022 static enum filetype
1023 file_gettype(u_char *buf)
1026 if (buf[0] == GZIP_MAGIC0 &&
1027 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1030 #ifndef NO_BZIP2_SUPPORT
1031 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1032 buf[3] >= '0' && buf[3] <= '9')
1036 #ifndef NO_COMPRESS_SUPPORT
1037 if (memcmp(buf, Z_MAGIC, 2) == 0)
1045 /* check the outfile is OK. */
1047 check_outfile(const char *outfile, struct stat *sb)
1051 if (lflag == 0 && stat(outfile, sb) == 0) {
1054 else if (isatty(STDIN_FILENO)) {
1055 char ans[10] = { 'n', '\0' }; /* default */
1057 fprintf(stderr, "%s already exists -- do you wish to "
1058 "overwrite (y or n)? " , outfile);
1059 (void)fgets(ans, sizeof(ans) - 1, stdin);
1060 if (ans[0] != 'y' && ans[0] != 'Y') {
1061 fprintf(stderr, "\tnot overwritting\n");
1066 maybe_warnx("%s already exists -- skipping", outfile);
1074 unlink_input(const char *file, struct stat *sb)
1078 if (stat(file, &nsb) != 0)
1079 /* Must be gone alrady */
1081 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1082 /* Definitely a different file */
1088 static const suffixes_t *
1089 check_suffix(char *file, int xlate)
1091 const suffixes_t *s;
1092 int len = strlen(file);
1095 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1096 /* if it doesn't fit in "a.suf", don't bother */
1097 if (s->ziplen >= len)
1099 sp = file + len - s->ziplen;
1100 if (strcmp(s->zipped, sp) != 0)
1103 strcpy(sp, s->normal);
1110 * compress the given file: create a corresponding .gz file and remove the
1114 file_compress(char *file, char *outfile, size_t outsize)
1120 struct stat isb, osb;
1121 const suffixes_t *suff;
1124 in = open(file, O_RDONLY);
1126 maybe_warn("can't open %s", file);
1132 if (stat(file, &isb) == 0) {
1133 if (isb.st_nlink > 1 && fflag == 0) {
1134 maybe_warnx("%s has %d other link%s -- "
1135 "skipping", file, isb.st_nlink - 1,
1136 isb.st_nlink == 1 ? "" : "s");
1142 if (fflag == 0 && (suff = check_suffix(file, 0))
1143 && suff->zipped[0] != 0) {
1144 maybe_warnx("%s already has %s suffix -- unchanged",
1145 file, suff->zipped);
1151 /* Add (usually) .gz to filename */
1152 if ((size_t)snprintf(outfile, outsize, "%s%s",
1153 file, suffixes[0].zipped) >= outsize)
1154 memcpy(outfile - suffixes[0].ziplen - 1,
1155 suffixes[0].zipped, suffixes[0].ziplen + 1);
1158 if (check_outfile(outfile, &osb) == 0) {
1166 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1168 maybe_warn("could not create output: %s", outfile);
1173 out = STDOUT_FILENO;
1175 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1180 * If there was an error, insize will be -1.
1181 * If we compressed to stdout, just return the size.
1182 * Otherwise stat the file and check it is the correct size.
1183 * We only blow away the file if we can stat the output and it
1184 * has the expected size.
1187 return insize == -1 ? -1 : size;
1189 if (close(out) == -1)
1190 maybe_warn("couldn't close ouput");
1193 if (stat(outfile, &osb) < 0) {
1194 maybe_warn("couldn't stat: %s", outfile);
1198 if (osb.st_size != size) {
1199 maybe_warnx("output file: %s wrong size (%" PRIdOFF
1200 " != %" PRIdOFF "), deleting",
1201 outfile, osb.st_size, size);
1205 copymodes(outfile, &isb);
1208 /* output is good, ok to delete input */
1209 unlink_input(file, &isb);
1214 maybe_warnx("leaving original %s", file);
1220 /* uncompress the given file and remove the original */
1222 file_uncompress(char *file, char *outfile, size_t outsize)
1224 struct stat isb, osb;
1227 unsigned char header1[4];
1228 enum filetype method;
1231 time_t timestamp = 0;
1232 unsigned char name[PATH_MAX + 1];
1235 /* gather the old name info */
1237 fd = open(file, O_RDONLY);
1239 maybe_warn("can't open %s", file);
1243 strlcpy(outfile, file, outsize);
1244 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1245 maybe_warnx("%s: unknown suffix -- ignored", file);
1249 rbytes = read(fd, header1, sizeof header1);
1250 if (rbytes != sizeof header1) {
1251 /* we don't want to fail here. */
1257 maybe_warn("can't read %s", file);
1259 maybe_warnx("%s: unexpected end of file", file);
1263 method = file_gettype(header1);
1266 if (fflag == 0 && method == FT_UNKNOWN) {
1267 maybe_warnx("%s: not in gzip format", file);
1274 if (method == FT_GZIP && Nflag) {
1275 unsigned char ts[4]; /* timestamp */
1277 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) {
1279 maybe_warn("can't read %s", file);
1282 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1284 if (header1[3] & ORIG_NAME) {
1285 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
1287 maybe_warn("can't read %s", file);
1291 /* preserve original directory name */
1292 char *dp = strrchr(file, '/');
1297 snprintf(outfile, outsize, "%.*s%.*s",
1299 file, (int) rbytes, name);
1304 lseek(fd, 0, SEEK_SET);
1306 if (cflag == 0 || lflag) {
1307 if (fstat(fd, &isb) != 0)
1310 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1311 maybe_warnx("%s has %d other links -- skipping",
1312 file, isb.st_nlink - 1);
1315 if (nflag == 0 && timestamp)
1316 isb.st_mtime = timestamp;
1317 if (check_outfile(outfile, &osb) == 0)
1322 if (cflag == 0 && lflag == 0) {
1323 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1324 if (zfd == STDOUT_FILENO) {
1325 /* We won't close STDOUT_FILENO later... */
1327 close(STDOUT_FILENO);
1330 maybe_warn("can't open %s", outfile);
1334 zfd = STDOUT_FILENO;
1336 #ifndef NO_BZIP2_SUPPORT
1337 if (method == FT_BZIP2) {
1341 maybe_warnx("no -l with bzip2 files");
1345 size = unbzip2(fd, zfd, NULL, 0, NULL);
1349 #ifndef NO_COMPRESS_SUPPORT
1350 if (method == FT_Z) {
1355 maybe_warnx("no -l with Lempel-Ziv files");
1359 if ((in = zdopen(fd)) == NULL) {
1360 maybe_warn("zdopen for read: %s", file);
1364 out = fdopen(dup(zfd), "w");
1366 maybe_warn("fdopen for write: %s", outfile);
1371 size = zuncompress(in, out, NULL, 0, NULL);
1372 /* need to fclose() if ferror() is true... */
1373 if (ferror(in) | fclose(in)) {
1374 maybe_warn("failed infile fclose");
1378 if (fclose(out) != 0) {
1379 maybe_warn("failed outfile fclose");
1387 if (method == FT_UNKNOWN) {
1389 maybe_warnx("no -l for unknown filetypes");
1392 size = cat_fd(NULL, 0, NULL, fd);
1397 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1399 return -1; /* XXX */
1402 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1406 maybe_warn("couldn't close input");
1407 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1408 maybe_warn("couldn't close output");
1413 maybe_warnx("%s: uncompress failed", file);
1417 /* if testing, or we uncompressed to stdout, this is all we need */
1422 /* if we are uncompressing to stdin, don't remove the file. */
1427 * if we create a file...
1430 * if we can't stat the file don't remove the file.
1432 if (stat(outfile, &osb) < 0) {
1433 maybe_warn("couldn't stat (leaving original): %s",
1437 if (osb.st_size != size) {
1438 maybe_warn("stat gave different size: %" PRIdOFF
1439 " != %" PRIdOFF " (leaving original)",
1444 unlink_input(file, &isb);
1446 copymodes(outfile, &isb);
1453 if (zfd != -1 && zfd != STDOUT_FILENO)
1460 cat_fd(unsigned char * prepend, ssize_t count, off_t *gsizep, int fd)
1467 if (write(STDOUT_FILENO, prepend, count) != count) {
1468 maybe_warn("write to stdout");
1472 rv = read(fd, buf, sizeof buf);
1476 maybe_warn("read from fd %d", fd);
1480 if (write(STDOUT_FILENO, buf, rv) != rv) {
1481 maybe_warn("write to stdout");
1496 unsigned char header1[4];
1498 enum filetype method;
1499 #ifndef NO_COMPRESS_SUPPORT
1504 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1505 maybe_warnx("standard input is a terminal -- ignoring");
1513 /* XXX could read the whole file, etc. */
1514 if (fstat(STDIN_FILENO, &isb) < 0) {
1515 maybe_warn("fstat");
1518 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1522 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) {
1523 maybe_warn("can't read stdin");
1527 method = file_gettype(header1);
1532 maybe_warnx("unknown compression format");
1535 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1539 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1540 header1, sizeof header1, &gsize, "(stdin)");
1542 #ifndef NO_BZIP2_SUPPORT
1544 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1545 header1, sizeof header1, &gsize);
1548 #ifndef NO_COMPRESS_SUPPORT
1550 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1551 maybe_warnx("zopen of stdin");
1555 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
1562 if (vflag && !tflag && usize != -1 && gsize != -1)
1563 print_verbage(NULL, NULL, usize, gsize);
1574 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1575 maybe_warnx("standard output is a terminal -- ignoring");
1579 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0);
1582 if (vflag && !tflag && usize != -1 && gsize != -1)
1583 print_verbage(NULL, NULL, usize, gsize);
1587 /* do what is asked for, for the path name */
1589 handle_pathname(char *path)
1591 char *opath = path, *s = NULL;
1596 /* check for stdout/stdin */
1597 if (path[0] == '-' && path[1] == '\0') {
1606 if (stat(path, &sb) < 0) {
1607 /* lets try <path>.gz if we're decompressing */
1608 if (dflag && s == NULL && errno == ENOENT) {
1610 slen = suffixes[0].ziplen;
1611 s = malloc(len + slen + 1);
1613 maybe_err("malloc");
1614 memcpy(s, path, len);
1615 memcpy(s + len, suffixes[0].zipped, slen + 1);
1619 maybe_warn("can't stat: %s", opath);
1623 if (S_ISDIR(sb.st_mode)) {
1629 maybe_warnx("%s is a directory", path);
1633 if (S_ISREG(sb.st_mode))
1634 handle_file(path, &sb);
1636 maybe_warnx("%s is not a regular file", path);
1643 /* compress/decompress a file */
1645 handle_file(char *file, struct stat *sbp)
1648 char outfile[PATH_MAX];
1652 usize = file_uncompress(file, outfile, sizeof(outfile));
1655 gsize = sbp->st_size;
1657 gsize = file_compress(file, outfile, sizeof(outfile));
1660 usize = sbp->st_size;
1665 if (vflag && !tflag)
1666 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1671 /* this is used with -r to recursively descend directories */
1673 handle_dir(char *dir)
1681 fts = fts_open(path_argv, FTS_PHYSICAL, NULL);
1683 warn("couldn't fts_open %s", dir);
1687 while ((entry = fts_read(fts))) {
1688 switch(entry->fts_info) {
1696 maybe_warn("%s", entry->fts_path);
1699 handle_file(entry->fts_name, entry->fts_statp);
1702 (void)fts_close(fts);
1706 /* print a ratio - size reduction as a fraction of uncompressed size */
1708 print_ratio(off_t in, off_t out, FILE *where)
1710 int percent10; /* 10 * percent */
1718 * Output is more than double size of input! print -99.9%
1719 * Quite possibly we've failed to get the original size.
1724 * We only need 12 bits of result from the final division,
1725 * so reduce the values until a 32bit division will suffice.
1727 while (in > 0x100000) {
1732 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1737 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1738 /* Move the '.' to before the last digit */
1739 buff[len - 1] = buff[len - 2];
1740 buff[len - 2] = '.';
1741 fprintf(where, "%5s%%", buff);
1745 /* print compression statistics, and the new name (if there is one!) */
1747 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1750 fprintf(stderr, "%s:%s ", file,
1751 strlen(file) < 7 ? "\t\t" : "\t");
1752 print_ratio(usize, gsize, stderr);
1754 fprintf(stderr, " -- replaced with %s", nfile);
1755 fprintf(stderr, "\n");
1759 /* print test results */
1761 print_test(const char *file, int ok)
1764 if (exit_value == 0 && ok == 0)
1766 fprintf(stderr, "%s:%s %s\n", file,
1767 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
1772 /* print a file's info ala --list */
1774 compressed uncompressed ratio uncompressed_name
1775 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
1778 print_list(int fd, off_t out, const char *outfile, time_t ts)
1780 static int first = 1;
1782 static off_t in_tot, out_tot;
1791 printf("method crc date time ");
1794 printf(" compressed uncompressed "
1795 "ratio uncompressed_name\n");
1807 /* read the last 4 bytes - this is the uncompressed size */
1808 rv = lseek(fd, (off_t)(-8), SEEK_END);
1810 unsigned char buf[8];
1813 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf))
1814 maybe_warn("read of uncompressed size");
1815 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24;
1818 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24;
1824 if (vflag && fd == -1)
1827 char *date = ctime(&ts);
1829 /* skip the day, 1/100th second, and year */
1832 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
1837 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
1838 print_ratio(in, out, stdout);
1839 printf(" %s\n", outfile);
1842 /* display the usage of NetBSD gzip */
1847 fprintf(stderr, "%s\n", gzip_version);
1849 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n"
1851 " -c --stdout write to stdout, keep original files\n"
1853 " -d --decompress uncompress files\n"
1855 " -f --force force overwriting & compress links\n"
1856 " -h --help display this help\n"
1857 " -n --no-name don't save original file name or time stamp\n"
1858 " -N --name save or restore original file name and time stamp\n"
1859 " -q --quiet output no warnings\n"
1860 " -r --recursive recursively compress files in directories\n"
1861 " -S .suf use suffix .suf instead of .gz\n"
1863 " -t --test test compressed file\n"
1864 " -v --verbose print extra statistics\n"
1865 " -V --version display program version\n"
1866 " -1 --fast fastest (worst) compression\n"
1867 " -2 .. -8 set compression level\n"
1868 " -9 --best best (slowest) compression\n",
1876 /* display the version of NetBSD gzip */
1878 display_version(void)
1881 fprintf(stderr, "%s\n", gzip_version);
1885 #ifndef NO_BZIP2_SUPPORT
1886 #include "unbzip2.c"
1888 #ifndef NO_COMPRESS_SUPPORT
1889 #include "zuncompress.c"