1 /* $NetBSD: gzip.c,v 1.94 2009/04/12 10:31:14 lukem 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, 2006 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.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * gzip.c -- GPL free gzip using zlib.
33 * RFC 1950 covers the zlib format
34 * RFC 1951 covers the deflate format
35 * RFC 1952 covers the gzip format
38 * - use mmap where possible
39 * - handle some signals better (remove outfile?)
40 * - make bzip2/compress -v/-t/-l support work as well as possible
43 #include <sys/param.h>
63 #define PRIdOFF PRId64
70 /* what type of file are we dealing with */
73 #ifndef NO_BZIP2_SUPPORT
76 #ifndef NO_COMPRESS_SUPPORT
79 #ifndef NO_PACK_SUPPORT
86 #ifndef NO_BZIP2_SUPPORT
89 #define BZ2_SUFFIX ".bz2"
90 #define BZIP2_MAGIC "\102\132\150"
93 #ifndef NO_COMPRESS_SUPPORT
95 #define Z_MAGIC "\037\235"
98 #ifndef NO_PACK_SUPPORT
99 #define PACK_MAGIC "\037\036"
102 #define GZ_SUFFIX ".gz"
104 #define BUFLEN (64 * 1024)
106 #define GZIP_MAGIC0 0x1F
107 #define GZIP_MAGIC1 0x8B
108 #define GZIP_OMAGIC1 0x9E
110 #define GZIP_TIMESTAMP (off_t)4
111 #define GZIP_ORIGNAME (off_t)10
113 #define HEAD_CRC 0x02
114 #define EXTRA_FIELD 0x04
115 #define ORIG_NAME 0x08
118 #define OS_CODE 3 /* Unix */
123 const char *normal; /* for unzip - must not be longer than zipped */
125 static suffixes_t suffixes[] = {
126 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
127 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
129 SUFFIX(GZ_SUFFIX, ""),
134 SUFFIX(".taz", ".tar"),
135 SUFFIX(".tgz", ".tar"),
136 #ifndef NO_BZIP2_SUPPORT
137 SUFFIX(BZ2_SUFFIX, ""),
139 #ifndef NO_COMPRESS_SUPPORT
140 SUFFIX(Z_SUFFIX, ""),
142 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
146 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
148 #define SUFFIX_MAXLEN 30
150 static const char gzip_version[] = "NetBSD gzip 20060927";
152 static int cflag; /* stdout mode */
153 static int dflag; /* decompress mode */
154 static int lflag; /* list mode */
155 static int numflag = 6; /* gzip -1..-9 value */
158 static int fflag; /* force mode */
159 static int kflag; /* don't delete input files */
160 static int nflag; /* don't save name/timestamp */
161 static int Nflag; /* don't restore name/timestamp */
162 static int qflag; /* quiet mode */
163 static int rflag; /* recursive mode */
164 static int tflag; /* test */
165 static int vflag; /* verbose mode */
171 static int exit_value = 0; /* exit value */
173 static char *infile; /* name of file coming in */
175 static void maybe_err(const char *fmt, ...)
176 __attribute__((__format__(__printf__, 1, 2)));
177 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT)
178 static void maybe_errx(const char *fmt, ...)
179 __attribute__((__format__(__printf__, 1, 2)));
181 static void maybe_warn(const char *fmt, ...)
182 __attribute__((__format__(__printf__, 1, 2)));
183 static void maybe_warnx(const char *fmt, ...)
184 __attribute__((__format__(__printf__, 1, 2)));
185 static enum filetype file_gettype(u_char *);
187 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
189 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
190 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
191 static off_t file_compress(char *, char *, size_t);
192 static off_t file_uncompress(char *, char *, size_t);
193 static void handle_pathname(char *);
194 static void handle_file(char *, struct stat *);
195 static void handle_stdin(void);
196 static void handle_stdout(void);
197 static void print_ratio(off_t, off_t, FILE *);
198 static void print_list(int fd, off_t, const char *, time_t);
199 static void usage(void);
200 static void display_version(void);
201 static const suffixes_t *check_suffix(char *, int);
202 static ssize_t read_retry(int, void *, size_t);
205 #define unlink_input(f, sb) unlink(f)
207 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd);
208 static void prepend_gzip(char *, int *, char ***);
209 static void handle_dir(char *);
210 static void print_verbage(const char *, const char *, off_t, off_t);
211 static void print_test(const char *, int);
212 static void copymodes(int fd, const struct stat *, const char *file);
213 static int check_outfile(const char *outfile);
216 #ifndef NO_BZIP2_SUPPORT
217 static off_t unbzip2(int, int, char *, size_t, off_t *);
220 #ifndef NO_COMPRESS_SUPPORT
221 static FILE *zdopen(int);
222 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
225 #ifndef NO_PACK_SUPPORT
226 static off_t unpack(int, int, char *, size_t, off_t *);
229 int main(int, char *p[]);
232 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
234 static const struct option longopts[] = {
235 { "stdout", no_argument, 0, 'c' },
236 { "to-stdout", no_argument, 0, 'c' },
237 { "decompress", no_argument, 0, 'd' },
238 { "uncompress", no_argument, 0, 'd' },
239 { "force", no_argument, 0, 'f' },
240 { "help", no_argument, 0, 'h' },
241 { "keep", no_argument, 0, 'k' },
242 { "list", no_argument, 0, 'l' },
243 { "no-name", no_argument, 0, 'n' },
244 { "name", no_argument, 0, 'N' },
245 { "quiet", no_argument, 0, 'q' },
246 { "recursive", no_argument, 0, 'r' },
247 { "suffix", required_argument, 0, 'S' },
248 { "test", no_argument, 0, 't' },
249 { "verbose", no_argument, 0, 'v' },
250 { "version", no_argument, 0, 'V' },
251 { "fast", no_argument, 0, '1' },
252 { "best", no_argument, 0, '9' },
255 * This is what else GNU gzip implements. --ascii isn't useful
256 * on NetBSD, and I don't care to have a --license.
258 { "ascii", no_argument, 0, 'a' },
259 { "license", no_argument, 0, 'L' },
261 { NULL, no_argument, 0, 0 },
266 main(int argc, char **argv)
268 const char *progname = getprogname();
275 /* XXX set up signals */
278 if ((gzip = getenv("GZIP")) != NULL)
279 prepend_gzip(gzip, &argc, &argv);
284 * handle being called `gunzip', `zcat' and `gzcat'
286 if (strcmp(progname, "gunzip") == 0)
288 else if (strcmp(progname, "zcat") == 0 ||
289 strcmp(progname, "gzcat") == 0)
293 #define OPT_LIST "123456789cdhltV"
295 #define OPT_LIST "123456789cdfhklNnqrS:tVv"
298 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':
340 len = strlen(optarg);
342 if (len >= SUFFIX_MAXLEN)
343 errx(1, "incorrect suffix: '%s'", optarg);
344 suffixes[0].zipped = optarg;
345 suffixes[0].ziplen = len;
347 suffixes[NUM_SUFFIXES - 1].zipped = "";
348 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
369 if (dflag) /* stdin mode */
371 else /* stdout mode */
375 handle_pathname(argv[0]);
379 if (qflag == 0 && lflag && argc > 1)
380 print_list(-1, 0, "(totals)", 0);
385 /* maybe print a warning */
387 maybe_warn(const char *fmt, ...)
400 /* ... without an errno. */
402 maybe_warnx(const char *fmt, ...)
415 /* maybe print an error */
417 maybe_err(const char *fmt, ...)
429 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT)
430 /* ... without an errno. */
432 maybe_errx(const char *fmt, ...)
446 /* split up $GZIP and prepend it to the argument list */
448 prepend_gzip(char *gzip, int *argc, char ***argv)
450 char *s, **nargv, **ac;
453 /* scan how many arguments there are */
455 while (*s == ' ' || *s == '\t')
460 while (*s != ' ' && *s != '\t')
472 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
476 /* stash this away */
479 /* copy the program name first */
481 nargv[i++] = *(ac++);
483 /* take a copy of $GZIP and add it to the array */
488 /* Skip whitespaces. */
489 while (*s == ' ' || *s == '\t')
494 /* Find the end of this argument. */
495 while (*s != ' ' && *s != '\t')
497 /* Argument followed by NUL. */
499 /* Terminate by overwriting ' ' or '\t' with NUL. */
504 /* copy the original arguments and a NULL */
506 nargv[i++] = *(ac++);
511 /* compress input to output. Return bytes read, -1 on error */
513 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
516 char *outbufp, *inbufp;
517 off_t in_tot = 0, out_tot = 0;
522 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
527 outbufp = malloc(BUFLEN);
528 inbufp = malloc(BUFLEN);
529 if (outbufp == NULL || inbufp == NULL) {
530 maybe_err("malloc failed");
534 memset(&z, 0, sizeof z);
540 memcpy(outbufp, header, sizeof header);
548 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
549 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
550 *origname ? ORIG_NAME : 0,
553 (mtime >> 16) & 0xff,
554 (mtime >> 24) & 0xff,
555 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
558 /* this need PATH_MAX > BUFLEN ... */
559 maybe_err("snprintf");
564 z.next_out = outbufp + i;
565 z.avail_out = BUFLEN - i;
567 error = deflateInit2(&z, numflag, Z_DEFLATED,
568 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
570 maybe_warnx("deflateInit2 failed");
575 crc = crc32(0L, Z_NULL, 0);
577 if (z.avail_out == 0) {
578 if (write(out, outbufp, BUFLEN) != BUFLEN) {
585 z.next_out = outbufp;
586 z.avail_out = BUFLEN;
589 if (z.avail_in == 0) {
590 in_size = read(in, inbufp, BUFLEN);
599 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
602 z.avail_in = in_size;
605 error = deflate(&z, Z_NO_FLUSH);
606 if (error != Z_OK && error != Z_STREAM_END) {
607 maybe_warnx("deflate failed");
618 error = deflate(&z, Z_FINISH);
619 if (error != Z_OK && error != Z_STREAM_END) {
620 maybe_warnx("deflate failed");
625 len = (char *)z.next_out - outbufp;
627 w = write(out, outbufp, len);
628 if (w == -1 || (size_t)w != len) {
634 z.next_out = outbufp;
635 z.avail_out = BUFLEN;
637 if (error == Z_STREAM_END)
641 if (deflateEnd(&z) != Z_OK) {
642 maybe_warnx("deflateEnd failed");
647 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
649 (int)(crc >> 8) & 0xff,
650 (int)(crc >> 16) & 0xff,
651 (int)(crc >> 24) & 0xff,
653 (int)(in_tot >> 8) & 0xff,
654 (int)(in_tot >> 16) & 0xff,
655 (int)(in_tot >> 24) & 0xff);
657 maybe_err("snprintf");
659 if (in_tot > 0xffffffff)
660 maybe_warn("input file size >= 4GB cannot be saved");
662 if (write(out, outbufp, i) != i) {
679 * uncompress input to output then close the input. return the
680 * uncompressed size written, and put the compressed sized read
684 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
685 const char *filename)
688 char *outbufp, *inbufp;
689 off_t out_tot = -1, in_tot = 0;
690 uint32_t out_sub_tot = 0;
708 } state = GZSTATE_MAGIC0;
709 int flags = 0, skip_count = 0;
710 int error = Z_STREAM_ERROR, done_reading = 0;
715 #define ADVANCE() { z.next_in++; z.avail_in--; }
717 if ((outbufp = malloc(BUFLEN)) == NULL) {
718 maybe_err("malloc failed");
721 if ((inbufp = malloc(BUFLEN)) == NULL) {
722 maybe_err("malloc failed");
726 memset(&z, 0, sizeof z);
729 z.avail_out = BUFLEN;
730 z.next_out = outbufp;
739 if ((z.avail_in == 0 || needmore) && done_reading == 0) {
742 if (z.avail_in > 0) {
743 memmove(inbufp, z.next_in, z.avail_in);
746 in_size = read(in, z.next_in + z.avail_in,
747 BUFLEN - z.avail_in);
750 maybe_warn("failed to read stdin");
752 } else if (in_size == 0) {
756 z.avail_in += in_size;
761 if (z.avail_in == 0) {
762 if (done_reading && state != GZSTATE_MAGIC0) {
763 maybe_warnx("%s: unexpected end of file",
771 if (*z.next_in != GZIP_MAGIC0) {
773 maybe_warnx("%s: trailing garbage "
774 "ignored", filename);
777 maybe_warnx("input not gziped (MAGIC0)");
783 crc = crc32(0L, Z_NULL, 0);
787 if (*z.next_in != GZIP_MAGIC1 &&
788 *z.next_in != GZIP_OMAGIC1) {
789 maybe_warnx("input not gziped (MAGIC1)");
797 if (*z.next_in != Z_DEFLATED) {
798 maybe_warnx("unknown compression method");
812 case GZSTATE_SKIPPING:
813 if (skip_count > 0) {
821 if ((flags & EXTRA_FIELD) == 0) {
822 state = GZSTATE_ORIGNAME;
825 skip_count = *z.next_in;
831 skip_count |= ((*z.next_in) << 8);
837 if (skip_count > 0) {
844 case GZSTATE_ORIGNAME:
845 if ((flags & ORIG_NAME) == 0) {
854 case GZSTATE_COMMENT:
855 if ((flags & COMMENT) == 0) {
864 case GZSTATE_HEAD_CRC1:
865 if (flags & HEAD_CRC)
872 case GZSTATE_HEAD_CRC2:
873 if (skip_count > 0) {
881 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
882 maybe_warnx("failed to inflateInit");
889 error = inflate(&z, Z_FINISH);
891 /* Z_BUF_ERROR goes with Z_FINISH... */
893 if (z.avail_out > 0 && !done_reading)
900 maybe_warnx("Z_NEED_DICT error");
903 maybe_warnx("data stream error");
906 maybe_warnx("internal stream error");
909 maybe_warnx("memory allocation error");
913 maybe_warn("unknown error from inflate(): %d",
916 wr = BUFLEN - z.avail_out;
919 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
922 /* don't write anything with -t */
925 write(out, outbufp, wr) != wr) {
926 maybe_warn("error writing to output");
934 if (error == Z_STREAM_END) {
939 z.next_out = outbufp;
940 z.avail_out = BUFLEN;
947 if (z.avail_in < 4) {
952 maybe_warnx("truncated input");
955 origcrc = ((unsigned)z.next_in[0] & 0xff) |
956 ((unsigned)z.next_in[1] & 0xff) << 8 |
957 ((unsigned)z.next_in[2] & 0xff) << 16 |
958 ((unsigned)z.next_in[3] & 0xff) << 24;
959 if (origcrc != crc) {
960 maybe_warnx("invalid compressed"
969 if (!z.avail_in && done_reading) {
978 if (z.avail_in < 4) {
983 maybe_warnx("truncated input");
986 origlen = ((unsigned)z.next_in[0] & 0xff) |
987 ((unsigned)z.next_in[1] & 0xff) << 8 |
988 ((unsigned)z.next_in[2] & 0xff) << 16 |
989 ((unsigned)z.next_in[3] & 0xff) << 24;
991 if (origlen != out_sub_tot) {
992 maybe_warnx("invalid compressed"
993 " data--length error");
1002 maybe_warnx("decompression error");
1005 state = GZSTATE_MAGIC0;
1014 if (state > GZSTATE_INIT)
1028 * set the owner, mode, flags & utimes using the given file descriptor.
1029 * file is only used in possible warning messages.
1032 copymodes(int fd, const struct stat *sbp, const char *file)
1034 struct timeval times[2];
1038 * If we have no info on the input, give this file some
1039 * default values and return..
1042 mode_t mask = umask(022);
1044 (void)fchmod(fd, DEFFILEMODE & ~mask);
1050 /* if the chown fails, remove set-id bits as-per compress(1) */
1051 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) {
1053 maybe_warn("couldn't fchown: %s", file);
1054 sb.st_mode &= ~(S_ISUID|S_ISGID);
1057 /* we only allow set-id and the 9 normal permission bits */
1058 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1059 if (fchmod(fd, sb.st_mode) < 0)
1060 maybe_warn("couldn't fchmod: %s", file);
1062 /* only try flags if they exist already */
1063 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0)
1064 maybe_warn("couldn't fchflags: %s", file);
1066 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec);
1067 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec);
1068 if (futimes(fd, times) < 0)
1069 maybe_warn("couldn't utimes: %s", file);
1073 /* what sort of file is this? */
1074 static enum filetype
1075 file_gettype(u_char *buf)
1078 if (buf[0] == GZIP_MAGIC0 &&
1079 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1082 #ifndef NO_BZIP2_SUPPORT
1083 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1084 buf[3] >= '0' && buf[3] <= '9')
1088 #ifndef NO_COMPRESS_SUPPORT
1089 if (memcmp(buf, Z_MAGIC, 2) == 0)
1093 #ifndef NO_PACK_SUPPORT
1094 if (memcmp(buf, PACK_MAGIC, 2) == 0)
1102 /* check the outfile is OK. */
1104 check_outfile(const char *outfile)
1109 if (lflag == 0 && stat(outfile, &sb) == 0) {
1112 else if (isatty(STDIN_FILENO)) {
1113 char ans[10] = { 'n', '\0' }; /* default */
1115 fprintf(stderr, "%s already exists -- do you wish to "
1116 "overwrite (y or n)? " , outfile);
1117 (void)fgets(ans, sizeof(ans) - 1, stdin);
1118 if (ans[0] != 'y' && ans[0] != 'Y') {
1119 fprintf(stderr, "\tnot overwriting\n");
1124 maybe_warnx("%s already exists -- skipping", outfile);
1132 unlink_input(const char *file, const struct stat *sb)
1138 if (stat(file, &nsb) != 0)
1139 /* Must be gone alrady */
1141 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1142 /* Definitely a different file */
1148 static const suffixes_t *
1149 check_suffix(char *file, int xlate)
1151 const suffixes_t *s;
1152 int len = strlen(file);
1155 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1156 /* if it doesn't fit in "a.suf", don't bother */
1157 if (s->ziplen >= len)
1159 sp = file + len - s->ziplen;
1160 if (strcmp(s->zipped, sp) != 0)
1163 strcpy(sp, s->normal);
1170 * compress the given file: create a corresponding .gz file and remove the
1174 file_compress(char *file, char *outfile, size_t outsize)
1180 struct stat isb, osb;
1181 const suffixes_t *suff;
1184 in = open(file, O_RDONLY);
1186 maybe_warn("can't open %s", file);
1192 if (fstat(in, &isb) == 0) {
1193 if (isb.st_nlink > 1 && fflag == 0) {
1194 maybe_warnx("%s has %d other link%s -- "
1195 "skipping", file, isb.st_nlink - 1,
1196 isb.st_nlink == 1 ? "" : "s");
1202 if (fflag == 0 && (suff = check_suffix(file, 0))
1203 && suff->zipped[0] != 0) {
1204 maybe_warnx("%s already has %s suffix -- unchanged",
1205 file, suff->zipped);
1211 /* Add (usually) .gz to filename */
1212 if ((size_t)snprintf(outfile, outsize, "%s%s",
1213 file, suffixes[0].zipped) >= outsize) {
1214 errx(1, "file path too long: %s", file);
1217 if (check_outfile(outfile) == 0) {
1225 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1227 maybe_warn("could not create output: %s", outfile);
1232 out = STDOUT_FILENO;
1234 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1239 * If there was an error, insize will be -1.
1240 * If we compressed to stdout, just return the size.
1241 * Otherwise stat the file and check it is the correct size.
1242 * We only blow away the file if we can stat the output and it
1243 * has the expected size.
1246 return insize == -1 ? -1 : size;
1249 if (fstat(out, &osb) != 0) {
1250 maybe_warn("couldn't stat: %s", outfile);
1254 if (osb.st_size != size) {
1255 maybe_warnx("output file: %s wrong size (%" PRIdOFF
1256 " != %" PRIdOFF "), deleting",
1257 outfile, osb.st_size, size);
1261 copymodes(out, &isb, outfile);
1263 if (close(out) == -1)
1264 maybe_warn("couldn't close output");
1266 /* output is good, ok to delete input */
1267 unlink_input(file, &isb);
1272 if (close(out) == -1)
1273 maybe_warn("couldn't close output");
1275 maybe_warnx("leaving original %s", file);
1281 /* uncompress the given file and remove the original */
1283 file_uncompress(char *file, char *outfile, size_t outsize)
1285 struct stat isb, osb;
1288 unsigned char header1[4];
1289 enum filetype method;
1290 int fd, ofd, zfd = -1;
1293 time_t timestamp = 0;
1294 unsigned char name[PATH_MAX + 1];
1297 /* gather the old name info */
1299 fd = open(file, O_RDONLY);
1301 maybe_warn("can't open %s", file);
1305 if ((size_t)snprintf(outfile, outsize, "%s", file) >= outsize)
1306 errx(1, "file path too long: %s", file);
1307 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1308 maybe_warnx("%s: unknown suffix -- ignored", file);
1312 rbytes = read(fd, header1, sizeof header1);
1313 if (rbytes != sizeof header1) {
1314 /* we don't want to fail here. */
1320 maybe_warn("can't read %s", file);
1322 goto unexpected_EOF;
1326 method = file_gettype(header1);
1329 if (fflag == 0 && method == FT_UNKNOWN) {
1330 maybe_warnx("%s: not in gzip format", file);
1337 if (method == FT_GZIP && Nflag) {
1338 unsigned char ts[4]; /* timestamp */
1340 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
1341 if (rv >= 0 && rv < (ssize_t)(sizeof ts))
1342 goto unexpected_EOF;
1345 maybe_warn("can't read %s", file);
1348 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1350 if (header1[3] & ORIG_NAME) {
1351 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
1353 maybe_warn("can't read %s", file);
1357 /* preserve original directory name */
1358 char *dp = strrchr(file, '/');
1363 snprintf(outfile, outsize, "%.*s%.*s",
1365 file, (int) rbytes, name);
1370 lseek(fd, 0, SEEK_SET);
1372 if (cflag == 0 || lflag) {
1373 if (fstat(fd, &isb) != 0)
1376 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1377 maybe_warnx("%s has %d other links -- skipping",
1378 file, isb.st_nlink - 1);
1381 if (nflag == 0 && timestamp)
1382 isb.st_mtime = timestamp;
1383 if (check_outfile(outfile) == 0)
1388 if (cflag == 0 && lflag == 0) {
1389 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1390 if (zfd == STDOUT_FILENO) {
1391 /* We won't close STDOUT_FILENO later... */
1393 close(STDOUT_FILENO);
1396 maybe_warn("can't open %s", outfile);
1400 zfd = STDOUT_FILENO;
1402 #ifndef NO_BZIP2_SUPPORT
1403 if (method == FT_BZIP2) {
1407 maybe_warnx("no -l with bzip2 files");
1411 size = unbzip2(fd, zfd, NULL, 0, NULL);
1415 #ifndef NO_COMPRESS_SUPPORT
1416 if (method == FT_Z) {
1421 maybe_warnx("no -l with Lempel-Ziv files");
1425 if ((in = zdopen(fd)) == NULL) {
1426 maybe_warn("zdopen for read: %s", file);
1430 out = fdopen(dup(zfd), "w");
1432 maybe_warn("fdopen for write: %s", outfile);
1437 size = zuncompress(in, out, NULL, 0, NULL);
1438 /* need to fclose() if ferror() is true... */
1439 if (ferror(in) | fclose(in)) {
1440 maybe_warn("failed infile fclose");
1444 if (fclose(out) != 0) {
1445 maybe_warn("failed outfile fclose");
1452 #ifndef NO_PACK_SUPPORT
1453 if (method == FT_PACK) {
1455 maybe_warnx("no -l with packed files");
1459 size = unpack(fd, zfd, NULL, 0, NULL);
1464 if (method == FT_UNKNOWN) {
1466 maybe_warnx("no -l for unknown filetypes");
1469 size = cat_fd(NULL, 0, NULL, fd);
1474 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1476 return -1; /* XXX */
1479 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1483 maybe_warn("couldn't close input");
1484 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1485 maybe_warn("couldn't close output");
1490 maybe_warnx("%s: uncompress failed", file);
1494 /* if testing, or we uncompressed to stdout, this is all we need */
1499 /* if we are uncompressing to stdin, don't remove the file. */
1504 * if we create a file...
1507 * if we can't stat the file don't remove the file.
1510 ofd = open(outfile, O_RDWR, 0);
1512 maybe_warn("couldn't open (leaving original): %s",
1516 if (fstat(ofd, &osb) != 0) {
1517 maybe_warn("couldn't stat (leaving original): %s",
1522 if (osb.st_size != size) {
1523 maybe_warnx("stat gave different size: %" PRIdOFF
1524 " != %" PRIdOFF " (leaving original)",
1530 unlink_input(file, &isb);
1532 copymodes(ofd, &isb, outfile);
1538 maybe_warnx("%s: unexpected end of file", file);
1542 if (zfd != -1 && zfd != STDOUT_FILENO)
1549 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd)
1556 w = write(STDOUT_FILENO, prepend, count);
1557 if (w == -1 || (size_t)w != count) {
1558 maybe_warn("write to stdout");
1564 rv = read(fd, buf, sizeof buf);
1568 maybe_warn("read from fd %d", fd);
1572 if (write(STDOUT_FILENO, buf, rv) != rv) {
1573 maybe_warn("write to stdout");
1588 unsigned char header1[4];
1590 enum filetype method;
1592 #ifndef NO_COMPRESS_SUPPORT
1597 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1598 maybe_warnx("standard input is a terminal -- ignoring");
1606 /* XXX could read the whole file, etc. */
1607 if (fstat(STDIN_FILENO, &isb) < 0) {
1608 maybe_warn("fstat");
1611 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1615 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
1616 if (bytes_read == -1) {
1617 maybe_warn("can't read stdin");
1619 } else if (bytes_read != sizeof(header1)) {
1620 maybe_warnx("(stdin): unexpected end of file");
1624 method = file_gettype(header1);
1629 maybe_warnx("unknown compression format");
1632 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1636 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1637 header1, sizeof header1, &gsize, "(stdin)");
1639 #ifndef NO_BZIP2_SUPPORT
1641 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1642 header1, sizeof header1, &gsize);
1645 #ifndef NO_COMPRESS_SUPPORT
1647 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1648 maybe_warnx("zopen of stdin");
1652 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
1656 #ifndef NO_PACK_SUPPORT
1658 usize = unpack(STDIN_FILENO, STDOUT_FILENO,
1659 (char *)header1, sizeof header1, &gsize);
1665 if (vflag && !tflag && usize != -1 && gsize != -1)
1666 print_verbage(NULL, NULL, usize, gsize);
1668 print_test("(stdin)", usize != -1);
1683 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1684 maybe_warnx("standard output is a terminal -- ignoring");
1688 /* If stdin is a file use it's mtime, otherwise use current time */
1689 ret = fstat(STDIN_FILENO, &sb);
1693 maybe_warn("Can't stat stdin");
1698 if (S_ISREG(sb.st_mode))
1699 mtime = (uint32_t)sb.st_mtime;
1701 systime = time(NULL);
1703 if (systime == -1) {
1708 mtime = (uint32_t)systime;
1711 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
1713 if (vflag && !tflag && usize != -1 && gsize != -1)
1714 print_verbage(NULL, NULL, usize, gsize);
1718 /* do what is asked for, for the path name */
1720 handle_pathname(char *path)
1722 char *opath = path, *s = NULL;
1727 /* check for stdout/stdin */
1728 if (path[0] == '-' && path[1] == '\0') {
1737 if (stat(path, &sb) != 0) {
1738 /* lets try <path>.gz if we're decompressing */
1739 if (dflag && s == NULL && errno == ENOENT) {
1741 slen = suffixes[0].ziplen;
1742 s = malloc(len + slen + 1);
1744 maybe_err("malloc");
1745 memcpy(s, path, len);
1746 memcpy(s + len, suffixes[0].zipped, slen + 1);
1750 maybe_warn("can't stat: %s", opath);
1754 if (S_ISDIR(sb.st_mode)) {
1760 maybe_warnx("%s is a directory", path);
1764 if (S_ISREG(sb.st_mode))
1765 handle_file(path, &sb);
1767 maybe_warnx("%s is not a regular file", path);
1774 /* compress/decompress a file */
1776 handle_file(char *file, struct stat *sbp)
1779 char outfile[PATH_MAX];
1783 usize = file_uncompress(file, outfile, sizeof(outfile));
1786 print_test(file, usize != -1);
1790 gsize = sbp->st_size;
1792 gsize = file_compress(file, outfile, sizeof(outfile));
1795 usize = sbp->st_size;
1800 if (vflag && !tflag)
1801 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1806 /* this is used with -r to recursively descend directories */
1808 handle_dir(char *dir)
1816 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
1818 warn("couldn't fts_open %s", dir);
1822 while ((entry = fts_read(fts))) {
1823 switch(entry->fts_info) {
1831 maybe_warn("%s", entry->fts_path);
1834 handle_file(entry->fts_path, entry->fts_statp);
1837 (void)fts_close(fts);
1841 /* print a ratio - size reduction as a fraction of uncompressed size */
1843 print_ratio(off_t in, off_t out, FILE *where)
1845 int percent10; /* 10 * percent */
1853 * Output is more than double size of input! print -99.9%
1854 * Quite possibly we've failed to get the original size.
1859 * We only need 12 bits of result from the final division,
1860 * so reduce the values until a 32bit division will suffice.
1862 while (in > 0x100000) {
1867 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1872 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1873 /* Move the '.' to before the last digit */
1874 buff[len - 1] = buff[len - 2];
1875 buff[len - 2] = '.';
1876 fprintf(where, "%5s%%", buff);
1880 /* print compression statistics, and the new name (if there is one!) */
1882 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1885 fprintf(stderr, "%s:%s ", file,
1886 strlen(file) < 7 ? "\t\t" : "\t");
1887 print_ratio(usize, gsize, stderr);
1889 fprintf(stderr, " -- replaced with %s", nfile);
1890 fprintf(stderr, "\n");
1894 /* print test results */
1896 print_test(const char *file, int ok)
1899 if (exit_value == 0 && ok == 0)
1901 fprintf(stderr, "%s:%s %s\n", file,
1902 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
1907 /* print a file's info ala --list */
1909 compressed uncompressed ratio uncompressed_name
1910 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
1913 print_list(int fd, off_t out, const char *outfile, time_t ts)
1915 static int first = 1;
1917 static off_t in_tot, out_tot;
1925 printf("method crc date time ");
1928 printf(" compressed uncompressed "
1929 "ratio uncompressed_name\n");
1941 /* read the last 4 bytes - this is the uncompressed size */
1942 rv = lseek(fd, (off_t)(-8), SEEK_END);
1944 unsigned char buf[8];
1947 rv = read(fd, (char *)buf, sizeof(buf));
1949 maybe_warn("read of uncompressed size");
1950 else if (rv != sizeof(buf))
1951 maybe_warnx("read of uncompressed size");
1954 usize = buf[4] | buf[5] << 8 |
1955 buf[6] << 16 | buf[7] << 24;
1958 crc = buf[0] | buf[1] << 8 |
1959 buf[2] << 16 | buf[3] << 24;
1966 if (vflag && fd == -1)
1969 char *date = ctime(&ts);
1971 /* skip the day, 1/100th second, and year */
1974 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
1979 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
1980 print_ratio(in, out, stdout);
1981 printf(" %s\n", outfile);
1984 /* display the usage of NetBSD gzip */
1989 fprintf(stderr, "%s\n", gzip_version);
1992 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n",
1994 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
1995 " -1 --fast fastest (worst) compression\n"
1996 " -2 .. -8 set compression level\n"
1997 " -9 --best best (slowest) compression\n"
1998 " -c --stdout write to stdout, keep original files\n"
2000 " -d --decompress uncompress files\n"
2002 " -f --force force overwriting & compress links\n"
2003 " -h --help display this help\n"
2004 " -k --keep don't delete input files during operation\n"
2005 " -l --list list compressed file contents\n"
2006 " -N --name save or restore original file name and time stamp\n"
2007 " -n --no-name don't save original file name or time stamp\n"
2008 " -q --quiet output no warnings\n"
2009 " -r --recursive recursively compress files in directories\n"
2010 " -S .suf use suffix .suf instead of .gz\n"
2012 " -t --test test compressed file\n"
2013 " -V --version display program version\n"
2014 " -v --verbose print extra statistics\n",
2020 /* display the version of NetBSD gzip */
2022 display_version(void)
2025 fprintf(stderr, "%s\n", gzip_version);
2029 #ifndef NO_BZIP2_SUPPORT
2030 #include "unbzip2.c"
2032 #ifndef NO_COMPRESS_SUPPORT
2033 #include "zuncompress.c"
2035 #ifndef NO_PACK_SUPPORT
2040 read_retry(int fd, void *buf, size_t sz)
2043 size_t left = MIN(sz, (size_t) SSIZE_MAX);
2048 ret = read(fd, cp, left);
2051 } else if (ret == 0) {