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gzip.c revision 1.34
      1  1.34       mrg /*	$NetBSD: gzip.c,v 1.34 2004/03/31 15:46:25 mrg Exp $	*/
      2   1.1       mrg 
      3   1.1       mrg /*
      4   1.1       mrg  * Copyright (c) 1997, 1998, 2003 Matthew R. Green
      5   1.1       mrg  * All rights reserved.
      6   1.1       mrg  *
      7   1.1       mrg  * Redistribution and use in source and binary forms, with or without
      8   1.1       mrg  * modification, are permitted provided that the following conditions
      9   1.1       mrg  * are met:
     10   1.1       mrg  * 1. Redistributions of source code must retain the above copyright
     11   1.1       mrg  *    notice, this list of conditions and the following disclaimer.
     12   1.1       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1       mrg  *    notice, this list of conditions and the following disclaimer in the
     14   1.1       mrg  *    documentation and/or other materials provided with the distribution.
     15   1.1       mrg  * 3. The name of the author may not be used to endorse or promote products
     16   1.1       mrg  *    derived from this software without specific prior written permission.
     17   1.1       mrg  *
     18   1.1       mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19   1.1       mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20   1.1       mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21   1.1       mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22   1.1       mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     23   1.1       mrg  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24   1.1       mrg  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     25   1.1       mrg  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     26   1.1       mrg  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27   1.1       mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28   1.1       mrg  * SUCH DAMAGE.
     29   1.1       mrg  */
     30   1.1       mrg 
     31   1.4       mrg #include <sys/cdefs.h>
     32   1.4       mrg #ifndef lint
     33   1.4       mrg __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003 Matthew R. Green\n\
     34   1.4       mrg      All rights reserved.\n");
     35  1.34       mrg __RCSID("$NetBSD: gzip.c,v 1.34 2004/03/31 15:46:25 mrg Exp $");
     36   1.4       mrg #endif /* not lint */
     37   1.4       mrg 
     38   1.1       mrg /*
     39   1.1       mrg  * gzip.c -- GPL free gzip using zlib.
     40   1.1       mrg  *
     41   1.6       mrg  * very minor portions of this code are (very loosely) derived from
     42   1.1       mrg  * the minigzip.c in the zlib distribution.
     43   1.6       mrg  *
     44   1.6       mrg  * TODO:
     45   1.6       mrg  *	- handle .taz/.tgz files?
     46  1.10       mrg  *	- use mmap where possible
     47  1.16       wiz  *	- handle some signals better (remove outfile?)
     48   1.1       mrg  */
     49   1.1       mrg 
     50   1.1       mrg #include <sys/param.h>
     51   1.1       mrg #include <sys/stat.h>
     52   1.1       mrg #include <sys/time.h>
     53   1.1       mrg 
     54   1.1       mrg #include <unistd.h>
     55   1.1       mrg #include <stdio.h>
     56   1.1       mrg #include <string.h>
     57   1.1       mrg #include <stdlib.h>
     58   1.1       mrg #include <err.h>
     59   1.1       mrg #include <errno.h>
     60   1.1       mrg #include <fcntl.h>
     61   1.1       mrg #include <zlib.h>
     62   1.1       mrg #include <fts.h>
     63   1.1       mrg #include <libgen.h>
     64   1.1       mrg #include <stdarg.h>
     65   1.1       mrg #include <getopt.h>
     66   1.1       mrg 
     67  1.10       mrg /* what type of file are we dealing with */
     68  1.10       mrg enum filetype {
     69  1.10       mrg 	FT_GZIP,
     70  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
     71  1.10       mrg 	FT_BZIP2,
     72  1.24   tsutsui #endif
     73  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
     74  1.22       mrg 	FT_Z,
     75  1.24   tsutsui #endif
     76  1.10       mrg 	FT_LAST,
     77  1.10       mrg 	FT_UNKNOWN
     78  1.10       mrg };
     79  1.10       mrg 
     80  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
     81  1.10       mrg #include <bzlib.h>
     82  1.10       mrg 
     83  1.24   tsutsui #define BZ2_SUFFIX	".bz2"
     84  1.24   tsutsui #define BZIP2_MAGIC	"\102\132\150"
     85  1.24   tsutsui #endif
     86  1.24   tsutsui 
     87  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
     88  1.22       mrg #define Z_SUFFIX	".Z"
     89  1.22       mrg #define Z_MAGIC		"\037\235"
     90  1.24   tsutsui #endif
     91  1.10       mrg 
     92  1.10       mrg #define GZ_SUFFIX	".gz"
     93   1.1       mrg 
     94  1.10       mrg #define BUFLEN		(32 * 1024)
     95   1.1       mrg 
     96   1.9       mrg #define GZIP_MAGIC0	0x1F
     97  1.10       mrg #define GZIP_MAGIC1	0x8B
     98  1.10       mrg #define GZIP_OMAGIC1	0x9E
     99   1.9       mrg 
    100   1.9       mrg #define ORIG_NAME 	0x08
    101   1.1       mrg 
    102   1.1       mrg /* Define this if you have the NetBSD gzopenfull(3) extension to zlib(3) */
    103  1.13       mrg #ifndef HAVE_ZLIB_GZOPENFULL
    104  1.21       mrg #define HAVE_ZLIB_GZOPENFULL 1
    105  1.13       mrg #endif
    106   1.1       mrg 
    107  1.27       mrg static	const char	gzip_version[] = "NetBSD gzip 2.2";
    108   1.1       mrg 
    109   1.3  jdolecek static	char	gzipflags[3];		/* `w' or `r', possible with [1-9] */
    110   1.1       mrg static	int	cflag;			/* stdout mode */
    111   1.1       mrg static	int	dflag;			/* decompress mode */
    112  1.25       mrg static	int	lflag;			/* list mode */
    113  1.26       mrg 
    114  1.25       mrg #ifndef SMALL
    115   1.1       mrg static	int	fflag;			/* force mode */
    116   1.1       mrg static	int	nflag;			/* don't save name/timestamp */
    117   1.1       mrg static	int	Nflag;			/* don't restore name/timestamp */
    118   1.1       mrg static	int	qflag;			/* quiet mode */
    119   1.1       mrg static	int	rflag;			/* recursive mode */
    120  1.26       mrg static	int	tflag;			/* test */
    121  1.26       mrg static	char	*Sflag;
    122  1.26       mrg static	int	vflag;			/* verbose mode */
    123  1.25       mrg #else
    124  1.25       mrg #define		qflag	0
    125  1.25       mrg #endif
    126  1.26       mrg 
    127  1.10       mrg static	char	*suffix;
    128  1.10       mrg #define suffix_len	(strlen(suffix) + 1)	/* len + nul */
    129   1.1       mrg static	char	*newfile;		/* name of newly created file */
    130   1.1       mrg static	char	*infile;		/* name of file coming in */
    131   1.1       mrg 
    132   1.1       mrg static	void	maybe_err(int rv, const char *fmt, ...);
    133   1.9       mrg static	void	maybe_errx(int rv, const char *fmt, ...);
    134   1.1       mrg static	void	maybe_warn(const char *fmt, ...);
    135   1.1       mrg static	void	maybe_warnx(const char *fmt, ...);
    136  1.32       mrg static	enum filetype file_gettype(u_char *);
    137   1.1       mrg static	void	gz_compress(FILE *, gzFile);
    138   1.1       mrg static	off_t	gz_uncompress(gzFile, FILE *);
    139  1.31       mrg static	off_t	file_compress(char *);
    140  1.31       mrg static	off_t	file_uncompress(char *);
    141   1.1       mrg static	void	handle_pathname(char *);
    142   1.1       mrg static	void	handle_file(char *, struct stat *);
    143   1.1       mrg static	void	handle_stdin(void);
    144   1.1       mrg static	void	handle_stdout(void);
    145   1.6       mrg static	void	print_ratio(off_t, off_t, FILE *);
    146   1.7       mrg static	void	print_list(int fd, off_t, const char *, time_t);
    147  1.10       mrg static	void	usage(void);
    148  1.10       mrg static	void	display_version(void);
    149  1.26       mrg 
    150  1.26       mrg #ifndef SMALL
    151  1.26       mrg static	void	prepend_gzip(char *, int *, char ***);
    152  1.26       mrg static	void	handle_dir(char *, struct stat *);
    153  1.31       mrg static	void	print_verbage(char *, char *, off_t, off_t);
    154  1.26       mrg static	void	print_test(char *, int);
    155  1.29       mrg static	void	copymodes(const char *, struct stat *);
    156  1.26       mrg #endif
    157  1.26       mrg 
    158  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
    159  1.10       mrg static	off_t	unbzip2(int, int);
    160  1.24   tsutsui #endif
    161  1.26       mrg 
    162  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
    163  1.22       mrg static	FILE 	*zopen(const char *);
    164  1.22       mrg static	off_t	zuncompress(FILE *, FILE *);
    165  1.24   tsutsui #endif
    166   1.1       mrg 
    167   1.1       mrg int main(int, char *p[]);
    168   1.1       mrg 
    169  1.11       mrg #ifdef SMALL
    170  1.11       mrg #define getopt_long(a,b,c,d,e) getopt(a,b,c)
    171  1.11       mrg #else
    172   1.3  jdolecek static const struct option longopts[] = {
    173   1.1       mrg 	{ "stdout",		no_argument,		0,	'c' },
    174   1.1       mrg 	{ "to-stdout",		no_argument,		0,	'c' },
    175   1.1       mrg 	{ "decompress",		no_argument,		0,	'd' },
    176   1.1       mrg 	{ "uncompress",		no_argument,		0,	'd' },
    177   1.1       mrg 	{ "force",		no_argument,		0,	'f' },
    178   1.1       mrg 	{ "help",		no_argument,		0,	'h' },
    179   1.5       mrg 	{ "list",		no_argument,		0,	'l' },
    180   1.1       mrg 	{ "no-name",		no_argument,		0,	'n' },
    181   1.1       mrg 	{ "name",		no_argument,		0,	'N' },
    182   1.1       mrg 	{ "quiet",		no_argument,		0,	'q' },
    183   1.1       mrg 	{ "recursive",		no_argument,		0,	'r' },
    184   1.1       mrg 	{ "suffix",		required_argument,	0,	'S' },
    185   1.1       mrg 	{ "test",		no_argument,		0,	't' },
    186   1.1       mrg 	{ "verbose",		no_argument,		0,	'v' },
    187   1.1       mrg 	{ "version",		no_argument,		0,	'V' },
    188   1.1       mrg 	{ "fast",		no_argument,		0,	'1' },
    189   1.1       mrg 	{ "best",		no_argument,		0,	'9' },
    190   1.1       mrg #if 0
    191   1.1       mrg 	/*
    192  1.10       mrg 	 * This is what else GNU gzip implements.  --ascii isn't useful
    193  1.10       mrg 	 * on NetBSD, and I don't care to have a --license.
    194   1.1       mrg 	 */
    195   1.1       mrg 	{ "ascii",		no_argument,		0,	'a' },
    196   1.1       mrg 	{ "license",		no_argument,		0,	'L' },
    197   1.1       mrg #endif
    198  1.12       mrg 	{ NULL,			no_argument,		0,	0 },
    199   1.1       mrg };
    200  1.11       mrg #endif
    201   1.1       mrg 
    202   1.1       mrg int
    203   1.1       mrg main(int argc, char **argv)
    204   1.1       mrg {
    205  1.28       mrg 	const char *progname = getprogname();
    206  1.25       mrg #ifndef SMALL
    207  1.15       mrg 	char *gzip;
    208  1.25       mrg #endif
    209   1.1       mrg 	int ch;
    210   1.1       mrg 
    211  1.15       mrg 	/* XXX set up signals */
    212  1.15       mrg 
    213   1.1       mrg 	gzipflags[0] = 'w';
    214   1.1       mrg 	gzipflags[1] = '\0';
    215   1.1       mrg 
    216  1.10       mrg 	suffix = GZ_SUFFIX;;
    217  1.10       mrg 
    218  1.25       mrg #ifndef SMALL
    219  1.15       mrg 	if ((gzip = getenv("GZIP")) != NULL)
    220  1.15       mrg 		prepend_gzip(gzip, &argc, &argv);
    221  1.28       mrg #endif
    222  1.15       mrg 
    223   1.1       mrg 	/*
    224   1.1       mrg 	 * XXX
    225   1.1       mrg 	 * handle being called `gunzip', `zcat' and `gzcat'
    226   1.1       mrg 	 */
    227   1.1       mrg 	if (strcmp(progname, "gunzip") == 0)
    228   1.1       mrg 		dflag = 1;
    229   1.1       mrg 	else if (strcmp(progname, "zcat") == 0 ||
    230   1.1       mrg 		 strcmp(progname, "gzcat") == 0)
    231   1.1       mrg 		dflag = cflag = 1;
    232  1.25       mrg 
    233  1.25       mrg #ifdef SMALL
    234  1.31       mrg #define OPT_LIST "cdhHltV123456789"
    235  1.25       mrg #else
    236  1.28       mrg #define OPT_LIST "cdfhHlnNqrS:tvV123456789"
    237  1.25       mrg #endif
    238   1.1       mrg 
    239  1.28       mrg 	while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1)
    240   1.1       mrg 		switch (ch) {
    241   1.1       mrg 		case 'c':
    242   1.1       mrg 			cflag = 1;
    243   1.1       mrg 			break;
    244   1.1       mrg 		case 'd':
    245   1.1       mrg 			dflag = 1;
    246   1.1       mrg 			break;
    247   1.5       mrg 		case 'l':
    248   1.5       mrg 			lflag = 1;
    249   1.5       mrg 			dflag = 1;
    250   1.5       mrg 			break;
    251  1.26       mrg 		case 'V':
    252  1.26       mrg 			display_version();
    253  1.26       mrg 			/* NOTREACHED */
    254  1.26       mrg 		case '1': case '2': case '3':
    255  1.26       mrg 		case '4': case '5': case '6':
    256  1.26       mrg 		case '7': case '8': case '9':
    257  1.26       mrg 			gzipflags[1] = (char)ch;
    258  1.26       mrg 			gzipflags[2] = '\0';
    259  1.26       mrg 			break;
    260  1.25       mrg #ifndef SMALL
    261  1.25       mrg 		case 'f':
    262  1.25       mrg 			fflag = 1;
    263  1.25       mrg 			break;
    264   1.1       mrg 		case 'n':
    265   1.1       mrg 			nflag = 1;
    266   1.1       mrg 			Nflag = 0;
    267   1.1       mrg 			break;
    268   1.1       mrg 		case 'N':
    269   1.1       mrg 			nflag = 0;
    270   1.1       mrg 			Nflag = 1;
    271   1.1       mrg 			break;
    272   1.1       mrg 		case 'q':
    273   1.1       mrg 			qflag = 1;
    274   1.1       mrg 			break;
    275   1.1       mrg 		case 'r':
    276   1.1       mrg 			rflag = 1;
    277   1.1       mrg 			break;
    278   1.1       mrg 		case 'S':
    279   1.1       mrg 			Sflag = optarg;
    280   1.1       mrg 			break;
    281   1.1       mrg 		case 't':
    282   1.1       mrg 			cflag = 1;
    283   1.1       mrg 			tflag = 1;
    284   1.1       mrg 			dflag = 1;
    285   1.1       mrg 			break;
    286   1.1       mrg 		case 'v':
    287   1.1       mrg 			vflag = 1;
    288   1.1       mrg 			break;
    289  1.26       mrg #endif
    290  1.12       mrg 		default:
    291  1.12       mrg 			usage();
    292  1.12       mrg 			/* NOTREACHED */
    293   1.1       mrg 		}
    294   1.1       mrg 	argv += optind;
    295   1.1       mrg 	argc -= optind;
    296   1.1       mrg 	if (dflag)
    297   1.1       mrg 		gzipflags[0] = 'r';
    298   1.1       mrg 
    299   1.1       mrg 	if (argc == 0) {
    300   1.1       mrg 		if (dflag)	/* stdin mode */
    301   1.1       mrg 			handle_stdin();
    302   1.1       mrg 		else		/* stdout mode */
    303   1.1       mrg 			handle_stdout();
    304   1.1       mrg 	} else {
    305   1.1       mrg 		do {
    306   1.1       mrg 			handle_pathname(argv[0]);
    307   1.5       mrg 		} while (*++argv);
    308   1.1       mrg 	}
    309  1.29       mrg #ifndef SMALL
    310   1.6       mrg 	if (qflag == 0 && lflag && argc > 1)
    311   1.7       mrg 		print_list(-1, 0, "(totals)", 0);
    312  1.29       mrg #endif
    313   1.1       mrg 	exit(0);
    314   1.1       mrg }
    315   1.1       mrg 
    316   1.1       mrg /* maybe print a warning */
    317   1.1       mrg void
    318   1.1       mrg maybe_warn(const char *fmt, ...)
    319   1.1       mrg {
    320   1.1       mrg 	va_list ap;
    321   1.1       mrg 
    322   1.1       mrg 	if (qflag == 0) {
    323   1.1       mrg 		va_start(ap, fmt);
    324   1.1       mrg 		vwarn(fmt, ap);
    325   1.1       mrg 		va_end(ap);
    326   1.1       mrg 	}
    327   1.1       mrg }
    328   1.1       mrg 
    329   1.1       mrg void
    330   1.1       mrg maybe_warnx(const char *fmt, ...)
    331   1.1       mrg {
    332   1.1       mrg 	va_list ap;
    333   1.1       mrg 
    334   1.1       mrg 	if (qflag == 0) {
    335   1.1       mrg 		va_start(ap, fmt);
    336   1.1       mrg 		vwarnx(fmt, ap);
    337   1.1       mrg 		va_end(ap);
    338   1.1       mrg 	}
    339   1.1       mrg }
    340   1.1       mrg 
    341   1.1       mrg /* maybe print a warning */
    342   1.1       mrg void
    343   1.1       mrg maybe_err(int rv, const char *fmt, ...)
    344   1.1       mrg {
    345   1.1       mrg 	va_list ap;
    346   1.1       mrg 
    347   1.1       mrg 	if (qflag == 0) {
    348   1.1       mrg 		va_start(ap, fmt);
    349   1.1       mrg 		vwarn(fmt, ap);
    350   1.1       mrg 		va_end(ap);
    351   1.1       mrg 	}
    352   1.1       mrg 	exit(rv);
    353   1.1       mrg }
    354   1.1       mrg 
    355   1.9       mrg /* maybe print a warning */
    356   1.9       mrg void
    357   1.9       mrg maybe_errx(int rv, const char *fmt, ...)
    358   1.9       mrg {
    359   1.9       mrg 	va_list ap;
    360   1.9       mrg 
    361   1.9       mrg 	if (qflag == 0) {
    362   1.9       mrg 		va_start(ap, fmt);
    363   1.9       mrg 		vwarnx(fmt, ap);
    364   1.9       mrg 		va_end(ap);
    365   1.9       mrg 	}
    366   1.9       mrg 	exit(rv);
    367   1.9       mrg }
    368   1.9       mrg 
    369  1.25       mrg #ifndef SMALL
    370  1.15       mrg /* split up $GZIP and prepend it to the argument list */
    371  1.15       mrg static void
    372  1.15       mrg prepend_gzip(char *gzip, int *argc, char ***argv)
    373  1.15       mrg {
    374  1.15       mrg 	char *s, **nargv, **ac;
    375  1.15       mrg 	int nenvarg = 0, i;
    376  1.15       mrg 
    377  1.15       mrg 	/* scan how many arguments there are */
    378  1.15       mrg 	for (s = gzip; *s; s++) {
    379  1.15       mrg 		if (*s == ' ' || *s == '\t')
    380  1.15       mrg 			continue;
    381  1.15       mrg 		nenvarg++;
    382  1.15       mrg 		for (; *s; s++)
    383  1.15       mrg 			if (*s == ' ' || *s == '\t')
    384  1.15       mrg 				break;
    385  1.18       mrg 		if (*s == 0)
    386  1.18       mrg 			break;
    387  1.15       mrg 	}
    388  1.15       mrg 	/* punt early */
    389  1.15       mrg 	if (nenvarg == 0)
    390  1.15       mrg 		return;
    391  1.15       mrg 
    392  1.15       mrg 	*argc += nenvarg;
    393  1.15       mrg 	ac = *argv;
    394  1.15       mrg 
    395  1.17    simonb 	nargv = (char **)malloc((*argc + 1) * sizeof(char *));
    396  1.15       mrg 	if (nargv == NULL)
    397  1.15       mrg 		maybe_err(1, "malloc");
    398  1.15       mrg 
    399  1.15       mrg 	/* stash this away */
    400  1.15       mrg 	*argv = nargv;
    401  1.15       mrg 
    402  1.15       mrg 	/* copy the program name first */
    403  1.15       mrg 	i = 0;
    404  1.15       mrg 	nargv[i++] = *(ac++);
    405  1.15       mrg 
    406  1.15       mrg 	/* take a copy of $GZIP and add it to the array */
    407  1.15       mrg 	s = strdup(gzip);
    408  1.15       mrg 	if (s == NULL)
    409  1.15       mrg 		maybe_err(1, "strdup");
    410  1.15       mrg 	for (; *s; s++) {
    411  1.15       mrg 		if (*s == ' ' || *s == '\t')
    412  1.15       mrg 			continue;
    413  1.15       mrg 		nargv[i++] = s;
    414  1.15       mrg 		for (; *s; s++)
    415  1.15       mrg 			if (*s == ' ' || *s == '\t') {
    416  1.15       mrg 				*s = 0;
    417  1.15       mrg 				break;
    418  1.15       mrg 			}
    419  1.15       mrg 	}
    420  1.15       mrg 
    421  1.15       mrg 	/* copy the original arguments and a NULL */
    422  1.15       mrg 	while (*ac)
    423  1.15       mrg 		nargv[i++] = *(ac++);
    424  1.15       mrg 	nargv[i] = NULL;
    425  1.15       mrg }
    426  1.25       mrg #endif
    427  1.15       mrg 
    428   1.1       mrg /* compress input to output then close both files */
    429   1.1       mrg static void
    430   1.1       mrg gz_compress(FILE *in, gzFile out)
    431   1.1       mrg {
    432   1.1       mrg 	char buf[BUFLEN];
    433   1.1       mrg 	ssize_t len;
    434   1.1       mrg 	int i;
    435   1.1       mrg 
    436   1.1       mrg 	for (;;) {
    437   1.1       mrg 		len = fread(buf, 1, sizeof(buf), in);
    438   1.1       mrg 		if (ferror(in))
    439   1.1       mrg 			maybe_err(1, "fread");
    440   1.1       mrg 		if (len == 0)
    441   1.1       mrg 			break;
    442   1.1       mrg 
    443   1.1       mrg 		if ((ssize_t)gzwrite(out, buf, len) != len)
    444   1.1       mrg 			maybe_err(1, gzerror(out, &i));
    445   1.1       mrg 	}
    446   1.1       mrg 	if (fclose(in) < 0)
    447   1.1       mrg 		maybe_err(1, "failed fclose");
    448   1.1       mrg 	if (gzclose(out) != Z_OK)
    449   1.1       mrg 		maybe_err(1, "failed gzclose");
    450   1.1       mrg }
    451   1.1       mrg 
    452   1.1       mrg /* uncompress input to output then close the input */
    453   1.1       mrg static off_t
    454   1.1       mrg gz_uncompress(gzFile in, FILE *out)
    455   1.1       mrg {
    456   1.1       mrg 	char buf[BUFLEN];
    457   1.1       mrg 	off_t size;
    458   1.1       mrg 	ssize_t len;
    459   1.1       mrg 	int i;
    460   1.1       mrg 
    461   1.1       mrg 	for (size = 0;;) {
    462   1.1       mrg 		len = gzread(in, buf, sizeof(buf));
    463   1.1       mrg 
    464   1.1       mrg 		if (len < 0) {
    465  1.26       mrg #ifndef SMALL
    466   1.1       mrg 			if (tflag) {
    467   1.1       mrg 				print_test(infile, 0);
    468   1.1       mrg 				return (0);
    469   1.1       mrg 			} else
    470  1.26       mrg #endif
    471  1.10       mrg 				maybe_errx(1, gzerror(in, &i));
    472   1.1       mrg 		} else if (len == 0) {
    473  1.26       mrg #ifndef SMALL
    474   1.1       mrg 			if (tflag)
    475   1.1       mrg 				print_test(infile, 1);
    476  1.26       mrg #endif
    477   1.1       mrg 			break;
    478   1.1       mrg 		}
    479   1.1       mrg 
    480   1.1       mrg 		size += len;
    481   1.1       mrg 
    482  1.26       mrg #ifndef SMALL
    483   1.1       mrg 		/* don't write anything with -t */
    484   1.1       mrg 		if (tflag)
    485   1.1       mrg 			continue;
    486  1.26       mrg #endif
    487   1.1       mrg 
    488   1.1       mrg 		if (fwrite(buf, 1, (unsigned)len, out) != (ssize_t)len)
    489   1.1       mrg 			maybe_err(1, "failed fwrite");
    490   1.1       mrg 	}
    491   1.1       mrg 	if (gzclose(in) != Z_OK)
    492  1.10       mrg 		maybe_errx(1, "failed gzclose");
    493   1.1       mrg 
    494   1.1       mrg 	return (size);
    495   1.1       mrg }
    496   1.1       mrg 
    497  1.29       mrg #ifndef SMALL
    498   1.1       mrg /*
    499   1.1       mrg  * set the owner, mode, flags & utimes for a file
    500   1.1       mrg  */
    501   1.1       mrg static void
    502   1.1       mrg copymodes(const char *file, struct stat *sbp)
    503   1.1       mrg {
    504   1.1       mrg 	struct timeval times[2];
    505   1.1       mrg 
    506   1.1       mrg 	/*
    507   1.1       mrg 	 * If we have no info on the input, give this file some
    508   1.1       mrg 	 * default values and return..
    509   1.1       mrg 	 */
    510   1.1       mrg 	if (sbp == NULL) {
    511   1.1       mrg 		mode_t mask = umask(022);
    512   1.1       mrg 
    513   1.1       mrg 		(void)chmod(file, DEFFILEMODE & ~mask);
    514   1.1       mrg 		(void)umask(mask);
    515   1.1       mrg 		return;
    516   1.1       mrg 	}
    517   1.1       mrg 
    518   1.1       mrg 	/* if the chown fails, remove set-id bits as-per compress(1) */
    519   1.1       mrg 	if (chown(file, sbp->st_uid, sbp->st_gid) < 0) {
    520   1.1       mrg 		if (errno != EPERM)
    521   1.1       mrg 			maybe_warn("couldn't chown: %s", file);
    522   1.1       mrg 		sbp->st_mode &= ~(S_ISUID|S_ISGID);
    523   1.1       mrg 	}
    524   1.1       mrg 
    525   1.1       mrg 	/* we only allow set-id and the 9 normal permission bits */
    526   1.1       mrg 	sbp->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
    527   1.1       mrg 	if (chmod(file, sbp->st_mode) < 0)
    528   1.1       mrg 		maybe_warn("couldn't chmod: %s", file);
    529   1.1       mrg 
    530   1.1       mrg 	/* only try flags if they exist already */
    531   1.1       mrg         if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0)
    532   1.1       mrg 		maybe_warn("couldn't chflags: %s", file);
    533   1.1       mrg 
    534   1.1       mrg 	TIMESPEC_TO_TIMEVAL(&times[0], &sbp->st_atimespec);
    535   1.1       mrg 	TIMESPEC_TO_TIMEVAL(&times[1], &sbp->st_mtimespec);
    536   1.1       mrg 	if (utimes(file, times) < 0)
    537   1.1       mrg 		maybe_warn("couldn't utimes: %s", file);
    538   1.1       mrg }
    539  1.29       mrg #endif
    540   1.1       mrg 
    541  1.32       mrg /* what sort of file is this? */
    542  1.32       mrg static enum filetype
    543  1.32       mrg file_gettype(u_char *buf)
    544  1.32       mrg {
    545  1.32       mrg 
    546  1.32       mrg 	if (buf[0] == GZIP_MAGIC0 &&
    547  1.32       mrg 	    (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
    548  1.32       mrg 		return FT_GZIP;
    549  1.32       mrg 	else
    550  1.32       mrg #ifndef NO_BZIP2_SUPPORT
    551  1.32       mrg 	if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
    552  1.32       mrg 	    buf[3] >= '0' && buf[3] <= '9')
    553  1.32       mrg 		return FT_BZIP2;
    554  1.32       mrg 	else
    555  1.32       mrg #endif
    556  1.32       mrg #ifndef NO_COMPRESS_SUPPORT
    557  1.32       mrg 	if (memcmp(buf, Z_MAGIC, 2) == 0)
    558  1.32       mrg 		return FT_Z;
    559  1.32       mrg 	else
    560  1.32       mrg #endif
    561  1.32       mrg 		return FT_UNKNOWN;
    562  1.32       mrg }
    563  1.32       mrg 
    564   1.1       mrg /*
    565   1.1       mrg  * compress the given file: create a corresponding .gz file and remove the
    566   1.1       mrg  * original.
    567   1.1       mrg  */
    568  1.31       mrg static off_t
    569   1.1       mrg file_compress(char *file)
    570   1.1       mrg {
    571   1.1       mrg 	FILE *in;
    572   1.1       mrg 	gzFile out;
    573   1.1       mrg 	struct stat isb, osb;
    574   1.5       mrg 	char outfile[MAXPATHLEN];
    575  1.31       mrg 	off_t size;
    576  1.25       mrg #ifndef SMALL
    577   1.1       mrg 	u_int32_t mtime = 0;
    578  1.25       mrg #endif
    579   1.1       mrg 
    580   1.1       mrg 	if (cflag == 0) {
    581   1.1       mrg 		(void)strncpy(outfile, file, MAXPATHLEN - suffix_len);
    582   1.1       mrg 		outfile[MAXPATHLEN - suffix_len] = '\0';
    583  1.10       mrg 		(void)strlcat(outfile, suffix, sizeof(outfile));
    584   1.1       mrg 
    585  1.25       mrg #ifndef SMALL
    586   1.1       mrg 		if (fflag == 0) {
    587   1.1       mrg 			if (stat(outfile, &osb) == 0) {
    588   1.1       mrg 				maybe_warnx("%s already exists -- skipping",
    589   1.1       mrg 					      outfile);
    590   1.1       mrg 				goto lose;
    591   1.1       mrg 			}
    592   1.1       mrg 		}
    593   1.1       mrg 		if (stat(file, &isb) == 0) {
    594  1.33      tron 			if (isb.st_nlink > 1 && fflag == 0) {
    595   1.1       mrg 				maybe_warnx("%s has %d other link%s -- "
    596  1.33      tron 					    "skipping", file, isb.st_nlink - 1,
    597   1.1       mrg 					    isb.st_nlink == 1 ? "" : "s");
    598   1.1       mrg 				goto lose;
    599   1.1       mrg 			}
    600   1.1       mrg 			if (nflag == 0)
    601   1.1       mrg 				mtime = (u_int32_t)isb.st_mtime;
    602  1.34       mrg 		}
    603  1.25       mrg #endif
    604   1.1       mrg 	}
    605   1.1       mrg 	in = fopen(file, "r");
    606   1.1       mrg 	if (in == 0)
    607   1.1       mrg 		maybe_err(1, "can't fopen %s", file);
    608   1.1       mrg 
    609   1.1       mrg 	if (cflag == 0) {
    610  1.25       mrg #if HAVE_ZLIB_GZOPENFULL && !defined(SMALL)
    611   1.1       mrg 		char *savename;
    612   1.1       mrg 
    613   1.1       mrg 		if (nflag == 0)
    614   1.1       mrg 			savename = basename(file);
    615   1.1       mrg 		else
    616   1.1       mrg 			savename = NULL;
    617   1.1       mrg 		out = gzopenfull(outfile, gzipflags, savename, mtime);
    618   1.1       mrg #else
    619   1.1       mrg 		out = gzopen(outfile, gzipflags);
    620   1.1       mrg #endif
    621   1.1       mrg 	} else
    622   1.1       mrg 		out = gzdopen(STDOUT_FILENO, gzipflags);
    623   1.1       mrg 
    624   1.1       mrg 	if (out == 0)
    625   1.1       mrg 		maybe_err(1, "can't gz%sopen %s",
    626   1.1       mrg 		    cflag ? "d"         : "",
    627   1.1       mrg 		    cflag ? "stdout"    : outfile);
    628   1.1       mrg 
    629   1.1       mrg 	gz_compress(in, out);
    630   1.1       mrg 
    631   1.1       mrg 	/*
    632   1.1       mrg 	 * if we compressed to stdout, we don't know the size and
    633   1.1       mrg 	 * we don't know the new file name, punt.  if we can't stat
    634   1.1       mrg 	 * the file, whine, otherwise set the size from the stat
    635   1.1       mrg 	 * buffer.  we only blow away the file if we can stat the
    636   1.1       mrg 	 * output, just in case.
    637   1.1       mrg 	 */
    638   1.1       mrg 	if (cflag == 0) {
    639   1.1       mrg 		if (stat(outfile, &osb) < 0) {
    640   1.1       mrg 			maybe_warn("couldn't stat: %s", outfile);
    641   1.1       mrg 			maybe_warnx("leaving original %s", file);
    642   1.1       mrg 			size = 0;
    643   1.1       mrg 		} else {
    644   1.1       mrg 			unlink(file);
    645   1.1       mrg 			size = osb.st_size;
    646   1.1       mrg 		}
    647   1.1       mrg 		newfile = outfile;
    648  1.29       mrg #ifndef SMALL
    649   1.1       mrg 		copymodes(outfile, &isb);
    650  1.29       mrg #endif
    651   1.1       mrg 	} else {
    652   1.1       mrg lose:
    653   1.1       mrg 		size = 0;
    654   1.1       mrg 		newfile = 0;
    655   1.1       mrg 	}
    656   1.1       mrg 
    657   1.1       mrg 	return (size);
    658   1.1       mrg }
    659   1.1       mrg 
    660   1.1       mrg /* uncompress the given file and remove the original */
    661  1.31       mrg static off_t
    662   1.1       mrg file_uncompress(char *file)
    663   1.1       mrg {
    664   1.1       mrg 	struct stat isb, osb;
    665   1.5       mrg 	char buf[PATH_MAX];
    666   1.1       mrg 	char *outfile = buf, *s;
    667   1.1       mrg 	FILE *out;
    668   1.1       mrg 	gzFile in;
    669   1.1       mrg 	off_t size;
    670   1.1       mrg 	ssize_t len = strlen(file);
    671   1.9       mrg 	int fd;
    672   1.9       mrg 	unsigned char header1[10], name[PATH_MAX + 1];
    673  1.10       mrg 	enum filetype method;
    674   1.9       mrg 
    675   1.9       mrg 	/* gather the old name info */
    676   1.1       mrg 
    677   1.9       mrg 	fd = open(file, O_RDONLY);
    678   1.9       mrg 	if (fd < 0)
    679   1.9       mrg 		maybe_err(1, "can't open %s", file);
    680  1.10       mrg 	if (read(fd, header1, 10) != 10) {
    681  1.10       mrg 		/* we don't want to fail here. */
    682  1.25       mrg #ifndef SMALL
    683  1.10       mrg 		if (fflag)
    684  1.10       mrg 			goto close_it;
    685  1.25       mrg #endif
    686   1.9       mrg 		maybe_err(1, "can't read %s", file);
    687  1.10       mrg 	}
    688  1.10       mrg 
    689  1.32       mrg 	method = file_gettype(header1);
    690  1.29       mrg 
    691  1.32       mrg #ifndef SMALL
    692  1.32       mrg 	if (Sflag == NULL) {
    693  1.32       mrg # ifndef NO_BZIP2_SUPPORT
    694  1.32       mrg 		if (method == FT_BZIP2)
    695  1.10       mrg 			suffix = BZ2_SUFFIX;
    696  1.32       mrg 		else
    697  1.26       mrg # endif
    698  1.32       mrg # ifndef NO_COMPRESS_SUPPORT
    699  1.32       mrg 		if (method == FT_Z)
    700  1.22       mrg 			suffix = Z_SUFFIX;
    701  1.26       mrg # endif
    702  1.32       mrg 	}
    703   1.9       mrg 
    704  1.10       mrg 	if (fflag == 0 && method == FT_UNKNOWN)
    705   1.9       mrg 		maybe_errx(1, "%s: not in gzip format", file);
    706  1.25       mrg #endif
    707   1.9       mrg 
    708  1.10       mrg 	if (cflag == 0 || lflag) {
    709  1.10       mrg 		s = &file[len - suffix_len + 1];
    710  1.10       mrg 		if (strncmp(s, suffix, suffix_len) == 0) {
    711  1.10       mrg 			(void)strncpy(outfile, file, len - suffix_len + 1);
    712  1.10       mrg 			outfile[len - suffix_len + 1] = '\0';
    713  1.10       mrg 		} else if (lflag == 0)
    714  1.10       mrg 			maybe_errx(1, "unknown suffix %s", s);
    715  1.10       mrg 	}
    716  1.10       mrg 
    717  1.25       mrg #ifdef SMALL
    718  1.25       mrg 	if (method == FT_GZIP && lflag)
    719  1.25       mrg #else
    720  1.25       mrg 	if (method == FT_GZIP && (Nflag || lflag))
    721  1.25       mrg #endif
    722  1.25       mrg 	{
    723   1.9       mrg 		if (header1[3] & ORIG_NAME) {
    724   1.9       mrg 			size_t rbytes;
    725   1.9       mrg 			int i;
    726   1.9       mrg 
    727   1.9       mrg 			rbytes = read(fd, name, PATH_MAX + 1);
    728   1.9       mrg 			if (rbytes < 0)
    729   1.1       mrg 				maybe_err(1, "can't read %s", file);
    730   1.9       mrg 			for (i = 0; i < rbytes && name[i]; i++)
    731   1.9       mrg 				;
    732   1.9       mrg 			if (i < rbytes) {
    733   1.9       mrg 				name[i] = 0;
    734   1.9       mrg 				/* now maybe merge old dirname */
    735   1.9       mrg 				if (strchr(outfile, '/') == 0)
    736   1.9       mrg 					outfile = name;
    737   1.9       mrg 				else {
    738   1.9       mrg 					char *dir = dirname(outfile);
    739   1.9       mrg 					if (asprintf(&outfile, "%s/%s", dir,
    740   1.9       mrg 					    name) == -1)
    741   1.9       mrg 						maybe_err(1, "malloc");
    742   1.1       mrg 				}
    743   1.1       mrg 			}
    744   1.1       mrg 		}
    745   1.9       mrg 	}
    746  1.25       mrg #ifndef SMALL
    747  1.10       mrg close_it:
    748  1.25       mrg #endif
    749   1.9       mrg 	close(fd);
    750   1.1       mrg 
    751  1.31       mrg 	if (cflag == 0 || lflag) {
    752  1.25       mrg #ifndef SMALL
    753  1.31       mrg 		if (fflag == 0 && lflag == 0 && stat(outfile, &osb) == 0) {
    754   1.9       mrg 			maybe_warnx("%s already exists -- skipping", outfile);
    755   1.9       mrg 			goto lose;
    756   1.9       mrg 		}
    757  1.31       mrg #endif
    758   1.9       mrg 		if (stat(file, &isb) == 0) {
    759  1.31       mrg #ifndef SMALL
    760  1.33      tron 			if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
    761   1.9       mrg 				maybe_warnx("%s has %d other links -- skipping",
    762   1.9       mrg 				    file, isb.st_nlink - 1);
    763   1.1       mrg 				goto lose;
    764   1.1       mrg 			}
    765  1.31       mrg #endif
    766   1.9       mrg 		} else
    767   1.9       mrg 			goto lose;
    768   1.1       mrg 	}
    769   1.5       mrg 
    770  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
    771  1.10       mrg 	if (method == FT_BZIP2) {
    772  1.10       mrg 		int in, out;
    773   1.5       mrg 
    774  1.30       mrg 		/* XXX */
    775  1.26       mrg 		if (lflag)
    776  1.26       mrg 			maybe_errx(1, "no -l with bzip2 files");
    777  1.26       mrg 
    778  1.10       mrg 		if ((in = open(file, O_RDONLY)) == -1)
    779  1.10       mrg 			maybe_err(1, "open for read: %s", file);
    780  1.10       mrg 		if (cflag == 1)
    781  1.10       mrg 			out = STDOUT_FILENO;
    782  1.10       mrg 		else
    783  1.10       mrg 			out = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
    784  1.10       mrg 		if (out == -1)
    785  1.10       mrg 			maybe_err(1, "open for write: %s", outfile);
    786   1.5       mrg 
    787  1.10       mrg 		if ((size = unbzip2(in, out)) == 0) {
    788  1.10       mrg 			unlink(outfile);
    789  1.10       mrg 			goto lose;
    790  1.10       mrg 		}
    791  1.24   tsutsui 	} else
    792  1.24   tsutsui #endif
    793  1.29       mrg 
    794  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
    795  1.24   tsutsui 	if (method == FT_Z) {
    796  1.22       mrg 		FILE *in, *out;
    797  1.22       mrg 		int fd;
    798  1.22       mrg 
    799  1.30       mrg 		/* XXX */
    800  1.26       mrg 		if (lflag)
    801  1.26       mrg 			maybe_errx(1, "no -l with Lempel-Ziv files");
    802  1.26       mrg 
    803  1.22       mrg 		if ((in = zopen(file)) == NULL)
    804  1.22       mrg 			maybe_err(1, "open for read: %s", file);
    805  1.22       mrg 
    806  1.22       mrg 		if (cflag == 1)
    807  1.22       mrg 			fd = STDOUT_FILENO;
    808  1.22       mrg 		else {
    809  1.22       mrg 			fd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
    810  1.22       mrg 			if (fd == -1)
    811  1.22       mrg 				maybe_err(1, "open for write: %s", outfile);
    812  1.22       mrg 		}
    813  1.22       mrg 		out = fdopen(fd, "w");
    814  1.22       mrg 		if (out == NULL)
    815  1.22       mrg 			maybe_err(1, "open for write: %s", outfile);
    816  1.22       mrg 
    817  1.22       mrg 		if ((size = zuncompress(in, out)) == 0) {
    818  1.22       mrg 			unlink(outfile);
    819  1.22       mrg 			goto lose;
    820  1.22       mrg 		}
    821  1.22       mrg 		if (ferror(in) || fclose(in)) {
    822  1.22       mrg 			unlink(outfile);
    823  1.22       mrg 			maybe_err(1, "failed infile fclose");
    824  1.22       mrg 		}
    825  1.22       mrg 		if (fclose(out)) {
    826  1.22       mrg 			unlink(outfile);
    827  1.22       mrg 			maybe_err(1, "failed outfile close");
    828  1.22       mrg 		}
    829  1.24   tsutsui 	} else
    830  1.24   tsutsui #endif
    831  1.24   tsutsui 	{
    832  1.10       mrg 		if (lflag) {
    833  1.10       mrg 			int fd;
    834   1.1       mrg 
    835  1.10       mrg 			if ((fd = open(file, O_RDONLY)) == -1)
    836  1.10       mrg 				maybe_err(1, "open");
    837  1.10       mrg 			print_list(fd, isb.st_size, outfile, isb.st_mtime);
    838  1.10       mrg 			return 0;	/* XXX */
    839  1.10       mrg 		}
    840  1.10       mrg 
    841  1.10       mrg 		in = gzopen(file, gzipflags);
    842  1.10       mrg 		if (in == NULL)
    843  1.10       mrg 			maybe_err(1, "can't gzopen %s", file);
    844  1.10       mrg 
    845  1.10       mrg 		if (cflag == 0) {
    846  1.10       mrg 			int fd;
    847  1.10       mrg 
    848  1.10       mrg 			/* Use open(2) directly to get a safe file.  */
    849  1.10       mrg 			fd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
    850  1.10       mrg 			if (fd < 0)
    851  1.10       mrg 				maybe_err(1, "can't open %s", outfile);
    852  1.10       mrg 			out = fdopen(fd, "w");
    853  1.10       mrg 			if (out == NULL)
    854  1.10       mrg 				maybe_err(1, "can't fdopen %s", outfile);
    855  1.10       mrg 		} else
    856  1.10       mrg 			out = stdout;
    857   1.1       mrg 
    858  1.10       mrg 		if ((size = gz_uncompress(in, out)) == 0) {
    859  1.10       mrg 			unlink(outfile);
    860  1.10       mrg 			goto lose;
    861  1.10       mrg 		}
    862  1.10       mrg 		if (fclose(out))
    863  1.10       mrg 			maybe_err(1, "failed fclose");
    864  1.10       mrg 	}
    865   1.1       mrg 
    866   1.1       mrg 	/* if testing, or we uncompressed to stdout, this is all we need */
    867  1.26       mrg #ifndef SMALL
    868  1.26       mrg 	if (tflag)
    869  1.26       mrg 		return (size);
    870  1.26       mrg #endif
    871  1.26       mrg 	if (cflag)
    872   1.1       mrg 		return (size);
    873   1.1       mrg 
    874   1.1       mrg 	/*
    875   1.1       mrg 	 * if we create a file...
    876   1.1       mrg 	 */
    877   1.1       mrg 	if (cflag == 0) {
    878   1.1       mrg 		/*
    879   1.1       mrg 		 * if we can't stat the file, or we are uncompressing to
    880   1.1       mrg 		 * stdin, don't remove the file.
    881   1.1       mrg 		 */
    882   1.1       mrg 		if (stat(outfile, &osb) < 0) {
    883   1.1       mrg 			maybe_warn("couldn't stat (leaving original): %s",
    884   1.1       mrg 				   outfile);
    885   1.1       mrg 			goto lose;
    886   1.1       mrg 		}
    887   1.1       mrg 		if (osb.st_size != size) {
    888   1.1       mrg 			maybe_warn("stat gave different size: %llu != %llu "
    889   1.1       mrg 			    "(leaving original)",
    890   1.1       mrg 			    (unsigned long long)size,
    891   1.1       mrg 			    (unsigned long long)osb.st_size);
    892   1.1       mrg 			goto lose;
    893   1.1       mrg 		}
    894   1.1       mrg 		newfile = outfile;
    895   1.1       mrg 		unlink(file);
    896   1.1       mrg 		size = osb.st_size;
    897  1.29       mrg #ifndef SMALL
    898   1.1       mrg 		copymodes(outfile, &isb);
    899  1.29       mrg #endif
    900   1.1       mrg 	}
    901   1.1       mrg 	return (size);
    902   1.1       mrg 
    903   1.1       mrg lose:
    904   1.1       mrg 	newfile = 0;
    905  1.22       mrg 	return 0;
    906   1.1       mrg }
    907   1.1       mrg 
    908   1.1       mrg static void
    909   1.1       mrg handle_stdin(void)
    910   1.1       mrg {
    911   1.1       mrg 	gzFile *file;
    912   1.1       mrg 
    913  1.25       mrg #ifndef SMALL
    914   1.5       mrg 	if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
    915   1.1       mrg 		maybe_warnx("standard input is a terminal -- ignoring");
    916   1.1       mrg 		return;
    917   1.1       mrg 	}
    918  1.25       mrg #endif
    919   1.5       mrg 
    920   1.5       mrg 	if (lflag) {
    921   1.5       mrg 		struct stat isb;
    922   1.5       mrg 
    923   1.5       mrg 		if (fstat(STDIN_FILENO, &isb) < 0)
    924   1.5       mrg 			maybe_err(1, "fstat");
    925   1.7       mrg 		print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
    926   1.5       mrg 		return;
    927   1.5       mrg 	}
    928   1.5       mrg 
    929   1.1       mrg 	file = gzdopen(STDIN_FILENO, gzipflags);
    930   1.1       mrg 	if (file == NULL)
    931   1.1       mrg 		maybe_err(1, "can't gzdopen stdin");
    932   1.1       mrg 	gz_uncompress(file, stdout);
    933   1.1       mrg }
    934   1.1       mrg 
    935   1.1       mrg static void
    936   1.1       mrg handle_stdout(void)
    937   1.1       mrg {
    938   1.1       mrg 	gzFile *file;
    939   1.1       mrg 
    940  1.25       mrg #ifndef SMALL
    941   1.1       mrg 	if (fflag == 0 && isatty(STDOUT_FILENO)) {
    942   1.1       mrg 		maybe_warnx("standard output is a terminal -- ignoring");
    943   1.1       mrg 		return;
    944   1.1       mrg 	}
    945  1.25       mrg #endif
    946   1.1       mrg 	file = gzdopen(STDOUT_FILENO, gzipflags);
    947   1.1       mrg 	if (file == NULL)
    948   1.1       mrg 		maybe_err(1, "can't gzdopen stdout");
    949   1.1       mrg 	gz_compress(stdin, file);
    950   1.1       mrg }
    951   1.1       mrg 
    952   1.1       mrg /* do what is asked for, for the path name */
    953   1.1       mrg static void
    954   1.1       mrg handle_pathname(char *path)
    955   1.1       mrg {
    956   1.1       mrg 	char *opath = path, *s = 0;
    957   1.1       mrg 	ssize_t len;
    958   1.1       mrg 	struct stat sb;
    959   1.1       mrg 
    960   1.1       mrg 	/* check for stdout/stdin */
    961   1.1       mrg 	if (path[0] == '-' && path[1] == '\0') {
    962   1.1       mrg 		if (dflag)
    963   1.1       mrg 			handle_stdin();
    964   1.1       mrg 		else
    965   1.1       mrg 			handle_stdout();
    966   1.1       mrg 	}
    967   1.1       mrg 
    968   1.1       mrg retry:
    969   1.1       mrg 	if (stat(path, &sb) < 0) {
    970   1.1       mrg 		/* lets try <path>.gz if we're decompressing */
    971   1.1       mrg 		if (dflag && s == 0 && errno == ENOENT) {
    972   1.1       mrg 			len = strlen(path);
    973   1.1       mrg 			s = malloc(len + suffix_len);
    974   1.1       mrg 			if (s == 0)
    975   1.1       mrg 				maybe_err(1, "malloc");
    976   1.1       mrg 			memmove(s, path, len);
    977  1.10       mrg 			memmove(&s[len], suffix, suffix_len);
    978   1.1       mrg 			path = s;
    979   1.1       mrg 			goto retry;
    980   1.1       mrg 		}
    981   1.1       mrg 		maybe_warn("can't stat: %s", opath);
    982   1.1       mrg 		goto out;
    983   1.1       mrg 	}
    984   1.1       mrg 
    985   1.1       mrg 	if (S_ISDIR(sb.st_mode)) {
    986  1.25       mrg #ifndef SMALL
    987   1.1       mrg 		if (rflag)
    988   1.1       mrg 			handle_dir(path, &sb);
    989   1.1       mrg 		else
    990  1.25       mrg #endif
    991   1.1       mrg 			maybe_warn("%s is a directory", path);
    992   1.1       mrg 		goto out;
    993   1.1       mrg 	}
    994   1.1       mrg 
    995   1.1       mrg 	if (S_ISREG(sb.st_mode))
    996   1.1       mrg 		handle_file(path, &sb);
    997   1.1       mrg 
    998   1.1       mrg out:
    999   1.1       mrg 	if (s)
   1000   1.1       mrg 		free(s);
   1001   1.1       mrg }
   1002   1.1       mrg 
   1003   1.1       mrg /* compress/decompress a file */
   1004   1.1       mrg static void
   1005   1.1       mrg handle_file(char *file, struct stat *sbp)
   1006   1.1       mrg {
   1007  1.31       mrg 	off_t usize, gsize;
   1008   1.1       mrg 
   1009   1.1       mrg 	infile = file;
   1010   1.1       mrg 	if (dflag) {
   1011   1.1       mrg 		usize = file_uncompress(file);
   1012   1.1       mrg 		if (usize == 0)
   1013   1.1       mrg 			return;
   1014   1.1       mrg 		gsize = sbp->st_size;
   1015   1.1       mrg 	} else {
   1016   1.1       mrg 		gsize = file_compress(file);
   1017   1.1       mrg 		if (gsize == 0)
   1018   1.1       mrg 			return;
   1019   1.1       mrg 		usize = sbp->st_size;
   1020   1.1       mrg 	}
   1021   1.1       mrg 
   1022  1.26       mrg 
   1023  1.26       mrg #ifndef SMALL
   1024   1.1       mrg 	if (vflag && !tflag)
   1025   1.1       mrg 		print_verbage(file, cflag == 0 ? newfile : 0, usize, gsize);
   1026  1.26       mrg #endif
   1027   1.1       mrg }
   1028   1.1       mrg 
   1029  1.25       mrg #ifndef SMALL
   1030   1.1       mrg /* this is used with -r to recursively decend directories */
   1031   1.1       mrg static void
   1032   1.1       mrg handle_dir(char *dir, struct stat *sbp)
   1033   1.1       mrg {
   1034   1.1       mrg 	char *path_argv[2];
   1035   1.1       mrg 	FTS *fts;
   1036   1.1       mrg 	FTSENT *entry;
   1037   1.1       mrg 
   1038   1.1       mrg 	path_argv[0] = dir;
   1039   1.1       mrg 	path_argv[1] = 0;
   1040   1.1       mrg 	fts = fts_open(path_argv, FTS_PHYSICAL, NULL);
   1041   1.1       mrg 	if (fts == NULL) {
   1042   1.1       mrg 		warn("couldn't fts_open %s", dir);
   1043   1.1       mrg 		return;
   1044   1.1       mrg 	}
   1045   1.1       mrg 
   1046   1.1       mrg 	while ((entry = fts_read(fts))) {
   1047   1.1       mrg 		switch(entry->fts_info) {
   1048   1.1       mrg 		case FTS_D:
   1049   1.1       mrg 		case FTS_DP:
   1050   1.1       mrg 			continue;
   1051   1.1       mrg 
   1052   1.1       mrg 		case FTS_DNR:
   1053   1.1       mrg 		case FTS_ERR:
   1054   1.1       mrg 		case FTS_NS:
   1055   1.1       mrg 			maybe_warn("%s", entry->fts_path);
   1056   1.1       mrg 			continue;
   1057   1.1       mrg 		case FTS_F:
   1058   1.1       mrg 			handle_file(entry->fts_name, entry->fts_statp);
   1059   1.1       mrg 		}
   1060   1.1       mrg 	}
   1061   1.1       mrg 	(void)fts_close(fts);
   1062   1.1       mrg }
   1063  1.25       mrg #endif
   1064   1.1       mrg 
   1065   1.6       mrg /* print a ratio */
   1066   1.6       mrg static void
   1067   1.6       mrg print_ratio(off_t in, off_t out, FILE *where)
   1068   1.6       mrg {
   1069   1.6       mrg 	u_int64_t percent;
   1070   1.6       mrg 
   1071   1.6       mrg 	if (out == 0)
   1072   1.6       mrg 		percent = 0;
   1073   1.6       mrg 	else
   1074  1.31       mrg 		percent = 1000 - ((in * 1000ULL) / out);
   1075   1.6       mrg 	fprintf(where, "%3lu.%1lu%%", (unsigned long)percent / 10UL,
   1076   1.6       mrg 	    (unsigned long)percent % 10);
   1077   1.6       mrg }
   1078   1.6       mrg 
   1079  1.26       mrg #ifndef SMALL
   1080   1.1       mrg /* print compression statistics, and the new name (if there is one!) */
   1081   1.1       mrg static void
   1082  1.31       mrg print_verbage(char *file, char *nfile, off_t usize, off_t gsize)
   1083   1.1       mrg {
   1084   1.6       mrg 	fprintf(stderr, "%s:%s  ", file,
   1085   1.6       mrg 	    strlen(file) < 7 ? "\t\t" : "\t");
   1086  1.31       mrg 	print_ratio((off_t)usize, (off_t)gsize, stderr);
   1087   1.4       mrg 	if (nfile)
   1088   1.4       mrg 		fprintf(stderr, " -- replaced with %s", nfile);
   1089   1.1       mrg 	fprintf(stderr, "\n");
   1090   1.1       mrg 	fflush(stderr);
   1091   1.1       mrg }
   1092   1.1       mrg 
   1093   1.1       mrg /* print test results */
   1094   1.1       mrg static void
   1095   1.1       mrg print_test(char *file, int ok)
   1096   1.1       mrg {
   1097   1.1       mrg 
   1098   1.1       mrg 	fprintf(stderr, "%s:%s  %s\n", file,
   1099   1.1       mrg 	    strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
   1100   1.1       mrg 	fflush(stderr);
   1101   1.1       mrg }
   1102  1.26       mrg #endif
   1103   1.1       mrg 
   1104   1.5       mrg /* print a file's info ala --list */
   1105   1.5       mrg /* eg:
   1106   1.5       mrg   compressed uncompressed  ratio uncompressed_name
   1107   1.5       mrg       354841      1679360  78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
   1108   1.5       mrg */
   1109   1.5       mrg static void
   1110   1.7       mrg print_list(int fd, off_t in, const char *outfile, time_t ts)
   1111   1.5       mrg {
   1112   1.5       mrg 	static int first = 1;
   1113  1.29       mrg #ifndef SMALL
   1114   1.6       mrg 	static off_t in_tot, out_tot;
   1115  1.29       mrg 	u_int32_t crc;
   1116  1.29       mrg #endif
   1117   1.6       mrg 	off_t out;
   1118   1.5       mrg 	int rv;
   1119   1.5       mrg 
   1120   1.7       mrg 	if (first) {
   1121  1.26       mrg #ifndef SMALL
   1122   1.7       mrg 		if (vflag)
   1123   1.7       mrg 			printf("method  crc     date  time  ");
   1124  1.26       mrg #endif
   1125   1.7       mrg 		if (qflag == 0)
   1126   1.7       mrg 			printf("  compressed uncompressed  "
   1127   1.7       mrg 			       "ratio uncompressed_name\n");
   1128   1.7       mrg 	}
   1129   1.5       mrg 	first = 0;
   1130   1.5       mrg 
   1131   1.6       mrg 	/* print totals? */
   1132  1.29       mrg #ifndef SMALL
   1133   1.6       mrg 	if (fd == -1) {
   1134   1.6       mrg 		in = in_tot;
   1135   1.6       mrg 		out = out_tot;
   1136  1.29       mrg 	} else
   1137  1.29       mrg #endif
   1138  1.29       mrg 	{
   1139   1.6       mrg 		/* read the last 4 bytes - this is the uncompressed size */
   1140   1.7       mrg 		rv = lseek(fd, (off_t)(-8), SEEK_END);
   1141   1.6       mrg 		if (rv != -1) {
   1142   1.7       mrg 			unsigned char buf[8];
   1143   1.6       mrg 			u_int32_t usize;
   1144   1.6       mrg 
   1145   1.6       mrg 			if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf))
   1146   1.6       mrg 				maybe_err(1, "read of uncompressed size");
   1147   1.7       mrg 			usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24;
   1148   1.6       mrg 			out = (off_t)usize;
   1149  1.29       mrg #ifndef SMALL
   1150  1.29       mrg 			crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24;
   1151  1.29       mrg #endif
   1152   1.6       mrg 		}
   1153   1.6       mrg 	}
   1154   1.5       mrg 
   1155  1.26       mrg #ifndef SMALL
   1156   1.7       mrg 	if (vflag && fd == -1)
   1157   1.7       mrg 		printf("                            ");
   1158   1.7       mrg 	else if (vflag) {
   1159   1.7       mrg 		char *date = ctime(&ts);
   1160   1.7       mrg 
   1161   1.7       mrg 		/* skip the day, 1/100th second, and year */
   1162   1.7       mrg 		date += 4;
   1163   1.7       mrg 		date[12] = 0;
   1164   1.7       mrg 		printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
   1165   1.7       mrg 	}
   1166  1.29       mrg 	in_tot += in;
   1167  1.29       mrg 	out_tot += out;
   1168  1.26       mrg #endif
   1169   1.6       mrg 	printf("%12llu %12llu ", (unsigned long long)in, (unsigned long long)out);
   1170   1.6       mrg 	print_ratio(in, out, stdout);
   1171   1.6       mrg 	printf(" %s\n", outfile);
   1172   1.5       mrg }
   1173   1.5       mrg 
   1174   1.1       mrg /* display the usage of NetBSD gzip */
   1175   1.1       mrg static void
   1176   1.1       mrg usage(void)
   1177   1.1       mrg {
   1178   1.1       mrg 
   1179   1.1       mrg 	fprintf(stderr, "%s\n", gzip_version);
   1180   1.1       mrg 	fprintf(stderr,
   1181  1.29       mrg     "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n"
   1182  1.11       mrg #ifndef SMALL
   1183   1.1       mrg     " -c --stdout          write to stdout, keep original files\n"
   1184   1.1       mrg     "    --to-stdout\n"
   1185   1.1       mrg     " -d --decompress      uncompress files\n"
   1186   1.1       mrg     "    --uncompress\n"
   1187   1.1       mrg     " -f --force           force overwriting & compress links\n"
   1188   1.1       mrg     " -h --help            display this help\n"
   1189   1.1       mrg     " -n --no-name         don't save original file name or time stamp\n"
   1190   1.1       mrg     " -N --name            save or restore original file name and time stamp\n"
   1191   1.1       mrg     " -q --quiet           output no warnings\n"
   1192   1.1       mrg     " -r --recursive       recursively compress files in directories\n"
   1193   1.1       mrg     " -S .suf              use suffix .suf instead of .gz\n"
   1194   1.1       mrg     "    --suffix .suf\n"
   1195   1.1       mrg     " -t --test            test compressed file\n"
   1196   1.1       mrg     " -v --verbose         print extra statistics\n"
   1197   1.1       mrg     " -V --version         display program version\n"
   1198   1.1       mrg     " -1 --fast            fastest (worst) compression\n"
   1199   1.1       mrg     " -2 .. -8             set compression level\n"
   1200   1.1       mrg     " -9 --best            best (slowest) compression\n",
   1201  1.11       mrg #else
   1202  1.11       mrg     ,
   1203  1.11       mrg #endif
   1204   1.1       mrg 	    getprogname());
   1205   1.1       mrg 	exit(0);
   1206   1.1       mrg }
   1207   1.1       mrg 
   1208   1.1       mrg /* display the version of NetBSD gzip */
   1209   1.1       mrg static void
   1210   1.1       mrg display_version(void)
   1211   1.1       mrg {
   1212   1.1       mrg 
   1213   1.1       mrg 	fprintf(stderr, "%s\n", gzip_version);
   1214   1.1       mrg 	exit(0);
   1215   1.1       mrg }
   1216  1.10       mrg 
   1217  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
   1218  1.10       mrg #include "unbzip2.c"
   1219  1.24   tsutsui #endif
   1220  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
   1221  1.22       mrg #include "zuncompress.c"
   1222  1.24   tsutsui #endif
   1223