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gzip.c revision 1.39
      1  1.39       mrg /*	$NetBSD: gzip.c,v 1.39 2004/04/27 01:23:35 mrg Exp $	*/
      2   1.1       mrg 
      3   1.1       mrg /*
      4  1.37       mrg  * Copyright (c) 1997, 1998, 2003, 2004 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  1.37       mrg __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green\n\
     34   1.4       mrg      All rights reserved.\n");
     35  1.39       mrg __RCSID("$NetBSD: gzip.c,v 1.39 2004/04/27 01:23:35 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  * TODO:
     42   1.6       mrg  *	- handle .taz/.tgz files?
     43  1.10       mrg  *	- use mmap where possible
     44  1.16       wiz  *	- handle some signals better (remove outfile?)
     45  1.37       mrg  *	- audit maybe_err()/maybe_warn() usage
     46   1.1       mrg  */
     47   1.1       mrg 
     48   1.1       mrg #include <sys/param.h>
     49   1.1       mrg #include <sys/stat.h>
     50   1.1       mrg #include <sys/time.h>
     51   1.1       mrg 
     52   1.1       mrg #include <unistd.h>
     53   1.1       mrg #include <stdio.h>
     54   1.1       mrg #include <string.h>
     55   1.1       mrg #include <stdlib.h>
     56   1.1       mrg #include <err.h>
     57   1.1       mrg #include <errno.h>
     58   1.1       mrg #include <fcntl.h>
     59   1.1       mrg #include <zlib.h>
     60   1.1       mrg #include <fts.h>
     61   1.1       mrg #include <libgen.h>
     62   1.1       mrg #include <stdarg.h>
     63   1.1       mrg #include <getopt.h>
     64   1.1       mrg 
     65  1.10       mrg /* what type of file are we dealing with */
     66  1.10       mrg enum filetype {
     67  1.10       mrg 	FT_GZIP,
     68  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
     69  1.10       mrg 	FT_BZIP2,
     70  1.24   tsutsui #endif
     71  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
     72  1.22       mrg 	FT_Z,
     73  1.24   tsutsui #endif
     74  1.10       mrg 	FT_LAST,
     75  1.10       mrg 	FT_UNKNOWN
     76  1.10       mrg };
     77  1.10       mrg 
     78  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
     79  1.10       mrg #include <bzlib.h>
     80  1.10       mrg 
     81  1.24   tsutsui #define BZ2_SUFFIX	".bz2"
     82  1.24   tsutsui #define BZIP2_MAGIC	"\102\132\150"
     83  1.24   tsutsui #endif
     84  1.24   tsutsui 
     85  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
     86  1.22       mrg #define Z_SUFFIX	".Z"
     87  1.22       mrg #define Z_MAGIC		"\037\235"
     88  1.24   tsutsui #endif
     89  1.10       mrg 
     90  1.10       mrg #define GZ_SUFFIX	".gz"
     91   1.1       mrg 
     92  1.37       mrg #define BUFLEN		(64 * 1024)
     93   1.1       mrg 
     94   1.9       mrg #define GZIP_MAGIC0	0x1F
     95  1.10       mrg #define GZIP_MAGIC1	0x8B
     96  1.10       mrg #define GZIP_OMAGIC1	0x9E
     97   1.9       mrg 
     98  1.37       mrg #define HEAD_CRC	0x02
     99  1.37       mrg #define EXTRA_FIELD	0x04
    100  1.37       mrg #define ORIG_NAME	0x08
    101  1.37       mrg #define COMMENT		0x10
    102   1.1       mrg 
    103  1.37       mrg #define OS_CODE		3	/* Unix */
    104   1.1       mrg 
    105  1.37       mrg static	const char	gzip_version[] = "NetBSD gzip 20040425";
    106   1.1       mrg 
    107   1.1       mrg static	int	cflag;			/* stdout mode */
    108   1.1       mrg static	int	dflag;			/* decompress mode */
    109  1.25       mrg static	int	lflag;			/* list mode */
    110  1.37       mrg static	int	numflag = 5;		/* gzip -1..-9 value */
    111  1.26       mrg 
    112  1.25       mrg #ifndef SMALL
    113   1.1       mrg static	int	fflag;			/* force mode */
    114   1.1       mrg static	int	nflag;			/* don't save name/timestamp */
    115   1.1       mrg static	int	Nflag;			/* don't restore name/timestamp */
    116   1.1       mrg static	int	qflag;			/* quiet mode */
    117   1.1       mrg static	int	rflag;			/* recursive mode */
    118  1.26       mrg static	int	tflag;			/* test */
    119  1.26       mrg static	char	*Sflag;
    120  1.26       mrg static	int	vflag;			/* verbose mode */
    121  1.25       mrg #else
    122  1.25       mrg #define		qflag	0
    123  1.25       mrg #endif
    124  1.26       mrg 
    125  1.10       mrg static	char	*suffix;
    126  1.10       mrg #define suffix_len	(strlen(suffix) + 1)	/* len + nul */
    127   1.1       mrg static	char	*newfile;		/* name of newly created file */
    128   1.1       mrg static	char	*infile;		/* name of file coming in */
    129   1.1       mrg 
    130   1.1       mrg static	void	maybe_err(int rv, const char *fmt, ...);
    131   1.9       mrg static	void	maybe_errx(int rv, const char *fmt, ...);
    132   1.1       mrg static	void	maybe_warn(const char *fmt, ...);
    133   1.1       mrg static	void	maybe_warnx(const char *fmt, ...);
    134  1.32       mrg static	enum filetype file_gettype(u_char *);
    135  1.37       mrg static	off_t	gz_compress(FILE *, int, off_t *, const char *, time_t);
    136  1.37       mrg static	off_t	gz_uncompress(int, int, char *, size_t, off_t *);
    137  1.31       mrg static	off_t	file_compress(char *);
    138  1.31       mrg static	off_t	file_uncompress(char *);
    139   1.1       mrg static	void	handle_pathname(char *);
    140   1.1       mrg static	void	handle_file(char *, struct stat *);
    141   1.1       mrg static	void	handle_stdin(void);
    142   1.1       mrg static	void	handle_stdout(void);
    143   1.6       mrg static	void	print_ratio(off_t, off_t, FILE *);
    144   1.7       mrg static	void	print_list(int fd, off_t, const char *, time_t);
    145  1.10       mrg static	void	usage(void);
    146  1.10       mrg static	void	display_version(void);
    147  1.26       mrg 
    148  1.26       mrg #ifndef SMALL
    149  1.26       mrg static	void	prepend_gzip(char *, int *, char ***);
    150  1.26       mrg static	void	handle_dir(char *, struct stat *);
    151  1.31       mrg static	void	print_verbage(char *, char *, off_t, off_t);
    152  1.26       mrg static	void	print_test(char *, int);
    153  1.29       mrg static	void	copymodes(const char *, struct stat *);
    154  1.26       mrg #endif
    155  1.26       mrg 
    156  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
    157  1.37       mrg static	off_t	unbzip2(int, int, char *, size_t, off_t *);
    158  1.24   tsutsui #endif
    159  1.26       mrg 
    160  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
    161  1.37       mrg static	FILE 	*zopen(const char *, FILE *);
    162  1.37       mrg static	off_t	zuncompress(FILE *, FILE *, char *, size_t, off_t *);
    163  1.24   tsutsui #endif
    164   1.1       mrg 
    165   1.1       mrg int main(int, char *p[]);
    166   1.1       mrg 
    167  1.11       mrg #ifdef SMALL
    168  1.11       mrg #define getopt_long(a,b,c,d,e) getopt(a,b,c)
    169  1.11       mrg #else
    170   1.3  jdolecek static const struct option longopts[] = {
    171   1.1       mrg 	{ "stdout",		no_argument,		0,	'c' },
    172   1.1       mrg 	{ "to-stdout",		no_argument,		0,	'c' },
    173   1.1       mrg 	{ "decompress",		no_argument,		0,	'd' },
    174   1.1       mrg 	{ "uncompress",		no_argument,		0,	'd' },
    175   1.1       mrg 	{ "force",		no_argument,		0,	'f' },
    176   1.1       mrg 	{ "help",		no_argument,		0,	'h' },
    177   1.5       mrg 	{ "list",		no_argument,		0,	'l' },
    178   1.1       mrg 	{ "no-name",		no_argument,		0,	'n' },
    179   1.1       mrg 	{ "name",		no_argument,		0,	'N' },
    180   1.1       mrg 	{ "quiet",		no_argument,		0,	'q' },
    181   1.1       mrg 	{ "recursive",		no_argument,		0,	'r' },
    182   1.1       mrg 	{ "suffix",		required_argument,	0,	'S' },
    183   1.1       mrg 	{ "test",		no_argument,		0,	't' },
    184   1.1       mrg 	{ "verbose",		no_argument,		0,	'v' },
    185   1.1       mrg 	{ "version",		no_argument,		0,	'V' },
    186   1.1       mrg 	{ "fast",		no_argument,		0,	'1' },
    187   1.1       mrg 	{ "best",		no_argument,		0,	'9' },
    188   1.1       mrg #if 0
    189   1.1       mrg 	/*
    190  1.10       mrg 	 * This is what else GNU gzip implements.  --ascii isn't useful
    191  1.10       mrg 	 * on NetBSD, and I don't care to have a --license.
    192   1.1       mrg 	 */
    193   1.1       mrg 	{ "ascii",		no_argument,		0,	'a' },
    194   1.1       mrg 	{ "license",		no_argument,		0,	'L' },
    195   1.1       mrg #endif
    196  1.12       mrg 	{ NULL,			no_argument,		0,	0 },
    197   1.1       mrg };
    198  1.11       mrg #endif
    199   1.1       mrg 
    200   1.1       mrg int
    201   1.1       mrg main(int argc, char **argv)
    202   1.1       mrg {
    203  1.28       mrg 	const char *progname = getprogname();
    204  1.25       mrg #ifndef SMALL
    205  1.15       mrg 	char *gzip;
    206  1.25       mrg #endif
    207   1.1       mrg 	int ch;
    208   1.1       mrg 
    209  1.15       mrg 	/* XXX set up signals */
    210  1.15       mrg 
    211  1.10       mrg 	suffix = GZ_SUFFIX;;
    212  1.10       mrg 
    213  1.25       mrg #ifndef SMALL
    214  1.15       mrg 	if ((gzip = getenv("GZIP")) != NULL)
    215  1.15       mrg 		prepend_gzip(gzip, &argc, &argv);
    216  1.28       mrg #endif
    217  1.15       mrg 
    218   1.1       mrg 	/*
    219   1.1       mrg 	 * XXX
    220   1.1       mrg 	 * handle being called `gunzip', `zcat' and `gzcat'
    221   1.1       mrg 	 */
    222   1.1       mrg 	if (strcmp(progname, "gunzip") == 0)
    223   1.1       mrg 		dflag = 1;
    224   1.1       mrg 	else if (strcmp(progname, "zcat") == 0 ||
    225   1.1       mrg 		 strcmp(progname, "gzcat") == 0)
    226   1.1       mrg 		dflag = cflag = 1;
    227  1.25       mrg 
    228  1.25       mrg #ifdef SMALL
    229  1.31       mrg #define OPT_LIST "cdhHltV123456789"
    230  1.25       mrg #else
    231  1.28       mrg #define OPT_LIST "cdfhHlnNqrS:tvV123456789"
    232  1.25       mrg #endif
    233   1.1       mrg 
    234  1.28       mrg 	while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1)
    235   1.1       mrg 		switch (ch) {
    236   1.1       mrg 		case 'c':
    237   1.1       mrg 			cflag = 1;
    238   1.1       mrg 			break;
    239   1.1       mrg 		case 'd':
    240   1.1       mrg 			dflag = 1;
    241   1.1       mrg 			break;
    242   1.5       mrg 		case 'l':
    243   1.5       mrg 			lflag = 1;
    244   1.5       mrg 			dflag = 1;
    245   1.5       mrg 			break;
    246  1.26       mrg 		case 'V':
    247  1.26       mrg 			display_version();
    248  1.26       mrg 			/* NOTREACHED */
    249  1.26       mrg 		case '1': case '2': case '3':
    250  1.26       mrg 		case '4': case '5': case '6':
    251  1.26       mrg 		case '7': case '8': case '9':
    252  1.38       mrg 			numflag = ch - '0';
    253  1.26       mrg 			break;
    254  1.25       mrg #ifndef SMALL
    255  1.25       mrg 		case 'f':
    256  1.25       mrg 			fflag = 1;
    257  1.25       mrg 			break;
    258   1.1       mrg 		case 'n':
    259   1.1       mrg 			nflag = 1;
    260   1.1       mrg 			Nflag = 0;
    261   1.1       mrg 			break;
    262   1.1       mrg 		case 'N':
    263   1.1       mrg 			nflag = 0;
    264   1.1       mrg 			Nflag = 1;
    265   1.1       mrg 			break;
    266   1.1       mrg 		case 'q':
    267   1.1       mrg 			qflag = 1;
    268   1.1       mrg 			break;
    269   1.1       mrg 		case 'r':
    270   1.1       mrg 			rflag = 1;
    271   1.1       mrg 			break;
    272   1.1       mrg 		case 'S':
    273   1.1       mrg 			Sflag = optarg;
    274   1.1       mrg 			break;
    275   1.1       mrg 		case 't':
    276   1.1       mrg 			cflag = 1;
    277   1.1       mrg 			tflag = 1;
    278   1.1       mrg 			dflag = 1;
    279   1.1       mrg 			break;
    280   1.1       mrg 		case 'v':
    281   1.1       mrg 			vflag = 1;
    282   1.1       mrg 			break;
    283  1.26       mrg #endif
    284  1.12       mrg 		default:
    285  1.12       mrg 			usage();
    286  1.12       mrg 			/* NOTREACHED */
    287   1.1       mrg 		}
    288   1.1       mrg 	argv += optind;
    289   1.1       mrg 	argc -= optind;
    290   1.1       mrg 
    291   1.1       mrg 	if (argc == 0) {
    292   1.1       mrg 		if (dflag)	/* stdin mode */
    293   1.1       mrg 			handle_stdin();
    294   1.1       mrg 		else		/* stdout mode */
    295   1.1       mrg 			handle_stdout();
    296   1.1       mrg 	} else {
    297   1.1       mrg 		do {
    298   1.1       mrg 			handle_pathname(argv[0]);
    299   1.5       mrg 		} while (*++argv);
    300   1.1       mrg 	}
    301  1.29       mrg #ifndef SMALL
    302   1.6       mrg 	if (qflag == 0 && lflag && argc > 1)
    303   1.7       mrg 		print_list(-1, 0, "(totals)", 0);
    304  1.29       mrg #endif
    305   1.1       mrg 	exit(0);
    306   1.1       mrg }
    307   1.1       mrg 
    308   1.1       mrg /* maybe print a warning */
    309   1.1       mrg void
    310   1.1       mrg maybe_warn(const char *fmt, ...)
    311   1.1       mrg {
    312   1.1       mrg 	va_list ap;
    313   1.1       mrg 
    314   1.1       mrg 	if (qflag == 0) {
    315   1.1       mrg 		va_start(ap, fmt);
    316   1.1       mrg 		vwarn(fmt, ap);
    317   1.1       mrg 		va_end(ap);
    318   1.1       mrg 	}
    319   1.1       mrg }
    320   1.1       mrg 
    321   1.1       mrg void
    322   1.1       mrg maybe_warnx(const char *fmt, ...)
    323   1.1       mrg {
    324   1.1       mrg 	va_list ap;
    325   1.1       mrg 
    326   1.1       mrg 	if (qflag == 0) {
    327   1.1       mrg 		va_start(ap, fmt);
    328   1.1       mrg 		vwarnx(fmt, ap);
    329   1.1       mrg 		va_end(ap);
    330   1.1       mrg 	}
    331   1.1       mrg }
    332   1.1       mrg 
    333   1.1       mrg /* maybe print a warning */
    334   1.1       mrg void
    335   1.1       mrg maybe_err(int rv, const char *fmt, ...)
    336   1.1       mrg {
    337   1.1       mrg 	va_list ap;
    338   1.1       mrg 
    339   1.1       mrg 	if (qflag == 0) {
    340   1.1       mrg 		va_start(ap, fmt);
    341   1.1       mrg 		vwarn(fmt, ap);
    342   1.1       mrg 		va_end(ap);
    343   1.1       mrg 	}
    344   1.1       mrg 	exit(rv);
    345   1.1       mrg }
    346   1.1       mrg 
    347   1.9       mrg /* maybe print a warning */
    348   1.9       mrg void
    349   1.9       mrg maybe_errx(int rv, const char *fmt, ...)
    350   1.9       mrg {
    351   1.9       mrg 	va_list ap;
    352   1.9       mrg 
    353   1.9       mrg 	if (qflag == 0) {
    354   1.9       mrg 		va_start(ap, fmt);
    355   1.9       mrg 		vwarnx(fmt, ap);
    356   1.9       mrg 		va_end(ap);
    357   1.9       mrg 	}
    358   1.9       mrg 	exit(rv);
    359   1.9       mrg }
    360   1.9       mrg 
    361  1.25       mrg #ifndef SMALL
    362  1.15       mrg /* split up $GZIP and prepend it to the argument list */
    363  1.15       mrg static void
    364  1.15       mrg prepend_gzip(char *gzip, int *argc, char ***argv)
    365  1.15       mrg {
    366  1.15       mrg 	char *s, **nargv, **ac;
    367  1.15       mrg 	int nenvarg = 0, i;
    368  1.15       mrg 
    369  1.15       mrg 	/* scan how many arguments there are */
    370  1.15       mrg 	for (s = gzip; *s; s++) {
    371  1.15       mrg 		if (*s == ' ' || *s == '\t')
    372  1.15       mrg 			continue;
    373  1.15       mrg 		nenvarg++;
    374  1.15       mrg 		for (; *s; s++)
    375  1.15       mrg 			if (*s == ' ' || *s == '\t')
    376  1.15       mrg 				break;
    377  1.18       mrg 		if (*s == 0)
    378  1.18       mrg 			break;
    379  1.15       mrg 	}
    380  1.15       mrg 	/* punt early */
    381  1.15       mrg 	if (nenvarg == 0)
    382  1.15       mrg 		return;
    383  1.15       mrg 
    384  1.15       mrg 	*argc += nenvarg;
    385  1.15       mrg 	ac = *argv;
    386  1.15       mrg 
    387  1.17    simonb 	nargv = (char **)malloc((*argc + 1) * sizeof(char *));
    388  1.15       mrg 	if (nargv == NULL)
    389  1.15       mrg 		maybe_err(1, "malloc");
    390  1.15       mrg 
    391  1.15       mrg 	/* stash this away */
    392  1.15       mrg 	*argv = nargv;
    393  1.15       mrg 
    394  1.15       mrg 	/* copy the program name first */
    395  1.15       mrg 	i = 0;
    396  1.15       mrg 	nargv[i++] = *(ac++);
    397  1.15       mrg 
    398  1.15       mrg 	/* take a copy of $GZIP and add it to the array */
    399  1.15       mrg 	s = strdup(gzip);
    400  1.15       mrg 	if (s == NULL)
    401  1.15       mrg 		maybe_err(1, "strdup");
    402  1.15       mrg 	for (; *s; s++) {
    403  1.15       mrg 		if (*s == ' ' || *s == '\t')
    404  1.15       mrg 			continue;
    405  1.15       mrg 		nargv[i++] = s;
    406  1.15       mrg 		for (; *s; s++)
    407  1.15       mrg 			if (*s == ' ' || *s == '\t') {
    408  1.15       mrg 				*s = 0;
    409  1.15       mrg 				break;
    410  1.15       mrg 			}
    411  1.15       mrg 	}
    412  1.15       mrg 
    413  1.15       mrg 	/* copy the original arguments and a NULL */
    414  1.15       mrg 	while (*ac)
    415  1.15       mrg 		nargv[i++] = *(ac++);
    416  1.15       mrg 	nargv[i] = NULL;
    417  1.15       mrg }
    418  1.25       mrg #endif
    419  1.15       mrg 
    420   1.1       mrg /* compress input to output then close both files */
    421  1.37       mrg static off_t
    422  1.37       mrg gz_compress(FILE *in, int out, off_t *gsizep, const char *origname, time_t mtime)
    423   1.1       mrg {
    424  1.37       mrg 	z_stream z;
    425  1.37       mrg 	char inbuf[BUFLEN], outbuf[BUFLEN];
    426  1.37       mrg 	off_t in_tot = 0, out_tot = 0;
    427  1.37       mrg 	ssize_t in_size;
    428  1.37       mrg 	char *str;
    429  1.37       mrg 	int i, error;
    430  1.37       mrg 	uLong crc;
    431  1.37       mrg 
    432  1.37       mrg 	i = asprintf(&str, "%c%c%c%c%c%c%c%c%c%c%s",
    433  1.37       mrg 		     GZIP_MAGIC0, GZIP_MAGIC1,
    434  1.37       mrg 		     Z_DEFLATED, origname ? ORIG_NAME : 0,
    435  1.37       mrg 		     (int)mtime & 0xff,
    436  1.37       mrg 		     (int)(mtime >> 8) & 0xff,
    437  1.37       mrg 		     (int)(mtime >> 16) & 0xff,
    438  1.37       mrg 		     (int)(mtime >> 24) & 0xff,
    439  1.37       mrg 		     0, OS_CODE, origname ? origname : "");
    440  1.37       mrg 	if (i == -1)
    441  1.37       mrg 		maybe_err(1, "asprintf");
    442  1.37       mrg 	if (origname)
    443  1.37       mrg 		i++;
    444  1.37       mrg 	if (write(out, str, i) != i)
    445  1.37       mrg 		maybe_err(1, "write");
    446  1.37       mrg 	free(str);
    447  1.37       mrg 
    448  1.37       mrg 	memset(&z, 0, sizeof z);
    449  1.37       mrg 	z.next_out = outbuf;
    450  1.37       mrg 	z.avail_out = sizeof outbuf;
    451  1.38       mrg 	z.zalloc = Z_NULL;
    452  1.38       mrg 	z.zfree = Z_NULL;
    453  1.37       mrg 	z.opaque = 0;
    454  1.37       mrg 
    455  1.37       mrg 	error = deflateInit2(&z, numflag, Z_DEFLATED,
    456  1.37       mrg 			     -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
    457  1.37       mrg 	if (error != Z_OK)
    458  1.37       mrg 		maybe_errx(1, "deflateInit2 failed");
    459  1.37       mrg 
    460  1.37       mrg 	crc = crc32(0L, Z_NULL, 0);
    461  1.37       mrg 	for (;;) {
    462  1.37       mrg 		if (z.avail_out == 0) {
    463  1.37       mrg 			if (write(out, outbuf, sizeof outbuf) != sizeof outbuf)
    464  1.37       mrg 				maybe_err(1, "write");
    465  1.37       mrg 
    466  1.37       mrg 			out_tot += sizeof outbuf;
    467  1.37       mrg 			z.next_out = outbuf;
    468  1.37       mrg 			z.avail_out = sizeof outbuf;
    469  1.37       mrg 		}
    470  1.37       mrg 
    471  1.37       mrg 		if (z.avail_in == 0) {
    472  1.37       mrg 			in_size = fread(inbuf, 1, sizeof inbuf, in);
    473  1.37       mrg 			if (ferror(in))
    474  1.37       mrg 				maybe_err(1, "fread");
    475  1.37       mrg 			if (in_size == 0)
    476  1.37       mrg 				break;
    477  1.37       mrg 
    478  1.37       mrg 			crc = crc32(crc, (const Bytef *)inbuf, (unsigned)in_size);
    479  1.37       mrg 			in_tot += in_size;
    480  1.37       mrg 			z.next_in = inbuf;
    481  1.37       mrg 			z.avail_in = in_size;
    482  1.37       mrg 		}
    483  1.37       mrg 
    484  1.37       mrg 		error = deflate(&z, Z_NO_FLUSH);
    485  1.37       mrg 		if (error != Z_OK && error != Z_STREAM_END)
    486  1.38       mrg 			maybe_errx(1, "deflate failed");
    487  1.37       mrg 	}
    488   1.1       mrg 
    489  1.37       mrg 	/* clean up */
    490   1.1       mrg 	for (;;) {
    491  1.37       mrg 		size_t len;
    492  1.37       mrg 
    493  1.37       mrg 		error = deflate(&z, Z_FINISH);
    494  1.37       mrg 		if (error != Z_OK && error != Z_STREAM_END)
    495  1.38       mrg 			maybe_errx(1, "deflate failed");
    496  1.37       mrg 
    497  1.37       mrg 		len = sizeof outbuf - z.avail_out;
    498  1.37       mrg 
    499  1.37       mrg 		if (write(out, outbuf, len) != len)
    500  1.37       mrg 			maybe_err(1, "write");
    501  1.37       mrg 		out_tot += len;
    502  1.37       mrg 		z.next_out = outbuf;
    503  1.37       mrg 		z.avail_out = sizeof outbuf;
    504  1.37       mrg 
    505  1.37       mrg 		if (error == Z_STREAM_END)
    506   1.1       mrg 			break;
    507  1.37       mrg 	}
    508  1.37       mrg 
    509  1.37       mrg 	if (deflateEnd(&z) != Z_OK)
    510  1.37       mrg 		maybe_errx(1, "deflateEnd failed");
    511  1.37       mrg 
    512  1.37       mrg 	i = asprintf(&str, "%c%c%c%c%c%c%c%c",
    513  1.37       mrg 		 (int)crc & 0xff,
    514  1.37       mrg 		 (int)(crc >> 8) & 0xff,
    515  1.37       mrg 		 (int)(crc >> 16) & 0xff,
    516  1.37       mrg 		 (int)(crc >> 24) & 0xff,
    517  1.37       mrg 		 (int)in_tot & 0xff,
    518  1.37       mrg 		 (int)(in_tot >> 8) & 0xff,
    519  1.37       mrg 		 (int)(in_tot >> 16) & 0xff,
    520  1.37       mrg 		 (int)(in_tot >> 24) & 0xff);
    521  1.37       mrg 	if (i != 8)
    522  1.37       mrg 		maybe_err(1, "asprintf");
    523  1.37       mrg 	if (write(out, str, i) != i)
    524  1.37       mrg 		maybe_err(1, "write");
    525  1.37       mrg 	free(str);
    526   1.1       mrg 
    527   1.1       mrg 	if (fclose(in) < 0)
    528   1.1       mrg 		maybe_err(1, "failed fclose");
    529  1.37       mrg 
    530  1.37       mrg 	if (gsizep)
    531  1.37       mrg 		*gsizep = out_tot;
    532  1.37       mrg 	return in_tot;
    533   1.1       mrg }
    534   1.1       mrg 
    535  1.37       mrg /*
    536  1.37       mrg  * uncompress input to output then close the input.  return the
    537  1.37       mrg  * uncompressed size written, and put the compressed sized read
    538  1.37       mrg  * into `*gsizep'.
    539  1.37       mrg  */
    540   1.1       mrg static off_t
    541  1.37       mrg gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep)
    542   1.1       mrg {
    543  1.37       mrg 	z_stream z;
    544  1.37       mrg 	char outbuf[BUFLEN], inbuf[BUFLEN];
    545  1.37       mrg 	off_t out_tot, in_tot;
    546  1.37       mrg 	enum {
    547  1.37       mrg 		GZSTATE_MAGIC0,
    548  1.37       mrg 		GZSTATE_MAGIC1,
    549  1.37       mrg 		GZSTATE_METHOD,
    550  1.37       mrg 		GZSTATE_FLAGS,
    551  1.37       mrg 		GZSTATE_SKIPPING,
    552  1.37       mrg 		GZSTATE_EXTRA,
    553  1.37       mrg 		GZSTATE_EXTRA2,
    554  1.37       mrg 		GZSTATE_EXTRA3,
    555  1.37       mrg 		GZSTATE_ORIGNAME,
    556  1.37       mrg 		GZSTATE_COMMENT,
    557  1.37       mrg 		GZSTATE_HEAD_CRC1,
    558  1.37       mrg 		GZSTATE_HEAD_CRC2,
    559  1.37       mrg 		GZSTATE_INIT,
    560  1.37       mrg 		GZSTATE_READ
    561  1.37       mrg 	} state = GZSTATE_MAGIC0;
    562  1.37       mrg 	int flags = 0, skip_count = 0;
    563  1.37       mrg 	int error, done_reading = 0;
    564  1.37       mrg 
    565  1.37       mrg #define ADVANCE()       { z.next_in++; z.avail_in--; }
    566  1.37       mrg 
    567  1.37       mrg 	memset(&z, 0, sizeof z);
    568  1.37       mrg 	z.avail_in = prelen;
    569  1.37       mrg 	z.next_in = pre;
    570  1.37       mrg 	z.avail_out = sizeof outbuf;
    571  1.37       mrg 	z.next_out = outbuf;
    572  1.37       mrg 	z.zalloc = NULL;
    573  1.37       mrg 	z.zfree = NULL;
    574  1.37       mrg 	z.opaque = 0;
    575  1.37       mrg 
    576  1.37       mrg 	in_tot = prelen;
    577  1.37       mrg 	out_tot = 0;
    578   1.1       mrg 
    579  1.37       mrg 	for (;;) {
    580  1.37       mrg 		if (z.avail_in == 0 && done_reading == 0) {
    581  1.37       mrg 			size_t in_size = read(in, inbuf, BUFLEN);
    582   1.1       mrg 
    583  1.37       mrg 			if (in_size == -1) {
    584  1.26       mrg #ifndef SMALL
    585  1.37       mrg 				if (tflag) {
    586  1.37       mrg 					print_test("(stdin)", 0);
    587  1.37       mrg 					return 0;
    588  1.37       mrg 				}
    589  1.37       mrg #endif
    590  1.37       mrg 				maybe_warn("failed to read stdin\n");
    591  1.37       mrg 				return -1;
    592  1.37       mrg 			} else if (in_size == 0)
    593  1.37       mrg 				done_reading = 1;
    594  1.37       mrg 
    595  1.37       mrg 			z.avail_in = in_size;
    596  1.37       mrg 			z.next_in = inbuf;
    597  1.37       mrg 
    598  1.37       mrg 			in_tot += in_size;
    599  1.37       mrg 		}
    600  1.37       mrg 		switch (state) {
    601  1.37       mrg 		case GZSTATE_MAGIC0:
    602  1.37       mrg 			if (*z.next_in != GZIP_MAGIC0)
    603  1.37       mrg 				maybe_err(1, "input not gziped\n");
    604  1.37       mrg 			ADVANCE();
    605  1.37       mrg 			state++;
    606  1.37       mrg 			break;
    607  1.37       mrg 
    608  1.37       mrg 		case GZSTATE_MAGIC1:
    609  1.37       mrg 			if (*z.next_in != GZIP_MAGIC1 &&
    610  1.37       mrg 			    *z.next_in != GZIP_OMAGIC1)
    611  1.37       mrg 				maybe_err(1, "input not gziped\n");
    612  1.37       mrg 			ADVANCE();
    613  1.37       mrg 			state++;
    614  1.37       mrg 			break;
    615  1.37       mrg 
    616  1.37       mrg 		case GZSTATE_METHOD:
    617  1.37       mrg 			if (*z.next_in != Z_DEFLATED)
    618  1.37       mrg 				maybe_err(1, "unknown compression method\n");
    619  1.37       mrg 			ADVANCE();
    620  1.37       mrg 			state++;
    621  1.37       mrg 			break;
    622  1.37       mrg 
    623  1.37       mrg 		case GZSTATE_FLAGS:
    624  1.37       mrg 			flags = *z.next_in;
    625  1.37       mrg 			ADVANCE();
    626  1.37       mrg 			skip_count = 6;
    627  1.37       mrg 			state++;
    628  1.37       mrg 			break;
    629  1.37       mrg 
    630  1.37       mrg 		case GZSTATE_SKIPPING:
    631  1.37       mrg 			if (skip_count > 0) {
    632  1.37       mrg 				skip_count--;
    633  1.37       mrg 				ADVANCE();
    634  1.37       mrg 			} else
    635  1.37       mrg 				state++;
    636  1.37       mrg 			break;
    637  1.37       mrg 
    638  1.37       mrg 		case GZSTATE_EXTRA:
    639  1.37       mrg 			if ((flags & EXTRA_FIELD) == 0) {
    640  1.37       mrg 				state = GZSTATE_ORIGNAME;
    641  1.37       mrg 				break;
    642  1.37       mrg 			}
    643  1.37       mrg 			skip_count = *z.next_in;
    644  1.37       mrg 			ADVANCE();
    645  1.37       mrg 			state++;
    646  1.37       mrg 			break;
    647  1.37       mrg 
    648  1.37       mrg 		case GZSTATE_EXTRA2:
    649  1.37       mrg 			skip_count |= ((*z.next_in) << 8);
    650  1.37       mrg 			ADVANCE();
    651  1.37       mrg 			state++;
    652  1.37       mrg 			break;
    653  1.37       mrg 
    654  1.37       mrg 		case GZSTATE_EXTRA3:
    655  1.37       mrg 			if (skip_count > 0) {
    656  1.37       mrg 				skip_count--;
    657  1.37       mrg 				ADVANCE();
    658   1.1       mrg 			} else
    659  1.37       mrg 				state++;
    660  1.37       mrg 			break;
    661  1.37       mrg 
    662  1.37       mrg 		case GZSTATE_ORIGNAME:
    663  1.37       mrg 			if ((flags & ORIG_NAME) == 0) {
    664  1.37       mrg 				state++;
    665  1.37       mrg 				break;
    666  1.37       mrg 			}
    667  1.37       mrg 			if (*z.next_in == 0)
    668  1.37       mrg 				state++;
    669  1.37       mrg 			ADVANCE();
    670  1.37       mrg 			break;
    671  1.37       mrg 
    672  1.37       mrg 		case GZSTATE_COMMENT:
    673  1.37       mrg 			if ((flags & COMMENT) == 0) {
    674  1.37       mrg 				state++;
    675  1.37       mrg 				break;
    676  1.37       mrg 			}
    677  1.37       mrg 			if (*z.next_in == 0)
    678  1.37       mrg 				state++;
    679  1.37       mrg 			ADVANCE();
    680  1.37       mrg 			break;
    681  1.37       mrg 
    682  1.37       mrg 		case GZSTATE_HEAD_CRC1:
    683  1.37       mrg 			if (flags & HEAD_CRC)
    684  1.37       mrg 				skip_count = 2;
    685  1.37       mrg 			else
    686  1.37       mrg 				skip_count = 0;
    687  1.37       mrg 			state++;
    688  1.37       mrg 			break;
    689  1.37       mrg 
    690  1.37       mrg 		case GZSTATE_HEAD_CRC2:
    691  1.37       mrg 			if (skip_count > 0) {
    692  1.37       mrg 				skip_count--;
    693  1.37       mrg 				ADVANCE();
    694  1.37       mrg 			} else
    695  1.37       mrg 				state++;
    696  1.37       mrg 			break;
    697  1.37       mrg 
    698  1.37       mrg 		case GZSTATE_INIT:
    699  1.37       mrg 			if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
    700  1.37       mrg 				maybe_err(1, "failed to inflateInit\n");
    701  1.37       mrg 				goto stop;
    702  1.37       mrg 			}
    703  1.37       mrg 			state++;
    704  1.37       mrg 			break;
    705  1.37       mrg 
    706  1.37       mrg 		case GZSTATE_READ:
    707  1.37       mrg 			error = inflate(&z, Z_FINISH);
    708  1.37       mrg 			if (error == Z_STREAM_END || error == Z_BUF_ERROR) {
    709  1.37       mrg 				size_t wr = BUFLEN - z.avail_out;
    710  1.37       mrg 
    711  1.37       mrg 				if (
    712  1.37       mrg #ifndef SMALL
    713  1.37       mrg 				    /* don't write anything with -t */
    714  1.37       mrg 				    tflag == 0 &&
    715  1.37       mrg #endif
    716  1.39       mrg 				    write(out, outbuf, wr) != wr)
    717  1.37       mrg 					maybe_err(1, "error writing "
    718  1.39       mrg 						     "to output\n");
    719  1.39       mrg 
    720  1.39       mrg 				out_tot += wr;
    721  1.37       mrg 
    722  1.37       mrg 				if (error == Z_STREAM_END)
    723  1.37       mrg 					goto stop;
    724  1.39       mrg 
    725  1.37       mrg 				z.next_out = outbuf;
    726  1.37       mrg 				z.avail_out = BUFLEN;
    727  1.37       mrg 
    728  1.37       mrg 				break;
    729  1.37       mrg 			}
    730  1.37       mrg 			if (error < 0) {
    731  1.38       mrg 				maybe_warnx("decompression error\n");
    732  1.37       mrg 				out_tot = -1;
    733  1.37       mrg 				goto stop;
    734  1.37       mrg 			}
    735   1.1       mrg 			break;
    736   1.1       mrg 		}
    737  1.37       mrg 		continue;
    738  1.37       mrg stop:
    739  1.37       mrg 		break;
    740  1.37       mrg 	}
    741  1.37       mrg 	if (state > GZSTATE_INIT)
    742  1.37       mrg 		inflateEnd(&z);
    743   1.1       mrg 
    744  1.26       mrg #ifndef SMALL
    745  1.37       mrg 	if (tflag) {
    746  1.37       mrg 		print_test("(stdin)", 1);
    747  1.37       mrg 		return 0;
    748  1.37       mrg 	}
    749  1.26       mrg #endif
    750   1.1       mrg 
    751  1.37       mrg 	if (gsizep)
    752  1.37       mrg 		*gsizep = in_tot;
    753  1.37       mrg 	return (out_tot);
    754   1.1       mrg }
    755   1.1       mrg 
    756  1.29       mrg #ifndef SMALL
    757   1.1       mrg /*
    758   1.1       mrg  * set the owner, mode, flags & utimes for a file
    759   1.1       mrg  */
    760   1.1       mrg static void
    761   1.1       mrg copymodes(const char *file, struct stat *sbp)
    762   1.1       mrg {
    763   1.1       mrg 	struct timeval times[2];
    764   1.1       mrg 
    765   1.1       mrg 	/*
    766   1.1       mrg 	 * If we have no info on the input, give this file some
    767   1.1       mrg 	 * default values and return..
    768   1.1       mrg 	 */
    769   1.1       mrg 	if (sbp == NULL) {
    770   1.1       mrg 		mode_t mask = umask(022);
    771   1.1       mrg 
    772   1.1       mrg 		(void)chmod(file, DEFFILEMODE & ~mask);
    773   1.1       mrg 		(void)umask(mask);
    774   1.1       mrg 		return;
    775   1.1       mrg 	}
    776   1.1       mrg 
    777   1.1       mrg 	/* if the chown fails, remove set-id bits as-per compress(1) */
    778   1.1       mrg 	if (chown(file, sbp->st_uid, sbp->st_gid) < 0) {
    779   1.1       mrg 		if (errno != EPERM)
    780   1.1       mrg 			maybe_warn("couldn't chown: %s", file);
    781   1.1       mrg 		sbp->st_mode &= ~(S_ISUID|S_ISGID);
    782   1.1       mrg 	}
    783   1.1       mrg 
    784   1.1       mrg 	/* we only allow set-id and the 9 normal permission bits */
    785   1.1       mrg 	sbp->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
    786   1.1       mrg 	if (chmod(file, sbp->st_mode) < 0)
    787   1.1       mrg 		maybe_warn("couldn't chmod: %s", file);
    788   1.1       mrg 
    789   1.1       mrg 	/* only try flags if they exist already */
    790   1.1       mrg         if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0)
    791   1.1       mrg 		maybe_warn("couldn't chflags: %s", file);
    792   1.1       mrg 
    793   1.1       mrg 	TIMESPEC_TO_TIMEVAL(&times[0], &sbp->st_atimespec);
    794   1.1       mrg 	TIMESPEC_TO_TIMEVAL(&times[1], &sbp->st_mtimespec);
    795   1.1       mrg 	if (utimes(file, times) < 0)
    796   1.1       mrg 		maybe_warn("couldn't utimes: %s", file);
    797   1.1       mrg }
    798  1.29       mrg #endif
    799   1.1       mrg 
    800  1.32       mrg /* what sort of file is this? */
    801  1.32       mrg static enum filetype
    802  1.32       mrg file_gettype(u_char *buf)
    803  1.32       mrg {
    804  1.32       mrg 
    805  1.32       mrg 	if (buf[0] == GZIP_MAGIC0 &&
    806  1.32       mrg 	    (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
    807  1.32       mrg 		return FT_GZIP;
    808  1.32       mrg 	else
    809  1.32       mrg #ifndef NO_BZIP2_SUPPORT
    810  1.32       mrg 	if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
    811  1.32       mrg 	    buf[3] >= '0' && buf[3] <= '9')
    812  1.32       mrg 		return FT_BZIP2;
    813  1.32       mrg 	else
    814  1.32       mrg #endif
    815  1.32       mrg #ifndef NO_COMPRESS_SUPPORT
    816  1.32       mrg 	if (memcmp(buf, Z_MAGIC, 2) == 0)
    817  1.32       mrg 		return FT_Z;
    818  1.32       mrg 	else
    819  1.32       mrg #endif
    820  1.32       mrg 		return FT_UNKNOWN;
    821  1.32       mrg }
    822  1.32       mrg 
    823   1.1       mrg /*
    824   1.1       mrg  * compress the given file: create a corresponding .gz file and remove the
    825   1.1       mrg  * original.
    826   1.1       mrg  */
    827  1.31       mrg static off_t
    828   1.1       mrg file_compress(char *file)
    829   1.1       mrg {
    830   1.1       mrg 	FILE *in;
    831  1.37       mrg 	int out;
    832   1.1       mrg 	struct stat isb, osb;
    833   1.5       mrg 	char outfile[MAXPATHLEN];
    834  1.31       mrg 	off_t size;
    835  1.25       mrg #ifndef SMALL
    836   1.1       mrg 	u_int32_t mtime = 0;
    837  1.37       mrg 	char *savename;
    838  1.25       mrg #endif
    839   1.1       mrg 
    840   1.1       mrg 	if (cflag == 0) {
    841   1.1       mrg 		(void)strncpy(outfile, file, MAXPATHLEN - suffix_len);
    842   1.1       mrg 		outfile[MAXPATHLEN - suffix_len] = '\0';
    843  1.10       mrg 		(void)strlcat(outfile, suffix, sizeof(outfile));
    844   1.1       mrg 
    845  1.25       mrg #ifndef SMALL
    846   1.1       mrg 		if (fflag == 0) {
    847   1.1       mrg 			if (stat(outfile, &osb) == 0) {
    848   1.1       mrg 				maybe_warnx("%s already exists -- skipping",
    849   1.1       mrg 					      outfile);
    850   1.1       mrg 				goto lose;
    851   1.1       mrg 			}
    852   1.1       mrg 		}
    853   1.1       mrg 		if (stat(file, &isb) == 0) {
    854  1.33      tron 			if (isb.st_nlink > 1 && fflag == 0) {
    855   1.1       mrg 				maybe_warnx("%s has %d other link%s -- "
    856  1.33      tron 					    "skipping", file, isb.st_nlink - 1,
    857   1.1       mrg 					    isb.st_nlink == 1 ? "" : "s");
    858   1.1       mrg 				goto lose;
    859   1.1       mrg 			}
    860   1.1       mrg 			if (nflag == 0)
    861   1.1       mrg 				mtime = (u_int32_t)isb.st_mtime;
    862  1.34       mrg 		}
    863  1.25       mrg #endif
    864   1.1       mrg 	}
    865   1.1       mrg 	in = fopen(file, "r");
    866   1.1       mrg 	if (in == 0)
    867   1.1       mrg 		maybe_err(1, "can't fopen %s", file);
    868   1.1       mrg 
    869   1.1       mrg 	if (cflag == 0) {
    870  1.37       mrg #ifndef SMALL
    871   1.1       mrg 		if (nflag == 0)
    872   1.1       mrg 			savename = basename(file);
    873   1.1       mrg 		else
    874   1.1       mrg 			savename = NULL;
    875   1.1       mrg #endif
    876  1.37       mrg 		out = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
    877  1.39       mrg 		if (out == -1) {
    878  1.39       mrg 			maybe_warn("could not create output: %s", outfile);
    879  1.39       mrg 			goto lose;
    880  1.39       mrg 		}
    881   1.1       mrg 	} else
    882  1.37       mrg 		out = STDOUT_FILENO;
    883   1.1       mrg 
    884  1.37       mrg #ifdef SMALL
    885  1.37       mrg 	gz_compress(in, out, NULL, NULL, 0);
    886  1.37       mrg #else
    887  1.37       mrg 	gz_compress(in, out, NULL, savename, mtime);
    888  1.37       mrg #endif
    889   1.1       mrg 
    890   1.1       mrg 	/*
    891   1.1       mrg 	 * if we compressed to stdout, we don't know the size and
    892   1.1       mrg 	 * we don't know the new file name, punt.  if we can't stat
    893   1.1       mrg 	 * the file, whine, otherwise set the size from the stat
    894   1.1       mrg 	 * buffer.  we only blow away the file if we can stat the
    895   1.1       mrg 	 * output, just in case.
    896   1.1       mrg 	 */
    897   1.1       mrg 	if (cflag == 0) {
    898  1.39       mrg 		if (close(out) == -1)
    899  1.39       mrg 			maybe_warn("couldn't close ouput");
    900  1.39       mrg 
    901   1.1       mrg 		if (stat(outfile, &osb) < 0) {
    902   1.1       mrg 			maybe_warn("couldn't stat: %s", outfile);
    903   1.1       mrg 			maybe_warnx("leaving original %s", file);
    904   1.1       mrg 			size = 0;
    905   1.1       mrg 		} else {
    906   1.1       mrg 			unlink(file);
    907   1.1       mrg 			size = osb.st_size;
    908   1.1       mrg 		}
    909   1.1       mrg 		newfile = outfile;
    910  1.29       mrg #ifndef SMALL
    911   1.1       mrg 		copymodes(outfile, &isb);
    912  1.29       mrg #endif
    913   1.1       mrg 	} else {
    914   1.1       mrg lose:
    915   1.1       mrg 		size = 0;
    916   1.1       mrg 		newfile = 0;
    917   1.1       mrg 	}
    918   1.1       mrg 
    919   1.1       mrg 	return (size);
    920   1.1       mrg }
    921   1.1       mrg 
    922   1.1       mrg /* uncompress the given file and remove the original */
    923  1.31       mrg static off_t
    924   1.1       mrg file_uncompress(char *file)
    925   1.1       mrg {
    926   1.1       mrg 	struct stat isb, osb;
    927   1.5       mrg 	char buf[PATH_MAX];
    928   1.1       mrg 	char *outfile = buf, *s;
    929   1.1       mrg 	off_t size;
    930   1.1       mrg 	ssize_t len = strlen(file);
    931   1.9       mrg 	int fd;
    932  1.37       mrg 	unsigned char header1[4], name[PATH_MAX + 1];
    933  1.10       mrg 	enum filetype method;
    934   1.9       mrg 
    935   1.9       mrg 	/* gather the old name info */
    936   1.1       mrg 
    937   1.9       mrg 	fd = open(file, O_RDONLY);
    938   1.9       mrg 	if (fd < 0)
    939   1.9       mrg 		maybe_err(1, "can't open %s", file);
    940  1.37       mrg 	if (read(fd, header1, sizeof header1) != sizeof header1) {
    941  1.10       mrg 		/* we don't want to fail here. */
    942  1.25       mrg #ifndef SMALL
    943  1.10       mrg 		if (fflag)
    944  1.10       mrg 			goto close_it;
    945  1.25       mrg #endif
    946   1.9       mrg 		maybe_err(1, "can't read %s", file);
    947  1.10       mrg 	}
    948  1.10       mrg 
    949  1.32       mrg 	method = file_gettype(header1);
    950  1.29       mrg 
    951  1.32       mrg #ifndef SMALL
    952  1.32       mrg 	if (Sflag == NULL) {
    953  1.32       mrg # ifndef NO_BZIP2_SUPPORT
    954  1.32       mrg 		if (method == FT_BZIP2)
    955  1.10       mrg 			suffix = BZ2_SUFFIX;
    956  1.32       mrg 		else
    957  1.26       mrg # endif
    958  1.32       mrg # ifndef NO_COMPRESS_SUPPORT
    959  1.32       mrg 		if (method == FT_Z)
    960  1.22       mrg 			suffix = Z_SUFFIX;
    961  1.26       mrg # endif
    962  1.32       mrg 	}
    963   1.9       mrg 
    964  1.10       mrg 	if (fflag == 0 && method == FT_UNKNOWN)
    965   1.9       mrg 		maybe_errx(1, "%s: not in gzip format", file);
    966  1.25       mrg #endif
    967   1.9       mrg 
    968  1.10       mrg 	if (cflag == 0 || lflag) {
    969  1.10       mrg 		s = &file[len - suffix_len + 1];
    970  1.10       mrg 		if (strncmp(s, suffix, suffix_len) == 0) {
    971  1.10       mrg 			(void)strncpy(outfile, file, len - suffix_len + 1);
    972  1.10       mrg 			outfile[len - suffix_len + 1] = '\0';
    973  1.10       mrg 		} else if (lflag == 0)
    974  1.10       mrg 			maybe_errx(1, "unknown suffix %s", s);
    975  1.10       mrg 	}
    976  1.10       mrg 
    977  1.25       mrg #ifdef SMALL
    978  1.25       mrg 	if (method == FT_GZIP && lflag)
    979  1.25       mrg #else
    980  1.25       mrg 	if (method == FT_GZIP && (Nflag || lflag))
    981  1.25       mrg #endif
    982  1.25       mrg 	{
    983   1.9       mrg 		if (header1[3] & ORIG_NAME) {
    984   1.9       mrg 			size_t rbytes;
    985   1.9       mrg 			int i;
    986   1.9       mrg 
    987   1.9       mrg 			rbytes = read(fd, name, PATH_MAX + 1);
    988   1.9       mrg 			if (rbytes < 0)
    989   1.1       mrg 				maybe_err(1, "can't read %s", file);
    990   1.9       mrg 			for (i = 0; i < rbytes && name[i]; i++)
    991   1.9       mrg 				;
    992   1.9       mrg 			if (i < rbytes) {
    993   1.9       mrg 				name[i] = 0;
    994   1.9       mrg 				/* now maybe merge old dirname */
    995   1.9       mrg 				if (strchr(outfile, '/') == 0)
    996   1.9       mrg 					outfile = name;
    997   1.9       mrg 				else {
    998   1.9       mrg 					char *dir = dirname(outfile);
    999   1.9       mrg 					if (asprintf(&outfile, "%s/%s", dir,
   1000   1.9       mrg 					    name) == -1)
   1001   1.9       mrg 						maybe_err(1, "malloc");
   1002   1.1       mrg 				}
   1003   1.1       mrg 			}
   1004   1.1       mrg 		}
   1005   1.9       mrg 	}
   1006  1.25       mrg #ifndef SMALL
   1007  1.10       mrg close_it:
   1008  1.25       mrg #endif
   1009   1.9       mrg 	close(fd);
   1010   1.1       mrg 
   1011  1.31       mrg 	if (cflag == 0 || lflag) {
   1012  1.25       mrg #ifndef SMALL
   1013  1.31       mrg 		if (fflag == 0 && lflag == 0 && stat(outfile, &osb) == 0) {
   1014   1.9       mrg 			maybe_warnx("%s already exists -- skipping", outfile);
   1015   1.9       mrg 			goto lose;
   1016   1.9       mrg 		}
   1017  1.31       mrg #endif
   1018   1.9       mrg 		if (stat(file, &isb) == 0) {
   1019  1.31       mrg #ifndef SMALL
   1020  1.33      tron 			if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
   1021   1.9       mrg 				maybe_warnx("%s has %d other links -- skipping",
   1022   1.9       mrg 				    file, isb.st_nlink - 1);
   1023   1.1       mrg 				goto lose;
   1024   1.1       mrg 			}
   1025  1.31       mrg #endif
   1026   1.9       mrg 		} else
   1027   1.9       mrg 			goto lose;
   1028   1.1       mrg 	}
   1029   1.5       mrg 
   1030  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
   1031  1.10       mrg 	if (method == FT_BZIP2) {
   1032  1.10       mrg 		int in, out;
   1033   1.5       mrg 
   1034  1.30       mrg 		/* XXX */
   1035  1.26       mrg 		if (lflag)
   1036  1.26       mrg 			maybe_errx(1, "no -l with bzip2 files");
   1037  1.26       mrg 
   1038  1.10       mrg 		if ((in = open(file, O_RDONLY)) == -1)
   1039  1.10       mrg 			maybe_err(1, "open for read: %s", file);
   1040  1.10       mrg 		if (cflag == 1)
   1041  1.10       mrg 			out = STDOUT_FILENO;
   1042  1.10       mrg 		else
   1043  1.10       mrg 			out = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
   1044  1.10       mrg 		if (out == -1)
   1045  1.10       mrg 			maybe_err(1, "open for write: %s", outfile);
   1046   1.5       mrg 
   1047  1.37       mrg 		if ((size = unbzip2(in, out, NULL, 0, NULL)) == 0) {
   1048  1.36       mrg 			if (cflag == 0)
   1049  1.36       mrg 				unlink(outfile);
   1050  1.10       mrg 			goto lose;
   1051  1.10       mrg 		}
   1052  1.24   tsutsui 	} else
   1053  1.24   tsutsui #endif
   1054  1.29       mrg 
   1055  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
   1056  1.24   tsutsui 	if (method == FT_Z) {
   1057  1.22       mrg 		FILE *in, *out;
   1058  1.22       mrg 		int fd;
   1059  1.22       mrg 
   1060  1.30       mrg 		/* XXX */
   1061  1.26       mrg 		if (lflag)
   1062  1.26       mrg 			maybe_errx(1, "no -l with Lempel-Ziv files");
   1063  1.26       mrg 
   1064  1.37       mrg 		if ((in = zopen(file, NULL)) == NULL)
   1065  1.22       mrg 			maybe_err(1, "open for read: %s", file);
   1066  1.22       mrg 
   1067  1.22       mrg 		if (cflag == 1)
   1068  1.22       mrg 			fd = STDOUT_FILENO;
   1069  1.22       mrg 		else {
   1070  1.22       mrg 			fd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
   1071  1.22       mrg 			if (fd == -1)
   1072  1.22       mrg 				maybe_err(1, "open for write: %s", outfile);
   1073  1.22       mrg 		}
   1074  1.22       mrg 		out = fdopen(fd, "w");
   1075  1.22       mrg 		if (out == NULL)
   1076  1.22       mrg 			maybe_err(1, "open for write: %s", outfile);
   1077  1.22       mrg 
   1078  1.37       mrg 		size = zuncompress(in, out, NULL, 0, NULL);
   1079  1.36       mrg 		if (cflag == 0) {
   1080  1.36       mrg 			if (size == 0) {
   1081  1.36       mrg 				unlink(outfile);
   1082  1.36       mrg 				goto lose;
   1083  1.36       mrg 			}
   1084  1.36       mrg 			if (ferror(in) || fclose(in)) {
   1085  1.36       mrg 				unlink(outfile);
   1086  1.36       mrg 				maybe_err(1, "failed infile fclose");
   1087  1.36       mrg 			}
   1088  1.36       mrg 			if (fclose(out)) {
   1089  1.36       mrg 				unlink(outfile);
   1090  1.36       mrg 				maybe_err(1, "failed outfile close");
   1091  1.36       mrg 			}
   1092  1.22       mrg 		}
   1093  1.24   tsutsui 	} else
   1094  1.24   tsutsui #endif
   1095  1.24   tsutsui 	{
   1096  1.37       mrg 		int fd, in;
   1097  1.37       mrg 
   1098  1.10       mrg 		if (lflag) {
   1099  1.10       mrg 			if ((fd = open(file, O_RDONLY)) == -1)
   1100  1.10       mrg 				maybe_err(1, "open");
   1101  1.10       mrg 			print_list(fd, isb.st_size, outfile, isb.st_mtime);
   1102  1.10       mrg 			return 0;	/* XXX */
   1103  1.10       mrg 		}
   1104  1.10       mrg 
   1105  1.37       mrg 		in = open(file, O_RDONLY);
   1106  1.37       mrg 		if (in == -1)
   1107  1.37       mrg 			maybe_err(1, "can't open %s", file);
   1108  1.10       mrg 
   1109  1.10       mrg 		if (cflag == 0) {
   1110  1.10       mrg 			/* Use open(2) directly to get a safe file.  */
   1111  1.10       mrg 			fd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
   1112  1.10       mrg 			if (fd < 0)
   1113  1.10       mrg 				maybe_err(1, "can't open %s", outfile);
   1114  1.10       mrg 		} else
   1115  1.37       mrg 			fd = STDOUT_FILENO;
   1116   1.1       mrg 
   1117  1.37       mrg 		size = gz_uncompress(in, fd, NULL, 0, NULL);
   1118  1.36       mrg 		if (cflag == 0) {
   1119  1.37       mrg 			if (size == -1) {
   1120  1.36       mrg 				unlink(outfile);
   1121  1.36       mrg 				goto lose;
   1122  1.36       mrg 			}
   1123  1.37       mrg 			if (close(fd))
   1124  1.37       mrg 				maybe_err(1, "failed close");
   1125  1.10       mrg 		}
   1126  1.10       mrg 	}
   1127   1.1       mrg 
   1128   1.1       mrg 	/* if testing, or we uncompressed to stdout, this is all we need */
   1129  1.26       mrg #ifndef SMALL
   1130  1.26       mrg 	if (tflag)
   1131  1.26       mrg 		return (size);
   1132  1.26       mrg #endif
   1133  1.26       mrg 	if (cflag)
   1134   1.1       mrg 		return (size);
   1135   1.1       mrg 
   1136   1.1       mrg 	/*
   1137   1.1       mrg 	 * if we create a file...
   1138   1.1       mrg 	 */
   1139   1.1       mrg 	if (cflag == 0) {
   1140   1.1       mrg 		/*
   1141   1.1       mrg 		 * if we can't stat the file, or we are uncompressing to
   1142   1.1       mrg 		 * stdin, don't remove the file.
   1143   1.1       mrg 		 */
   1144   1.1       mrg 		if (stat(outfile, &osb) < 0) {
   1145   1.1       mrg 			maybe_warn("couldn't stat (leaving original): %s",
   1146   1.1       mrg 				   outfile);
   1147   1.1       mrg 			goto lose;
   1148   1.1       mrg 		}
   1149   1.1       mrg 		if (osb.st_size != size) {
   1150   1.1       mrg 			maybe_warn("stat gave different size: %llu != %llu "
   1151   1.1       mrg 			    "(leaving original)",
   1152   1.1       mrg 			    (unsigned long long)size,
   1153   1.1       mrg 			    (unsigned long long)osb.st_size);
   1154   1.1       mrg 			goto lose;
   1155   1.1       mrg 		}
   1156   1.1       mrg 		newfile = outfile;
   1157  1.36       mrg 		if (cflag == 0)
   1158  1.36       mrg 			unlink(file);
   1159   1.1       mrg 		size = osb.st_size;
   1160  1.29       mrg #ifndef SMALL
   1161   1.1       mrg 		copymodes(outfile, &isb);
   1162  1.29       mrg #endif
   1163   1.1       mrg 	}
   1164   1.1       mrg 	return (size);
   1165   1.1       mrg 
   1166   1.1       mrg lose:
   1167   1.1       mrg 	newfile = 0;
   1168  1.22       mrg 	return 0;
   1169   1.1       mrg }
   1170   1.1       mrg 
   1171  1.37       mrg #ifndef SMALL
   1172  1.37       mrg static off_t
   1173  1.37       mrg cat_stdin(unsigned char * prepend, size_t count, off_t *gsizep)
   1174  1.37       mrg {
   1175  1.37       mrg 	char buf[BUFLEN];
   1176  1.37       mrg 	size_t rv;
   1177  1.37       mrg 	off_t in_tot;
   1178  1.37       mrg 
   1179  1.37       mrg 	in_tot = count;
   1180  1.37       mrg 	if (write(STDOUT_FILENO, prepend, count) != count)
   1181  1.37       mrg 		maybe_err(1, "write to stdout");
   1182  1.37       mrg 	for (;;) {
   1183  1.37       mrg 		rv = read(STDIN_FILENO, buf, sizeof buf);
   1184  1.37       mrg 
   1185  1.37       mrg 		if (write(STDOUT_FILENO, buf, rv) != rv)
   1186  1.37       mrg 			maybe_err(1, "write to stdout");
   1187  1.37       mrg 		in_tot += rv;
   1188  1.37       mrg 	}
   1189  1.37       mrg 
   1190  1.37       mrg 	if (gsizep)
   1191  1.37       mrg 		*gsizep = in_tot;
   1192  1.37       mrg 	return (in_tot);
   1193  1.37       mrg }
   1194  1.37       mrg #endif
   1195  1.37       mrg 
   1196   1.1       mrg static void
   1197   1.1       mrg handle_stdin(void)
   1198   1.1       mrg {
   1199  1.37       mrg 	unsigned char header1[4];
   1200  1.37       mrg 	off_t usize, gsize;
   1201  1.37       mrg 	enum filetype method;
   1202  1.37       mrg #ifndef NO_COMPRESS_SUPPORT
   1203  1.37       mrg 	FILE *in;
   1204  1.37       mrg #endif
   1205   1.1       mrg 
   1206  1.25       mrg #ifndef SMALL
   1207   1.5       mrg 	if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
   1208   1.1       mrg 		maybe_warnx("standard input is a terminal -- ignoring");
   1209   1.1       mrg 		return;
   1210   1.1       mrg 	}
   1211  1.25       mrg #endif
   1212   1.5       mrg 
   1213   1.5       mrg 	if (lflag) {
   1214   1.5       mrg 		struct stat isb;
   1215   1.5       mrg 
   1216  1.37       mrg 		/* XXX could read the whole file, etc. */
   1217   1.5       mrg 		if (fstat(STDIN_FILENO, &isb) < 0)
   1218   1.5       mrg 			maybe_err(1, "fstat");
   1219   1.7       mrg 		print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
   1220   1.5       mrg 		return;
   1221   1.5       mrg 	}
   1222   1.5       mrg 
   1223  1.37       mrg 	if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1)
   1224  1.37       mrg 		maybe_err(1, "can't read stdin");
   1225  1.37       mrg 
   1226  1.37       mrg 	method = file_gettype(header1);
   1227  1.37       mrg 	switch (method) {
   1228  1.37       mrg 	default:
   1229  1.37       mrg #ifndef SMALL
   1230  1.37       mrg 		if (fflag == 0)
   1231  1.37       mrg 			maybe_errx(1, "unknown compression format");
   1232  1.37       mrg 		usize = cat_stdin(header1, sizeof header1, &gsize);
   1233  1.37       mrg 		break;
   1234  1.37       mrg #endif
   1235  1.37       mrg 	case FT_GZIP:
   1236  1.37       mrg 		usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
   1237  1.37       mrg 			      header1, sizeof header1, &gsize);
   1238  1.37       mrg 		break;
   1239  1.37       mrg #ifndef NO_BZIP2_SUPPORT
   1240  1.37       mrg 	case FT_BZIP2:
   1241  1.37       mrg 		usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
   1242  1.37       mrg 				header1, sizeof header1, &gsize);
   1243  1.37       mrg 		break;
   1244  1.37       mrg #endif
   1245  1.37       mrg #ifndef NO_COMPRESS_SUPPORT
   1246  1.37       mrg 	case FT_Z:
   1247  1.37       mrg 		if ((in = zopen(NULL, stdin)) == NULL)
   1248  1.37       mrg 			maybe_err(1, "zopen of stdin");
   1249  1.37       mrg 
   1250  1.37       mrg 		usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
   1251  1.37       mrg 		break;
   1252  1.37       mrg #endif
   1253  1.37       mrg 	}
   1254  1.37       mrg 
   1255  1.37       mrg #ifndef SMALL
   1256  1.37       mrg         if (vflag && !tflag && usize != -1 && gsize != -1)
   1257  1.37       mrg 		print_verbage(NULL, 0, usize, gsize);
   1258  1.37       mrg #endif
   1259  1.37       mrg 
   1260   1.1       mrg }
   1261   1.1       mrg 
   1262   1.1       mrg static void
   1263   1.1       mrg handle_stdout(void)
   1264   1.1       mrg {
   1265  1.37       mrg 	off_t gsize, usize;
   1266   1.1       mrg 
   1267  1.25       mrg #ifndef SMALL
   1268   1.1       mrg 	if (fflag == 0 && isatty(STDOUT_FILENO)) {
   1269   1.1       mrg 		maybe_warnx("standard output is a terminal -- ignoring");
   1270   1.1       mrg 		return;
   1271   1.1       mrg 	}
   1272  1.25       mrg #endif
   1273  1.37       mrg 	usize = gz_compress(stdin, STDOUT_FILENO, &gsize, NULL, 0);
   1274  1.37       mrg 
   1275  1.37       mrg #ifndef SMALL
   1276  1.37       mrg         if (vflag && !tflag && usize != -1 && gsize != -1)
   1277  1.37       mrg 		print_verbage(NULL, 0, usize, gsize);
   1278  1.37       mrg #endif
   1279   1.1       mrg }
   1280   1.1       mrg 
   1281   1.1       mrg /* do what is asked for, for the path name */
   1282   1.1       mrg static void
   1283   1.1       mrg handle_pathname(char *path)
   1284   1.1       mrg {
   1285   1.1       mrg 	char *opath = path, *s = 0;
   1286   1.1       mrg 	ssize_t len;
   1287   1.1       mrg 	struct stat sb;
   1288   1.1       mrg 
   1289   1.1       mrg 	/* check for stdout/stdin */
   1290   1.1       mrg 	if (path[0] == '-' && path[1] == '\0') {
   1291   1.1       mrg 		if (dflag)
   1292   1.1       mrg 			handle_stdin();
   1293   1.1       mrg 		else
   1294   1.1       mrg 			handle_stdout();
   1295   1.1       mrg 	}
   1296   1.1       mrg 
   1297   1.1       mrg retry:
   1298   1.1       mrg 	if (stat(path, &sb) < 0) {
   1299   1.1       mrg 		/* lets try <path>.gz if we're decompressing */
   1300   1.1       mrg 		if (dflag && s == 0 && errno == ENOENT) {
   1301   1.1       mrg 			len = strlen(path);
   1302   1.1       mrg 			s = malloc(len + suffix_len);
   1303   1.1       mrg 			if (s == 0)
   1304   1.1       mrg 				maybe_err(1, "malloc");
   1305   1.1       mrg 			memmove(s, path, len);
   1306  1.10       mrg 			memmove(&s[len], suffix, suffix_len);
   1307   1.1       mrg 			path = s;
   1308   1.1       mrg 			goto retry;
   1309   1.1       mrg 		}
   1310   1.1       mrg 		maybe_warn("can't stat: %s", opath);
   1311   1.1       mrg 		goto out;
   1312   1.1       mrg 	}
   1313   1.1       mrg 
   1314   1.1       mrg 	if (S_ISDIR(sb.st_mode)) {
   1315  1.25       mrg #ifndef SMALL
   1316   1.1       mrg 		if (rflag)
   1317   1.1       mrg 			handle_dir(path, &sb);
   1318   1.1       mrg 		else
   1319  1.25       mrg #endif
   1320   1.1       mrg 			maybe_warn("%s is a directory", path);
   1321   1.1       mrg 		goto out;
   1322   1.1       mrg 	}
   1323   1.1       mrg 
   1324   1.1       mrg 	if (S_ISREG(sb.st_mode))
   1325   1.1       mrg 		handle_file(path, &sb);
   1326   1.1       mrg 
   1327   1.1       mrg out:
   1328   1.1       mrg 	if (s)
   1329   1.1       mrg 		free(s);
   1330   1.1       mrg }
   1331   1.1       mrg 
   1332   1.1       mrg /* compress/decompress a file */
   1333   1.1       mrg static void
   1334   1.1       mrg handle_file(char *file, struct stat *sbp)
   1335   1.1       mrg {
   1336  1.31       mrg 	off_t usize, gsize;
   1337   1.1       mrg 
   1338   1.1       mrg 	infile = file;
   1339   1.1       mrg 	if (dflag) {
   1340   1.1       mrg 		usize = file_uncompress(file);
   1341   1.1       mrg 		if (usize == 0)
   1342   1.1       mrg 			return;
   1343   1.1       mrg 		gsize = sbp->st_size;
   1344   1.1       mrg 	} else {
   1345   1.1       mrg 		gsize = file_compress(file);
   1346   1.1       mrg 		if (gsize == 0)
   1347   1.1       mrg 			return;
   1348   1.1       mrg 		usize = sbp->st_size;
   1349   1.1       mrg 	}
   1350   1.1       mrg 
   1351  1.26       mrg 
   1352  1.26       mrg #ifndef SMALL
   1353   1.1       mrg 	if (vflag && !tflag)
   1354   1.1       mrg 		print_verbage(file, cflag == 0 ? newfile : 0, usize, gsize);
   1355  1.26       mrg #endif
   1356   1.1       mrg }
   1357   1.1       mrg 
   1358  1.25       mrg #ifndef SMALL
   1359   1.1       mrg /* this is used with -r to recursively decend directories */
   1360   1.1       mrg static void
   1361   1.1       mrg handle_dir(char *dir, struct stat *sbp)
   1362   1.1       mrg {
   1363   1.1       mrg 	char *path_argv[2];
   1364   1.1       mrg 	FTS *fts;
   1365   1.1       mrg 	FTSENT *entry;
   1366   1.1       mrg 
   1367   1.1       mrg 	path_argv[0] = dir;
   1368   1.1       mrg 	path_argv[1] = 0;
   1369   1.1       mrg 	fts = fts_open(path_argv, FTS_PHYSICAL, NULL);
   1370   1.1       mrg 	if (fts == NULL) {
   1371   1.1       mrg 		warn("couldn't fts_open %s", dir);
   1372   1.1       mrg 		return;
   1373   1.1       mrg 	}
   1374   1.1       mrg 
   1375   1.1       mrg 	while ((entry = fts_read(fts))) {
   1376   1.1       mrg 		switch(entry->fts_info) {
   1377   1.1       mrg 		case FTS_D:
   1378   1.1       mrg 		case FTS_DP:
   1379   1.1       mrg 			continue;
   1380   1.1       mrg 
   1381   1.1       mrg 		case FTS_DNR:
   1382   1.1       mrg 		case FTS_ERR:
   1383   1.1       mrg 		case FTS_NS:
   1384   1.1       mrg 			maybe_warn("%s", entry->fts_path);
   1385   1.1       mrg 			continue;
   1386   1.1       mrg 		case FTS_F:
   1387   1.1       mrg 			handle_file(entry->fts_name, entry->fts_statp);
   1388   1.1       mrg 		}
   1389   1.1       mrg 	}
   1390   1.1       mrg 	(void)fts_close(fts);
   1391   1.1       mrg }
   1392  1.25       mrg #endif
   1393   1.1       mrg 
   1394   1.6       mrg /* print a ratio */
   1395   1.6       mrg static void
   1396   1.6       mrg print_ratio(off_t in, off_t out, FILE *where)
   1397   1.6       mrg {
   1398  1.35       mrg 	int64_t percent10;	/* 10 * percent */
   1399  1.35       mrg 	off_t diff = in - out;
   1400  1.35       mrg 	char ch;
   1401   1.6       mrg 
   1402  1.35       mrg 	if (in == 0)
   1403  1.35       mrg 		percent10 = 0;
   1404  1.35       mrg 	else if (diff > 0x400000) 	/* anything with 22 or more bits */
   1405  1.35       mrg 		percent10 = diff / (in / 1000);
   1406  1.35       mrg 	else
   1407  1.35       mrg 		percent10 = (1000 * diff) / in;
   1408  1.35       mrg 
   1409  1.35       mrg 	if (percent10 < 0) {
   1410  1.35       mrg 		percent10 = -percent10;
   1411  1.35       mrg 		ch = '-';
   1412  1.35       mrg 	} else
   1413  1.35       mrg 		ch = ' ';
   1414  1.35       mrg 
   1415  1.35       mrg 	/*
   1416  1.35       mrg 	 * ugh.  for negative percentages < 10, we need to avoid printing a
   1417  1.35       mrg 	 * a space between the "-" and the single number.
   1418  1.35       mrg 	 */
   1419  1.35       mrg 	if (ch == '-' && percent10 / 10LL < 10)
   1420  1.35       mrg 		fprintf(where, " -%1d.%1u%%", (unsigned)(percent10 / 10LL),
   1421  1.35       mrg 					      (unsigned)(percent10 % 10LL));
   1422   1.6       mrg 	else
   1423  1.35       mrg 		fprintf(where, "%c%2d.%1u%%", ch, (unsigned)(percent10 / 10LL),
   1424  1.35       mrg 					          (unsigned)(percent10 % 10LL));
   1425   1.6       mrg }
   1426   1.6       mrg 
   1427  1.26       mrg #ifndef SMALL
   1428   1.1       mrg /* print compression statistics, and the new name (if there is one!) */
   1429   1.1       mrg static void
   1430  1.31       mrg print_verbage(char *file, char *nfile, off_t usize, off_t gsize)
   1431   1.1       mrg {
   1432  1.37       mrg 	if (file)
   1433  1.37       mrg 		fprintf(stderr, "%s:%s  ", file,
   1434  1.37       mrg 		    strlen(file) < 7 ? "\t\t" : "\t");
   1435  1.31       mrg 	print_ratio((off_t)usize, (off_t)gsize, stderr);
   1436   1.4       mrg 	if (nfile)
   1437   1.4       mrg 		fprintf(stderr, " -- replaced with %s", nfile);
   1438   1.1       mrg 	fprintf(stderr, "\n");
   1439   1.1       mrg 	fflush(stderr);
   1440   1.1       mrg }
   1441   1.1       mrg 
   1442   1.1       mrg /* print test results */
   1443   1.1       mrg static void
   1444   1.1       mrg print_test(char *file, int ok)
   1445   1.1       mrg {
   1446   1.1       mrg 
   1447   1.1       mrg 	fprintf(stderr, "%s:%s  %s\n", file,
   1448   1.1       mrg 	    strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
   1449   1.1       mrg 	fflush(stderr);
   1450   1.1       mrg }
   1451  1.26       mrg #endif
   1452   1.1       mrg 
   1453   1.5       mrg /* print a file's info ala --list */
   1454   1.5       mrg /* eg:
   1455   1.5       mrg   compressed uncompressed  ratio uncompressed_name
   1456   1.5       mrg       354841      1679360  78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
   1457   1.5       mrg */
   1458   1.5       mrg static void
   1459  1.35       mrg print_list(int fd, off_t out, const char *outfile, time_t ts)
   1460   1.5       mrg {
   1461   1.5       mrg 	static int first = 1;
   1462  1.29       mrg #ifndef SMALL
   1463   1.6       mrg 	static off_t in_tot, out_tot;
   1464  1.29       mrg 	u_int32_t crc;
   1465  1.29       mrg #endif
   1466  1.35       mrg 	off_t in;
   1467   1.5       mrg 	int rv;
   1468   1.5       mrg 
   1469   1.7       mrg 	if (first) {
   1470  1.26       mrg #ifndef SMALL
   1471   1.7       mrg 		if (vflag)
   1472   1.7       mrg 			printf("method  crc     date  time  ");
   1473  1.26       mrg #endif
   1474   1.7       mrg 		if (qflag == 0)
   1475   1.7       mrg 			printf("  compressed uncompressed  "
   1476   1.7       mrg 			       "ratio uncompressed_name\n");
   1477   1.7       mrg 	}
   1478   1.5       mrg 	first = 0;
   1479   1.5       mrg 
   1480   1.6       mrg 	/* print totals? */
   1481  1.29       mrg #ifndef SMALL
   1482   1.6       mrg 	if (fd == -1) {
   1483   1.6       mrg 		in = in_tot;
   1484   1.6       mrg 		out = out_tot;
   1485  1.29       mrg 	} else
   1486  1.29       mrg #endif
   1487  1.29       mrg 	{
   1488   1.6       mrg 		/* read the last 4 bytes - this is the uncompressed size */
   1489   1.7       mrg 		rv = lseek(fd, (off_t)(-8), SEEK_END);
   1490   1.6       mrg 		if (rv != -1) {
   1491   1.7       mrg 			unsigned char buf[8];
   1492   1.6       mrg 			u_int32_t usize;
   1493   1.6       mrg 
   1494   1.6       mrg 			if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf))
   1495  1.37       mrg 				maybe_warn("read of uncompressed size");
   1496   1.7       mrg 			usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24;
   1497  1.35       mrg 			in = (off_t)usize;
   1498  1.29       mrg #ifndef SMALL
   1499  1.29       mrg 			crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24;
   1500  1.29       mrg #endif
   1501   1.6       mrg 		}
   1502   1.6       mrg 	}
   1503   1.5       mrg 
   1504  1.26       mrg #ifndef SMALL
   1505   1.7       mrg 	if (vflag && fd == -1)
   1506   1.7       mrg 		printf("                            ");
   1507   1.7       mrg 	else if (vflag) {
   1508   1.7       mrg 		char *date = ctime(&ts);
   1509   1.7       mrg 
   1510   1.7       mrg 		/* skip the day, 1/100th second, and year */
   1511   1.7       mrg 		date += 4;
   1512   1.7       mrg 		date[12] = 0;
   1513   1.7       mrg 		printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
   1514   1.7       mrg 	}
   1515  1.29       mrg 	in_tot += in;
   1516  1.29       mrg 	out_tot += out;
   1517  1.26       mrg #endif
   1518  1.35       mrg 	printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
   1519   1.6       mrg 	print_ratio(in, out, stdout);
   1520   1.6       mrg 	printf(" %s\n", outfile);
   1521   1.5       mrg }
   1522   1.5       mrg 
   1523   1.1       mrg /* display the usage of NetBSD gzip */
   1524   1.1       mrg static void
   1525   1.1       mrg usage(void)
   1526   1.1       mrg {
   1527   1.1       mrg 
   1528   1.1       mrg 	fprintf(stderr, "%s\n", gzip_version);
   1529   1.1       mrg 	fprintf(stderr,
   1530  1.29       mrg     "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n"
   1531  1.11       mrg #ifndef SMALL
   1532   1.1       mrg     " -c --stdout          write to stdout, keep original files\n"
   1533   1.1       mrg     "    --to-stdout\n"
   1534   1.1       mrg     " -d --decompress      uncompress files\n"
   1535   1.1       mrg     "    --uncompress\n"
   1536   1.1       mrg     " -f --force           force overwriting & compress links\n"
   1537   1.1       mrg     " -h --help            display this help\n"
   1538   1.1       mrg     " -n --no-name         don't save original file name or time stamp\n"
   1539   1.1       mrg     " -N --name            save or restore original file name and time stamp\n"
   1540   1.1       mrg     " -q --quiet           output no warnings\n"
   1541   1.1       mrg     " -r --recursive       recursively compress files in directories\n"
   1542   1.1       mrg     " -S .suf              use suffix .suf instead of .gz\n"
   1543   1.1       mrg     "    --suffix .suf\n"
   1544   1.1       mrg     " -t --test            test compressed file\n"
   1545   1.1       mrg     " -v --verbose         print extra statistics\n"
   1546   1.1       mrg     " -V --version         display program version\n"
   1547   1.1       mrg     " -1 --fast            fastest (worst) compression\n"
   1548   1.1       mrg     " -2 .. -8             set compression level\n"
   1549   1.1       mrg     " -9 --best            best (slowest) compression\n",
   1550  1.11       mrg #else
   1551  1.11       mrg     ,
   1552  1.11       mrg #endif
   1553   1.1       mrg 	    getprogname());
   1554   1.1       mrg 	exit(0);
   1555   1.1       mrg }
   1556   1.1       mrg 
   1557   1.1       mrg /* display the version of NetBSD gzip */
   1558   1.1       mrg static void
   1559   1.1       mrg display_version(void)
   1560   1.1       mrg {
   1561   1.1       mrg 
   1562   1.1       mrg 	fprintf(stderr, "%s\n", gzip_version);
   1563   1.1       mrg 	exit(0);
   1564   1.1       mrg }
   1565  1.10       mrg 
   1566  1.24   tsutsui #ifndef NO_BZIP2_SUPPORT
   1567  1.10       mrg #include "unbzip2.c"
   1568  1.24   tsutsui #endif
   1569  1.24   tsutsui #ifndef NO_COMPRESS_SUPPORT
   1570  1.22       mrg #include "zuncompress.c"
   1571  1.24   tsutsui #endif
   1572