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freebsd-src/usr.bin/gzip/gzip.c
Warner Losh 0b8224d1cc Remove copyright strings ifdef'd out 
We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by:		Netflix
2023-11-26 22:23:58 -07:00

2262 lines
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/* $NetBSD: gzip.c,v 1.116 2018/10/27 11:39:12 skrll Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008, 2009, 2010, 2011, 2015, 2017
* Matthew R. Green
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* gzip.c -- GPL free gzip using zlib.
*
* RFC 1950 covers the zlib format
* RFC 1951 covers the deflate format
* RFC 1952 covers the gzip format
*
* TODO:
* - use mmap where possible
* - make bzip2/compress -v/-t/-l support work as well as possible
*/
#include <sys/endian.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <inttypes.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <zlib.h>
#include <fts.h>
#include <libgen.h>
#include <stdarg.h>
#include <getopt.h>
#include <time.h>
/* what type of file are we dealing with */
enum filetype {
FT_GZIP,
#ifndef NO_BZIP2_SUPPORT
FT_BZIP2,
#endif
#ifndef NO_COMPRESS_SUPPORT
FT_Z,
#endif
#ifndef NO_PACK_SUPPORT
FT_PACK,
#endif
#ifndef NO_XZ_SUPPORT
FT_XZ,
#endif
#ifndef NO_LZ_SUPPORT
FT_LZ,
#endif
#ifndef NO_ZSTD_SUPPORT
FT_ZSTD,
#endif
FT_LAST,
FT_UNKNOWN
};
#ifndef NO_BZIP2_SUPPORT
#include <bzlib.h>
#define BZ2_SUFFIX ".bz2"
#define BZIP2_MAGIC "BZh"
#endif
#ifndef NO_COMPRESS_SUPPORT
#define Z_SUFFIX ".Z"
#define Z_MAGIC "\037\235"
#endif
#ifndef NO_PACK_SUPPORT
#define PACK_MAGIC "\037\036"
#endif
#ifndef NO_XZ_SUPPORT
#include <lzma.h>
#define XZ_SUFFIX ".xz"
#define XZ_MAGIC "\3757zXZ"
#endif
#ifndef NO_LZ_SUPPORT
#define LZ_SUFFIX ".lz"
#define LZ_MAGIC "LZIP"
#endif
#ifndef NO_ZSTD_SUPPORT
#include <zstd.h>
#define ZSTD_SUFFIX ".zst"
#define ZSTD_MAGIC "\050\265\057\375"
#endif
#define GZ_SUFFIX ".gz"
#define BUFLEN (64 * 1024)
#define GZIP_MAGIC0 0x1F
#define GZIP_MAGIC1 0x8B
#define GZIP_OMAGIC1 0x9E
#define GZIP_TIMESTAMP (off_t)4
#define GZIP_ORIGNAME (off_t)10
#define HEAD_CRC 0x02
#define EXTRA_FIELD 0x04
#define ORIG_NAME 0x08
#define COMMENT 0x10
#define OS_CODE 3 /* Unix */
typedef struct {
const char *zipped;
int ziplen;
const char *normal; /* for unzip - must not be longer than zipped */
} suffixes_t;
static suffixes_t suffixes[] = {
#define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
SUFFIX(GZ_SUFFIX, ""),
SUFFIX(".z", ""),
SUFFIX("-gz", ""),
SUFFIX("-z", ""),
SUFFIX("_z", ""),
SUFFIX(".taz", ".tar"),
SUFFIX(".tgz", ".tar"),
#ifndef NO_BZIP2_SUPPORT
SUFFIX(BZ2_SUFFIX, ""),
SUFFIX(".tbz", ".tar"),
SUFFIX(".tbz2", ".tar"),
#endif
#ifndef NO_COMPRESS_SUPPORT
SUFFIX(Z_SUFFIX, ""),
#endif
#ifndef NO_XZ_SUPPORT
SUFFIX(XZ_SUFFIX, ""),
#endif
#ifndef NO_LZ_SUPPORT
SUFFIX(LZ_SUFFIX, ""),
#endif
#ifndef NO_ZSTD_SUPPORT
SUFFIX(ZSTD_SUFFIX, ""),
#endif
SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
#undef SUFFIX
};
#define NUM_SUFFIXES (nitems(suffixes))
#define SUFFIX_MAXLEN 30
static const char gzip_version[] = "FreeBSD gzip 20190107";
static const char gzip_copyright[] = \
" Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n"
" All rights reserved.\n"
"\n"
" Redistribution and use in source and binary forms, with or without\n"
" modification, are permitted provided that the following conditions\n"
" are met:\n"
" 1. Redistributions of source code must retain the above copyright\n"
" notice, this list of conditions and the following disclaimer.\n"
" 2. Redistributions in binary form must reproduce the above copyright\n"
" notice, this list of conditions and the following disclaimer in the\n"
" documentation and/or other materials provided with the distribution.\n"
"\n"
" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n"
" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n"
" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n"
" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n"
" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n"
" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n"
" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n"
" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n"
" SUCH DAMAGE.";
static int cflag; /* stdout mode */
static int dflag; /* decompress mode */
static int lflag; /* list mode */
static int numflag = 6; /* gzip -1..-9 value */
static const char *remove_file = NULL; /* file to be removed upon SIGINT */
static int fflag; /* force mode */
static int kflag; /* don't delete input files */
static int nflag; /* don't save name/timestamp */
static int Nflag; /* don't restore name/timestamp */
static int qflag; /* quiet mode */
static int rflag; /* recursive mode */
static int tflag; /* test */
static int vflag; /* verbose mode */
static sig_atomic_t print_info = 0;
static int exit_value = 0; /* exit value */
static const char *infile; /* name of file coming in */
static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2;
#if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
!defined(NO_XZ_SUPPORT) || !defined(NO_ZSTD_SUPPORT)
static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2;
#endif
static void maybe_warn(const char *fmt, ...) __printflike(1, 2);
static void maybe_warnx(const char *fmt, ...) __printflike(1, 2);
static enum filetype file_gettype(u_char *);
static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
static off_t file_compress(char *, char *, size_t);
static off_t file_uncompress(char *, char *, size_t);
static void handle_pathname(char *);
static void handle_file(char *, struct stat *);
static void handle_stdin(void);
static void handle_stdout(void);
static void print_ratio(off_t, off_t, FILE *);
static void print_list(int fd, off_t, const char *, time_t);
static void usage(void) __dead2;
static void display_version(void) __dead2;
static void display_license(void);
static const suffixes_t *check_suffix(char *, int);
static ssize_t read_retry(int, void *, size_t);
static ssize_t write_retry(int, const void *, size_t);
static void print_list_out(off_t, off_t, const char*);
static void infile_set(const char *newinfile, off_t total);
static off_t infile_total; /* total expected to read/write */
static off_t infile_current; /* current read/write */
static void check_siginfo(void);
static off_t cat_fd(unsigned char *, size_t, off_t *, int fd);
static void prepend_gzip(char *, int *, char ***);
static void handle_dir(char *);
static void print_verbage(const char *, const char *, off_t, off_t);
static void print_test(const char *, int);
static void copymodes(int fd, const struct stat *, const char *file);
static int check_outfile(const char *outfile);
static void setup_signals(void);
static void infile_newdata(size_t newdata);
static void infile_clear(void);
#ifndef NO_BZIP2_SUPPORT
static off_t unbzip2(int, int, char *, size_t, off_t *);
#endif
#ifndef NO_COMPRESS_SUPPORT
static FILE *zdopen(int);
static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
#endif
#ifndef NO_PACK_SUPPORT
static off_t unpack(int, int, char *, size_t, off_t *);
#endif
#ifndef NO_XZ_SUPPORT
static off_t unxz(int, int, char *, size_t, off_t *);
static off_t unxz_len(int);
#endif
#ifndef NO_LZ_SUPPORT
static off_t unlz(int, int, char *, size_t, off_t *);
#endif
#ifndef NO_ZSTD_SUPPORT
static off_t unzstd(int, int, char *, size_t, off_t *);
#endif
static const struct option longopts[] = {
{ "stdout", no_argument, 0, 'c' },
{ "to-stdout", no_argument, 0, 'c' },
{ "decompress", no_argument, 0, 'd' },
{ "uncompress", no_argument, 0, 'd' },
{ "force", no_argument, 0, 'f' },
{ "help", no_argument, 0, 'h' },
{ "keep", no_argument, 0, 'k' },
{ "list", no_argument, 0, 'l' },
{ "no-name", no_argument, 0, 'n' },
{ "name", no_argument, 0, 'N' },
{ "quiet", no_argument, 0, 'q' },
{ "recursive", no_argument, 0, 'r' },
{ "suffix", required_argument, 0, 'S' },
{ "test", no_argument, 0, 't' },
{ "verbose", no_argument, 0, 'v' },
{ "version", no_argument, 0, 'V' },
{ "fast", no_argument, 0, '1' },
{ "best", no_argument, 0, '9' },
{ "ascii", no_argument, 0, 'a' },
{ "license", no_argument, 0, 'L' },
{ NULL, no_argument, 0, 0 },
};
int
main(int argc, char **argv)
{
const char *progname = getprogname();
char *gzip;
int len;
int ch;
setup_signals();
if ((gzip = getenv("GZIP")) != NULL)
prepend_gzip(gzip, &argc, &argv);
/*
* XXX
* handle being called `gunzip', `zcat' and `gzcat'
*/
if (strcmp(progname, "gunzip") == 0)
dflag = 1;
else if (strcmp(progname, "zcat") == 0 ||
strcmp(progname, "gzcat") == 0)
dflag = cflag = 1;
#define OPT_LIST "123456789acdfhklLNnqrS:tVv"
while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
switch (ch) {
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
numflag = ch - '0';
break;
case 'c':
cflag = 1;
break;
case 'd':
dflag = 1;
break;
case 'l':
lflag = 1;
dflag = 1;
break;
case 'V':
display_version();
/* NOTREACHED */
case 'a':
fprintf(stderr, "%s: option --ascii ignored on this system\n", progname);
break;
case 'f':
fflag = 1;
break;
case 'k':
kflag = 1;
break;
case 'L':
display_license();
/* NOT REACHED */
case 'N':
nflag = 0;
Nflag = 1;
break;
case 'n':
nflag = 1;
Nflag = 0;
break;
case 'q':
qflag = 1;
break;
case 'r':
rflag = 1;
break;
case 'S':
len = strlen(optarg);
if (len != 0) {
if (len > SUFFIX_MAXLEN)
errx(1, "incorrect suffix: '%s': too long", optarg);
suffixes[0].zipped = optarg;
suffixes[0].ziplen = len;
} else {
suffixes[NUM_SUFFIXES - 1].zipped = "";
suffixes[NUM_SUFFIXES - 1].ziplen = 0;
}
break;
case 't':
cflag = 1;
tflag = 1;
dflag = 1;
break;
case 'v':
vflag = 1;
break;
default:
usage();
/* NOTREACHED */
}
}
argv += optind;
argc -= optind;
if (argc == 0) {
if (dflag) /* stdin mode */
handle_stdin();
else /* stdout mode */
handle_stdout();
} else {
do {
handle_pathname(argv[0]);
} while (*++argv);
}
if (qflag == 0 && lflag && argc > 1)
print_list(-1, 0, "(totals)", 0);
exit(exit_value);
}
/* maybe print a warning */
void
maybe_warn(const char *fmt, ...)
{
va_list ap;
if (qflag == 0) {
va_start(ap, fmt);
vwarn(fmt, ap);
va_end(ap);
}
if (exit_value == 0)
exit_value = 1;
}
/* ... without an errno. */
void
maybe_warnx(const char *fmt, ...)
{
va_list ap;
if (qflag == 0) {
va_start(ap, fmt);
vwarnx(fmt, ap);
va_end(ap);
}
if (exit_value == 0)
exit_value = 1;
}
/* maybe print an error */
void
maybe_err(const char *fmt, ...)
{
va_list ap;
if (qflag == 0) {
va_start(ap, fmt);
vwarn(fmt, ap);
va_end(ap);
}
exit(2);
}
#if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
!defined(NO_XZ_SUPPORT) || !defined(NO_ZSTD_SUPPORT)
/* ... without an errno. */
void
maybe_errx(const char *fmt, ...)
{
va_list ap;
if (qflag == 0) {
va_start(ap, fmt);
vwarnx(fmt, ap);
va_end(ap);
}
exit(2);
}
#endif
/* split up $GZIP and prepend it to the argument list */
static void
prepend_gzip(char *gzip, int *argc, char ***argv)
{
char *s, **nargv, **ac;
int nenvarg = 0, i;
/* scan how many arguments there are */
for (s = gzip;;) {
while (*s == ' ' || *s == '\t')
s++;
if (*s == 0)
goto count_done;
nenvarg++;
while (*s != ' ' && *s != '\t')
if (*s++ == 0)
goto count_done;
}
count_done:
/* punt early */
if (nenvarg == 0)
return;
*argc += nenvarg;
ac = *argv;
nargv = (char **)malloc((*argc + 1) * sizeof(char *));
if (nargv == NULL)
maybe_err("malloc");
/* stash this away */
*argv = nargv;
/* copy the program name first */
i = 0;
nargv[i++] = *(ac++);
/* take a copy of $GZIP and add it to the array */
s = strdup(gzip);
if (s == NULL)
maybe_err("strdup");
for (;;) {
/* Skip whitespaces. */
while (*s == ' ' || *s == '\t')
s++;
if (*s == 0)
goto copy_done;
nargv[i++] = s;
/* Find the end of this argument. */
while (*s != ' ' && *s != '\t')
if (*s++ == 0)
/* Argument followed by NUL. */
goto copy_done;
/* Terminate by overwriting ' ' or '\t' with NUL. */
*s++ = 0;
}
copy_done:
/* copy the original arguments and a NULL */
while (*ac)
nargv[i++] = *(ac++);
nargv[i] = NULL;
}
/* compress input to output. Return bytes read, -1 on error */
static off_t
gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
{
z_stream z;
char *outbufp, *inbufp;
off_t in_tot = 0, out_tot = 0;
ssize_t in_size;
int i, error;
uLong crc;
outbufp = malloc(BUFLEN);
inbufp = malloc(BUFLEN);
if (outbufp == NULL || inbufp == NULL) {
maybe_err("malloc failed");
goto out;
}
memset(&z, 0, sizeof z);
z.zalloc = Z_NULL;
z.zfree = Z_NULL;
z.opaque = 0;
if (nflag != 0) {
mtime = 0;
origname = "";
}
i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
*origname ? ORIG_NAME : 0,
mtime & 0xff,
(mtime >> 8) & 0xff,
(mtime >> 16) & 0xff,
(mtime >> 24) & 0xff,
numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
OS_CODE, origname);
if (i >= BUFLEN)
/* this need PATH_MAX > BUFLEN ... */
maybe_err("snprintf");
if (*origname)
i++;
z.next_out = (unsigned char *)outbufp + i;
z.avail_out = BUFLEN - i;
error = deflateInit2(&z, numflag, Z_DEFLATED,
(-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
if (error != Z_OK) {
maybe_warnx("deflateInit2 failed");
in_tot = -1;
goto out;
}
crc = crc32(0L, Z_NULL, 0);
for (;;) {
if (z.avail_out == 0) {
if (write_retry(out, outbufp, BUFLEN) != BUFLEN) {
maybe_warn("write");
out_tot = -1;
goto out;
}
out_tot += BUFLEN;
z.next_out = (unsigned char *)outbufp;
z.avail_out = BUFLEN;
}
if (z.avail_in == 0) {
in_size = read(in, inbufp, BUFLEN);
if (in_size < 0) {
maybe_warn("read");
in_tot = -1;
goto out;
}
if (in_size == 0)
break;
infile_newdata(in_size);
crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
in_tot += in_size;
z.next_in = (unsigned char *)inbufp;
z.avail_in = in_size;
}
error = deflate(&z, Z_NO_FLUSH);
if (error != Z_OK && error != Z_STREAM_END) {
maybe_warnx("deflate failed");
in_tot = -1;
goto out;
}
}
/* clean up */
for (;;) {
size_t len;
ssize_t w;
error = deflate(&z, Z_FINISH);
if (error != Z_OK && error != Z_STREAM_END) {
maybe_warnx("deflate failed");
in_tot = -1;
goto out;
}
len = (char *)z.next_out - outbufp;
w = write_retry(out, outbufp, len);
if (w == -1 || (size_t)w != len) {
maybe_warn("write");
out_tot = -1;
goto out;
}
out_tot += len;
z.next_out = (unsigned char *)outbufp;
z.avail_out = BUFLEN;
if (error == Z_STREAM_END)
break;
}
if (deflateEnd(&z) != Z_OK) {
maybe_warnx("deflateEnd failed");
in_tot = -1;
goto out;
}
i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
(int)crc & 0xff,
(int)(crc >> 8) & 0xff,
(int)(crc >> 16) & 0xff,
(int)(crc >> 24) & 0xff,
(int)in_tot & 0xff,
(int)(in_tot >> 8) & 0xff,
(int)(in_tot >> 16) & 0xff,
(int)(in_tot >> 24) & 0xff);
if (i != 8)
maybe_err("snprintf");
if (write_retry(out, outbufp, i) != i) {
maybe_warn("write");
in_tot = -1;
} else
out_tot += i;
out:
if (inbufp != NULL)
free(inbufp);
if (outbufp != NULL)
free(outbufp);
if (gsizep)
*gsizep = out_tot;
return in_tot;
}
/*
* uncompress input to output then close the input. return the
* uncompressed size written, and put the compressed sized read
* into `*gsizep'.
*/
static off_t
gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
const char *filename)
{
z_stream z;
char *outbufp, *inbufp;
off_t out_tot = -1, in_tot = 0;
uint32_t out_sub_tot = 0;
enum {
GZSTATE_MAGIC0,
GZSTATE_MAGIC1,
GZSTATE_METHOD,
GZSTATE_FLAGS,
GZSTATE_SKIPPING,
GZSTATE_EXTRA,
GZSTATE_EXTRA2,
GZSTATE_EXTRA3,
GZSTATE_ORIGNAME,
GZSTATE_COMMENT,
GZSTATE_HEAD_CRC1,
GZSTATE_HEAD_CRC2,
GZSTATE_INIT,
GZSTATE_READ,
GZSTATE_CRC,
GZSTATE_LEN,
} state = GZSTATE_MAGIC0;
int flags = 0, skip_count = 0;
int error = Z_STREAM_ERROR, done_reading = 0;
uLong crc = 0;
ssize_t wr;
int needmore = 0;
#define ADVANCE() { z.next_in++; z.avail_in--; }
if ((outbufp = malloc(BUFLEN)) == NULL) {
maybe_err("malloc failed");
goto out2;
}
if ((inbufp = malloc(BUFLEN)) == NULL) {
maybe_err("malloc failed");
goto out1;
}
memset(&z, 0, sizeof z);
z.avail_in = prelen;
z.next_in = (unsigned char *)pre;
z.avail_out = BUFLEN;
z.next_out = (unsigned char *)outbufp;
z.zalloc = NULL;
z.zfree = NULL;
z.opaque = 0;
in_tot = prelen;
out_tot = 0;
for (;;) {
check_siginfo();
if ((z.avail_in == 0 || needmore) && done_reading == 0) {
ssize_t in_size;
if (z.avail_in > 0) {
memmove(inbufp, z.next_in, z.avail_in);
}
z.next_in = (unsigned char *)inbufp;
in_size = read(in, z.next_in + z.avail_in,
BUFLEN - z.avail_in);
if (in_size == -1) {
maybe_warn("failed to read stdin");
goto stop_and_fail;
} else if (in_size == 0) {
done_reading = 1;
}
infile_newdata(in_size);
z.avail_in += in_size;
needmore = 0;
in_tot += in_size;
}
if (z.avail_in == 0) {
if (done_reading && state != GZSTATE_MAGIC0) {
maybe_warnx("%s: unexpected end of file",
filename);
goto stop_and_fail;
}
goto stop;
}
switch (state) {
case GZSTATE_MAGIC0:
if (*z.next_in != GZIP_MAGIC0) {
if (in_tot > 0) {
maybe_warnx("%s: trailing garbage "
"ignored", filename);
exit_value = 2;
goto stop;
}
maybe_warnx("input not gziped (MAGIC0)");
goto stop_and_fail;
}
ADVANCE();
state++;
out_sub_tot = 0;
crc = crc32(0L, Z_NULL, 0);
break;
case GZSTATE_MAGIC1:
if (*z.next_in != GZIP_MAGIC1 &&
*z.next_in != GZIP_OMAGIC1) {
maybe_warnx("input not gziped (MAGIC1)");
goto stop_and_fail;
}
ADVANCE();
state++;
break;
case GZSTATE_METHOD:
if (*z.next_in != Z_DEFLATED) {
maybe_warnx("unknown compression method");
goto stop_and_fail;
}
ADVANCE();
state++;
break;
case GZSTATE_FLAGS:
flags = *z.next_in;
ADVANCE();
skip_count = 6;
state++;
break;
case GZSTATE_SKIPPING:
if (skip_count > 0) {
skip_count--;
ADVANCE();
} else
state++;
break;
case GZSTATE_EXTRA:
if ((flags & EXTRA_FIELD) == 0) {
state = GZSTATE_ORIGNAME;
break;
}
skip_count = *z.next_in;
ADVANCE();
state++;
break;
case GZSTATE_EXTRA2:
skip_count |= ((*z.next_in) << 8);
ADVANCE();
state++;
break;
case GZSTATE_EXTRA3:
if (skip_count > 0) {
skip_count--;
ADVANCE();
} else
state++;
break;
case GZSTATE_ORIGNAME:
if ((flags & ORIG_NAME) == 0) {
state++;
break;
}
if (*z.next_in == 0)
state++;
ADVANCE();
break;
case GZSTATE_COMMENT:
if ((flags & COMMENT) == 0) {
state++;
break;
}
if (*z.next_in == 0)
state++;
ADVANCE();
break;
case GZSTATE_HEAD_CRC1:
if (flags & HEAD_CRC)
skip_count = 2;
else
skip_count = 0;
state++;
break;
case GZSTATE_HEAD_CRC2:
if (skip_count > 0) {
skip_count--;
ADVANCE();
} else
state++;
break;
case GZSTATE_INIT:
if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
maybe_warnx("failed to inflateInit");
goto stop_and_fail;
}
state++;
break;
case GZSTATE_READ:
error = inflate(&z, Z_FINISH);
switch (error) {
/* Z_BUF_ERROR goes with Z_FINISH... */
case Z_BUF_ERROR:
if (z.avail_out > 0 && !done_reading)
continue;
case Z_STREAM_END:
case Z_OK:
break;
case Z_NEED_DICT:
maybe_warnx("Z_NEED_DICT error");
goto stop_and_fail;
case Z_DATA_ERROR:
maybe_warnx("data stream error");
goto stop_and_fail;
case Z_STREAM_ERROR:
maybe_warnx("internal stream error");
goto stop_and_fail;
case Z_MEM_ERROR:
maybe_warnx("memory allocation error");
goto stop_and_fail;
default:
maybe_warn("unknown error from inflate(): %d",
error);
}
wr = BUFLEN - z.avail_out;
if (wr != 0) {
crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
if (
/* don't write anything with -t */
tflag == 0 &&
write_retry(out, outbufp, wr) != wr) {
maybe_warn("error writing to output");
goto stop_and_fail;
}
out_tot += wr;
out_sub_tot += wr;
}
if (error == Z_STREAM_END) {
inflateEnd(&z);
state++;
}
z.next_out = (unsigned char *)outbufp;
z.avail_out = BUFLEN;
break;
case GZSTATE_CRC:
{
uLong origcrc;
if (z.avail_in < 4) {
if (!done_reading) {
needmore = 1;
continue;
}
maybe_warnx("truncated input");
goto stop_and_fail;
}
origcrc = le32dec(&z.next_in[0]);
if (origcrc != crc) {
maybe_warnx("invalid compressed"
" data--crc error");
goto stop_and_fail;
}
}
z.avail_in -= 4;
z.next_in += 4;
if (!z.avail_in && done_reading) {
goto stop;
}
state++;
break;
case GZSTATE_LEN:
{
uLong origlen;
if (z.avail_in < 4) {
if (!done_reading) {
needmore = 1;
continue;
}
maybe_warnx("truncated input");
goto stop_and_fail;
}
origlen = le32dec(&z.next_in[0]);
if (origlen != out_sub_tot) {
maybe_warnx("invalid compressed"
" data--length error");
goto stop_and_fail;
}
}
z.avail_in -= 4;
z.next_in += 4;
if (error < 0) {
maybe_warnx("decompression error");
goto stop_and_fail;
}
state = GZSTATE_MAGIC0;
break;
}
continue;
stop_and_fail:
out_tot = -1;
stop:
break;
}
if (state > GZSTATE_INIT)
inflateEnd(&z);
free(inbufp);
out1:
free(outbufp);
out2:
if (gsizep)
*gsizep = in_tot;
return (out_tot);
}
/*
* set the owner, mode, flags & utimes using the given file descriptor.
* file is only used in possible warning messages.
*/
static void
copymodes(int fd, const struct stat *sbp, const char *file)
{
struct timespec times[2];
struct stat sb;
/*
* If we have no info on the input, give this file some
* default values and return..
*/
if (sbp == NULL) {
mode_t mask = umask(022);
(void)fchmod(fd, DEFFILEMODE & ~mask);
(void)umask(mask);
return;
}
sb = *sbp;
/* if the chown fails, remove set-id bits as-per compress(1) */
if (fchown(fd, sb.st_uid, sb.st_gid) < 0) {
if (errno != EPERM)
maybe_warn("couldn't fchown: %s", file);
sb.st_mode &= ~(S_ISUID|S_ISGID);
}
/* we only allow set-id and the 9 normal permission bits */
sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
if (fchmod(fd, sb.st_mode) < 0)
maybe_warn("couldn't fchmod: %s", file);
times[0] = sb.st_atim;
times[1] = sb.st_mtim;
if (futimens(fd, times) < 0)
maybe_warn("couldn't futimens: %s", file);
/* only try flags if they exist already */
if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0)
maybe_warn("couldn't fchflags: %s", file);
}
/* what sort of file is this? */
static enum filetype
file_gettype(u_char *buf)
{
if (buf[0] == GZIP_MAGIC0 &&
(buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
return FT_GZIP;
#ifndef NO_BZIP2_SUPPORT
else if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
buf[3] >= '0' && buf[3] <= '9')
return FT_BZIP2;
#endif
#ifndef NO_COMPRESS_SUPPORT
else if (memcmp(buf, Z_MAGIC, 2) == 0)
return FT_Z;
#endif
#ifndef NO_PACK_SUPPORT
else if (memcmp(buf, PACK_MAGIC, 2) == 0)
return FT_PACK;
#endif
#ifndef NO_XZ_SUPPORT
else if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */
return FT_XZ;
#endif
#ifndef NO_LZ_SUPPORT
else if (memcmp(buf, LZ_MAGIC, 4) == 0)
return FT_LZ;
#endif
#ifndef NO_ZSTD_SUPPORT
else if (memcmp(buf, ZSTD_MAGIC, 4) == 0)
return FT_ZSTD;
#endif
else
return FT_UNKNOWN;
}
/* check the outfile is OK. */
static int
check_outfile(const char *outfile)
{
struct stat sb;
int ok = 1;
if (lflag == 0 && stat(outfile, &sb) == 0) {
if (fflag)
unlink(outfile);
else if (isatty(STDIN_FILENO)) {
char ans[10] = { 'n', '\0' }; /* default */
fprintf(stderr, "%s already exists -- do you wish to "
"overwrite (y or n)? " , outfile);
(void)fgets(ans, sizeof(ans) - 1, stdin);
if (ans[0] != 'y' && ans[0] != 'Y') {
fprintf(stderr, "\tnot overwriting\n");
ok = 0;
} else
unlink(outfile);
} else {
maybe_warnx("%s already exists -- skipping", outfile);
ok = 0;
}
}
return ok;
}
static void
unlink_input(const char *file, const struct stat *sb)
{
struct stat nsb;
if (kflag)
return;
if (stat(file, &nsb) != 0)
/* Must be gone already */
return;
if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
/* Definitely a different file */
return;
unlink(file);
}
static void
got_sigint(int signo __unused)
{
if (remove_file != NULL)
unlink(remove_file);
_exit(2);
}
static void
got_siginfo(int signo __unused)
{
print_info = 1;
}
static void
setup_signals(void)
{
signal(SIGINFO, got_siginfo);
signal(SIGINT, got_sigint);
}
static void
infile_newdata(size_t newdata)
{
infile_current += newdata;
}
static void
infile_set(const char *newinfile, off_t total)
{
if (newinfile)
infile = newinfile;
infile_total = total;
}
static void
infile_clear(void)
{
infile = NULL;
infile_total = infile_current = 0;
}
static const suffixes_t *
check_suffix(char *file, int xlate)
{
const suffixes_t *s;
int len = strlen(file);
char *sp;
for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
/* if it doesn't fit in "a.suf", don't bother */
if (s->ziplen >= len)
continue;
sp = file + len - s->ziplen;
if (strcmp(s->zipped, sp) != 0)
continue;
if (xlate)
strcpy(sp, s->normal);
return s;
}
return NULL;
}
/*
* compress the given file: create a corresponding .gz file and remove the
* original.
*/
static off_t
file_compress(char *file, char *outfile, size_t outsize)
{
int in;
int out;
off_t size, in_size;
struct stat isb, osb;
const suffixes_t *suff;
in = open(file, O_RDONLY);
if (in == -1) {
maybe_warn("can't open %s", file);
return (-1);
}
if (fstat(in, &isb) != 0) {
maybe_warn("couldn't stat: %s", file);
close(in);
return (-1);
}
if (fstat(in, &isb) != 0) {
close(in);
maybe_warn("can't stat %s", file);
return -1;
}
infile_set(file, isb.st_size);
if (cflag == 0) {
if (isb.st_nlink > 1 && fflag == 0) {
maybe_warnx("%s has %ju other link%s -- "
"skipping", file,
(uintmax_t)isb.st_nlink - 1,
isb.st_nlink == 1 ? "" : "s");
close(in);
return -1;
}
if (fflag == 0 && (suff = check_suffix(file, 0)) &&
suff->zipped[0] != 0) {
maybe_warnx("%s already has %s suffix -- unchanged",
file, suff->zipped);
close(in);
return (-1);
}
/* Add (usually) .gz to filename */
if ((size_t)snprintf(outfile, outsize, "%s%s",
file, suffixes[0].zipped) >= outsize)
memcpy(outfile + outsize - suffixes[0].ziplen - 1,
suffixes[0].zipped, suffixes[0].ziplen + 1);
if (check_outfile(outfile) == 0) {
close(in);
return (-1);
}
}
if (cflag == 0) {
out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
if (out == -1) {
maybe_warn("could not create output: %s", outfile);
fclose(stdin);
return (-1);
}
remove_file = outfile;
} else
out = STDOUT_FILENO;
in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
(void)close(in);
/*
* If there was an error, in_size will be -1.
* If we compressed to stdout, just return the size.
* Otherwise stat the file and check it is the correct size.
* We only blow away the file if we can stat the output and it
* has the expected size.
*/
if (cflag != 0)
return in_size == -1 ? -1 : size;
if (fstat(out, &osb) != 0) {
maybe_warn("couldn't stat: %s", outfile);
goto bad_outfile;
}
if (osb.st_size != size) {
maybe_warnx("output file: %s wrong size (%ju != %ju), deleting",
outfile, (uintmax_t)osb.st_size, (uintmax_t)size);
goto bad_outfile;
}
copymodes(out, &isb, outfile);
remove_file = NULL;
if (close(out) == -1)
maybe_warn("couldn't close output");
/* output is good, ok to delete input */
unlink_input(file, &isb);
return (size);
bad_outfile:
if (close(out) == -1)
maybe_warn("couldn't close output");
maybe_warnx("leaving original %s", file);
unlink(outfile);
return (size);
}
/* uncompress the given file and remove the original */
static off_t
file_uncompress(char *file, char *outfile, size_t outsize)
{
struct stat isb, osb;
off_t size;
ssize_t rbytes;
unsigned char fourbytes[4];
enum filetype method;
int fd, ofd, zfd = -1;
int error;
size_t in_size;
ssize_t rv;
time_t timestamp = 0;
char name[PATH_MAX + 1];
/* gather the old name info */
fd = open(file, O_RDONLY);
if (fd < 0) {
maybe_warn("can't open %s", file);
goto lose;
}
if (fstat(fd, &isb) != 0) {
maybe_warn("can't stat %s", file);
goto lose;
}
if (S_ISREG(isb.st_mode))
in_size = isb.st_size;
else
in_size = 0;
infile_set(file, in_size);
strlcpy(outfile, file, outsize);
if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
maybe_warnx("%s: unknown suffix -- ignored", file);
goto lose;
}
rbytes = read(fd, fourbytes, sizeof fourbytes);
if (rbytes != sizeof fourbytes) {
/* we don't want to fail here. */
if (fflag)
goto lose;
if (rbytes == -1)
maybe_warn("can't read %s", file);
else
goto unexpected_EOF;
goto lose;
}
infile_newdata(rbytes);
method = file_gettype(fourbytes);
if (fflag == 0 && method == FT_UNKNOWN) {
maybe_warnx("%s: not in gzip format", file);
goto lose;
}
if (method == FT_GZIP && Nflag) {
unsigned char ts[4]; /* timestamp */
rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
if (rv >= 0 && rv < (ssize_t)(sizeof ts))
goto unexpected_EOF;
if (rv == -1) {
if (!fflag)
maybe_warn("can't read %s", file);
goto lose;
}
infile_newdata(rv);
timestamp = le32dec(&ts[0]);
if (fourbytes[3] & ORIG_NAME) {
rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
if (rbytes < 0) {
maybe_warn("can't read %s", file);
goto lose;
}
if (name[0] != '\0') {
char *dp, *nf;
/* Make sure that name is NUL-terminated */
name[rbytes] = '\0';
/* strip saved directory name */
nf = strrchr(name, '/');
if (nf == NULL)
nf = name;
else
nf++;
/* preserve original directory name */
dp = strrchr(file, '/');
if (dp == NULL)
dp = file;
else
dp++;
snprintf(outfile, outsize, "%.*s%.*s",
(int) (dp - file),
file, (int) rbytes, nf);
}
}
}
lseek(fd, 0, SEEK_SET);
if (cflag == 0 || lflag) {
if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
maybe_warnx("%s has %ju other links -- skipping",
file, (uintmax_t)isb.st_nlink - 1);
goto lose;
}
if (nflag == 0 && timestamp)
isb.st_mtime = timestamp;
if (check_outfile(outfile) == 0)
goto lose;
}
if (cflag)
zfd = STDOUT_FILENO;
else if (lflag)
zfd = -1;
else {
zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
if (zfd == STDOUT_FILENO) {
/* We won't close STDOUT_FILENO later... */
zfd = dup(zfd);
close(STDOUT_FILENO);
}
if (zfd == -1) {
maybe_warn("can't open %s", outfile);
goto lose;
}
remove_file = outfile;
}
switch (method) {
#ifndef NO_BZIP2_SUPPORT
case FT_BZIP2:
/* XXX */
if (lflag) {
maybe_warnx("no -l with bzip2 files");
goto lose;
}
size = unbzip2(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef NO_COMPRESS_SUPPORT
case FT_Z: {
FILE *in, *out;
/* XXX */
if (lflag) {
maybe_warnx("no -l with Lempel-Ziv files");
goto lose;
}
if ((in = zdopen(fd)) == NULL) {
maybe_warn("zdopen for read: %s", file);
goto lose;
}
out = fdopen(dup(zfd), "w");
if (out == NULL) {
maybe_warn("fdopen for write: %s", outfile);
fclose(in);
goto lose;
}
size = zuncompress(in, out, NULL, 0, NULL);
/* need to fclose() if ferror() is true... */
error = ferror(in);
if (error | fclose(in)) {
if (error)
maybe_warn("failed infile");
else
maybe_warn("failed infile fclose");
if (cflag == 0)
unlink(outfile);
(void)fclose(out);
goto lose;
}
if (fclose(out) != 0) {
maybe_warn("failed outfile fclose");
if (cflag == 0)
unlink(outfile);
goto lose;
}
break;
}
#endif
#ifndef NO_PACK_SUPPORT
case FT_PACK:
if (lflag) {
maybe_warnx("no -l with packed files");
goto lose;
}
size = unpack(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef NO_XZ_SUPPORT
case FT_XZ:
if (lflag) {
size = unxz_len(fd);
if (!tflag) {
print_list_out(in_size, size, file);
close(fd);
return -1;
}
} else
size = unxz(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef NO_LZ_SUPPORT
case FT_LZ:
if (lflag) {
maybe_warnx("no -l with lzip files");
goto lose;
}
size = unlz(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef NO_ZSTD_SUPPORT
case FT_ZSTD:
if (lflag) {
maybe_warnx("no -l with zstd files");
goto lose;
}
size = unzstd(fd, zfd, NULL, 0, NULL);
break;
#endif
case FT_UNKNOWN:
if (lflag) {
maybe_warnx("no -l for unknown filetypes");
goto lose;
}
size = cat_fd(NULL, 0, NULL, fd);
break;
default:
if (lflag) {
print_list(fd, in_size, outfile, isb.st_mtime);
if (!tflag) {
close(fd);
return -1; /* XXX */
}
}
size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
break;
}
if (close(fd) != 0)
maybe_warn("couldn't close input");
if (zfd != STDOUT_FILENO && close(zfd) != 0)
maybe_warn("couldn't close output");
if (size == -1) {
if (cflag == 0)
unlink(outfile);
maybe_warnx("%s: uncompress failed", file);
return -1;
}
/* if testing, or we uncompressed to stdout, this is all we need */
if (tflag)
return size;
/* if we are uncompressing to stdin, don't remove the file. */
if (cflag)
return size;
/*
* if we create a file...
*/
/*
* if we can't stat the file don't remove the file.
*/
ofd = open(outfile, O_RDWR, 0);
if (ofd == -1) {
maybe_warn("couldn't open (leaving original): %s",
outfile);
return -1;
}
if (fstat(ofd, &osb) != 0) {
maybe_warn("couldn't stat (leaving original): %s",
outfile);
close(ofd);
return -1;
}
if (osb.st_size != size) {
maybe_warnx("stat gave different size: %ju != %ju (leaving original)",
(uintmax_t)size, (uintmax_t)osb.st_size);
close(ofd);
unlink(outfile);
return -1;
}
copymodes(ofd, &isb, outfile);
remove_file = NULL;
close(ofd);
unlink_input(file, &isb);
return size;
unexpected_EOF:
maybe_warnx("%s: unexpected end of file", file);
lose:
if (fd != -1)
close(fd);
if (zfd != -1 && zfd != STDOUT_FILENO)
close(zfd);
return -1;
}
static void
check_siginfo(void)
{
if (print_info == 0)
return;
if (infile) {
if (infile_total) {
int pcent = (int)((100.0 * infile_current) / infile_total);
fprintf(stderr, "%s: done %llu/%llu bytes %d%%\n",
infile, (unsigned long long)infile_current,
(unsigned long long)infile_total, pcent);
} else
fprintf(stderr, "%s: done %llu bytes\n",
infile, (unsigned long long)infile_current);
}
print_info = 0;
}
static off_t
cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd)
{
char buf[BUFLEN];
off_t in_tot;
ssize_t w;
in_tot = count;
w = write_retry(STDOUT_FILENO, prepend, count);
if (w == -1 || (size_t)w != count) {
maybe_warn("write to stdout");
return -1;
}
for (;;) {
ssize_t rv;
rv = read(fd, buf, sizeof buf);
if (rv == 0)
break;
if (rv < 0) {
maybe_warn("read from fd %d", fd);
break;
}
infile_newdata(rv);
if (write_retry(STDOUT_FILENO, buf, rv) != rv) {
maybe_warn("write to stdout");
break;
}
in_tot += rv;
}
if (gsizep)
*gsizep = in_tot;
return (in_tot);
}
static void
handle_stdin(void)
{
struct stat isb;
unsigned char fourbytes[4];
size_t in_size;
off_t usize, gsize;
enum filetype method;
ssize_t bytes_read;
#ifndef NO_COMPRESS_SUPPORT
FILE *in;
#endif
if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
maybe_warnx("standard input is a terminal -- ignoring");
goto out;
}
if (fstat(STDIN_FILENO, &isb) < 0) {
maybe_warn("fstat");
goto out;
}
if (S_ISREG(isb.st_mode))
in_size = isb.st_size;
else
in_size = 0;
infile_set("(stdin)", in_size);
if (lflag) {
print_list(STDIN_FILENO, in_size, infile, isb.st_mtime);
goto out;
}
bytes_read = read_retry(STDIN_FILENO, fourbytes, sizeof fourbytes);
if (bytes_read == -1) {
maybe_warn("can't read stdin");
goto out;
} else if (bytes_read != sizeof(fourbytes)) {
maybe_warnx("(stdin): unexpected end of file");
goto out;
}
method = file_gettype(fourbytes);
switch (method) {
default:
if (fflag == 0) {
maybe_warnx("unknown compression format");
goto out;
}
usize = cat_fd(fourbytes, sizeof fourbytes, &gsize, STDIN_FILENO);
break;
case FT_GZIP:
usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
(char *)fourbytes, sizeof fourbytes, &gsize, "(stdin)");
break;
#ifndef NO_BZIP2_SUPPORT
case FT_BZIP2:
usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
(char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_COMPRESS_SUPPORT
case FT_Z:
if ((in = zdopen(STDIN_FILENO)) == NULL) {
maybe_warnx("zopen of stdin");
goto out;
}
usize = zuncompress(in, stdout, (char *)fourbytes,
sizeof fourbytes, &gsize);
fclose(in);
break;
#endif
#ifndef NO_PACK_SUPPORT
case FT_PACK:
usize = unpack(STDIN_FILENO, STDOUT_FILENO,
(char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_XZ_SUPPORT
case FT_XZ:
usize = unxz(STDIN_FILENO, STDOUT_FILENO,
(char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_LZ_SUPPORT
case FT_LZ:
usize = unlz(STDIN_FILENO, STDOUT_FILENO,
(char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
#ifndef NO_ZSTD_SUPPORT
case FT_ZSTD:
usize = unzstd(STDIN_FILENO, STDOUT_FILENO,
(char *)fourbytes, sizeof fourbytes, &gsize);
break;
#endif
}
if (vflag && !tflag && usize != -1 && gsize != -1)
print_verbage(NULL, NULL, usize, gsize);
if (vflag && tflag)
print_test("(stdin)", usize != -1);
out:
infile_clear();
}
static void
handle_stdout(void)
{
off_t gsize;
off_t usize;
struct stat sb;
time_t systime;
uint32_t mtime;
int ret;
infile_set("(stdout)", 0);
if (fflag == 0 && isatty(STDOUT_FILENO)) {
maybe_warnx("standard output is a terminal -- ignoring");
return;
}
/* If stdin is a file use its mtime, otherwise use current time */
ret = fstat(STDIN_FILENO, &sb);
if (ret < 0) {
maybe_warn("Can't stat stdin");
return;
}
if (S_ISREG(sb.st_mode)) {
infile_set("(stdout)", sb.st_size);
mtime = (uint32_t)sb.st_mtime;
} else {
systime = time(NULL);
if (systime == -1) {
maybe_warn("time");
return;
}
mtime = (uint32_t)systime;
}
usize =
gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
if (vflag && !tflag && usize != -1 && gsize != -1)
print_verbage(NULL, NULL, usize, gsize);
}
/* do what is asked for, for the path name */
static void
handle_pathname(char *path)
{
char *opath = path, *s = NULL;
ssize_t len;
int slen;
struct stat sb;
/* check for stdout/stdin */
if (path[0] == '-' && path[1] == '\0') {
if (dflag)
handle_stdin();
else
handle_stdout();
return;
}
retry:
if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 &&
lstat(path, &sb) != 0)) {
/* lets try <path>.gz if we're decompressing */
if (dflag && s == NULL && errno == ENOENT) {
len = strlen(path);
slen = suffixes[0].ziplen;
s = malloc(len + slen + 1);
if (s == NULL)
maybe_err("malloc");
memcpy(s, path, len);
memcpy(s + len, suffixes[0].zipped, slen + 1);
path = s;
goto retry;
}
maybe_warn("can't stat: %s", opath);
goto out;
}
if (S_ISDIR(sb.st_mode)) {
if (rflag)
handle_dir(path);
else
maybe_warnx("%s is a directory", path);
goto out;
}
if (S_ISREG(sb.st_mode))
handle_file(path, &sb);
else
maybe_warnx("%s is not a regular file", path);
out:
if (s)
free(s);
}
/* compress/decompress a file */
static void
handle_file(char *file, struct stat *sbp)
{
off_t usize, gsize;
char outfile[PATH_MAX];
infile_set(file, sbp->st_size);
if (dflag) {
usize = file_uncompress(file, outfile, sizeof(outfile));
if (vflag && tflag)
print_test(file, usize != -1);
if (usize == -1)
return;
gsize = sbp->st_size;
} else {
gsize = file_compress(file, outfile, sizeof(outfile));
if (gsize == -1)
return;
usize = sbp->st_size;
}
infile_clear();
if (vflag && !tflag)
print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
}
/* this is used with -r to recursively descend directories */
static void
handle_dir(char *dir)
{
char *path_argv[2];
FTS *fts;
FTSENT *entry;
path_argv[0] = dir;
path_argv[1] = 0;
fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
if (fts == NULL) {
warn("couldn't fts_open %s", dir);
return;
}
while (errno = 0, (entry = fts_read(fts))) {
switch(entry->fts_info) {
case FTS_D:
case FTS_DP:
continue;
case FTS_DNR:
case FTS_ERR:
case FTS_NS:
maybe_warn("%s", entry->fts_path);
continue;
case FTS_F:
handle_file(entry->fts_path, entry->fts_statp);
}
}
if (errno != 0)
warn("error with fts_read %s", dir);
(void)fts_close(fts);
}
/* print a ratio - size reduction as a fraction of uncompressed size */
static void
print_ratio(off_t in, off_t out, FILE *where)
{
int percent10; /* 10 * percent */
off_t diff;
char buff[8];
int len;
diff = in - out/2;
if (in == 0 && out == 0)
percent10 = 0;
else if (diff < 0)
/*
* Output is more than double size of input! print -99.9%
* Quite possibly we've failed to get the original size.
*/
percent10 = -999;
else {
/*
* We only need 12 bits of result from the final division,
* so reduce the values until a 32bit division will suffice.
*/
while (in > 0x100000) {
diff >>= 1;
in >>= 1;
}
if (in != 0)
percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
else
percent10 = 0;
}
len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
/* Move the '.' to before the last digit */
buff[len - 1] = buff[len - 2];
buff[len - 2] = '.';
fprintf(where, "%5s%%", buff);
}
/* print compression statistics, and the new name (if there is one!) */
static void
print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
{
if (file)
fprintf(stderr, "%s:%s ", file,
strlen(file) < 7 ? "\t\t" : "\t");
print_ratio(usize, gsize, stderr);
if (nfile)
fprintf(stderr, " -- replaced with %s", nfile);
fprintf(stderr, "\n");
fflush(stderr);
}
/* print test results */
static void
print_test(const char *file, int ok)
{
if (exit_value == 0 && ok == 0)
exit_value = 1;
fprintf(stderr, "%s:%s %s\n", file,
strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
fflush(stderr);
}
/* print a file's info ala --list */
/* eg:
compressed uncompressed ratio uncompressed_name
354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
*/
static void
print_list(int fd, off_t out, const char *outfile, time_t ts)
{
static int first = 1;
static off_t in_tot, out_tot;
uint32_t crc = 0;
off_t in = 0, rv;
if (first) {
if (vflag)
printf("method crc date time ");
if (qflag == 0)
printf(" compressed uncompressed "
"ratio uncompressed_name\n");
}
first = 0;
/* print totals? */
if (fd == -1) {
in = in_tot;
out = out_tot;
} else
{
/* read the last 4 bytes - this is the uncompressed size */
rv = lseek(fd, (off_t)(-8), SEEK_END);
if (rv != -1) {
unsigned char buf[8];
uint32_t usize;
rv = read(fd, (char *)buf, sizeof(buf));
if (rv == -1)
maybe_warn("read of uncompressed size");
else if (rv != sizeof(buf))
maybe_warnx("read of uncompressed size");
else {
usize = le32dec(&buf[4]);
in = (off_t)usize;
crc = le32dec(&buf[0]);
}
}
}
if (vflag && fd == -1)
printf(" ");
else if (vflag) {
char *date = ctime(&ts);
/* skip the day, 1/100th second, and year */
date += 4;
date[12] = 0;
printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
}
in_tot += in;
out_tot += out;
print_list_out(out, in, outfile);
}
static void
print_list_out(off_t out, off_t in, const char *outfile)
{
printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
print_ratio(in, out, stdout);
printf(" %s\n", outfile);
}
/* display the usage of NetBSD gzip */
static void
usage(void)
{
fprintf(stderr, "%s\n", gzip_version);
fprintf(stderr,
"usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
" -1 --fast fastest (worst) compression\n"
" -2 .. -8 set compression level\n"
" -9 --best best (slowest) compression\n"
" -c --stdout write to stdout, keep original files\n"
" --to-stdout\n"
" -d --decompress uncompress files\n"
" --uncompress\n"
" -f --force force overwriting & compress links\n"
" -h --help display this help\n"
" -k --keep don't delete input files during operation\n"
" -l --list list compressed file contents\n"
" -N --name save or restore original file name and time stamp\n"
" -n --no-name don't save original file name or time stamp\n"
" -q --quiet output no warnings\n"
" -r --recursive recursively compress files in directories\n"
" -S .suf use suffix .suf instead of .gz\n"
" --suffix .suf\n"
" -t --test test compressed file\n"
" -V --version display program version\n"
" -v --verbose print extra statistics\n",
getprogname());
exit(0);
}
/* display the license information of FreeBSD gzip */
static void
display_license(void)
{
fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version);
fprintf(stderr, "%s\n", gzip_copyright);
exit(0);
}
/* display the version of NetBSD gzip */
static void
display_version(void)
{
fprintf(stderr, "%s\n", gzip_version);
exit(0);
}
#ifndef NO_BZIP2_SUPPORT
#include "unbzip2.c"
#endif
#ifndef NO_COMPRESS_SUPPORT
#include "zuncompress.c"
#endif
#ifndef NO_PACK_SUPPORT
#include "unpack.c"
#endif
#ifndef NO_XZ_SUPPORT
#include "unxz.c"
#endif
#ifndef NO_LZ_SUPPORT
#include "unlz.c"
#endif
#ifndef NO_ZSTD_SUPPORT
#include "unzstd.c"
#endif
static ssize_t
read_retry(int fd, void *buf, size_t sz)
{
char *cp = buf;
size_t left = MIN(sz, (size_t) SSIZE_MAX);
while (left > 0) {
ssize_t ret;
ret = read(fd, cp, left);
if (ret == -1) {
return ret;
} else if (ret == 0) {
break; /* EOF */
}
cp += ret;
left -= ret;
}
return sz - left;
}
static ssize_t
write_retry(int fd, const void *buf, size_t sz)
{
const char *cp = buf;
size_t left = MIN(sz, (size_t) SSIZE_MAX);
while (left > 0) {
ssize_t ret;
ret = write(fd, cp, left);
if (ret == -1) {
return ret;
} else if (ret == 0) {
abort(); /* Can't happen */
}
cp += ret;
left -= ret;
}
return sz - left;
}
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