+++ /dev/null
-/* $NetBSD: gzip.c,v 1.85 2006/09/27 22:20:31 mrg Exp $ */
-
-/*-
- * Copyright (c) 1997, 1998, 2003, 2004, 2006 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.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * 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.
- *
- * $FreeBSD$
- */
-
-#include <sys/cdefs.h>
-
-/*
- * 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
- * - handle some signals better (remove outfile?)
- * - make bzip2/compress -v/-t/-l support work as well as possible
- */
-
-#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>
-
-#ifndef PRIdOFF
-#define PRIdOFF PRId64
-#endif
-
-/* 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
- FT_LAST,
- FT_UNKNOWN
-};
-
-#ifndef NO_BZIP2_SUPPORT
-#include <bzlib.h>
-
-#define BZ2_SUFFIX ".bz2"
-#define BZIP2_MAGIC "\102\132\150"
-#endif
-
-#ifndef NO_COMPRESS_SUPPORT
-#define Z_SUFFIX ".Z"
-#define Z_MAGIC "\037\235"
-#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 */
-#ifndef SMALL
- SUFFIX(GZ_SUFFIX, ""),
- SUFFIX(".z", ""),
- SUFFIX("-gz", ""),
- SUFFIX("-z", ""),
- SUFFIX("_z", ""),
- SUFFIX(".taz", ".tar"),
- SUFFIX(".tgz", ".tar"),
-#ifndef NO_BZIP2_SUPPORT
- SUFFIX(BZ2_SUFFIX, ""),
-#endif
-#ifndef NO_COMPRESS_SUPPORT
- SUFFIX(Z_SUFFIX, ""),
-#endif
- SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
-#endif /* SMALL */
-#undef SUFFIX
-};
-#define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
-
-static const char gzip_version[] = "Debian bsd-gzip 20060927";
-
-#ifndef SMALL
-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"
-" * 3. The name of the author may not be used to endorse or promote products\n"
-" * derived from this software without specific prior written permission.\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.";
-#endif
-
-static int cflag; /* stdout mode */
-static int dflag; /* decompress mode */
-static int lflag; /* list mode */
-static int numflag = 6; /* gzip -1..-9 value */
-
-#ifndef SMALL
-static int fflag; /* force mode */
-static int nflag; /* don't save name (impiles -m) */
-static int Nflag; /* restore name/timestamp */
-static int mflag; /* undocumented: don't save timestamp */
-static int qflag; /* quiet mode */
-static int rflag; /* recursive mode */
-static int tflag; /* test */
-static int vflag; /* verbose mode */
-#else
-#define qflag 0
-#define tflag 0
-#endif
-
-static int exit_value = 0; /* exit value */
-
-static char *infile; /* name of file coming in */
-
-static void maybe_err(const char *fmt, ...)
- __attribute__((__format__(__printf__, 1, 2)));
-#ifndef NO_BZIP2_SUPPORT
-static void maybe_errx(const char *fmt, ...)
- __attribute__((__format__(__printf__, 1, 2)));
-#endif
-static void maybe_warn(const char *fmt, ...)
- __attribute__((__format__(__printf__, 1, 2)));
-static void maybe_warnx(const char *fmt, ...)
- __attribute__((__format__(__printf__, 1, 2)));
-static enum filetype file_gettype(u_char *);
-#ifdef SMALL
-#define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
-#endif
-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);
-static void display_version(void);
-#ifndef SMALL
-static void display_license(void);
-#endif
-static const suffixes_t *check_suffix(char *, int);
-static ssize_t read_retry(int, void *, size_t);
-
-#ifdef SMALL
-#define unlink_input(f, sb) unlink(f)
-#else
-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);
-#endif
-
-#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
-
-int main(int, char **p);
-
-#ifdef SMALL
-#define getopt_long(a,b,c,d,e) getopt(a,b,c)
-#else
-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' },
- { "list", no_argument, 0, 'l' },
- { "no-name", no_argument, 0, 'n' },
- { "name", no_argument, 0, 'N' },
- { "no-timestamp", no_argument, 0, 'm' },
- { "force-timestamp", no_argument, 0, 'M' },
- { "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 },
-};
-#endif
-
-int
-main(int argc, char **argv)
-{
- const char *progname = argv[0];
-#ifndef SMALL
- char *gzip;
- int len;
-#endif
- int ch;
-
- /* XXX set up signals */
-
-#ifndef SMALL
- if ((gzip = getenv("GZIP")) != NULL)
- prepend_gzip(gzip, &argc, &argv);
-#endif
-
- /*
- * 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;
-
-#ifdef SMALL
-#define OPT_LIST "123456789cdhltV"
-#else
-#define OPT_LIST "123456789acdfhlLNnMmqrS:tVv"
-#endif
-
- 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 */
-#ifndef SMALL
- case 'a':
- fprintf(stderr, "%s: option --ascii ignored on this system\n", progname);
- break;
- case 'f':
- fflag = 1;
- break;
- case 'L':
- display_license();
- /* NOT REACHED */
- case 'N':
- nflag = 0;
- Nflag = 1;
- break;
- case 'n':
- nflag = 1;
- Nflag = 0;
- /* no break, n implies m */
- case 'm':
- mflag = 1;
- break;
- case 'M':
- mflag = 0;
- break;
- case 'q':
- qflag = 1;
- break;
- case 'r':
- rflag = 1;
- break;
- case 'S':
- len = strlen(optarg);
- if (len != 0) {
- 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;
-#endif
- 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);
- }
-#ifndef SMALL
- if (qflag == 0 && lflag && argc > 1)
- print_list(-1, 0, "(totals)", 0);
-#endif
- 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);
-}
-
-#ifndef NO_BZIP2_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
-
-#ifndef SMALL
-/* 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;
-}
-#endif
-
-/* 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;
-#ifdef SMALL
- static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
- 0, 0, 0, 0,
- 0, OS_CODE };
-#endif
-
- 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;
-
-#ifdef SMALL
- memcpy(outbufp, header, sizeof header);
- i = sizeof header;
-#else
- if (mflag != 0)
- mtime = 0;
- if (nflag != 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++;
-#endif
-
- 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(out, outbufp, BUFLEN) != BUFLEN) {
- maybe_warn("write");
- in_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;
-
- 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(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(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 (;;) {
- 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;
- }
-
- 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;
- }
- switch (state) {
- case GZSTATE_MAGIC0:
- if (*z.next_in != GZIP_MAGIC0) {
- 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:
- 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 (
-#ifndef SMALL
- /* don't write anything with -t */
- tflag == 0 &&
-#endif
- write(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 = ((unsigned)z.next_in[0] & 0xff) |
- ((unsigned)z.next_in[1] & 0xff) << 8 |
- ((unsigned)z.next_in[2] & 0xff) << 16 |
- ((unsigned)z.next_in[3] & 0xff) << 24;
- 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 = ((unsigned)z.next_in[0] & 0xff) |
- ((unsigned)z.next_in[1] & 0xff) << 8 |
- ((unsigned)z.next_in[2] & 0xff) << 16 |
- ((unsigned)z.next_in[3] & 0xff) << 24;
-
- 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);
-}
-
-#ifndef SMALL
-/*
- * 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 timeval 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);
-
-#if 0 /* broken on Linux */
- /* 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);
-
- TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec);
- TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec);
-#endif
- if (futimes(fd, times) < 0)
- maybe_warn("couldn't utimes: %s", file);
-}
-#endif
-
-/* 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;
- else
-#ifndef NO_BZIP2_SUPPORT
- if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
- buf[3] >= '0' && buf[3] <= '9')
- return FT_BZIP2;
- else
-#endif
-#ifndef NO_COMPRESS_SUPPORT
- if (memcmp(buf, Z_MAGIC, 2) == 0)
- return FT_Z;
- else
-#endif
- return FT_UNKNOWN;
-}
-
-#ifndef SMALL
-/* 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 overwritting\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 (stat(file, &nsb) != 0)
- /* Must be gone alrady */
- return;
- if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
- /* Definitely a different file */
- return;
- unlink(file);
-}
-#endif
-
-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, insize;
-#ifndef SMALL
- struct stat isb, osb;
- const suffixes_t *suff;
-#endif
-
- in = open(file, O_RDONLY);
- if (in == -1) {
- maybe_warn("can't open %s", file);
- return -1;
- }
-
- if (cflag == 0) {
-#ifndef SMALL
- if (fstat(in, &isb) == 0) {
- if (isb.st_nlink > 1 && fflag == 0) {
- maybe_warnx("%s has %d other link%s -- "
- "skipping", file, 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;
- }
-#endif
-
- /* Add (usually) .gz to filename */
- if ((size_t)snprintf(outfile, outsize, "%s%s",
- file, suffixes[0].zipped) >= outsize)
- memcpy(outfile - suffixes[0].ziplen - 1,
- suffixes[0].zipped, suffixes[0].ziplen + 1);
-
-#ifndef SMALL
- if (check_outfile(outfile) == 0) {
- close(in);
- return -1;
- }
-#endif
- }
-
- 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;
- }
- } else
- out = STDOUT_FILENO;
-
- insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
-
- (void)close(in);
-
- /*
- * If there was an error, insize 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 insize == -1 ? -1 : size;
-
-#ifndef SMALL
- 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 (%" PRIdOFF
- " != %" PRIdOFF "), deleting",
- outfile, osb.st_size, size);
- goto bad_outfile;
- }
-
- copymodes(out, &isb, outfile);
-#endif
- if (close(out) == -1)
- maybe_warn("couldn't close output");
-
- /* output is good, ok to delete input */
- unlink_input(file, &isb);
- return size;
-
-#ifndef SMALL
- bad_outfile:
- if (close(out) == -1)
- maybe_warn("couldn't close output");
-
- maybe_warnx("leaving original %s", file);
- unlink(outfile);
- return size;
-#endif
-}
-
-/* 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 header1[4];
- enum filetype method;
- int rv, fd, ofd, zfd = -1;
-#ifndef SMALL
- time_t timestamp = 0;
- unsigned char name[PATH_MAX + 1];
-#endif
-
- /* gather the old name info */
-
- fd = open(file, O_RDONLY);
- if (fd < 0) {
- maybe_warn("can't open %s", file);
- goto lose;
- }
-
- strncpy(outfile, file, outsize);
- if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
- maybe_warnx("%s: unknown suffix -- ignored", file);
- goto lose;
- }
-
- rbytes = read(fd, header1, sizeof header1);
- if (rbytes != sizeof header1) {
- /* we don't want to fail here. */
-#ifndef SMALL
- if (fflag)
- goto lose;
-#endif
- if (rbytes == -1)
- maybe_warn("can't read %s", file);
- else
- goto unexpected_EOF;
- goto lose;
- }
-
- method = file_gettype(header1);
-
-#ifndef SMALL
- if (fflag == 0 && method == FT_UNKNOWN) {
- maybe_warnx("%s: not in gzip format", file);
- goto lose;
- }
-
-#endif
-
-#ifndef SMALL
- if (method == FT_GZIP && Nflag) {
- unsigned char ts[4]; /* timestamp */
-
- rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
- if (rv >= 0 && (size_t)rv < sizeof ts)
- goto unexpected_EOF;
- if (rv == -1) {
- if (!fflag)
- maybe_warn("can't read %s", file);
- goto lose;
- }
- timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
-
- if (header1[3] & ORIG_NAME) {
- rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
- if (rbytes < 0) {
- maybe_warn("can't read %s", file);
- goto lose;
- }
- if (name[0] != 0) {
- /* preserve original directory name */
- char *dp = strrchr(file, '/');
- if (dp == NULL)
- dp = file;
- else
- dp++;
- snprintf(outfile, outsize, "%.*s%.*s",
- (int) (dp - file),
- file, (int) rbytes, name);
- }
- }
- }
-#endif
- lseek(fd, 0, SEEK_SET);
-
- if (cflag == 0 || lflag) {
- if (fstat(fd, &isb) != 0)
- goto lose;
-#ifndef SMALL
- if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
- maybe_warnx("%s has %d other links -- skipping",
- file, isb.st_nlink - 1);
- goto lose;
- }
- if (mflag == 0 && timestamp)
- isb.st_mtime = timestamp;
- if (check_outfile(outfile) == 0)
- goto lose;
-#endif
- }
-
- if (cflag == 0 && lflag == 0) {
- 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;
- }
- } else
- zfd = STDOUT_FILENO;
-
-#ifndef NO_BZIP2_SUPPORT
- if (method == FT_BZIP2) {
-
- /* XXX */
- if (lflag) {
- maybe_warnx("no -l with bzip2 files");
- goto lose;
- }
-
- size = unbzip2(fd, zfd, NULL, 0, NULL);
- } else
-#endif
-
-#ifndef NO_COMPRESS_SUPPORT
- if (method == 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... */
- if (ferror(in) | fclose(in)) {
- maybe_warn("failed infile fclose");
- unlink(outfile);
- (void)fclose(out);
- }
- if (fclose(out) != 0) {
- maybe_warn("failed outfile fclose");
- unlink(outfile);
- goto lose;
- }
- } else
-#endif
-
-#ifndef SMALL
- if (method == FT_UNKNOWN) {
- if (lflag) {
- maybe_warnx("no -l for unknown filetypes");
- goto lose;
- }
- size = cat_fd(NULL, 0, NULL, fd);
- } else
-#endif
- {
- if (lflag) {
- print_list(fd, isb.st_size, outfile, isb.st_mtime);
- close(fd);
- return -1; /* XXX */
- }
-
- size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
- }
-
- 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 */
-#ifndef SMALL
- if (tflag)
- return size;
-#endif
- /* 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: %" PRIdOFF
- " != %" PRIdOFF " (leaving original)",
- size, osb.st_size);
- close(ofd);
- unlink(outfile);
- return -1;
- }
- unlink_input(file, &isb);
-#ifndef SMALL
- copymodes(ofd, &isb, outfile);
-#endif
- close(ofd);
- 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(fd);
- return -1;
-}
-
-#ifndef SMALL
-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(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;
- }
-
- if (write(STDOUT_FILENO, buf, rv) != rv) {
- maybe_warn("write to stdout");
- break;
- }
- in_tot += rv;
- }
-
- if (gsizep)
- *gsizep = in_tot;
- return (in_tot);
-}
-#endif
-
-static void
-handle_stdin(void)
-{
- unsigned char header1[4];
- off_t usize, gsize;
- enum filetype method;
- ssize_t bytes_read;
-#ifndef NO_COMPRESS_SUPPORT
- FILE *in;
-#endif
-
-#ifndef SMALL
- if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
- maybe_warnx("standard input is a terminal -- ignoring");
- return;
- }
-#endif
-
- if (lflag) {
- struct stat isb;
-
- /* XXX could read the whole file, etc. */
- if (fstat(STDIN_FILENO, &isb) < 0) {
- maybe_warn("fstat");
- return;
- }
- print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
- return;
- }
-
- bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
- if (bytes_read == -1) {
- maybe_warn("can't read stdin");
- return;
- } else if (bytes_read != sizeof(header1)) {
- maybe_warnx("(stdin): unexpected end of file");
- return;
- }
-
- method = file_gettype(header1);
- switch (method) {
- default:
-#ifndef SMALL
- if (fflag == 0) {
- maybe_warnx("unknown compression format");
- return;
- }
- usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
- break;
-#endif
- case FT_GZIP:
- usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize, "(stdin)");
- break;
-#ifndef NO_BZIP2_SUPPORT
- case FT_BZIP2:
- usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
- (char *)header1, sizeof header1, &gsize);
- break;
-#endif
-#ifndef NO_COMPRESS_SUPPORT
- case FT_Z:
- if ((in = zdopen(STDIN_FILENO)) == NULL) {
- maybe_warnx("zopen of stdin");
- return;
- }
-
- usize = zuncompress(in, stdout, (char *)header1, sizeof header1, &gsize);
- fclose(in);
- break;
-#endif
- }
-
-#ifndef SMALL
- if (vflag && !tflag && usize != -1 && gsize != -1)
- print_verbage(NULL, NULL, usize, gsize);
- if (vflag && tflag)
- print_test("(stdin)", usize != -1);
-#endif
-
-}
-
-static void
-handle_stdout(void)
-{
- off_t gsize, usize;
- struct stat sb;
- time_t systime;
- uint32_t mtime;
- int ret;
-
-#ifndef SMALL
- if (fflag == 0 && isatty(STDOUT_FILENO)) {
- maybe_warnx("standard output is a terminal -- ignoring");
- return;
- }
-#endif
- /* If stdin is a file use it's mtime, otherwise use current time */
- ret = fstat(STDIN_FILENO, &sb);
-
-#ifndef SMALL
- if (ret < 0) {
- maybe_warn("Can't stat stdin");
- return;
- }
-#endif
-
- if (S_ISREG(sb.st_mode))
- mtime = (uint32_t)sb.st_mtime;
- else {
- systime = time(NULL);
-#ifndef SMALL
- if (systime == -1) {
- maybe_warn("time");
- return;
- }
-#endif
- mtime = (uint32_t)systime;
- }
-
- usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
-#ifndef SMALL
- if (vflag && !tflag && usize != -1 && gsize != -1)
- print_verbage(NULL, NULL, usize, gsize);
-#endif
-}
-
-/* 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) {
- /* 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)) {
-#ifndef SMALL
- if (rflag)
- handle_dir(path);
- else
-#endif
- 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 = file;
- if (dflag) {
- usize = file_uncompress(file, outfile, sizeof(outfile));
-#ifndef SMALL
- if (vflag && tflag)
- print_test(file, usize != -1);
-#endif
- if (usize == -1)
- return;
- gsize = sbp->st_size;
- } else {
- gsize = file_compress(file, outfile, sizeof(outfile));
- if (gsize == -1)
- return;
- usize = sbp->st_size;
- }
-
-
-#ifndef SMALL
- if (vflag && !tflag)
- print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
-#endif
-}
-
-#ifndef SMALL
-/* 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, NULL);
- if (fts == NULL) {
- warn("couldn't fts_open %s", dir);
- return;
- }
-
- while ((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_name, entry->fts_statp);
- }
- }
- (void)fts_close(fts);
-}
-#endif
-
-/* 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 (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);
-}
-
-#ifndef SMALL
-/* 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);
-}
-#endif
-
-/* 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;
-#ifndef SMALL
- static off_t in_tot, out_tot;
- uint32_t crc = 0;
-#endif
- off_t in = 0, rv;
-
- if (first) {
-#ifndef SMALL
- if (vflag)
- printf("method crc date time ");
-#endif
- if (qflag == 0)
- printf(" compressed uncompressed "
- "ratio uncompressed_name\n");
- }
- first = 0;
-
- /* print totals? */
-#ifndef SMALL
- if (fd == -1) {
- in = in_tot;
- out = out_tot;
- } else
-#endif
- {
- /* 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 = buf[4] | buf[5] << 8 |
- buf[6] << 16 | buf[7] << 24;
- in = (off_t)usize;
-#ifndef SMALL
- crc = buf[0] | buf[1] << 8 |
- buf[2] << 16 | buf[3] << 24;
-#endif
- }
- }
- }
-
-#ifndef SMALL
- 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;
-#endif
- 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 [-" OPT_LIST "] [<file> [<file> ...]]\n"
-#ifndef SMALL
- " -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"
- " -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",
-#else
- ,
-#endif
- "gzip");
- exit(0);
-}
-
-#ifndef SMALL
-/* display the license information of NetBSD gzip */
-static void
-display_license(void)
-{
-
- fprintf(stderr, "%s\n", gzip_version);
- fprintf(stderr, "%s\n", gzip_copyright);
- exit(0);
-}
-#endif
-
-/* 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
-
-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;
-}
-
return (\@flags, $timestamp, $level, $os, $name);
}
-sub findgzipargs($$$) {
+sub predictgzipargs($$$) {
my ($flags, $timestamp, $level) = @_;
my @flags = @$flags;
return $? >> 8;
}
-sub gunzip($$) {
- my ($filename, $name) = (shift, shift);
- doit('gunzip', '-N', $filename);
- if (-e $filename) {
- die("gunzip failed, aborting");
- } elsif ($name && -e $name) {
- # original filename because we passed -N to gunzip
- return $name;
- } else {
- $filename =~ s/\.gz$//;
- unless (-e $filename) {
- die("gunzip succeded but I can't find the filename");
+sub testvariant($$$@) {
+ my ($old, $new, $origname, @args) = @_;
+
+ # Unzip attempt of the previous run (or the original on the first run)
+ doit('gunzip', '-N', $new);
+ if (-e $new) {
+ die "gunzip failed, aborting";
+ }
+ elsif ($origname && -e $origname) {
+ # original new because we passed -N to gunzip
+ $new = $origname;
+ }
+ else {
+ $new =~ s/\.gz$//;
+ unless (-e $new) {
+ die("gunzip succeded but I can't find the new file");
}
- return $filename;
}
-}
-sub gzip($@) {
- my ($filename, @args) = @_;
-
- doit(@args, $filename);
- $filename .= '.gz';
- unless (-e $filename) {
- die("gzip failed, aborting");
+ # try gzipping with the arguments passed
+ doit('zgz', @args, $new);
+ $new .= '.gz';
+ unless (-e $new) {
+ die("zgz failed, aborting");
}
- return $filename;
-}
-
-sub cyclegzip($$@) {
- my ($filename, $name, @args) = @_;
-print ">> @args\n";
- $filename = gunzip($filename, $name);
- $filename = gzip($filename, @args);
- return $filename;
+ # and compare the generated with the original
+ return !comparefiles($old, $new);
}
-sub reproducegz {
- my $orig=shift;
- my $wd=shift;
-
- # copy the original .gz to the newly created temporary directory
- my $tmp = "$wd/".basename($orig);
- doit("cp", $orig, $tmp);
+sub reproducegz($$$) {
+ my ($wd, $orig, $new) = (shift, shift, shift);
# read fields from gzip headers
- my ($flags, $timestamp, $level, $os, $name) = readgzip($tmp);
- debug("Examining $orig", $name ? " (real: $name)" : '');
- $name = "$wd/$name" if $name;
+ my ($flags, $timestamp, $level, $os, $name) = readgzip($new);
# try to guess the gzip arguments that are needed by the header
# information
- my @args = findgzipargs($flags, $timestamp, $level);
-
- my @methods=(
- # for 98% of the cases the simple heuristic works
- sub {
- debug("Trying 'gzip ", join(' ', @args), "'...");
- return undef, "gzip", @args;
- },
- # some archives have an Operating System flag different
- # than Unix
- # XXX: if they're the same, just replace the bit
- #sub {
- # if ($os != GZIP_OS_UNIX) {
- # debug("Unknown Operating System: $os");
- # }
- #},
- # some .gz are created using --rsyncable -- this is a
- # Debian-specific option however and it's not very popular
- sub {
- debug("Trying with --rsyncable...");
- return undef, "gzip", @args, '--rsyncable';
- },
- # many of the .gz out there are created using the BSD version
- # of gzip which is using the zlib library; try with our version
- # of bsd-gzip with added support for the undocumented GNU gzip
- # options -m and -M
- sub {
- debug("Trying with bsd-gzip...");
- return undef, "bsd-gzip", @args;
- },
- # apparently, there is an old version of bsd-gzip (or a similar
- # tool based on zlib) that creates gz using maximum compression
- # (-9) but does not indicate so in the headers. surprisingly,
- # there are many .gz out there
- sub {
- debug("Trying with buggy variant of bsd-gzip...");
- return undef, "bsd-gzip", @args, '--no-xfl';
- },
- );
-
- foreach my $method (@methods) {
- my @r=$method->();
- my $postsub=shift @r;
- $tmp = cyclegzip($tmp, $name, @r);
- $postsub->() if $postsub;
- doit("md5sum", $orig, $tmp);
- if (comparefiles($orig, $tmp) == 0) {
- $tmp=~s/\.gz$//;
- return basename($tmp), $timestamp, 0, @r;
- }
- };
+ my @args = predictgzipargs($flags, $timestamp, $level);
+
+ $name = "$wd/$name" if $name && $name !~ /\//;
+
+ if ($os == GZIP_OS_UNIX && $name !~ /\//) {
+ # for 98% of the cases the simple heuristic above works
+ testvariant($orig, $new, $name, '--gnu', @args)
+ && return $name, $timestamp, '--gnu', @args;
+
+ # some .gz are created using --rsyncable
+ # it is a Debian-specific option not very popular
+ testvariant($orig, $new, $name, '--gnu', @args, '--rsyncable')
+ && return $name, $timestamp, '--gnu', @args, '--rsyncable';
+ }
+
+ if ($name =~ /\//) {
+ push @args, "--original-name", $name;
+ $name = basename($name);
+ $name = "$wd/$name";
+ }
+
+ # Windows' NTFS gzip implementation; quirk is really really evil
+ if ($os == GZIP_OS_NTFS) {
+ testvariant($orig, $new, $name, @args, '--quirk', 'ntfs')
+ && return $name, $timestamp, @args, '--quirk', 'ntfs';
+ }
+
+ # set the Operating System flag to the one found in the original
+ # archive
+ push @args, ("--osflag", $os) if $os != GZIP_OS_UNIX;
+
+ # many of the .gz out there are created using the BSD version of
+ # gzip which is using the zlib library; try with our version of
+ # bsd-gzip with added support for the undocumented GNU gzip options
+ # -m and -M
+ testvariant($orig, $new, $name, @args)
+ && return $name, $timestamp, @args;
+
+ # apparently, there is an old version of bsd-gzip (or a similar tool
+ # based on zlib) that creates gz using maximum compression (-9) but
+ # does not indicate so in the headers. surprisingly, there are many
+ # .gz out there.
+ testvariant($orig, $new, $name, @args, '--quirk', 'buggy-bsd')
+ && return $name. $timestamp, @args, '--quirk', 'buggy-bsd';
print STDERR("pristine-gz failed to reproduce build of $orig\n");
print STDERR("(Please file a bug report.)\n");
}
- open (IN, "$tempdir/program") || die "delta lacks program file ($!)";
- my $program=<IN>;
- chomp $program;
- if ($program !~ /^(gzip|bsd-gzip)$/) {
- die "paranoia check failed on program file from delta ($program)";
- }
- close IN;
open (IN, "$tempdir/params") || die "delta lacks params file ($!)";
my $params=<IN>;
chomp $params;
my @params=split(' ', $params);
- if (grep { ! /^(--no-xfl|--rsyncable|-[nmM1-9])$/ } @params) {
- die "paranoia check failed on params file from delta (@params)";
+ while (@params) {
+ $_=shift @params;
+ next if /^(--gnu|--rsyncable|-[nmM1-9])$/;
+ if (/^(--original-name|--quirk|--osflag)$/) {
+ shift @params;
+ }
+ die "paranoia check failed on params file from delta ($params)";
}
+ @params=split(' ', $params);
close IN;
open (IN, "$tempdir/filename") || die "delta lacks filename file ($!)";
my $filename=<IN>;
chomp $filename;
+ if ($filename =~ /\//) {
+ die "paranoia check failed on filename field from delta ($filename)";
+ }
+ if (! length $filename) {
+ $filename="input";
+ }
close IN;
open (IN, "$tempdir/timestamp") || die "delta lacks timestamp file ($!)";
my $timestamp=<IN>;
doit("cp", $file, "$tempdir/$filename");
utime($timestamp, $timestamp, "$tempdir/$filename") ||
die "utime: $!";
- doit($program, @params, "-f", "$tempdir/$filename");
+ doit("zgz", @params, "-f", "$tempdir/$filename");
doit("mv", "$tempdir/$filename.gz", "$file.gz");
doit("rm", "-f", "$tempdir/$filename.gz", $file);
}
my $delta=shift;
my $tempdir=tempdir();
- my @files=qw(version type program params filename timestamp);
-
- my $sourcedir="$tempdir/tmp";
- doit("mkdir $sourcedir");
+ my @files=qw(version type params filename timestamp);
- my ($filename, $timestamp, $osflag, $program, @params)=
- reproducegz($gzfile, $tempdir);
+ doit("cp", $gzfile, "$tempdir/test.gz");
+ my ($filename, $timestamp, @params)=
+ reproducegz($tempdir, $gzfile, "$tempdir/test.gz");
open(OUT, ">", "$tempdir/version") || die "$!";
print OUT "1.1\n";
open(OUT, ">", "$tempdir/type") || die "$!";
print OUT "gz\n";
close OUT;
- open(OUT, ">", "$tempdir/program") || die "$!";
- print OUT "$program\n";
- close OUT;
open(OUT, ">", "$tempdir/params") || die "$!";
print OUT "@params\n";
close OUT;
projects / tools / pristine-tar.git / commitdiff