--- /dev/null
+/*-
+ * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green
+ * Copyright (c) 2007 Faidon Liambotis
+ * 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.
+ */
+
+/*
+ * 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
+ *
+ */
+
+#define _GNU_SOURCE
+
+#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,
+ FT_LAST,
+ FT_UNKNOWN
+};
+
+#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 GZIP_OS_UNIX 3 /* Unix */
+#define GZIP_OS_NTFS 11 /* NTFS */
+
+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"),
+ SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
+#undef SUFFIX
+};
+#define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
+
+static const char gzip_version[] = "zgz 20071002 based on NetBSD gzip 20060927";
+
+static const char gzip_copyright[] = \
+" Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n"
+" Copyright (c) 2007 Faidon Liambotis\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.";
+
+static int cflag; /* stdout mode */
+static int lflag; /* list mode */
+static int numflag = 6; /* gzip -1..-9 value */
+
+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 tflag; /* test */
+static int vflag; /* verbose mode */
+static int xflag = -1; /* don't set Extra Flags (i.e. compression level)
+ binary compatibility with an older, buggy version */
+static int osflag = GZIP_OS_UNIX; /* Unix or otherwise */
+static int ntfs_quirk = 0; /* whether NTFS quirk is activated */
+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)));
+static void maybe_warn(const char *fmt, ...)
+ __attribute__((__format__(__printf__, 1, 2)));
+static void maybe_warnx(const char *fmt, ...)
+ __attribute__((__format__(__printf__, 1, 2)));
+#if XXX_INPUT
+static enum filetype file_gettype(u_char *);
+#endif
+static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
+static off_t file_compress(char *, char *, char *, size_t);
+static void handle_pathname(char *, char *);
+static void handle_file(char *, char *, struct stat *);
+static void handle_stdout(char *);
+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);
+static void display_license(void);
+static const suffixes_t *check_suffix(char *, int);
+
+static void prepend_gzip(char *, int *, char ***);
+static void print_verbage(const char *, const char *, off_t, off_t);
+static void copymodes(int fd, const struct stat *, const char *file);
+static int check_outfile(const char *outfile);
+
+int main(int, char **p);
+
+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' },
+ { "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' },
+ { "fast", no_argument, 0, '1' },
+ { "best", no_argument, 0, '9' },
+ { "ascii", no_argument, 0, 'a' },
+ /* new options */
+ { "no-timestamp", no_argument, 0, 'm' },
+ { "force-timestamp", no_argument, 0, 'M' },
+ { "osflag", required_argument, 0, 's' },
+ { "original-name", required_argument, 0, 'o' },
+ { "quirk", required_argument, 0, 'k' },
+ /* end */
+ { "version", no_argument, 0, 'V' },
+ { "license", no_argument, 0, 'L' },
+ { NULL, no_argument, 0, 0 },
+};
+
+int
+main(int argc, char **argv)
+{
+ const char *progname = argv[0];
+ char origname[BUFLEN] = { 0 };
+ char *gzip;
+ int len;
+ int ch;
+
+ if ((gzip = getenv("GZIP")) != NULL)
+ prepend_gzip(gzip, &argc, &argv);
+
+ if (strcmp(progname, "gunzip") == 0 ||
+ strcmp(progname, "zcat") == 0 ||
+ strcmp(progname, "gzcat") == 0) {
+ fprintf(stderr, "%s: decompression is not supported on this version\n", progname);
+ usage();
+ }
+
+ if (argc > 1 && strcmp(argv[1], "--gnu") == 0) {
+ /* omit first argument, i.e. --gnu */
+ argv++;
+ /* works because "--gnu" is bigger than "gzip" */
+ strcpy(argv[0], "gzip");
+ execv("/bin/gzip", argv);
+
+ /* NOT REACHED */
+ fprintf(stderr, "Failed to spawn /bin/gzip\n");
+ exit(1);
+ } else if (argc > 1 && strcmp(argv[1], "--zlib") == 0) {
+ /* skip --zlib argument if existent */
+ argc--;
+ argv++;
+ }
+
+#define OPT_LIST "123456789acdfhlLNnMmqrS:tVvi:k:s:"
+
+ 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 'l':
+ lflag = 1;
+ break;
+ case 'f':
+ fflag = 1;
+ break;
+ 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 '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;
+ break;
+ case 'v':
+ vflag = 1;
+ break;
+ case 's':
+ osflag = atoi(optarg);
+ break;
+ case 'o':
+ if (nflag)
+ fprintf(stderr, "%s: ignoring original-name because no-name was passed\n", progname);
+ strncpy(origname, optarg, BUFLEN);
+ break;
+ case 'k':
+ if (strcmp(optarg, "buggy-bsd") == 0) {
+ /* certain archives made with older versions of
+ * BSD variants of gzip */
+
+ /* no name or timestamp information */
+ nflag = 1;
+ mflag = 1;
+ /* maximum compression but without indicating so */
+ numflag = 9;
+ xflag = 0;
+ } else if (strcmp(optarg, "ntfs") == 0) {
+ ntfs_quirk = 1;
+ /* no name or timestamp information */
+ nflag = 1;
+ mflag = 1;
+ /* osflag is NTFS */
+ osflag = GZIP_OS_NTFS;
+ } else {
+ fprintf(stderr, "%s: unknown quirk!\n", progname);
+ usage();
+ }
+ break;
+ case 'r':
+ fprintf(stderr, "%s: recursive is not supported on this version\n", progname);
+ usage();
+ break;
+ case 'd':
+ fprintf(stderr, "%s: decompression is not supported on this version\n", progname);
+ usage();
+ break;
+ case 'a':
+ fprintf(stderr, "%s: option --ascii ignored on this version\n", progname);
+ break;
+ case 'V':
+ display_version();
+ /* NOTREACHED */
+ case 'L':
+ display_license();
+ /* NOT REACHED */
+ default:
+ usage();
+ /* NOTREACHED */
+ }
+ }
+ argv += optind;
+ argc -= optind;
+
+ if (argc == 0) {
+ handle_stdout(origname);
+ } else {
+ do {
+ handle_pathname(argv[0], origname);
+ } 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);
+}
+
+/* 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 (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,
+ xflag >= 0 ? xflag :
+ numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
+ osflag, 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(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;
+
+ /* for a really strange reason, that
+ * particular byte is decremented */
+ if (ntfs_quirk)
+ outbufp[10]--;
+
+ 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;
+ }
+
+ if (ntfs_quirk) {
+ /* write NTFS tail magic (?) */
+ i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c",
+ 0x00, 0x00, 0xff, 0xff, 0x03, 0x00);
+ if (i != 6)
+ maybe_err("snprintf");
+ if (write(out, outbufp, i) != i) {
+ maybe_warn("write");
+ in_tot = -1;
+ } else
+ out_tot += i;
+ }
+
+ /* write CRC32 and input size (ISIZE) at the tail */
+ 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;
+}
+
+
+/*
+ * 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 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 INPUT
+/* 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
+ return FT_UNKNOWN;
+}
+#endif
+
+/* 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);
+}
+
+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 *origname, char *outfile, size_t outsize)
+{
+ int in;
+ int out;
+ off_t size, insize;
+ 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 (cflag == 0) {
+ 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;
+ }
+
+ /* 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);
+
+ if (check_outfile(outfile) == 0) {
+ close(in);
+ return -1;
+ }
+
+ 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, origname, (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;
+
+ 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, (long long)osb.st_size,
+ (long long)size);
+ goto bad_outfile;
+ }
+
+ copymodes(out, &isb, outfile);
+ 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;
+}
+
+static void
+handle_stdout(char *origname)
+{
+ off_t gsize, usize;
+ struct stat sb;
+ time_t systime;
+ uint32_t mtime;
+ int ret;
+
+ if (fflag == 0 && isatty(STDOUT_FILENO)) {
+ maybe_warnx("standard output is a terminal -- ignoring");
+ return;
+ }
+ /* If stdin is a file use it's 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))
+ 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, origname, 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 *origname)
+{
+ char *opath = path;
+ struct stat sb;
+
+ /* check for stdout */
+ if (path[0] == '-' && path[1] == '\0') {
+ handle_stdout(origname);
+ return;
+ }
+
+ if (stat(path, &sb) != 0) {
+ maybe_warn("can't stat: %s", opath);
+ return;
+ }
+
+ if (S_ISDIR(sb.st_mode)) {
+ maybe_warnx("%s is a directory", path);
+ return;
+ }
+
+ if (S_ISREG(sb.st_mode))
+ handle_file(path, strlen(origname) ? origname : basename(path), &sb);
+ else
+ maybe_warnx("%s is not a regular file", path);
+}
+
+/* compress/decompress a file */
+static void
+handle_file(char *file, char *origname, struct stat *sbp)
+{
+ off_t usize, gsize;
+ char outfile[PATH_MAX];
+
+ infile = file;
+ gsize = file_compress(file, origname, outfile, sizeof(outfile));
+ if (gsize == -1)
+ return;
+ usize = sbp->st_size;
+
+ if (vflag && !tflag)
+ print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
+}
+
+/* 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);
+}
+
+/* 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 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 = buf[4] | buf[5] << 8 |
+ buf[6] << 16 | buf[7] << 24;
+ in = (off_t)usize;
+ crc = buf[0] | buf[1] << 8 |
+ buf[2] << 16 | buf[3] << 24;
+ }
+ }
+ }
+
+ 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;
+
+ 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 [--gnu | --zlib] [-" OPT_LIST "] [<file> [<file> ...]]\n"
+ " --gnu use GNU gzip (/bin/gzip)\n"
+ " --zlib use zlib's implementation (default)\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"
+ " -f --force force overwriting & compress links\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"
+ " -m --no-timestamp don't save original time stamp\n"
+ " -M --force-timestemp save the timestamp even if -n was passed\n"
+ " -S .suf use suffix .suf instead of .gz\n"
+ " --suffix .suf\n"
+ " -t --test test compressed file\n"
+ " -q --quiet output no warnings\n"
+ " -V --version display program version\n"
+ " -v --verbose print extra statistics\n"
+ " -h --help display this help\n"
+ " \nzlib-specific options:\n"
+ " -o NAME\n"
+ " --original-name NAME use NAME as the original file name\n"
+ " -k --quirk QUIRK enable a format quirk (buggy-bsd, ntfs)\n"
+ " -s --osflag set the OS flag to something different than 03 (Unix)\n",
+ "gzip");
+ exit(0);
+}
+
+/* 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);
+}
+
+/* display the version of NetBSD gzip */
+static void
+display_version(void)
+{
+
+ fprintf(stderr, "%s\n", gzip_version);
+ exit(0);
+}
projects / tools / pristine-tar.git / commitdiff