From b21de46dcbeca497a0256f266f8df175bba925ea Mon Sep 17 00:00:00 2001 From: joeyh Date: Tue, 2 Oct 2007 07:35:19 +0000 Subject: [PATCH] add --- Makefile | 3 + bsd-gzip.c | 2054 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 2057 insertions(+) create mode 100644 Makefile create mode 100644 bsd-gzip.c diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..12db66d --- /dev/null +++ b/Makefile @@ -0,0 +1,3 @@ +bsd-gzip: bsd-gzip.c + gcc -O2 -DNO_COMPRESS_SUPPORT -DNO_BZIP2_SUPPORT -lz \ + -o bsd-gzip bsd-gzip.c diff --git a/bsd-gzip.c b/bsd-gzip.c new file mode 100644 index 0000000..7f20428 --- /dev/null +++ b/bsd-gzip.c @@ -0,0 +1,2054 @@ +/* $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 + +/* + * 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 +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 + +#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 .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 "] [ [ ...]]\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; +} + -- 2.7.4