da52b4caaf
is in accordance with the information provided at ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change Also add $FreeBSD$ to a few files to keep svn happy. Discussed with: imp, rwatson
437 lines
9.4 KiB
C
437 lines
9.4 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char copyright[] =
|
|
"@(#) Copyright (c) 1992, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif
|
|
|
|
#if 0
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)compress.c 8.2 (Berkeley) 1/7/94";
|
|
#endif
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "zopen.h"
|
|
|
|
void compress(const char *, const char *, int);
|
|
void cwarn(const char *, ...) __printflike(1, 2);
|
|
void cwarnx(const char *, ...) __printflike(1, 2);
|
|
void decompress(const char *, const char *, int);
|
|
int permission(const char *);
|
|
void setfile(const char *, struct stat *);
|
|
void usage(int);
|
|
|
|
int eval, force, verbose;
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
enum {COMPRESS, DECOMPRESS} style;
|
|
size_t len;
|
|
int bits, cat, ch;
|
|
char *p, newname[MAXPATHLEN];
|
|
|
|
cat = 0;
|
|
if ((p = rindex(argv[0], '/')) == NULL)
|
|
p = argv[0];
|
|
else
|
|
++p;
|
|
if (!strcmp(p, "uncompress"))
|
|
style = DECOMPRESS;
|
|
else if (!strcmp(p, "compress"))
|
|
style = COMPRESS;
|
|
else if (!strcmp(p, "zcat")) {
|
|
cat = 1;
|
|
style = DECOMPRESS;
|
|
} else
|
|
errx(1, "unknown program name");
|
|
|
|
bits = 0;
|
|
while ((ch = getopt(argc, argv, "b:cdfv")) != -1)
|
|
switch(ch) {
|
|
case 'b':
|
|
bits = strtol(optarg, &p, 10);
|
|
if (*p)
|
|
errx(1, "illegal bit count -- %s", optarg);
|
|
break;
|
|
case 'c':
|
|
cat = 1;
|
|
break;
|
|
case 'd': /* Backward compatible. */
|
|
style = DECOMPRESS;
|
|
break;
|
|
case 'f':
|
|
force = 1;
|
|
break;
|
|
case 'v':
|
|
verbose = 1;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage(style == COMPRESS);
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc == 0) {
|
|
switch(style) {
|
|
case COMPRESS:
|
|
(void)compress("/dev/stdin", "/dev/stdout", bits);
|
|
break;
|
|
case DECOMPRESS:
|
|
(void)decompress("/dev/stdin", "/dev/stdout", bits);
|
|
break;
|
|
}
|
|
exit (eval);
|
|
}
|
|
|
|
if (cat == 1 && argc > 1)
|
|
errx(1, "the -c option permits only a single file argument");
|
|
|
|
for (; *argv; ++argv)
|
|
switch(style) {
|
|
case COMPRESS:
|
|
if (strcmp(*argv, "-") == 0) {
|
|
compress("/dev/stdin", "/dev/stdout", bits);
|
|
break;
|
|
} else if (cat) {
|
|
compress(*argv, "/dev/stdout", bits);
|
|
break;
|
|
}
|
|
if ((p = rindex(*argv, '.')) != NULL &&
|
|
!strcmp(p, ".Z")) {
|
|
cwarnx("%s: name already has trailing .Z",
|
|
*argv);
|
|
break;
|
|
}
|
|
len = strlen(*argv);
|
|
if (len > sizeof(newname) - 3) {
|
|
cwarnx("%s: name too long", *argv);
|
|
break;
|
|
}
|
|
memmove(newname, *argv, len);
|
|
newname[len] = '.';
|
|
newname[len + 1] = 'Z';
|
|
newname[len + 2] = '\0';
|
|
compress(*argv, newname, bits);
|
|
break;
|
|
case DECOMPRESS:
|
|
if (strcmp(*argv, "-") == 0) {
|
|
decompress("/dev/stdin", "/dev/stdout", bits);
|
|
break;
|
|
}
|
|
len = strlen(*argv);
|
|
if ((p = rindex(*argv, '.')) == NULL ||
|
|
strcmp(p, ".Z")) {
|
|
if (len > sizeof(newname) - 3) {
|
|
cwarnx("%s: name too long", *argv);
|
|
break;
|
|
}
|
|
memmove(newname, *argv, len);
|
|
newname[len] = '.';
|
|
newname[len + 1] = 'Z';
|
|
newname[len + 2] = '\0';
|
|
decompress(newname,
|
|
cat ? "/dev/stdout" : *argv, bits);
|
|
} else {
|
|
if (len - 2 > sizeof(newname) - 1) {
|
|
cwarnx("%s: name too long", *argv);
|
|
break;
|
|
}
|
|
memmove(newname, *argv, len - 2);
|
|
newname[len - 2] = '\0';
|
|
decompress(*argv,
|
|
cat ? "/dev/stdout" : newname, bits);
|
|
}
|
|
break;
|
|
}
|
|
exit (eval);
|
|
}
|
|
|
|
void
|
|
compress(const char *in, const char *out, int bits)
|
|
{
|
|
size_t nr;
|
|
struct stat isb, sb;
|
|
FILE *ifp, *ofp;
|
|
int exists, isreg, oreg;
|
|
u_char buf[1024];
|
|
|
|
exists = !stat(out, &sb);
|
|
if (!force && exists && S_ISREG(sb.st_mode) && !permission(out))
|
|
return;
|
|
isreg = oreg = !exists || S_ISREG(sb.st_mode);
|
|
|
|
ifp = ofp = NULL;
|
|
if ((ifp = fopen(in, "r")) == NULL) {
|
|
cwarn("%s", in);
|
|
return;
|
|
}
|
|
if (stat(in, &isb)) { /* DON'T FSTAT! */
|
|
cwarn("%s", in);
|
|
goto err;
|
|
}
|
|
if (!S_ISREG(isb.st_mode))
|
|
isreg = 0;
|
|
|
|
if ((ofp = zopen(out, "w", bits)) == NULL) {
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
while ((nr = fread(buf, 1, sizeof(buf), ifp)) != 0)
|
|
if (fwrite(buf, 1, nr, ofp) != nr) {
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
|
|
if (ferror(ifp) || fclose(ifp)) {
|
|
cwarn("%s", in);
|
|
goto err;
|
|
}
|
|
ifp = NULL;
|
|
|
|
if (fclose(ofp)) {
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
ofp = NULL;
|
|
|
|
if (isreg) {
|
|
if (stat(out, &sb)) {
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
|
|
if (!force && sb.st_size >= isb.st_size) {
|
|
if (verbose)
|
|
(void)fprintf(stderr, "%s: file would grow; left unmodified\n",
|
|
in);
|
|
eval = 2;
|
|
if (unlink(out))
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
|
|
setfile(out, &isb);
|
|
|
|
if (unlink(in))
|
|
cwarn("%s", in);
|
|
|
|
if (verbose) {
|
|
(void)fprintf(stderr, "%s: ", out);
|
|
if (isb.st_size > sb.st_size)
|
|
(void)fprintf(stderr, "%.0f%% compression\n",
|
|
((float)sb.st_size / isb.st_size) * 100.0);
|
|
else
|
|
(void)fprintf(stderr, "%.0f%% expansion\n",
|
|
((float)isb.st_size / sb.st_size) * 100.0);
|
|
}
|
|
}
|
|
return;
|
|
|
|
err: if (ofp) {
|
|
if (oreg)
|
|
(void)unlink(out);
|
|
(void)fclose(ofp);
|
|
}
|
|
if (ifp)
|
|
(void)fclose(ifp);
|
|
}
|
|
|
|
void
|
|
decompress(const char *in, const char *out, int bits)
|
|
{
|
|
size_t nr;
|
|
struct stat sb;
|
|
FILE *ifp, *ofp;
|
|
int exists, isreg, oreg;
|
|
u_char buf[1024];
|
|
|
|
exists = !stat(out, &sb);
|
|
if (!force && exists && S_ISREG(sb.st_mode) && !permission(out))
|
|
return;
|
|
isreg = oreg = !exists || S_ISREG(sb.st_mode);
|
|
|
|
ifp = ofp = NULL;
|
|
if ((ifp = zopen(in, "r", bits)) == NULL) {
|
|
cwarn("%s", in);
|
|
return;
|
|
}
|
|
if (stat(in, &sb)) {
|
|
cwarn("%s", in);
|
|
goto err;
|
|
}
|
|
if (!S_ISREG(sb.st_mode))
|
|
isreg = 0;
|
|
|
|
/*
|
|
* Try to read the first few uncompressed bytes from the input file
|
|
* before blindly truncating the output file.
|
|
*/
|
|
if ((nr = fread(buf, 1, sizeof(buf), ifp)) == 0) {
|
|
cwarn("%s", in);
|
|
(void)fclose(ifp);
|
|
return;
|
|
}
|
|
if ((ofp = fopen(out, "w")) == NULL ||
|
|
(nr != 0 && fwrite(buf, 1, nr, ofp) != nr)) {
|
|
cwarn("%s", out);
|
|
(void)fclose(ifp);
|
|
return;
|
|
}
|
|
|
|
while ((nr = fread(buf, 1, sizeof(buf), ifp)) != 0)
|
|
if (fwrite(buf, 1, nr, ofp) != nr) {
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
|
|
if (ferror(ifp) || fclose(ifp)) {
|
|
cwarn("%s", in);
|
|
goto err;
|
|
}
|
|
ifp = NULL;
|
|
|
|
if (fclose(ofp)) {
|
|
cwarn("%s", out);
|
|
goto err;
|
|
}
|
|
|
|
if (isreg) {
|
|
setfile(out, &sb);
|
|
|
|
if (unlink(in))
|
|
cwarn("%s", in);
|
|
}
|
|
return;
|
|
|
|
err: if (ofp) {
|
|
if (oreg)
|
|
(void)unlink(out);
|
|
(void)fclose(ofp);
|
|
}
|
|
if (ifp)
|
|
(void)fclose(ifp);
|
|
}
|
|
|
|
void
|
|
setfile(const char *name, struct stat *fs)
|
|
{
|
|
static struct timeval tv[2];
|
|
|
|
fs->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
|
|
|
|
TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atim);
|
|
TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtim);
|
|
if (utimes(name, tv))
|
|
cwarn("utimes: %s", name);
|
|
|
|
/*
|
|
* Changing the ownership probably won't succeed, unless we're root
|
|
* or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
|
|
* the mode; current BSD behavior is to remove all setuid bits on
|
|
* chown. If chown fails, lose setuid/setgid bits.
|
|
*/
|
|
if (chown(name, fs->st_uid, fs->st_gid)) {
|
|
if (errno != EPERM)
|
|
cwarn("chown: %s", name);
|
|
fs->st_mode &= ~(S_ISUID|S_ISGID);
|
|
}
|
|
if (chmod(name, fs->st_mode) && errno != EOPNOTSUPP)
|
|
cwarn("chmod: %s", name);
|
|
|
|
if (chflags(name, fs->st_flags) && errno != EOPNOTSUPP)
|
|
cwarn("chflags: %s", name);
|
|
}
|
|
|
|
int
|
|
permission(const char *fname)
|
|
{
|
|
int ch, first;
|
|
|
|
if (!isatty(fileno(stderr)))
|
|
return (0);
|
|
(void)fprintf(stderr, "overwrite %s? ", fname);
|
|
first = ch = getchar();
|
|
while (ch != '\n' && ch != EOF)
|
|
ch = getchar();
|
|
return (first == 'y');
|
|
}
|
|
|
|
void
|
|
usage(int iscompress)
|
|
{
|
|
if (iscompress)
|
|
(void)fprintf(stderr,
|
|
"usage: compress [-cfv] [-b bits] [file ...]\n");
|
|
else
|
|
(void)fprintf(stderr,
|
|
"usage: uncompress [-c] [-b bits] [file ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
cwarnx(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vwarnx(fmt, ap);
|
|
va_end(ap);
|
|
eval = 1;
|
|
}
|
|
|
|
void
|
|
cwarn(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vwarn(fmt, ap);
|
|
va_end(ap);
|
|
eval = 1;
|
|
}
|