summaryrefslogtreecommitdiff
path: root/archival/gunzip.c
diff options
context:
space:
mode:
authorDenis Vlasenko2007-03-07 22:02:23 +0000
committerDenis Vlasenko2007-03-07 22:02:23 +0000
commitab9eef21a57c23567505e8fbceb8e5ea76306ce1 (patch)
tree800845b64d0e9a204743656c4d267cc6c9917cde /archival/gunzip.c
parent8e858e2700651a0e973169b579622cd3dcd0defd (diff)
downloadbusybox-ab9eef21a57c23567505e8fbceb8e5ea76306ce1.zip
busybox-ab9eef21a57c23567505e8fbceb8e5ea76306ce1.tar.gz
bunzip2/gunzip/uncompress/unlzma: merge into common code -
fix few corner cases, reduce size by 450 bytes. Update testsuite.
Diffstat (limited to 'archival/gunzip.c')
-rw-r--r--archival/gunzip.c163
1 files changed, 0 insertions, 163 deletions
diff --git a/archival/gunzip.c b/archival/gunzip.c
deleted file mode 100644
index 3d99fe5..0000000
--- a/archival/gunzip.c
+++ /dev/null
@@ -1,163 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Gzip implementation for busybox
- *
- * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
- *
- * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
- * based on gzip sources
- *
- * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
- * well as stdin/stdout, and to generally behave itself wrt command line
- * handling.
- *
- * General cleanup to better adhere to the style guide and make use of standard
- * busybox functions by Glenn McGrath <bug1@iinet.net.au>
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- *
- * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * The unzip code was written and put in the public domain by Mark Adler.
- * Portions of the lzw code are derived from the public domain 'compress'
- * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
- * Ken Turkowski, Dave Mack and Peter Jannesen.
- *
- * See the license_msg below and the file COPYING for the software license.
- * See the file algorithm.doc for the compression algorithms and file formats.
- */
-
-#include "busybox.h"
-#include "unarchive.h"
-
-#define GUNZIP_OPT_STDOUT 1
-#define GUNZIP_OPT_FORCE 2
-#define GUNZIP_OPT_TEST 4
-#define GUNZIP_OPT_DECOMPRESS 8
-#define GUNZIP_OPT_VERBOSE 0x10
-
-int gunzip_main(int argc, char **argv);
-int gunzip_main(int argc, char **argv)
-{
- USE_DESKTOP(long long) int status;
- int exitcode = 0;
- unsigned opt;
-
- opt = getopt32(argc, argv, "cftdv");
- /* if called as zcat */
- if (strcmp(applet_name, "zcat") == 0) {
- opt |= GUNZIP_OPT_STDOUT;
- }
-
- do {
- struct stat stat_buf;
- char *old_path = argv[optind];
- char *delete_path = NULL;
- char *new_path = NULL;
- int src_fd;
- int dst_fd;
-
- optind++;
-
- if (old_path == NULL || LONE_DASH(old_path)) {
- src_fd = STDIN_FILENO;
- opt |= GUNZIP_OPT_STDOUT;
- USE_DESKTOP(opt &= ~GUNZIP_OPT_VERBOSE;)
- optind = argc; /* we don't handle "gunzip - a.gz b.gz" */
- } else {
- src_fd = xopen(old_path, O_RDONLY);
- /* Get the time stamp on the input file. */
- fstat(src_fd, &stat_buf);
- }
-
- /* Check that the input is sane. */
- if (isatty(src_fd) && !(opt & GUNZIP_OPT_FORCE)) {
- bb_error_msg_and_die
- ("compressed data not read from terminal, use -f to force it");
- }
-
- /* Set output filename and number */
- if (opt & GUNZIP_OPT_TEST) {
- dst_fd = xopen(bb_dev_null, O_WRONLY); /* why does test use filenum 2 ? */
- } else if (opt & GUNZIP_OPT_STDOUT) {
- dst_fd = STDOUT_FILENO;
- } else {
- char *extension;
-
- new_path = xstrdup(old_path);
-
- extension = strrchr(new_path, '.');
-#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
- if (extension && (strcmp(extension, ".Z") == 0)) {
- *extension = '\0';
- } else
-#endif
- if (extension && (strcmp(extension, ".gz") == 0)) {
- *extension = '\0';
- } else if (extension && (strcmp(extension, ".tgz") == 0)) {
- extension[2] = 'a';
- extension[3] = 'r';
- } else {
- // FIXME: should we die or just skip to next?
- bb_error_msg_and_die("invalid extension");
- }
-
- /* Open output file (with correct permissions) */
- dst_fd = xopen3(new_path, O_WRONLY | O_CREAT | O_TRUNC,
- stat_buf.st_mode);
-
- /* If unzip succeeds remove the old file */
- delete_path = old_path;
- }
-
- status = -1;
- /* do the decompression, and cleanup */
- if (xread_char(src_fd) == 0x1f) {
- unsigned char magic2;
-
- magic2 = xread_char(src_fd);
- if (ENABLE_FEATURE_GUNZIP_UNCOMPRESS && magic2 == 0x9d) {
- status = uncompress(src_fd, dst_fd);
- } else if (magic2 == 0x8b) {
- check_header_gzip(src_fd); // FIXME: xfunc? _or_die?
- status = inflate_gunzip(src_fd, dst_fd);
- } else {
- bb_error_msg("invalid magic");
- exitcode = 1;
- }
- if (status < 0) {
- bb_error_msg("error inflating");
- exitcode = 1;
- }
- else if (ENABLE_DESKTOP && (opt & GUNZIP_OPT_VERBOSE)) {
- fprintf(stderr, "%s: %u%% - replaced with %s\n",
- old_path, (unsigned)(stat_buf.st_size*100 / (status+1)), new_path);
- }
- } else {
- bb_error_msg("invalid magic");
- exitcode = 1;
- }
- if (status < 0 && new_path) {
- /* Unzip failed, remove new path instead of old path */
- delete_path = new_path;
- }
-
- if (dst_fd != STDOUT_FILENO) {
- close(dst_fd);
- }
- if (src_fd != STDIN_FILENO) {
- close(src_fd);
- }
-
- /* delete_path will be NULL if in test mode or from stdin */
- if (delete_path && (unlink(delete_path) == -1)) {
- bb_error_msg("cannot remove %s", delete_path);
- exitcode = 1;
- }
-
- free(new_path);
-
- } while (optind < argc);
-
- return exitcode;
-}