diff options
Diffstat (limited to 'archival/gunzip.c')
| -rw-r--r-- | archival/gunzip.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/archival/gunzip.c b/archival/gunzip.c deleted file mode 100644 index 3d99fe506..000000000 --- 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; -} |