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function old new delta bbunpack 634 731 +97 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
477 lines
13 KiB
C
477 lines
13 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Common code for gunzip-like applets
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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#include "bb_archive.h"
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/* Note: must be kept in sync with archival/lzop.c */
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enum {
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OPT_STDOUT = 1 << 0,
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OPT_FORCE = 1 << 1,
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/* only some decompressors: */
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OPT_VERBOSE = 1 << 2,
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OPT_QUIET = 1 << 3,
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OPT_DECOMPRESS = 1 << 4,
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OPT_TEST = 1 << 5,
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SEAMLESS_MAGIC = (1 << 31) * SEAMLESS_COMPRESSION,
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};
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static
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int open_to_or_warn(int to_fd, const char *filename, int flags, int mode)
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{
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int fd = open3_or_warn(filename, flags, mode);
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if (fd < 0) {
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return 1;
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}
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xmove_fd(fd, to_fd);
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return 0;
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}
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char* FAST_FUNC append_ext(char *filename, const char *expected_ext)
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{
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return xasprintf("%s.%s", filename, expected_ext);
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}
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int FAST_FUNC bbunpack(char **argv,
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IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_aux_data_t *aux),
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char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
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const char *expected_ext
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)
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{
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struct stat stat_buf;
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IF_DESKTOP(long long) int status = 0;
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char *filename, *new_name;
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smallint exitcode = 0;
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transformer_aux_data_t aux;
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do {
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/* NB: new_name is *maybe* malloc'ed! */
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new_name = NULL;
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filename = *argv; /* can be NULL - 'streaming' bunzip2 */
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if (filename && LONE_DASH(filename))
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filename = NULL;
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/* Open src */
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if (filename) {
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if (!(option_mask32 & SEAMLESS_MAGIC)) {
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if (stat(filename, &stat_buf) != 0) {
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err_name:
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bb_simple_perror_msg(filename);
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err:
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exitcode = 1;
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goto free_name;
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}
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if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0))
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goto err;
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} else {
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/* "clever zcat" with FILE */
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int fd = open_zipped(filename);
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if (fd < 0)
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goto err_name;
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xmove_fd(fd, STDIN_FILENO);
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}
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} else
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if (option_mask32 & SEAMLESS_MAGIC) {
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/* "clever zcat" on stdin */
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if (setup_unzip_on_fd(STDIN_FILENO, /*fail_if_not_detected*/ 0))
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goto err;
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}
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/* Special cases: test, stdout */
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if (option_mask32 & (OPT_STDOUT|OPT_TEST)) {
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if (option_mask32 & OPT_TEST)
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if (open_to_or_warn(STDOUT_FILENO, bb_dev_null, O_WRONLY, 0))
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xfunc_die();
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filename = NULL;
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}
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/* Open dst if we are going to unpack to file */
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if (filename) {
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new_name = make_new_name(filename, expected_ext);
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if (!new_name) {
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bb_error_msg("%s: unknown suffix - ignored", filename);
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goto err;
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}
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/* -f: overwrite existing output files */
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if (option_mask32 & OPT_FORCE) {
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unlink(new_name);
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}
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/* O_EXCL: "real" bunzip2 doesn't overwrite files */
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/* GNU gunzip does not bail out, but goes to next file */
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if (open_to_or_warn(STDOUT_FILENO, new_name, O_WRONLY | O_CREAT | O_EXCL,
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stat_buf.st_mode))
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goto err;
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}
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/* Check that the input is sane */
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if (!(option_mask32 & OPT_FORCE) && isatty(STDIN_FILENO)) {
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bb_error_msg_and_die("compressed data not read from terminal, "
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"use -f to force it");
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}
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if (!(option_mask32 & SEAMLESS_MAGIC)) {
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init_transformer_aux_data(&aux);
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aux.check_signature = 1;
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status = unpacker(&aux);
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if (status < 0)
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exitcode = 1;
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} else {
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if (bb_copyfd_eof(STDIN_FILENO, STDOUT_FILENO) < 0)
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/* Disk full, tty closed, etc. No point in continuing */
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xfunc_die();
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}
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if (!(option_mask32 & OPT_STDOUT))
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xclose(STDOUT_FILENO); /* with error check! */
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if (filename) {
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char *del = new_name;
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if (status >= 0) {
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unsigned new_name_len;
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/* TODO: restore other things? */
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if (aux.mtime != 0) {
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struct timeval times[2];
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times[1].tv_sec = times[0].tv_sec = aux.mtime;
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times[1].tv_usec = times[0].tv_usec = 0;
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/* Note: we closed it first.
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* On some systems calling utimes
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* then closing resets the mtime
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* back to current time. */
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utimes(new_name, times); /* ignoring errors */
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}
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if (ENABLE_DESKTOP)
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new_name_len = strlen(new_name);
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/* Restore source filename (unless tgz -> tar case) */
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if (new_name == filename) {
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new_name_len = strlen(filename);
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filename[new_name_len] = '.';
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}
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/* Extreme bloat for gunzip compat */
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/* Some users do want this info... */
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if (ENABLE_DESKTOP && (option_mask32 & OPT_VERBOSE)) {
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unsigned percent = status
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? ((uoff_t)stat_buf.st_size * 100u / (unsigned long long)status)
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: 0;
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fprintf(stderr, "%s: %u%% - replaced with %.*s\n",
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filename,
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100u - percent,
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new_name_len, new_name
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);
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}
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/* Delete _source_ file */
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del = filename;
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}
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xunlink(del);
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free_name:
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if (new_name != filename)
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free(new_name);
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}
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} while (*argv && *++argv);
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if (option_mask32 & OPT_STDOUT)
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xclose(STDOUT_FILENO); /* with error check! */
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return exitcode;
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}
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#if ENABLE_UNCOMPRESS || ENABLE_BUNZIP2 || ENABLE_UNLZMA || ENABLE_UNXZ
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static
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char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
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{
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char *extension = strrchr(filename, '.');
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if (!extension || strcmp(extension + 1, expected_ext) != 0) {
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/* Mimic GNU gunzip - "real" bunzip2 tries to */
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/* unpack file anyway, to file.out */
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return NULL;
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}
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*extension = '\0';
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return filename;
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}
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#endif
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/*
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* Uncompress applet for busybox (c) 2002 Glenn McGrath
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//usage:#define uncompress_trivial_usage
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//usage: "[-cf] [FILE]..."
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//usage:#define uncompress_full_usage "\n\n"
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//usage: "Decompress .Z file[s]\n"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Overwrite"
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#if ENABLE_UNCOMPRESS
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(transformer_aux_data_t *aux)
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{
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return unpack_Z_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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}
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int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int uncompress_main(int argc UNUSED_PARAM, char **argv)
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{
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getopt32(argv, "cf");
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argv += optind;
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return bbunpack(argv, unpack_uncompress, make_new_name_generic, "Z");
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}
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#endif
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/*
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* Gzip implementation for busybox
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*
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* Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
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*
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* Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
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* based on gzip sources
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*
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* Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
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* well as stdin/stdout, and to generally behave itself wrt command line
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* handling.
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*
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* General cleanup to better adhere to the style guide and make use of standard
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* busybox functions by Glenn McGrath
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*
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* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
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* Copyright (C) 1992-1993 Jean-loup Gailly
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* The unzip code was written and put in the public domain by Mark Adler.
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* Portions of the lzw code are derived from the public domain 'compress'
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* written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
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* Ken Turkowski, Dave Mack and Peter Jannesen.
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*
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* See the license_msg below and the file COPYING for the software license.
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* See the file algorithm.doc for the compression algorithms and file formats.
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*/
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//usage:#define gunzip_trivial_usage
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//usage: "[-cft] [FILE]..."
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//usage:#define gunzip_full_usage "\n\n"
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//usage: "Decompress FILEs (or stdin)\n"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Force"
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//usage: "\n -t Test file integrity"
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//usage:
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//usage:#define gunzip_example_usage
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//usage: "$ ls -la /tmp/BusyBox*\n"
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//usage: "-rw-rw-r-- 1 andersen andersen 557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n"
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//usage: "$ gunzip /tmp/BusyBox-0.43.tar.gz\n"
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//usage: "$ ls -la /tmp/BusyBox*\n"
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//usage: "-rw-rw-r-- 1 andersen andersen 1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n"
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//usage:
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//usage:#define zcat_trivial_usage
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//usage: "[FILE]..."
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//usage:#define zcat_full_usage "\n\n"
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//usage: "Decompress to stdout"
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#if ENABLE_GUNZIP
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static
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char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
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{
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char *extension = strrchr(filename, '.');
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if (!extension)
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return NULL;
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extension++;
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if (strcmp(extension, "tgz" + 1) == 0
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#if ENABLE_FEATURE_SEAMLESS_Z
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|| (extension[0] == 'Z' && extension[1] == '\0')
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#endif
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) {
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extension[-1] = '\0';
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} else if (strcmp(extension, "tgz") == 0) {
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filename = xstrdup(filename);
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extension = strrchr(filename, '.');
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extension[2] = 'a';
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extension[3] = 'r';
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} else {
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return NULL;
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}
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return filename;
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}
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(transformer_aux_data_t *aux)
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{
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return unpack_gz_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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}
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/*
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* Linux kernel build uses gzip -d -n. We accept and ignore it.
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* Man page says:
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* -n --no-name
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* gzip: do not save the original file name and time stamp.
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* (The original name is always saved if the name had to be truncated.)
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* gunzip: do not restore the original file name/time even if present
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* (remove only the gzip suffix from the compressed file name).
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* This option is the default when decompressing.
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* -N --name
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* gzip: always save the original file name and time stamp (this is the default)
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* gunzip: restore the original file name and time stamp if present.
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*/
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int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int gunzip_main(int argc UNUSED_PARAM, char **argv)
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{
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getopt32(argv, "cfvqdtn");
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argv += optind;
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/* If called as zcat...
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* Normally, "zcat" is just "gunzip -c".
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* But if seamless magic is enabled, then we are much more clever.
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*/
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if (applet_name[1] == 'c')
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option_mask32 |= OPT_STDOUT | SEAMLESS_MAGIC;
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return bbunpack(argv, unpack_gunzip, make_new_name_gunzip, /*unused:*/ NULL);
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}
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#endif
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/*
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* Modified for busybox by Glenn McGrath
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* Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//usage:#define bunzip2_trivial_usage
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//usage: "[-cf] [FILE]..."
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//usage:#define bunzip2_full_usage "\n\n"
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//usage: "Decompress FILEs (or stdin)\n"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Force"
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//usage:#define bzcat_trivial_usage
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//usage: "[FILE]..."
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//usage:#define bzcat_full_usage "\n\n"
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//usage: "Decompress to stdout"
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//applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
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//applet:IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
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#if ENABLE_BUNZIP2
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(transformer_aux_data_t *aux)
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{
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return unpack_bz2_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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}
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int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int bunzip2_main(int argc UNUSED_PARAM, char **argv)
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{
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getopt32(argv, "cfvqdt");
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argv += optind;
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if (applet_name[2] == 'c') /* bzcat */
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option_mask32 |= OPT_STDOUT;
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return bbunpack(argv, unpack_bunzip2, make_new_name_generic, "bz2");
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}
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#endif
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/*
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* Small lzma deflate implementation.
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* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
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*
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* Based on bunzip.c from busybox
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//usage:#define unlzma_trivial_usage
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//usage: "[-cf] [FILE]..."
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//usage:#define unlzma_full_usage "\n\n"
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//usage: "Decompress FILE (or stdin)\n"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Force"
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//usage:
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//usage:#define lzma_trivial_usage
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//usage: "-d [-cf] [FILE]..."
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//usage:#define lzma_full_usage "\n\n"
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//usage: "Decompress FILE (or stdin)\n"
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//usage: "\n -d Decompress"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Force"
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//usage:
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//usage:#define lzcat_trivial_usage
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//usage: "[FILE]..."
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//usage:#define lzcat_full_usage "\n\n"
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//usage: "Decompress to stdout"
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//usage:
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//usage:#define unxz_trivial_usage
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//usage: "[-cf] [FILE]..."
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//usage:#define unxz_full_usage "\n\n"
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//usage: "Decompress FILE (or stdin)\n"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Force"
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//usage:
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//usage:#define xz_trivial_usage
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//usage: "-d [-cf] [FILE]..."
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//usage:#define xz_full_usage "\n\n"
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//usage: "Decompress FILE (or stdin)\n"
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//usage: "\n -d Decompress"
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//usage: "\n -c Write to stdout"
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//usage: "\n -f Force"
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//usage:
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//usage:#define xzcat_trivial_usage
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//usage: "[FILE]..."
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//usage:#define xzcat_full_usage "\n\n"
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//usage: "Decompress to stdout"
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#if ENABLE_UNLZMA
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(transformer_aux_data_t *aux)
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{
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return unpack_lzma_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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}
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int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int unlzma_main(int argc UNUSED_PARAM, char **argv)
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{
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IF_LZMA(int opts =) getopt32(argv, "cfvqdt");
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# if ENABLE_LZMA
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/* lzma without -d or -t? */
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if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
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bb_show_usage();
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# endif
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/* lzcat? */
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if (applet_name[2] == 'c')
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option_mask32 |= OPT_STDOUT;
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argv += optind;
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return bbunpack(argv, unpack_unlzma, make_new_name_generic, "lzma");
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}
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#endif
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#if ENABLE_UNXZ
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(transformer_aux_data_t *aux)
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{
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return unpack_xz_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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}
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int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int unxz_main(int argc UNUSED_PARAM, char **argv)
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{
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IF_XZ(int opts =) getopt32(argv, "cfvqdt");
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# if ENABLE_XZ
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/* xz without -d or -t? */
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if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
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bb_show_usage();
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# endif
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/* xzcat? */
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if (applet_name[2] == 'c')
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option_mask32 |= OPT_STDOUT;
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argv += optind;
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return bbunpack(argv, unpack_unxz, make_new_name_generic, "xz");
|
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}
|
|
#endif
|