627 lines
20 KiB
C
627 lines
20 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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//kbuild:lib-$(CONFIG_ZCAT) += bbunzip.o
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//kbuild:lib-$(CONFIG_GUNZIP) += bbunzip.o
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//kbuild:lib-$(CONFIG_BZCAT) += bbunzip.o
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//kbuild:lib-$(CONFIG_BUNZIP2) += bbunzip.o
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/* lzop_main() uses bbunpack(), need this: */
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//kbuild:lib-$(CONFIG_LZOP) += bbunzip.o
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//kbuild:lib-$(CONFIG_LZOPCAT) += bbunzip.o
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//kbuild:lib-$(CONFIG_UNLZOP) += bbunzip.o
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/* bzip2_main() too: */
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//kbuild:lib-$(CONFIG_BZIP2) += bbunzip.o
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/* gzip_main() too: */
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//kbuild:lib-$(CONFIG_GZIP) += bbunzip.o
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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_KEEP = 1 << 2,
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OPT_VERBOSE = 1 << 3,
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OPT_QUIET = 1 << 4,
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OPT_DECOMPRESS = 1 << 5,
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OPT_TEST = 1 << 6,
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SEAMLESS_MAGIC = (1 << 31) * ENABLE_ZCAT * 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_state_t *xstate),
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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_state_t xstate;
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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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/* fail_if_not_compressed because zcat refuses uncompressed input */
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int fd = open_zipped(filename, /*fail_if_not_compressed:*/ 1);
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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_compressed*/ 1))
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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_state(&xstate);
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/*xstate.signature_skipped = 0; - already is */
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/*xstate.src_fd = STDIN_FILENO; - already is */
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xstate.dst_fd = STDOUT_FILENO;
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status = unpacker(&xstate);
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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 (xstate.mtime != 0) {
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struct timeval times[2];
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times[1].tv_sec = times[0].tv_sec = xstate.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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if (option_mask32 & OPT_KEEP) /* ... unless -k */
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del = NULL;
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}
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if (del)
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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 \
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|| ENABLE_FEATURE_BZIP2_DECOMPRESS \
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|| ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA \
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|| ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
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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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//config:config UNCOMPRESS
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//config: bool "uncompress (7.1 kb)"
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//config: default n # ancient
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//config: help
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//config: uncompress is used to decompress archives created by compress.
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//config: Not much used anymore, replaced by gzip/gunzip.
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//applet:IF_UNCOMPRESS(APPLET(uncompress, BB_DIR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_UNCOMPRESS) += bbunzip.o
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#if ENABLE_UNCOMPRESS
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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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// (N)compress 4.2.4.4:
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// -d If given, decompression is done instead
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// -c Write output on stdout, don't remove original
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// -b Parameter limits the max number of bits/code
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// -f Forces output file to be generated
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// -v Write compression statistics
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// -V Output vesion and compile options
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// -r Recursive. If a filename is a directory, descend into it and compress everything
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getopt32(argv, "cf");
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argv += optind;
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return bbunpack(argv, unpack_Z_stream, 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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//usage:#define gunzip_trivial_usage
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//usage: "[-cfkt] [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 -k Keep input files"
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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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//config:config GUNZIP
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//config: bool "gunzip (12 kb)"
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//config: default y
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//config: select FEATURE_GZIP_DECOMPRESS
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//config: help
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//config: gunzip is used to decompress archives created by gzip.
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//config: You can use the `-t' option to test the integrity of
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//config: an archive, without decompressing it.
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//config:
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//config:config ZCAT
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//config: bool "zcat (25 kb)"
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//config: default y
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//config: select FEATURE_GZIP_DECOMPRESS
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//config: help
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//config: Alias to "gunzip -c".
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//config:
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//config:config FEATURE_GUNZIP_LONG_OPTIONS
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//config: bool "Enable long options"
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//config: default y
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//config: depends on (GUNZIP || ZCAT) && LONG_OPTS
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//applet:IF_GUNZIP(APPLET(gunzip, BB_DIR_BIN, BB_SUID_DROP))
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// APPLET_ODDNAME:name main location suid_type help
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//applet:IF_ZCAT(APPLET_ODDNAME(zcat, gunzip, BB_DIR_BIN, BB_SUID_DROP, zcat))
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#if ENABLE_FEATURE_GZIP_DECOMPRESS
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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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#if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS
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static const char gunzip_longopts[] ALIGN1 =
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"stdout\0" No_argument "c"
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"to-stdout\0" No_argument "c"
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"force\0" No_argument "f"
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"test\0" No_argument "t"
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"no-name\0" No_argument "n"
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;
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#endif
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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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#if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS
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applet_long_options = gunzip_longopts;
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#endif
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getopt32(argv, "cfkvqdtn");
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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 (ENABLE_ZCAT && (!ENABLE_GUNZIP || applet_name[1] == 'c'))
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option_mask32 |= OPT_STDOUT | SEAMLESS_MAGIC;
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return bbunpack(argv, unpack_gz_stream, make_new_name_gunzip, /*unused:*/ NULL);
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}
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#endif /* FEATURE_GZIP_DECOMPRESS */
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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: "[-cfk] [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: "\n -k Keep input files"
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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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//config:config BUNZIP2
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//config: bool "bunzip2 (8.8 kb)"
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//config: default y
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//config: select FEATURE_BZIP2_DECOMPRESS
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//config: help
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//config: bunzip2 is a compression utility using the Burrows-Wheeler block
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//config: sorting text compression algorithm, and Huffman coding. Compression
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//config: is generally considerably better than that achieved by more
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//config: conventional LZ77/LZ78-based compressors, and approaches the
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//config: performance of the PPM family of statistical compressors.
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//config:
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//config: Unless you have a specific application which requires bunzip2, you
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//config: should probably say N here.
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//config:
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//config:config BZCAT
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//config: bool "bzcat (8.8 kb)"
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//config: default y
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//config: select FEATURE_BZIP2_DECOMPRESS
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//config: help
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//config: Alias to "bunzip2 -c".
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//applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
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// APPLET_ODDNAME:name main location suid_type help
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//applet:IF_BZCAT(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
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#if ENABLE_FEATURE_BZIP2_DECOMPRESS || ENABLE_BUNZIP2 || ENABLE_BZCAT
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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, "cfkvqdt");
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argv += optind;
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if (ENABLE_BZCAT && (!ENABLE_BUNZIP2 || applet_name[2] == 'c')) /* bzcat */
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option_mask32 |= OPT_STDOUT;
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return bbunpack(argv, unpack_bz2_stream, 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: "[-cfk] [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: "\n -k Keep input files"
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//usage:
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//usage:#define lzma_trivial_usage
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//usage: "-d [-cfk] [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: "\n -k Keep input files"
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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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//config:config UNLZMA
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//config: bool "unlzma (8.6 kb)"
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//config: default y
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//config: help
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//config: unlzma is a compression utility using the Lempel-Ziv-Markov chain
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//config: compression algorithm, and range coding. Compression
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//config: is generally considerably better than that achieved by the bzip2
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//config: compressors.
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//config:
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//config: The BusyBox unlzma applet is limited to decompression only.
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//config: On an x86 system, this applet adds about 4K.
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//config:
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//config:config LZCAT
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//config: bool "lzcat (8.5 kb)"
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//config: default y
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//config: help
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//config: unlzma is a compression utility using the Lempel-Ziv-Markov chain
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//config: compression algorithm, and range coding. Compression
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//config: is generally considerably better than that achieved by the bzip2
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//config: compressors.
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//config:
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//config: The BusyBox unlzma applet is limited to decompression only.
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//config: On an x86 system, this applet adds about 4K.
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//config:
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//config:config LZMA
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//config: bool "lzma -d"
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//config: default y
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//config: help
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//config: Enable this option if you want commands like "lzma -d" to work.
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//config: IOW: you'll get lzma applet, but it will always require -d option.
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//config:
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//config:config FEATURE_LZMA_FAST
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//config: bool "Optimize for speed"
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//config: default n
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//config: depends on UNLZMA || LZCAT || LZMA
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//config: help
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//config: This option reduces decompression time by about 25% at the cost of
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//config: a 1K bigger binary.
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//applet:IF_UNLZMA(APPLET(unlzma, BB_DIR_USR_BIN, BB_SUID_DROP))
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// APPLET_ODDNAME:name main location suid_type help
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//applet:IF_LZCAT(APPLET_ODDNAME(lzcat, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzcat))
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//applet:IF_LZMA( APPLET_ODDNAME(lzma, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzma))
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//kbuild:lib-$(CONFIG_UNLZMA) += bbunzip.o
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//kbuild:lib-$(CONFIG_LZCAT) += bbunzip.o
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//kbuild:lib-$(CONFIG_LZMA) += bbunzip.o
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#if ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA
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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, "cfkvqdt");
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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 (ENABLE_LZCAT && 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_lzma_stream, make_new_name_generic, "lzma");
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}
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#endif
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//usage:#define unxz_trivial_usage
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//usage: "[-cfk] [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: "\n -k Keep input files"
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//usage:
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//usage:#define xz_trivial_usage
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//usage: "-d [-cfk] [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: "\n -k Keep input files"
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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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//config:config UNXZ
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//config: bool "unxz (13 kb)"
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//config: default y
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//config: help
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//config: unxz is a unlzma successor.
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//config:
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//config:config XZCAT
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//config: bool "xzcat (13 kb)"
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//config: default y
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//config: help
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//config: Alias to "unxz -c".
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//config:
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//config:config XZ
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//config: bool "xz -d"
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//config: default y
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//config: help
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//config: Enable this option if you want commands like "xz -d" to work.
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//config: IOW: you'll get xz applet, but it will always require -d option.
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//applet:IF_UNXZ(APPLET(unxz, BB_DIR_USR_BIN, BB_SUID_DROP))
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// APPLET_ODDNAME:name main location suid_type help
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//applet:IF_XZCAT(APPLET_ODDNAME(xzcat, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xzcat))
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//applet:IF_XZ( APPLET_ODDNAME(xz, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xz))
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//kbuild:lib-$(CONFIG_UNXZ) += bbunzip.o
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//kbuild:lib-$(CONFIG_XZCAT) += bbunzip.o
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//kbuild:lib-$(CONFIG_XZ) += bbunzip.o
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#if ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
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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, "cfkvqdt");
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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 (ENABLE_XZCAT && 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_xz_stream, make_new_name_generic, "xz");
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}
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#endif
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