/* vi: set sw=4 ts=4: */ /* * Common code for gunzip-like applets * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ #include "libbb.h" #include "bb_archive.h" //kbuild:lib-$(CONFIG_ZCAT) += bbunzip.o //kbuild:lib-$(CONFIG_GUNZIP) += bbunzip.o //kbuild:lib-$(CONFIG_BZCAT) += bbunzip.o //kbuild:lib-$(CONFIG_BUNZIP2) += bbunzip.o /* lzop_main() uses bbunpack(), need this: */ //kbuild:lib-$(CONFIG_LZOP) += bbunzip.o //kbuild:lib-$(CONFIG_LZOPCAT) += bbunzip.o //kbuild:lib-$(CONFIG_UNLZOP) += bbunzip.o /* bzip2_main() too: */ //kbuild:lib-$(CONFIG_BZIP2) += bbunzip.o /* gzip_main() too: */ //kbuild:lib-$(CONFIG_GZIP) += bbunzip.o /* Note: must be kept in sync with archival/lzop.c */ enum { OPT_STDOUT = 1 << 0, OPT_FORCE = 1 << 1, /* only some decompressors: */ OPT_KEEP = 1 << 2, OPT_VERBOSE = 1 << 3, OPT_QUIET = 1 << 4, OPT_DECOMPRESS = 1 << 5, OPT_TEST = 1 << 6, SEAMLESS_MAGIC = (1 << 31) * ENABLE_ZCAT * SEAMLESS_COMPRESSION, }; static int open_to_or_warn(int to_fd, const char *filename, int flags, int mode) { int fd = open3_or_warn(filename, flags, mode); if (fd < 0) { return 1; } xmove_fd(fd, to_fd); return 0; } char* FAST_FUNC append_ext(char *filename, const char *expected_ext) { return xasprintf("%s.%s", filename, expected_ext); } int FAST_FUNC bbunpack(char **argv, IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_state_t *xstate), char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext), const char *expected_ext ) { struct stat stat_buf; IF_DESKTOP(long long) int status = 0; char *filename, *new_name; smallint exitcode = 0; transformer_state_t xstate; do { /* NB: new_name is *maybe* malloc'ed! */ new_name = NULL; filename = *argv; /* can be NULL - 'streaming' bunzip2 */ if (filename && LONE_DASH(filename)) filename = NULL; /* Open src */ if (filename) { if (!(option_mask32 & SEAMLESS_MAGIC)) { if (stat(filename, &stat_buf) != 0) { err_name: bb_simple_perror_msg(filename); err: exitcode = 1; goto free_name; } if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0)) goto err; } else { /* "clever zcat" with FILE */ /* fail_if_not_compressed because zcat refuses uncompressed input */ int fd = open_zipped(filename, /*fail_if_not_compressed:*/ 1); if (fd < 0) goto err_name; xmove_fd(fd, STDIN_FILENO); } } else if (option_mask32 & SEAMLESS_MAGIC) { /* "clever zcat" on stdin */ if (setup_unzip_on_fd(STDIN_FILENO, /*fail_if_not_compressed*/ 1)) goto err; } /* Special cases: test, stdout */ if (option_mask32 & (OPT_STDOUT|OPT_TEST)) { if (option_mask32 & OPT_TEST) if (open_to_or_warn(STDOUT_FILENO, bb_dev_null, O_WRONLY, 0)) xfunc_die(); filename = NULL; } /* Open dst if we are going to unpack to file */ if (filename) { new_name = make_new_name(filename, expected_ext); if (!new_name) { bb_error_msg("%s: unknown suffix - ignored", filename); goto err; } /* -f: overwrite existing output files */ if (option_mask32 & OPT_FORCE) { unlink(new_name); } /* O_EXCL: "real" bunzip2 doesn't overwrite files */ /* GNU gunzip does not bail out, but goes to next file */ if (open_to_or_warn(STDOUT_FILENO, new_name, O_WRONLY | O_CREAT | O_EXCL, stat_buf.st_mode)) goto err; } /* Check that the input is sane */ if (!(option_mask32 & OPT_FORCE) && isatty(STDIN_FILENO)) { bb_error_msg_and_die("compressed data not read from terminal, " "use -f to force it"); } if (!(option_mask32 & SEAMLESS_MAGIC)) { init_transformer_state(&xstate); /*xstate.signature_skipped = 0; - already is */ /*xstate.src_fd = STDIN_FILENO; - already is */ xstate.dst_fd = STDOUT_FILENO; status = unpacker(&xstate); if (status < 0) exitcode = 1; } else { if (bb_copyfd_eof(STDIN_FILENO, STDOUT_FILENO) < 0) /* Disk full, tty closed, etc. No point in continuing */ xfunc_die(); } if (!(option_mask32 & OPT_STDOUT)) xclose(STDOUT_FILENO); /* with error check! */ if (filename) { char *del = new_name; if (status >= 0) { unsigned new_name_len; /* TODO: restore other things? */ if (xstate.mtime != 0) { struct timeval times[2]; times[1].tv_sec = times[0].tv_sec = xstate.mtime; times[1].tv_usec = times[0].tv_usec = 0; /* Note: we closed it first. * On some systems calling utimes * then closing resets the mtime * back to current time. */ utimes(new_name, times); /* ignoring errors */ } if (ENABLE_DESKTOP) new_name_len = strlen(new_name); /* Restore source filename (unless tgz -> tar case) */ if (new_name == filename) { new_name_len = strlen(filename); filename[new_name_len] = '.'; } /* Extreme bloat for gunzip compat */ /* Some users do want this info... */ if (ENABLE_DESKTOP && (option_mask32 & OPT_VERBOSE)) { unsigned percent = status ? ((uoff_t)stat_buf.st_size * 100u / (unsigned long long)status) : 0; fprintf(stderr, "%s: %u%% - replaced with %.*s\n", filename, 100u - percent, new_name_len, new_name ); } /* Delete _source_ file */ del = filename; if (option_mask32 & OPT_KEEP) /* ... unless -k */ del = NULL; } if (del) xunlink(del); free_name: if (new_name != filename) free(new_name); } } while (*argv && *++argv); if (option_mask32 & OPT_STDOUT) xclose(STDOUT_FILENO); /* with error check! */ return exitcode; } #if ENABLE_UNCOMPRESS \ || ENABLE_FEATURE_BZIP2_DECOMPRESS \ || ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA \ || ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ static char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext) { char *extension = strrchr(filename, '.'); if (!extension || strcmp(extension + 1, expected_ext) != 0) { /* Mimic GNU gunzip - "real" bunzip2 tries to */ /* unpack file anyway, to file.out */ return NULL; } *extension = '\0'; return filename; } #endif /* * Uncompress applet for busybox (c) 2002 Glenn McGrath * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //usage:#define uncompress_trivial_usage //usage: "[-cf] [FILE]..." //usage:#define uncompress_full_usage "\n\n" //usage: "Decompress .Z file[s]\n" //usage: "\n -c Write to stdout" //usage: "\n -f Overwrite" //config:config UNCOMPRESS //config: bool "uncompress (7.1 kb)" //config: default n # ancient //config: help //config: uncompress is used to decompress archives created by compress. //config: Not much used anymore, replaced by gzip/gunzip. //applet:IF_UNCOMPRESS(APPLET(uncompress, BB_DIR_BIN, BB_SUID_DROP)) //kbuild:lib-$(CONFIG_UNCOMPRESS) += bbunzip.o #if ENABLE_UNCOMPRESS int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int uncompress_main(int argc UNUSED_PARAM, char **argv) { // (N)compress 4.2.4.4: // -d If given, decompression is done instead // -c Write output on stdout, don't remove original // -b Parameter limits the max number of bits/code // -f Forces output file to be generated // -v Write compression statistics // -V Output vesion and compile options // -r Recursive. If a filename is a directory, descend into it and compress everything getopt32(argv, "cf"); argv += optind; return bbunpack(argv, unpack_Z_stream, make_new_name_generic, "Z"); } #endif /* * 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 * based on gzip sources * * Adjusted further by Erik Andersen 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 * * Licensed under GPLv2 or later, see file LICENSE in this source tree. * * 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. */ //usage:#define gunzip_trivial_usage //usage: "[-cfkt] [FILE]..." //usage:#define gunzip_full_usage "\n\n" //usage: "Decompress FILEs (or stdin)\n" //usage: "\n -c Write to stdout" //usage: "\n -f Force" //usage: "\n -k Keep input files" //usage: "\n -t Test file integrity" //usage: //usage:#define gunzip_example_usage //usage: "$ ls -la /tmp/BusyBox*\n" //usage: "-rw-rw-r-- 1 andersen andersen 557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n" //usage: "$ gunzip /tmp/BusyBox-0.43.tar.gz\n" //usage: "$ ls -la /tmp/BusyBox*\n" //usage: "-rw-rw-r-- 1 andersen andersen 1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n" //usage: //usage:#define zcat_trivial_usage //usage: "[FILE]..." //usage:#define zcat_full_usage "\n\n" //usage: "Decompress to stdout" //config:config GUNZIP //config: bool "gunzip (12 kb)" //config: default y //config: select FEATURE_GZIP_DECOMPRESS //config: help //config: gunzip is used to decompress archives created by gzip. //config: You can use the '-t' option to test the integrity of //config: an archive, without decompressing it. //config: //config:config ZCAT //config: bool "zcat (25 kb)" //config: default y //config: select FEATURE_GZIP_DECOMPRESS //config: help //config: Alias to "gunzip -c". //config: //config:config FEATURE_GUNZIP_LONG_OPTIONS //config: bool "Enable long options" //config: default y //config: depends on (GUNZIP || ZCAT) && LONG_OPTS //applet:IF_GUNZIP(APPLET(gunzip, BB_DIR_BIN, BB_SUID_DROP)) // APPLET_ODDNAME:name main location suid_type help //applet:IF_ZCAT(APPLET_ODDNAME(zcat, gunzip, BB_DIR_BIN, BB_SUID_DROP, zcat)) #if ENABLE_FEATURE_GZIP_DECOMPRESS static char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM) { char *extension = strrchr(filename, '.'); if (!extension) return NULL; extension++; if (strcmp(extension, "tgz" + 1) == 0 #if ENABLE_FEATURE_SEAMLESS_Z || (extension[0] == 'Z' && extension[1] == '\0') #endif ) { extension[-1] = '\0'; } else if (strcmp(extension, "tgz") == 0) { filename = xstrdup(filename); extension = strrchr(filename, '.'); extension[2] = 'a'; extension[3] = 'r'; } else { return NULL; } return filename; } #if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS static const char gunzip_longopts[] ALIGN1 = "stdout\0" No_argument "c" "to-stdout\0" No_argument "c" "force\0" No_argument "f" "test\0" No_argument "t" "no-name\0" No_argument "n" ; #endif /* * Linux kernel build uses gzip -d -n. We accept and ignore it. * Man page says: * -n --no-name * gzip: do not save the original file name and time stamp. * (The original name is always saved if the name had to be truncated.) * gunzip: do not restore the original file name/time even if present * (remove only the gzip suffix from the compressed file name). * This option is the default when decompressing. * -N --name * gzip: always save the original file name and time stamp (this is the default) * gunzip: restore the original file name and time stamp if present. */ int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int gunzip_main(int argc UNUSED_PARAM, char **argv) { #if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS getopt32long(argv, "cfkvqdtn", gunzip_longopts); #else getopt32(argv, "cfkvqdtn"); #endif argv += optind; /* If called as zcat... * Normally, "zcat" is just "gunzip -c". * But if seamless magic is enabled, then we are much more clever. */ if (ENABLE_ZCAT && (!ENABLE_GUNZIP || applet_name[1] == 'c')) option_mask32 |= OPT_STDOUT | SEAMLESS_MAGIC; return bbunpack(argv, unpack_gz_stream, make_new_name_gunzip, /*unused:*/ NULL); } #endif /* FEATURE_GZIP_DECOMPRESS */ /* * Modified for busybox by Glenn McGrath * Added support output to stdout by Thomas Lundquist * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //usage:#define bunzip2_trivial_usage //usage: "[-cfk] [FILE]..." //usage:#define bunzip2_full_usage "\n\n" //usage: "Decompress FILEs (or stdin)\n" //usage: "\n -c Write to stdout" //usage: "\n -f Force" //usage: "\n -k Keep input files" //usage:#define bzcat_trivial_usage //usage: "[FILE]..." //usage:#define bzcat_full_usage "\n\n" //usage: "Decompress to stdout" //config:config BUNZIP2 //config: bool "bunzip2 (8.8 kb)" //config: default y //config: select FEATURE_BZIP2_DECOMPRESS //config: help //config: bunzip2 is a compression utility using the Burrows-Wheeler block //config: sorting text compression algorithm, and Huffman coding. Compression //config: is generally considerably better than that achieved by more //config: conventional LZ77/LZ78-based compressors, and approaches the //config: performance of the PPM family of statistical compressors. //config: //config: Unless you have a specific application which requires bunzip2, you //config: should probably say N here. //config: //config:config BZCAT //config: bool "bzcat (8.8 kb)" //config: default y //config: select FEATURE_BZIP2_DECOMPRESS //config: help //config: Alias to "bunzip2 -c". //applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP)) // APPLET_ODDNAME:name main location suid_type help //applet:IF_BZCAT(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat)) #if ENABLE_FEATURE_BZIP2_DECOMPRESS || ENABLE_BUNZIP2 || ENABLE_BZCAT int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int bunzip2_main(int argc UNUSED_PARAM, char **argv) { getopt32(argv, "cfkvqdt"); argv += optind; if (ENABLE_BZCAT && (!ENABLE_BUNZIP2 || applet_name[2] == 'c')) /* bzcat */ option_mask32 |= OPT_STDOUT; return bbunpack(argv, unpack_bz2_stream, make_new_name_generic, "bz2"); } #endif /* * Small lzma deflate implementation. * Copyright (C) 2006 Aurelien Jacobs * * Based on bunzip.c from busybox * * Licensed under GPLv2, see file LICENSE in this source tree. */ //usage:#define unlzma_trivial_usage //usage: "[-cfk] [FILE]..." //usage:#define unlzma_full_usage "\n\n" //usage: "Decompress FILE (or stdin)\n" //usage: "\n -c Write to stdout" //usage: "\n -f Force" //usage: "\n -k Keep input files" //usage: //usage:#define lzma_trivial_usage //usage: "-d [-cfk] [FILE]..." //usage:#define lzma_full_usage "\n\n" //usage: "Decompress FILE (or stdin)\n" //usage: "\n -d Decompress" //usage: "\n -c Write to stdout" //usage: "\n -f Force" //usage: "\n -k Keep input files" //usage: //usage:#define lzcat_trivial_usage //usage: "[FILE]..." //usage:#define lzcat_full_usage "\n\n" //usage: "Decompress to stdout" //config:config UNLZMA //config: bool "unlzma (8.6 kb)" //config: default y //config: help //config: unlzma is a compression utility using the Lempel-Ziv-Markov chain //config: compression algorithm, and range coding. Compression //config: is generally considerably better than that achieved by the bzip2 //config: compressors. //config: //config:config LZCAT //config: bool "lzcat (8.5 kb)" //config: default y //config: help //config: Alias to "unlzma -c". //config: //config:config LZMA //config: bool "lzma -d" //config: default y //config: help //config: Enable this option if you want commands like "lzma -d" to work. //config: IOW: you'll get lzma applet, but it will always require -d option. //applet:IF_UNLZMA(APPLET(unlzma, BB_DIR_USR_BIN, BB_SUID_DROP)) // APPLET_ODDNAME:name main location suid_type help //applet:IF_LZCAT(APPLET_ODDNAME(lzcat, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzcat)) //applet:IF_LZMA( APPLET_ODDNAME(lzma, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzma)) //kbuild:lib-$(CONFIG_UNLZMA) += bbunzip.o //kbuild:lib-$(CONFIG_LZCAT) += bbunzip.o //kbuild:lib-$(CONFIG_LZMA) += bbunzip.o #if ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int unlzma_main(int argc UNUSED_PARAM, char **argv) { IF_LZMA(int opts =) getopt32(argv, "cfkvqdt"); # if ENABLE_LZMA /* lzma without -d or -t? */ if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST))) bb_show_usage(); # endif /* lzcat? */ if (ENABLE_LZCAT && applet_name[2] == 'c') option_mask32 |= OPT_STDOUT; argv += optind; return bbunpack(argv, unpack_lzma_stream, make_new_name_generic, "lzma"); } #endif //usage:#define unxz_trivial_usage //usage: "[-cfk] [FILE]..." //usage:#define unxz_full_usage "\n\n" //usage: "Decompress FILE (or stdin)\n" //usage: "\n -c Write to stdout" //usage: "\n -f Force" //usage: "\n -k Keep input files" //usage: //usage:#define xz_trivial_usage //usage: "-d [-cfk] [FILE]..." //usage:#define xz_full_usage "\n\n" //usage: "Decompress FILE (or stdin)\n" //usage: "\n -d Decompress" //usage: "\n -c Write to stdout" //usage: "\n -f Force" //usage: "\n -k Keep input files" //usage: //usage:#define xzcat_trivial_usage //usage: "[FILE]..." //usage:#define xzcat_full_usage "\n\n" //usage: "Decompress to stdout" //config:config UNXZ //config: bool "unxz (13 kb)" //config: default y //config: help //config: unxz is a unlzma successor. //config: //config:config XZCAT //config: bool "xzcat (13 kb)" //config: default y //config: help //config: Alias to "unxz -c". //config: //config:config XZ //config: bool "xz -d" //config: default y //config: help //config: Enable this option if you want commands like "xz -d" to work. //config: IOW: you'll get xz applet, but it will always require -d option. //applet:IF_UNXZ(APPLET(unxz, BB_DIR_USR_BIN, BB_SUID_DROP)) // APPLET_ODDNAME:name main location suid_type help //applet:IF_XZCAT(APPLET_ODDNAME(xzcat, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xzcat)) //applet:IF_XZ( APPLET_ODDNAME(xz, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xz)) //kbuild:lib-$(CONFIG_UNXZ) += bbunzip.o //kbuild:lib-$(CONFIG_XZCAT) += bbunzip.o //kbuild:lib-$(CONFIG_XZ) += bbunzip.o #if ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int unxz_main(int argc UNUSED_PARAM, char **argv) { IF_XZ(int opts =) getopt32(argv, "cfkvqdt"); # if ENABLE_XZ /* xz without -d or -t? */ if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST))) bb_show_usage(); # endif /* xzcat? */ if (ENABLE_XZCAT && applet_name[2] == 'c') option_mask32 |= OPT_STDOUT; argv += optind; return bbunpack(argv, unpack_xz_stream, make_new_name_generic, "xz"); } #endif