[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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[2725] | 3 | * Common code for gunzip-like applets
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[1765] | 4 | *
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[2725] | 5 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[1765] | 6 | */
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| 7 | #include "libbb.h"
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[3232] | 8 | #include "bb_archive.h"
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[1765] | 9 |
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| 10 | enum {
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[2725] | 11 | OPT_STDOUT = 1 << 0,
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| 12 | OPT_FORCE = 1 << 1,
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| 13 | /* only some decompressors: */
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| 14 | OPT_VERBOSE = 1 << 2,
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| 15 | OPT_DECOMPRESS = 1 << 3,
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| 16 | OPT_TEST = 1 << 4,
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[1765] | 17 | };
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| 18 |
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| 19 | static
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| 20 | int open_to_or_warn(int to_fd, const char *filename, int flags, int mode)
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| 21 | {
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| 22 | int fd = open3_or_warn(filename, flags, mode);
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| 23 | if (fd < 0) {
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| 24 | return 1;
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| 25 | }
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| 26 | xmove_fd(fd, to_fd);
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| 27 | return 0;
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| 28 | }
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| 29 |
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[2725] | 30 | char* FAST_FUNC append_ext(char *filename, const char *expected_ext)
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| 31 | {
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| 32 | return xasprintf("%s.%s", filename, expected_ext);
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| 33 | }
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| 34 |
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| 35 | int FAST_FUNC bbunpack(char **argv,
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[3232] | 36 | IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_aux_data_t *aux),
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[2725] | 37 | char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
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| 38 | const char *expected_ext
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[1765] | 39 | )
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| 40 | {
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| 41 | struct stat stat_buf;
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[2725] | 42 | IF_DESKTOP(long long) int status;
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[1765] | 43 | char *filename, *new_name;
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| 44 | smallint exitcode = 0;
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[3232] | 45 | transformer_aux_data_t aux;
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[1765] | 46 |
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| 47 | do {
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| 48 | /* NB: new_name is *maybe* malloc'ed! */
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| 49 | new_name = NULL;
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| 50 | filename = *argv; /* can be NULL - 'streaming' bunzip2 */
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| 51 |
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| 52 | if (filename && LONE_DASH(filename))
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| 53 | filename = NULL;
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| 54 |
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| 55 | /* Open src */
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| 56 | if (filename) {
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| 57 | if (stat(filename, &stat_buf) != 0) {
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[2725] | 58 | bb_simple_perror_msg(filename);
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[1765] | 59 | err:
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| 60 | exitcode = 1;
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| 61 | goto free_name;
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| 62 | }
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| 63 | if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0))
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| 64 | goto err;
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| 65 | }
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| 66 |
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| 67 | /* Special cases: test, stdout */
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| 68 | if (option_mask32 & (OPT_STDOUT|OPT_TEST)) {
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| 69 | if (option_mask32 & OPT_TEST)
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| 70 | if (open_to_or_warn(STDOUT_FILENO, bb_dev_null, O_WRONLY, 0))
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| 71 | goto err;
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| 72 | filename = NULL;
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| 73 | }
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| 74 |
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| 75 | /* Open dst if we are going to unpack to file */
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| 76 | if (filename) {
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[2725] | 77 | new_name = make_new_name(filename, expected_ext);
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[1765] | 78 | if (!new_name) {
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| 79 | bb_error_msg("%s: unknown suffix - ignored", filename);
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| 80 | goto err;
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| 81 | }
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[2725] | 82 |
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| 83 | /* -f: overwrite existing output files */
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| 84 | if (option_mask32 & OPT_FORCE) {
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| 85 | unlink(new_name);
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| 86 | }
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| 87 |
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[1765] | 88 | /* O_EXCL: "real" bunzip2 doesn't overwrite files */
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[2725] | 89 | /* GNU gunzip does not bail out, but goes to next file */
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[1765] | 90 | if (open_to_or_warn(STDOUT_FILENO, new_name, O_WRONLY | O_CREAT | O_EXCL,
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| 91 | stat_buf.st_mode))
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| 92 | goto err;
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| 93 | }
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| 94 |
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| 95 | /* Check that the input is sane */
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| 96 | if (isatty(STDIN_FILENO) && (option_mask32 & OPT_FORCE) == 0) {
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| 97 | bb_error_msg_and_die("compressed data not read from terminal, "
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| 98 | "use -f to force it");
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| 99 | }
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| 100 |
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[3232] | 101 | init_transformer_aux_data(&aux);
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| 102 | aux.check_signature = 1;
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| 103 | status = unpacker(&aux);
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[1765] | 104 | if (status < 0)
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| 105 | exitcode = 1;
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| 106 |
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[3232] | 107 | if (!(option_mask32 & OPT_STDOUT))
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| 108 | xclose(STDOUT_FILENO); /* with error check! */
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| 109 |
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[1765] | 110 | if (filename) {
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| 111 | char *del = new_name;
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| 112 | if (status >= 0) {
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[2725] | 113 | /* TODO: restore other things? */
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[3232] | 114 | if (aux.mtime != 0) {
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[2725] | 115 | struct timeval times[2];
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| 116 |
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[3232] | 117 | times[1].tv_sec = times[0].tv_sec = aux.mtime;
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[2725] | 118 | times[1].tv_usec = times[0].tv_usec = 0;
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| 119 | /* Note: we closed it first.
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| 120 | * On some systems calling utimes
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| 121 | * then closing resets the mtime
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| 122 | * back to current time. */
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| 123 | utimes(new_name, times); /* ignoring errors */
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| 124 | }
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| 125 |
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[1765] | 126 | /* Delete _compressed_ file */
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| 127 | del = filename;
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| 128 | /* restore extension (unless tgz -> tar case) */
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| 129 | if (new_name == filename)
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| 130 | filename[strlen(filename)] = '.';
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| 131 | }
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| 132 | xunlink(del);
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| 133 |
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| 134 | #if 0 /* Currently buggy - wrong name: "a.gz: 261% - replaced with a.gz" */
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| 135 | /* Extreme bloat for gunzip compat */
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| 136 | if (ENABLE_DESKTOP && (option_mask32 & OPT_VERBOSE) && status >= 0) {
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| 137 | fprintf(stderr, "%s: %u%% - replaced with %s\n",
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| 138 | filename, (unsigned)(stat_buf.st_size*100 / (status+1)), new_name);
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| 139 | }
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| 140 | #endif
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| 141 |
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| 142 | free_name:
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| 143 | if (new_name != filename)
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| 144 | free(new_name);
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| 145 | }
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| 146 | } while (*argv && *++argv);
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| 147 |
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[3232] | 148 | if (option_mask32 & OPT_STDOUT)
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| 149 | xclose(STDOUT_FILENO); /* with error check! */
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| 150 |
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[1765] | 151 | return exitcode;
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| 152 | }
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| 153 |
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[2725] | 154 | #if ENABLE_UNCOMPRESS || ENABLE_BUNZIP2 || ENABLE_UNLZMA || ENABLE_UNXZ
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[1765] | 155 | static
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[2725] | 156 | char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
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[1765] | 157 | {
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| 158 | char *extension = strrchr(filename, '.');
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| 159 | if (!extension || strcmp(extension + 1, expected_ext) != 0) {
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| 160 | /* Mimic GNU gunzip - "real" bunzip2 tries to */
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| 161 | /* unpack file anyway, to file.out */
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| 162 | return NULL;
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| 163 | }
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| 164 | *extension = '\0';
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| 165 | return filename;
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| 166 | }
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| 167 | #endif
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| 168 |
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| 169 |
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| 170 | /*
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[2725] | 171 | * Uncompress applet for busybox (c) 2002 Glenn McGrath
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[1765] | 172 | *
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[2725] | 173 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[1765] | 174 | */
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[3232] | 175 |
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| 176 | //usage:#define uncompress_trivial_usage
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| 177 | //usage: "[-cf] [FILE]..."
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| 178 | //usage:#define uncompress_full_usage "\n\n"
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| 179 | //usage: "Decompress .Z file[s]\n"
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| 180 | //usage: "\n -c Write to stdout"
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| 181 | //usage: "\n -f Overwrite"
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| 182 |
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[2725] | 183 | #if ENABLE_UNCOMPRESS
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[1765] | 184 | static
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[3232] | 185 | IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(transformer_aux_data_t *aux)
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[1765] | 186 | {
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[3232] | 187 | return unpack_Z_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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[1765] | 188 | }
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[2725] | 189 | int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 190 | int uncompress_main(int argc UNUSED_PARAM, char **argv)
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[1765] | 191 | {
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| 192 | getopt32(argv, "cf");
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| 193 | argv += optind;
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| 194 |
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[2725] | 195 | return bbunpack(argv, unpack_uncompress, make_new_name_generic, "Z");
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[1765] | 196 | }
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| 197 | #endif
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| 198 |
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| 199 |
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| 200 | /*
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| 201 | * Gzip implementation for busybox
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| 202 | *
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| 203 | * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
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| 204 | *
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| 205 | * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
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| 206 | * based on gzip sources
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| 207 | *
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| 208 | * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
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| 209 | * well as stdin/stdout, and to generally behave itself wrt command line
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| 210 | * handling.
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| 211 | *
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| 212 | * General cleanup to better adhere to the style guide and make use of standard
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[2725] | 213 | * busybox functions by Glenn McGrath
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[1765] | 214 | *
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[2725] | 215 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[1765] | 216 | *
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| 217 | * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
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| 218 | * Copyright (C) 1992-1993 Jean-loup Gailly
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| 219 | * The unzip code was written and put in the public domain by Mark Adler.
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| 220 | * Portions of the lzw code are derived from the public domain 'compress'
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| 221 | * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
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| 222 | * Ken Turkowski, Dave Mack and Peter Jannesen.
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| 223 | *
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| 224 | * See the license_msg below and the file COPYING for the software license.
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| 225 | * See the file algorithm.doc for the compression algorithms and file formats.
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| 226 | */
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[3232] | 227 |
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| 228 | //usage:#define gunzip_trivial_usage
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| 229 | //usage: "[-cft] [FILE]..."
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| 230 | //usage:#define gunzip_full_usage "\n\n"
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| 231 | //usage: "Decompress FILEs (or stdin)\n"
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| 232 | //usage: "\n -c Write to stdout"
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| 233 | //usage: "\n -f Force"
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| 234 | //usage: "\n -t Test file integrity"
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| 235 | //usage:
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| 236 | //usage:#define gunzip_example_usage
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| 237 | //usage: "$ ls -la /tmp/BusyBox*\n"
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| 238 | //usage: "-rw-rw-r-- 1 andersen andersen 557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n"
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| 239 | //usage: "$ gunzip /tmp/BusyBox-0.43.tar.gz\n"
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| 240 | //usage: "$ ls -la /tmp/BusyBox*\n"
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| 241 | //usage: "-rw-rw-r-- 1 andersen andersen 1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n"
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| 242 | //usage:
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| 243 | //usage:#define zcat_trivial_usage
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| 244 | //usage: "FILE"
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| 245 | //usage:#define zcat_full_usage "\n\n"
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| 246 | //usage: "Decompress to stdout"
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| 247 |
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[1765] | 248 | #if ENABLE_GUNZIP
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| 249 | static
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[2725] | 250 | char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
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[1765] | 251 | {
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| 252 | char *extension = strrchr(filename, '.');
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| 253 |
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| 254 | if (!extension)
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| 255 | return NULL;
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| 256 |
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| 257 | extension++;
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| 258 | if (strcmp(extension, "tgz" + 1) == 0
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[2725] | 259 | #if ENABLE_FEATURE_SEAMLESS_Z
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| 260 | || (extension[0] == 'Z' && extension[1] == '\0')
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[1765] | 261 | #endif
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| 262 | ) {
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| 263 | extension[-1] = '\0';
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| 264 | } else if (strcmp(extension, "tgz") == 0) {
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| 265 | filename = xstrdup(filename);
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| 266 | extension = strrchr(filename, '.');
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| 267 | extension[2] = 'a';
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| 268 | extension[3] = 'r';
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| 269 | } else {
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| 270 | return NULL;
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| 271 | }
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| 272 | return filename;
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| 273 | }
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| 274 | static
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[3232] | 275 | IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(transformer_aux_data_t *aux)
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[1765] | 276 | {
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[3232] | 277 | return unpack_gz_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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[1765] | 278 | }
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[2725] | 279 | /*
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| 280 | * Linux kernel build uses gzip -d -n. We accept and ignore it.
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| 281 | * Man page says:
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| 282 | * -n --no-name
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| 283 | * gzip: do not save the original file name and time stamp.
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| 284 | * (The original name is always saved if the name had to be truncated.)
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| 285 | * gunzip: do not restore the original file name/time even if present
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| 286 | * (remove only the gzip suffix from the compressed file name).
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| 287 | * This option is the default when decompressing.
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| 288 | * -N --name
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| 289 | * gzip: always save the original file name and time stamp (this is the default)
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| 290 | * gunzip: restore the original file name and time stamp if present.
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| 291 | */
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| 292 | int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 293 | int gunzip_main(int argc UNUSED_PARAM, char **argv)
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[1765] | 294 | {
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[2725] | 295 | getopt32(argv, "cfvdtn");
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[1765] | 296 | argv += optind;
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| 297 | /* if called as zcat */
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| 298 | if (applet_name[1] == 'c')
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| 299 | option_mask32 |= OPT_STDOUT;
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| 300 |
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[2725] | 301 | return bbunpack(argv, unpack_gunzip, make_new_name_gunzip, /*unused:*/ NULL);
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[1765] | 302 | }
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| 303 | #endif
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| 304 |
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| 305 |
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| 306 | /*
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[2725] | 307 | * Modified for busybox by Glenn McGrath
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| 308 | * Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
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[1765] | 309 | *
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[2725] | 310 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[1765] | 311 | */
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[2725] | 312 | //usage:#define bunzip2_trivial_usage
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| 313 | //usage: "[-cf] [FILE]..."
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| 314 | //usage:#define bunzip2_full_usage "\n\n"
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| 315 | //usage: "Decompress FILEs (or stdin)\n"
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| 316 | //usage: "\n -c Write to stdout"
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| 317 | //usage: "\n -f Force"
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| 318 | //usage:#define bzcat_trivial_usage
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| 319 | //usage: "FILE"
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| 320 | //usage:#define bzcat_full_usage "\n\n"
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| 321 | //usage: "Decompress to stdout"
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[3232] | 322 | //applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
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| 323 | //applet:IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
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[2725] | 324 | #if ENABLE_BUNZIP2
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[1765] | 325 | static
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[3232] | 326 | IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(transformer_aux_data_t *aux)
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[1765] | 327 | {
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[3232] | 328 | return unpack_bz2_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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[1765] | 329 | }
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[2725] | 330 | int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 331 | int bunzip2_main(int argc UNUSED_PARAM, char **argv)
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[1765] | 332 | {
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[2725] | 333 | getopt32(argv, "cfvdt");
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[1765] | 334 | argv += optind;
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[2725] | 335 | if (applet_name[2] == 'c') /* bzcat */
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[1765] | 336 | option_mask32 |= OPT_STDOUT;
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| 337 |
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[2725] | 338 | return bbunpack(argv, unpack_bunzip2, make_new_name_generic, "bz2");
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[1765] | 339 | }
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| 340 | #endif
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| 341 |
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| 342 |
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| 343 | /*
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[2725] | 344 | * Small lzma deflate implementation.
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| 345 | * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
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[1765] | 346 | *
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[2725] | 347 | * Based on bunzip.c from busybox
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| 348 | *
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| 349 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[1765] | 350 | */
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[3232] | 351 |
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| 352 | //usage:#define unlzma_trivial_usage
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| 353 | //usage: "[-cf] [FILE]..."
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| 354 | //usage:#define unlzma_full_usage "\n\n"
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| 355 | //usage: "Decompress FILE (or stdin)\n"
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| 356 | //usage: "\n -c Write to stdout"
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| 357 | //usage: "\n -f Force"
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| 358 | //usage:
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| 359 | //usage:#define lzma_trivial_usage
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| 360 | //usage: "-d [-cf] [FILE]..."
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| 361 | //usage:#define lzma_full_usage "\n\n"
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| 362 | //usage: "Decompress FILE (or stdin)\n"
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| 363 | //usage: "\n -d Decompress"
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| 364 | //usage: "\n -c Write to stdout"
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| 365 | //usage: "\n -f Force"
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| 366 | //usage:
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| 367 | //usage:#define lzcat_trivial_usage
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| 368 | //usage: "FILE"
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| 369 | //usage:#define lzcat_full_usage "\n\n"
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| 370 | //usage: "Decompress to stdout"
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| 371 | //usage:
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| 372 | //usage:#define unxz_trivial_usage
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| 373 | //usage: "[-cf] [FILE]..."
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| 374 | //usage:#define unxz_full_usage "\n\n"
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| 375 | //usage: "Decompress FILE (or stdin)\n"
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| 376 | //usage: "\n -c Write to stdout"
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| 377 | //usage: "\n -f Force"
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| 378 | //usage:
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| 379 | //usage:#define xz_trivial_usage
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| 380 | //usage: "-d [-cf] [FILE]..."
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| 381 | //usage:#define xz_full_usage "\n\n"
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| 382 | //usage: "Decompress FILE (or stdin)\n"
|
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| 383 | //usage: "\n -d Decompress"
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| 384 | //usage: "\n -c Write to stdout"
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| 385 | //usage: "\n -f Force"
|
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| 386 | //usage:
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| 387 | //usage:#define xzcat_trivial_usage
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| 388 | //usage: "FILE"
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| 389 | //usage:#define xzcat_full_usage "\n\n"
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| 390 | //usage: "Decompress to stdout"
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| 391 |
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[2725] | 392 | #if ENABLE_UNLZMA
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[1765] | 393 | static
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[3232] | 394 | IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(transformer_aux_data_t *aux)
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[1765] | 395 | {
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[3232] | 396 | return unpack_lzma_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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[1765] | 397 | }
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[2725] | 398 | int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 399 | int unlzma_main(int argc UNUSED_PARAM, char **argv)
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| 400 | {
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| 401 | IF_LZMA(int opts =) getopt32(argv, "cfvdt");
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| 402 | # if ENABLE_LZMA
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| 403 | /* lzma without -d or -t? */
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| 404 | if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
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| 405 | bb_show_usage();
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| 406 | # endif
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| 407 | /* lzcat? */
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| 408 | if (applet_name[2] == 'c')
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| 409 | option_mask32 |= OPT_STDOUT;
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[1765] | 410 |
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[2725] | 411 | argv += optind;
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| 412 | return bbunpack(argv, unpack_unlzma, make_new_name_generic, "lzma");
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| 413 | }
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| 414 | #endif
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| 415 |
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| 416 |
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| 417 | #if ENABLE_UNXZ
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[1765] | 418 | static
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[3232] | 419 | IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(transformer_aux_data_t *aux)
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[1765] | 420 | {
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[3232] | 421 | return unpack_xz_stream(aux, STDIN_FILENO, STDOUT_FILENO);
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[1765] | 422 | }
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[2725] | 423 | int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 424 | int unxz_main(int argc UNUSED_PARAM, char **argv)
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| 425 | {
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| 426 | IF_XZ(int opts =) getopt32(argv, "cfvdt");
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| 427 | # if ENABLE_XZ
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| 428 | /* xz without -d or -t? */
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| 429 | if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
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| 430 | bb_show_usage();
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| 431 | # endif
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| 432 | /* xzcat? */
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| 433 | if (applet_name[2] == 'c')
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| 434 | option_mask32 |= OPT_STDOUT;
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[1765] | 435 |
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| 436 | argv += optind;
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[2725] | 437 | return bbunpack(argv, unpack_unxz, make_new_name_generic, "xz");
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[1765] | 438 | }
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| 439 | #endif
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