[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Mini cpio implementation for busybox
|
---|
| 4 | *
|
---|
| 5 | * Copyright (C) 2001 by Glenn McGrath
|
---|
| 6 | *
|
---|
[2725] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
[821] | 8 | *
|
---|
| 9 | * Limitations:
|
---|
[2725] | 10 | * Doesn't check CRC's
|
---|
| 11 | * Only supports new ASCII and CRC formats
|
---|
[821] | 12 | */
|
---|
[1765] | 13 | #include "libbb.h"
|
---|
[3621] | 14 | #include "common_bufsiz.h"
|
---|
[3232] | 15 | #include "bb_archive.h"
|
---|
[821] | 16 |
|
---|
[3621] | 17 | //config:config CPIO
|
---|
| 18 | //config: bool "cpio"
|
---|
| 19 | //config: default y
|
---|
| 20 | //config: help
|
---|
| 21 | //config: cpio is an archival utility program used to create, modify, and
|
---|
| 22 | //config: extract contents from archives.
|
---|
| 23 | //config: cpio has 110 bytes of overheads for every stored file.
|
---|
| 24 | //config:
|
---|
| 25 | //config: This implementation of cpio can extract cpio archives created in the
|
---|
| 26 | //config: "newc" or "crc" format, it cannot create or modify them.
|
---|
| 27 | //config:
|
---|
| 28 | //config: Unless you have a specific application which requires cpio, you
|
---|
| 29 | //config: should probably say N here.
|
---|
| 30 | //config:
|
---|
| 31 | //config:config FEATURE_CPIO_O
|
---|
| 32 | //config: bool "Support for archive creation"
|
---|
| 33 | //config: default y
|
---|
| 34 | //config: depends on CPIO
|
---|
| 35 | //config: help
|
---|
| 36 | //config: This implementation of cpio can create cpio archives in the "newc"
|
---|
| 37 | //config: format only.
|
---|
| 38 | //config:
|
---|
| 39 | //config:config FEATURE_CPIO_P
|
---|
| 40 | //config: bool "Support for passthrough mode"
|
---|
| 41 | //config: default y
|
---|
| 42 | //config: depends on FEATURE_CPIO_O
|
---|
| 43 | //config: help
|
---|
| 44 | //config: Passthrough mode. Rarely used.
|
---|
| 45 |
|
---|
| 46 | //applet:IF_CPIO(APPLET(cpio, BB_DIR_BIN, BB_SUID_DROP))
|
---|
| 47 | //kbuild:lib-$(CONFIG_CPIO) += cpio.o
|
---|
| 48 |
|
---|
[3232] | 49 | //usage:#define cpio_trivial_usage
|
---|
[3621] | 50 | //usage: "[-dmvu] [-F FILE] [-R USER[:GRP]]" IF_FEATURE_CPIO_O(" [-H newc]")
|
---|
[3232] | 51 | //usage: " [-ti"IF_FEATURE_CPIO_O("o")"]" IF_FEATURE_CPIO_P(" [-p DIR]")
|
---|
| 52 | //usage: " [EXTR_FILE]..."
|
---|
| 53 | //usage:#define cpio_full_usage "\n\n"
|
---|
| 54 | //usage: "Extract or list files from a cpio archive"
|
---|
| 55 | //usage: IF_FEATURE_CPIO_O(", or"
|
---|
| 56 | //usage: "\ncreate an archive" IF_FEATURE_CPIO_P(" (-o) or copy files (-p)")
|
---|
| 57 | //usage: " using file list on stdin"
|
---|
| 58 | //usage: )
|
---|
| 59 | //usage: "\n"
|
---|
| 60 | //usage: "\nMain operation mode:"
|
---|
| 61 | //usage: "\n -t List"
|
---|
| 62 | //usage: "\n -i Extract EXTR_FILEs (or all)"
|
---|
| 63 | //usage: IF_FEATURE_CPIO_O(
|
---|
| 64 | //usage: "\n -o Create (requires -H newc)"
|
---|
| 65 | //usage: )
|
---|
| 66 | //usage: IF_FEATURE_CPIO_P(
|
---|
| 67 | //usage: "\n -p DIR Copy files to DIR"
|
---|
| 68 | //usage: )
|
---|
[3621] | 69 | //usage: "\nOptions:"
|
---|
[3232] | 70 | //usage: "\n -d Make leading directories"
|
---|
| 71 | //usage: "\n -m Preserve mtime"
|
---|
| 72 | //usage: "\n -v Verbose"
|
---|
| 73 | //usage: "\n -u Overwrite"
|
---|
| 74 | //usage: "\n -F FILE Input (-t,-i,-p) or output (-o) file"
|
---|
[3621] | 75 | //usage: "\n -R USER[:GRP] Set owner of created files"
|
---|
[3232] | 76 | //usage: IF_FEATURE_CPIO_O(
|
---|
| 77 | //usage: "\n -H newc Archive format"
|
---|
| 78 | //usage: )
|
---|
| 79 |
|
---|
[2725] | 80 | /* GNU cpio 2.9 --help (abridged):
|
---|
[821] | 81 |
|
---|
[2725] | 82 | Modes:
|
---|
| 83 | -t, --list List the archive
|
---|
| 84 | -i, --extract Extract files from an archive
|
---|
| 85 | -o, --create Create the archive
|
---|
[3232] | 86 | -p, --pass-through Copy-pass mode
|
---|
[2725] | 87 |
|
---|
| 88 | Options valid in any mode:
|
---|
| 89 | --block-size=SIZE I/O block size = SIZE * 512 bytes
|
---|
| 90 | -B I/O block size = 5120 bytes
|
---|
| 91 | -c Use the old portable (ASCII) archive format
|
---|
| 92 | -C, --io-size=NUMBER I/O block size in bytes
|
---|
| 93 | -f, --nonmatching Only copy files that do not match given pattern
|
---|
| 94 | -F, --file=FILE Use FILE instead of standard input or output
|
---|
| 95 | -H, --format=FORMAT Use given archive FORMAT
|
---|
| 96 | -M, --message=STRING Print STRING when the end of a volume of the
|
---|
| 97 | backup media is reached
|
---|
| 98 | -n, --numeric-uid-gid If -v, show numeric UID and GID
|
---|
| 99 | --quiet Do not print the number of blocks copied
|
---|
| 100 | --rsh-command=COMMAND Use remote COMMAND instead of rsh
|
---|
| 101 | -v, --verbose Verbosely list the files processed
|
---|
| 102 | -V, --dot Print a "." for each file processed
|
---|
| 103 | -W, --warning=FLAG Control warning display: 'none','truncate','all';
|
---|
| 104 | multiple options accumulate
|
---|
| 105 |
|
---|
| 106 | Options valid only in --extract mode:
|
---|
| 107 | -b, --swap Swap both halfwords of words and bytes of
|
---|
| 108 | halfwords in the data (equivalent to -sS)
|
---|
| 109 | -r, --rename Interactively rename files
|
---|
| 110 | -s, --swap-bytes Swap the bytes of each halfword in the files
|
---|
| 111 | -S, --swap-halfwords Swap the halfwords of each word (4 bytes)
|
---|
| 112 | --to-stdout Extract files to standard output
|
---|
| 113 | -E, --pattern-file=FILE Read additional patterns specifying filenames to
|
---|
| 114 | extract or list from FILE
|
---|
| 115 | --only-verify-crc Verify CRC's, don't actually extract the files
|
---|
| 116 |
|
---|
| 117 | Options valid only in --create mode:
|
---|
| 118 | -A, --append Append to an existing archive
|
---|
| 119 | -O FILE File to use instead of standard output
|
---|
| 120 |
|
---|
| 121 | Options valid only in --pass-through mode:
|
---|
| 122 | -l, --link Link files instead of copying them, when possible
|
---|
| 123 |
|
---|
| 124 | Options valid in --extract and --create modes:
|
---|
| 125 | --absolute-filenames Do not strip file system prefix components from
|
---|
| 126 | the file names
|
---|
| 127 | --no-absolute-filenames Create all files relative to the current dir
|
---|
| 128 |
|
---|
| 129 | Options valid in --create and --pass-through modes:
|
---|
| 130 | -0, --null A list of filenames is terminated by a NUL
|
---|
| 131 | -a, --reset-access-time Reset the access times of files after reading them
|
---|
| 132 | -I FILE File to use instead of standard input
|
---|
| 133 | -L, --dereference Dereference symbolic links (copy the files
|
---|
| 134 | that they point to instead of copying the links)
|
---|
[3621] | 135 | -R, --owner=[USER][:.][GRP] Set owner of created files
|
---|
[2725] | 136 |
|
---|
| 137 | Options valid in --extract and --pass-through modes:
|
---|
| 138 | -d, --make-directories Create leading directories where needed
|
---|
| 139 | -m, --preserve-modification-time Retain mtime when creating files
|
---|
| 140 | --no-preserve-owner Do not change the ownership of the files
|
---|
| 141 | --sparse Write files with blocks of zeros as sparse files
|
---|
| 142 | -u, --unconditional Replace all files unconditionally
|
---|
| 143 | */
|
---|
[3232] | 144 |
|
---|
[2725] | 145 | enum {
|
---|
[3232] | 146 | OPT_EXTRACT = (1 << 0),
|
---|
| 147 | OPT_TEST = (1 << 1),
|
---|
| 148 | OPT_NUL_TERMINATED = (1 << 2),
|
---|
| 149 | OPT_UNCONDITIONAL = (1 << 3),
|
---|
| 150 | OPT_VERBOSE = (1 << 4),
|
---|
| 151 | OPT_CREATE_LEADING_DIR = (1 << 5),
|
---|
| 152 | OPT_PRESERVE_MTIME = (1 << 6),
|
---|
| 153 | OPT_DEREF = (1 << 7),
|
---|
| 154 | OPT_FILE = (1 << 8),
|
---|
[3621] | 155 | OPT_OWNER = (1 << 9),
|
---|
| 156 | OPTBIT_OWNER = 9,
|
---|
[2725] | 157 | IF_FEATURE_CPIO_O(OPTBIT_CREATE ,)
|
---|
| 158 | IF_FEATURE_CPIO_O(OPTBIT_FORMAT ,)
|
---|
| 159 | IF_FEATURE_CPIO_P(OPTBIT_PASSTHROUGH,)
|
---|
| 160 | IF_LONG_OPTS( OPTBIT_QUIET ,)
|
---|
| 161 | IF_LONG_OPTS( OPTBIT_2STDOUT ,)
|
---|
[3232] | 162 | OPT_CREATE = IF_FEATURE_CPIO_O((1 << OPTBIT_CREATE )) + 0,
|
---|
| 163 | OPT_FORMAT = IF_FEATURE_CPIO_O((1 << OPTBIT_FORMAT )) + 0,
|
---|
| 164 | OPT_PASSTHROUGH = IF_FEATURE_CPIO_P((1 << OPTBIT_PASSTHROUGH)) + 0,
|
---|
| 165 | OPT_QUIET = IF_LONG_OPTS( (1 << OPTBIT_QUIET )) + 0,
|
---|
| 166 | OPT_2STDOUT = IF_LONG_OPTS( (1 << OPTBIT_2STDOUT )) + 0,
|
---|
[2725] | 167 | };
|
---|
| 168 |
|
---|
[3621] | 169 | #define OPTION_STR "it0uvdmLF:R:"
|
---|
[2725] | 170 |
|
---|
[3621] | 171 | struct globals {
|
---|
| 172 | struct bb_uidgid_t owner_ugid;
|
---|
| 173 | } FIX_ALIASING;
|
---|
| 174 | #define G (*(struct globals*)bb_common_bufsiz1)
|
---|
| 175 | void BUG_cpio_globals_too_big(void);
|
---|
| 176 | #define INIT_G() do { \
|
---|
| 177 | setup_common_bufsiz(); \
|
---|
| 178 | G.owner_ugid.uid = -1L; \
|
---|
| 179 | G.owner_ugid.gid = -1L; \
|
---|
| 180 | } while (0)
|
---|
| 181 |
|
---|
[2725] | 182 | #if ENABLE_FEATURE_CPIO_O
|
---|
| 183 | static off_t cpio_pad4(off_t size)
|
---|
[821] | 184 | {
|
---|
[2725] | 185 | int i;
|
---|
| 186 |
|
---|
| 187 | i = (- size) & 3;
|
---|
| 188 | size += i;
|
---|
| 189 | while (--i >= 0)
|
---|
| 190 | bb_putchar('\0');
|
---|
| 191 | return size;
|
---|
| 192 | }
|
---|
| 193 |
|
---|
| 194 | /* Return value will become exit code.
|
---|
| 195 | * It's ok to exit instead of return. */
|
---|
| 196 | static NOINLINE int cpio_o(void)
|
---|
| 197 | {
|
---|
| 198 | struct name_s {
|
---|
| 199 | struct name_s *next;
|
---|
| 200 | char name[1];
|
---|
| 201 | };
|
---|
| 202 | struct inodes_s {
|
---|
| 203 | struct inodes_s *next;
|
---|
| 204 | struct name_s *names;
|
---|
| 205 | struct stat st;
|
---|
| 206 | };
|
---|
| 207 |
|
---|
| 208 | struct inodes_s *links = NULL;
|
---|
| 209 | off_t bytes = 0; /* output bytes count */
|
---|
| 210 |
|
---|
| 211 | while (1) {
|
---|
| 212 | const char *name;
|
---|
| 213 | char *line;
|
---|
| 214 | struct stat st;
|
---|
| 215 |
|
---|
[3232] | 216 | line = (option_mask32 & OPT_NUL_TERMINATED)
|
---|
[2725] | 217 | ? bb_get_chunk_from_file(stdin, NULL)
|
---|
| 218 | : xmalloc_fgetline(stdin);
|
---|
| 219 |
|
---|
| 220 | if (line) {
|
---|
| 221 | /* Strip leading "./[./]..." from the filename */
|
---|
| 222 | name = line;
|
---|
| 223 | while (name[0] == '.' && name[1] == '/') {
|
---|
| 224 | while (*++name == '/')
|
---|
| 225 | continue;
|
---|
| 226 | }
|
---|
| 227 | if (!*name) { /* line is empty */
|
---|
| 228 | free(line);
|
---|
| 229 | continue;
|
---|
| 230 | }
|
---|
[3232] | 231 | if ((option_mask32 & OPT_DEREF)
|
---|
[2725] | 232 | ? stat(name, &st)
|
---|
| 233 | : lstat(name, &st)
|
---|
| 234 | ) {
|
---|
| 235 | abort_cpio_o:
|
---|
| 236 | bb_simple_perror_msg_and_die(name);
|
---|
| 237 | }
|
---|
| 238 |
|
---|
[3621] | 239 | if (G.owner_ugid.uid != (uid_t)-1L)
|
---|
| 240 | st.st_uid = G.owner_ugid.uid;
|
---|
| 241 | if (G.owner_ugid.gid != (gid_t)-1L)
|
---|
| 242 | st.st_gid = G.owner_ugid.gid;
|
---|
| 243 |
|
---|
[2725] | 244 | if (!(S_ISLNK(st.st_mode) || S_ISREG(st.st_mode)))
|
---|
| 245 | st.st_size = 0; /* paranoia */
|
---|
| 246 |
|
---|
| 247 | /* Store hardlinks for later processing, dont output them */
|
---|
| 248 | if (!S_ISDIR(st.st_mode) && st.st_nlink > 1) {
|
---|
| 249 | struct name_s *n;
|
---|
| 250 | struct inodes_s *l;
|
---|
| 251 |
|
---|
| 252 | /* Do we have this hardlink remembered? */
|
---|
| 253 | l = links;
|
---|
| 254 | while (1) {
|
---|
| 255 | if (l == NULL) {
|
---|
| 256 | /* Not found: add new item to "links" list */
|
---|
| 257 | l = xzalloc(sizeof(*l));
|
---|
| 258 | l->st = st;
|
---|
| 259 | l->next = links;
|
---|
| 260 | links = l;
|
---|
| 261 | break;
|
---|
| 262 | }
|
---|
| 263 | if (l->st.st_ino == st.st_ino) {
|
---|
| 264 | /* found */
|
---|
| 265 | break;
|
---|
| 266 | }
|
---|
| 267 | l = l->next;
|
---|
| 268 | }
|
---|
| 269 | /* Add new name to "l->names" list */
|
---|
| 270 | n = xmalloc(sizeof(*n) + strlen(name));
|
---|
| 271 | strcpy(n->name, name);
|
---|
| 272 | n->next = l->names;
|
---|
| 273 | l->names = n;
|
---|
| 274 |
|
---|
| 275 | free(line);
|
---|
| 276 | continue;
|
---|
| 277 | }
|
---|
| 278 | } else { /* line == NULL: EOF */
|
---|
| 279 | next_link:
|
---|
| 280 | if (links) {
|
---|
| 281 | /* Output hardlink's data */
|
---|
| 282 | st = links->st;
|
---|
| 283 | name = links->names->name;
|
---|
| 284 | links->names = links->names->next;
|
---|
| 285 | /* GNU cpio is reported to emit file data
|
---|
| 286 | * only for the last instance. Mimic that. */
|
---|
| 287 | if (links->names == NULL)
|
---|
| 288 | links = links->next;
|
---|
| 289 | else
|
---|
| 290 | st.st_size = 0;
|
---|
| 291 | /* NB: we leak links->names and/or links,
|
---|
| 292 | * this is intended (we exit soon anyway) */
|
---|
| 293 | } else {
|
---|
| 294 | /* If no (more) hardlinks to output,
|
---|
| 295 | * output "trailer" entry */
|
---|
[3621] | 296 | name = cpio_TRAILER;
|
---|
[2725] | 297 | /* st.st_size == 0 is a must, but for uniformity
|
---|
| 298 | * in the output, we zero out everything */
|
---|
| 299 | memset(&st, 0, sizeof(st));
|
---|
| 300 | /* st.st_nlink = 1; - GNU cpio does this */
|
---|
| 301 | }
|
---|
| 302 | }
|
---|
| 303 |
|
---|
| 304 | bytes += printf("070701"
|
---|
[3232] | 305 | "%08X%08X%08X%08X%08X%08X%08X"
|
---|
| 306 | "%08X%08X%08X%08X" /* GNU cpio uses uppercase hex */
|
---|
[2725] | 307 | /* strlen+1: */ "%08X"
|
---|
| 308 | /* chksum: */ "00000000" /* (only for "070702" files) */
|
---|
| 309 | /* name,NUL: */ "%s%c",
|
---|
[3232] | 310 | (unsigned)(uint32_t) st.st_ino,
|
---|
| 311 | (unsigned)(uint32_t) st.st_mode,
|
---|
| 312 | (unsigned)(uint32_t) st.st_uid,
|
---|
| 313 | (unsigned)(uint32_t) st.st_gid,
|
---|
| 314 | (unsigned)(uint32_t) st.st_nlink,
|
---|
| 315 | (unsigned)(uint32_t) st.st_mtime,
|
---|
| 316 | (unsigned)(uint32_t) st.st_size,
|
---|
| 317 | (unsigned)(uint32_t) major(st.st_dev),
|
---|
| 318 | (unsigned)(uint32_t) minor(st.st_dev),
|
---|
| 319 | (unsigned)(uint32_t) major(st.st_rdev),
|
---|
| 320 | (unsigned)(uint32_t) minor(st.st_rdev),
|
---|
| 321 | (unsigned)(strlen(name) + 1),
|
---|
| 322 | name, '\0');
|
---|
[2725] | 323 | bytes = cpio_pad4(bytes);
|
---|
| 324 |
|
---|
| 325 | if (st.st_size) {
|
---|
| 326 | if (S_ISLNK(st.st_mode)) {
|
---|
| 327 | char *lpath = xmalloc_readlink_or_warn(name);
|
---|
| 328 | if (!lpath)
|
---|
| 329 | goto abort_cpio_o;
|
---|
| 330 | bytes += printf("%s", lpath);
|
---|
| 331 | free(lpath);
|
---|
| 332 | } else { /* S_ISREG */
|
---|
| 333 | int fd = xopen(name, O_RDONLY);
|
---|
| 334 | fflush_all();
|
---|
| 335 | /* We must abort if file got shorter too! */
|
---|
| 336 | bb_copyfd_exact_size(fd, STDOUT_FILENO, st.st_size);
|
---|
| 337 | bytes += st.st_size;
|
---|
| 338 | close(fd);
|
---|
| 339 | }
|
---|
| 340 | bytes = cpio_pad4(bytes);
|
---|
| 341 | }
|
---|
| 342 |
|
---|
| 343 | if (!line) {
|
---|
[3621] | 344 | if (name != cpio_TRAILER)
|
---|
[2725] | 345 | goto next_link;
|
---|
| 346 | /* TODO: GNU cpio pads trailer to 512 bytes, do we want that? */
|
---|
| 347 | return EXIT_SUCCESS;
|
---|
| 348 | }
|
---|
| 349 |
|
---|
| 350 | free(line);
|
---|
| 351 | } /* end of "while (1)" */
|
---|
| 352 | }
|
---|
| 353 | #endif
|
---|
| 354 |
|
---|
| 355 | int cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 356 | int cpio_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 357 | {
|
---|
[821] | 358 | archive_handle_t *archive_handle;
|
---|
[2725] | 359 | char *cpio_filename;
|
---|
[3621] | 360 | char *cpio_owner;
|
---|
[2725] | 361 | IF_FEATURE_CPIO_O(const char *cpio_fmt = "";)
|
---|
[1765] | 362 | unsigned opt;
|
---|
[821] | 363 |
|
---|
[2725] | 364 | #if ENABLE_LONG_OPTS
|
---|
| 365 | applet_long_options =
|
---|
| 366 | "extract\0" No_argument "i"
|
---|
| 367 | "list\0" No_argument "t"
|
---|
| 368 | #if ENABLE_FEATURE_CPIO_O
|
---|
| 369 | "create\0" No_argument "o"
|
---|
| 370 | "format\0" Required_argument "H"
|
---|
| 371 | #if ENABLE_FEATURE_CPIO_P
|
---|
| 372 | "pass-through\0" No_argument "p"
|
---|
| 373 | #endif
|
---|
| 374 | #endif
|
---|
[3621] | 375 | "owner\0" Required_argument "R"
|
---|
[2725] | 376 | "verbose\0" No_argument "v"
|
---|
| 377 | "quiet\0" No_argument "\xff"
|
---|
| 378 | "to-stdout\0" No_argument "\xfe"
|
---|
| 379 | ;
|
---|
| 380 | #endif
|
---|
| 381 |
|
---|
[3621] | 382 | INIT_G();
|
---|
[821] | 383 | archive_handle = init_handle();
|
---|
[2725] | 384 | /* archive_handle->src_fd = STDIN_FILENO; - done by init_handle */
|
---|
| 385 | archive_handle->ah_flags = ARCHIVE_EXTRACT_NEWER;
|
---|
[821] | 386 |
|
---|
[2725] | 387 | /* As of now we do not enforce this: */
|
---|
| 388 | /* -i,-t,-o,-p are mutually exclusive */
|
---|
| 389 | /* -u,-d,-m make sense only with -i or -p */
|
---|
| 390 | /* -L makes sense only with -o or -p */
|
---|
[821] | 391 |
|
---|
[2725] | 392 | #if !ENABLE_FEATURE_CPIO_O
|
---|
[3621] | 393 | opt = getopt32(argv, OPTION_STR, &cpio_filename, &cpio_owner);
|
---|
| 394 | #else
|
---|
| 395 | opt = getopt32(argv, OPTION_STR "oH:" IF_FEATURE_CPIO_P("p"),
|
---|
| 396 | &cpio_filename, &cpio_owner, &cpio_fmt);
|
---|
| 397 | #endif
|
---|
[2725] | 398 | argv += optind;
|
---|
[3621] | 399 | if (opt & OPT_OWNER) { /* -R */
|
---|
| 400 | parse_chown_usergroup_or_die(&G.owner_ugid, cpio_owner);
|
---|
| 401 | archive_handle->cpio__owner = G.owner_ugid;
|
---|
| 402 | }
|
---|
| 403 | #if !ENABLE_FEATURE_CPIO_O
|
---|
[3232] | 404 | if (opt & OPT_FILE) { /* -F */
|
---|
[2725] | 405 | xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO);
|
---|
| 406 | }
|
---|
| 407 | #else
|
---|
[3232] | 408 | if ((opt & (OPT_FILE|OPT_CREATE)) == OPT_FILE) { /* -F without -o */
|
---|
[2725] | 409 | xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO);
|
---|
| 410 | }
|
---|
[3232] | 411 | if (opt & OPT_PASSTHROUGH) {
|
---|
[2725] | 412 | pid_t pid;
|
---|
| 413 | struct fd_pair pp;
|
---|
| 414 |
|
---|
| 415 | if (argv[0] == NULL)
|
---|
| 416 | bb_show_usage();
|
---|
[3232] | 417 | if (opt & OPT_CREATE_LEADING_DIR)
|
---|
[2725] | 418 | mkdir(argv[0], 0777);
|
---|
| 419 | /* Crude existence check:
|
---|
| 420 | * close(xopen(argv[0], O_RDONLY | O_DIRECTORY));
|
---|
| 421 | * We can also xopen, fstat, IS_DIR, later fchdir.
|
---|
| 422 | * This would check for existence earlier and cleaner.
|
---|
| 423 | * As it stands now, if we fail xchdir later,
|
---|
| 424 | * child dies on EPIPE, unless it caught
|
---|
| 425 | * a diffrerent problem earlier.
|
---|
| 426 | * This is good enough for now.
|
---|
| 427 | */
|
---|
| 428 | #if !BB_MMU
|
---|
| 429 | pp.rd = 3;
|
---|
| 430 | pp.wr = 4;
|
---|
| 431 | if (!re_execed) {
|
---|
| 432 | close(3);
|
---|
| 433 | close(4);
|
---|
| 434 | xpiped_pair(pp);
|
---|
| 435 | }
|
---|
| 436 | #else
|
---|
| 437 | xpiped_pair(pp);
|
---|
| 438 | #endif
|
---|
| 439 | pid = fork_or_rexec(argv - optind);
|
---|
| 440 | if (pid == 0) { /* child */
|
---|
| 441 | close(pp.rd);
|
---|
| 442 | xmove_fd(pp.wr, STDOUT_FILENO);
|
---|
| 443 | goto dump;
|
---|
| 444 | }
|
---|
| 445 | /* parent */
|
---|
[3232] | 446 | USE_FOR_NOMMU(argv[-optind][0] &= 0x7f); /* undo fork_or_rexec() damage */
|
---|
[2725] | 447 | xchdir(*argv++);
|
---|
| 448 | close(pp.wr);
|
---|
| 449 | xmove_fd(pp.rd, STDIN_FILENO);
|
---|
[3232] | 450 | //opt &= ~OPT_PASSTHROUGH;
|
---|
| 451 | opt |= OPT_EXTRACT;
|
---|
[2725] | 452 | goto skip;
|
---|
| 453 | }
|
---|
| 454 | /* -o */
|
---|
[3232] | 455 | if (opt & OPT_CREATE) {
|
---|
[2725] | 456 | if (cpio_fmt[0] != 'n') /* we _require_ "-H newc" */
|
---|
| 457 | bb_show_usage();
|
---|
[3232] | 458 | if (opt & OPT_FILE) {
|
---|
[2725] | 459 | xmove_fd(xopen(cpio_filename, O_WRONLY | O_CREAT | O_TRUNC), STDOUT_FILENO);
|
---|
| 460 | }
|
---|
| 461 | dump:
|
---|
| 462 | return cpio_o();
|
---|
| 463 | }
|
---|
| 464 | skip:
|
---|
| 465 | #endif
|
---|
| 466 |
|
---|
[821] | 467 | /* One of either extract or test options must be given */
|
---|
[3232] | 468 | if ((opt & (OPT_TEST | OPT_EXTRACT)) == 0) {
|
---|
[821] | 469 | bb_show_usage();
|
---|
| 470 | }
|
---|
| 471 |
|
---|
[3232] | 472 | if (opt & OPT_TEST) {
|
---|
[821] | 473 | /* if both extract and test options are given, ignore extract option */
|
---|
[3232] | 474 | opt &= ~OPT_EXTRACT;
|
---|
[821] | 475 | archive_handle->action_header = header_list;
|
---|
| 476 | }
|
---|
[3232] | 477 | if (opt & OPT_EXTRACT) {
|
---|
[821] | 478 | archive_handle->action_data = data_extract_all;
|
---|
[3232] | 479 | if (opt & OPT_2STDOUT)
|
---|
[2725] | 480 | archive_handle->action_data = data_extract_to_stdout;
|
---|
[821] | 481 | }
|
---|
[3232] | 482 | if (opt & OPT_UNCONDITIONAL) {
|
---|
[2725] | 483 | archive_handle->ah_flags |= ARCHIVE_UNLINK_OLD;
|
---|
| 484 | archive_handle->ah_flags &= ~ARCHIVE_EXTRACT_NEWER;
|
---|
[821] | 485 | }
|
---|
[3232] | 486 | if (opt & OPT_VERBOSE) {
|
---|
[821] | 487 | if (archive_handle->action_header == header_list) {
|
---|
| 488 | archive_handle->action_header = header_verbose_list;
|
---|
| 489 | } else {
|
---|
| 490 | archive_handle->action_header = header_list;
|
---|
| 491 | }
|
---|
| 492 | }
|
---|
[3232] | 493 | if (opt & OPT_CREATE_LEADING_DIR) {
|
---|
[2725] | 494 | archive_handle->ah_flags |= ARCHIVE_CREATE_LEADING_DIRS;
|
---|
[821] | 495 | }
|
---|
[3232] | 496 | if (opt & OPT_PRESERVE_MTIME) {
|
---|
[2725] | 497 | archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE;
|
---|
| 498 | }
|
---|
[821] | 499 |
|
---|
[2725] | 500 | while (*argv) {
|
---|
[821] | 501 | archive_handle->filter = filter_accept_list;
|
---|
[2725] | 502 | llist_add_to(&archive_handle->accept, *argv);
|
---|
| 503 | argv++;
|
---|
[821] | 504 | }
|
---|
| 505 |
|
---|
[2725] | 506 | /* see get_header_cpio */
|
---|
| 507 | archive_handle->cpio__blocks = (off_t)-1;
|
---|
| 508 | while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
|
---|
| 509 | continue;
|
---|
[821] | 510 |
|
---|
[2725] | 511 | if (archive_handle->cpio__blocks != (off_t)-1
|
---|
[3232] | 512 | && !(opt & OPT_QUIET)
|
---|
[2725] | 513 | ) {
|
---|
| 514 | fprintf(stderr, "%"OFF_FMT"u blocks\n", archive_handle->cpio__blocks);
|
---|
| 515 | }
|
---|
| 516 |
|
---|
[1765] | 517 | return EXIT_SUCCESS;
|
---|
[821] | 518 | }
|
---|