*
* Copyright (C) 2001 by Glenn McGrath
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Limitations:
* Doesn't check CRC's
* Only supports new ASCII and CRC formats
- *
*/
#include "libbb.h"
-#include "unarchive.h"
+#include "bb_archive.h"
+
+//config:config CPIO
+//config: bool "cpio"
+//config: default y
+//config: help
+//config: cpio is an archival utility program used to create, modify, and
+//config: extract contents from archives.
+//config: cpio has 110 bytes of overheads for every stored file.
+//config:
+//config: This implementation of cpio can extract cpio archives created in the
+//config: "newc" or "crc" format, it cannot create or modify them.
+//config:
+//config: Unless you have a specific application which requires cpio, you
+//config: should probably say N here.
+//config:
+//config:config FEATURE_CPIO_O
+//config: bool "Support for archive creation"
+//config: default y
+//config: depends on CPIO
+//config: help
+//config: This implementation of cpio can create cpio archives in the "newc"
+//config: format only.
+//config:
+//config:config FEATURE_CPIO_P
+//config: bool "Support for passthrough mode"
+//config: default y
+//config: depends on FEATURE_CPIO_O
+//config: help
+//config: Passthrough mode. Rarely used.
+
+//applet:IF_CPIO(APPLET(cpio, BB_DIR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_CPIO) += cpio.o
+
+//usage:#define cpio_trivial_usage
+//usage: "[-dmvu] [-F FILE]" IF_FEATURE_CPIO_O(" [-H newc]")
+//usage: " [-ti"IF_FEATURE_CPIO_O("o")"]" IF_FEATURE_CPIO_P(" [-p DIR]")
+//usage: " [EXTR_FILE]..."
+//usage:#define cpio_full_usage "\n\n"
+//usage: "Extract or list files from a cpio archive"
+//usage: IF_FEATURE_CPIO_O(", or"
+//usage: "\ncreate an archive" IF_FEATURE_CPIO_P(" (-o) or copy files (-p)")
+//usage: " using file list on stdin"
+//usage: )
+//usage: "\n"
+//usage: "\nMain operation mode:"
+//usage: "\n -t List"
+//usage: "\n -i Extract EXTR_FILEs (or all)"
+//usage: IF_FEATURE_CPIO_O(
+//usage: "\n -o Create (requires -H newc)"
+//usage: )
+//usage: IF_FEATURE_CPIO_P(
+//usage: "\n -p DIR Copy files to DIR"
+//usage: )
+//usage: "\n -d Make leading directories"
+//usage: "\n -m Preserve mtime"
+//usage: "\n -v Verbose"
+//usage: "\n -u Overwrite"
+//usage: "\n -F FILE Input (-t,-i,-p) or output (-o) file"
+//usage: IF_FEATURE_CPIO_O(
+//usage: "\n -H newc Archive format"
+//usage: )
+
+/* GNU cpio 2.9 --help (abridged):
+
+ Modes:
+ -t, --list List the archive
+ -i, --extract Extract files from an archive
+ -o, --create Create the archive
+ -p, --pass-through Copy-pass mode
+
+ Options valid in any mode:
+ --block-size=SIZE I/O block size = SIZE * 512 bytes
+ -B I/O block size = 5120 bytes
+ -c Use the old portable (ASCII) archive format
+ -C, --io-size=NUMBER I/O block size in bytes
+ -f, --nonmatching Only copy files that do not match given pattern
+ -F, --file=FILE Use FILE instead of standard input or output
+ -H, --format=FORMAT Use given archive FORMAT
+ -M, --message=STRING Print STRING when the end of a volume of the
+ backup media is reached
+ -n, --numeric-uid-gid If -v, show numeric UID and GID
+ --quiet Do not print the number of blocks copied
+ --rsh-command=COMMAND Use remote COMMAND instead of rsh
+ -v, --verbose Verbosely list the files processed
+ -V, --dot Print a "." for each file processed
+ -W, --warning=FLAG Control warning display: 'none','truncate','all';
+ multiple options accumulate
+
+ Options valid only in --extract mode:
+ -b, --swap Swap both halfwords of words and bytes of
+ halfwords in the data (equivalent to -sS)
+ -r, --rename Interactively rename files
+ -s, --swap-bytes Swap the bytes of each halfword in the files
+ -S, --swap-halfwords Swap the halfwords of each word (4 bytes)
+ --to-stdout Extract files to standard output
+ -E, --pattern-file=FILE Read additional patterns specifying filenames to
+ extract or list from FILE
+ --only-verify-crc Verify CRC's, don't actually extract the files
+
+ Options valid only in --create mode:
+ -A, --append Append to an existing archive
+ -O FILE File to use instead of standard output
+
+ Options valid only in --pass-through mode:
+ -l, --link Link files instead of copying them, when possible
+
+ Options valid in --extract and --create modes:
+ --absolute-filenames Do not strip file system prefix components from
+ the file names
+ --no-absolute-filenames Create all files relative to the current dir
+
+ Options valid in --create and --pass-through modes:
+ -0, --null A list of filenames is terminated by a NUL
+ -a, --reset-access-time Reset the access times of files after reading them
+ -I FILE File to use instead of standard input
+ -L, --dereference Dereference symbolic links (copy the files
+ that they point to instead of copying the links)
+ -R, --owner=[USER][:.][GROUP] Set owner of created files
+
+ Options valid in --extract and --pass-through modes:
+ -d, --make-directories Create leading directories where needed
+ -m, --preserve-modification-time Retain mtime when creating files
+ --no-preserve-owner Do not change the ownership of the files
+ --sparse Write files with blocks of zeros as sparse files
+ -u, --unconditional Replace all files unconditionally
+ */
enum {
- CPIO_OPT_EXTRACT = (1 << 0),
- CPIO_OPT_TEST = (1 << 1),
- CPIO_OPT_UNCONDITIONAL = (1 << 2),
- CPIO_OPT_VERBOSE = (1 << 3),
- CPIO_OPT_FILE = (1 << 4),
- CPIO_OPT_CREATE_LEADING_DIR = (1 << 5),
- CPIO_OPT_PRESERVE_MTIME = (1 << 6),
- CPIO_OPT_CREATE = (1 << 7),
- CPIO_OPT_FORMAT = (1 << 8),
+ OPT_EXTRACT = (1 << 0),
+ OPT_TEST = (1 << 1),
+ OPT_NUL_TERMINATED = (1 << 2),
+ OPT_UNCONDITIONAL = (1 << 3),
+ OPT_VERBOSE = (1 << 4),
+ OPT_CREATE_LEADING_DIR = (1 << 5),
+ OPT_PRESERVE_MTIME = (1 << 6),
+ OPT_DEREF = (1 << 7),
+ OPT_FILE = (1 << 8),
+ OPTBIT_FILE = 8,
+ IF_FEATURE_CPIO_O(OPTBIT_CREATE ,)
+ IF_FEATURE_CPIO_O(OPTBIT_FORMAT ,)
+ IF_FEATURE_CPIO_P(OPTBIT_PASSTHROUGH,)
+ IF_LONG_OPTS( OPTBIT_QUIET ,)
+ IF_LONG_OPTS( OPTBIT_2STDOUT ,)
+ OPT_CREATE = IF_FEATURE_CPIO_O((1 << OPTBIT_CREATE )) + 0,
+ OPT_FORMAT = IF_FEATURE_CPIO_O((1 << OPTBIT_FORMAT )) + 0,
+ OPT_PASSTHROUGH = IF_FEATURE_CPIO_P((1 << OPTBIT_PASSTHROUGH)) + 0,
+ OPT_QUIET = IF_LONG_OPTS( (1 << OPTBIT_QUIET )) + 0,
+ OPT_2STDOUT = IF_LONG_OPTS( (1 << OPTBIT_2STDOUT )) + 0,
};
+#define OPTION_STR "it0uvdmLF:"
+
#if ENABLE_FEATURE_CPIO_O
static off_t cpio_pad4(off_t size)
{
/* Return value will become exit code.
* It's ok to exit instead of return. */
-static int cpio_o(void)
+static NOINLINE int cpio_o(void)
{
+ static const char trailer[] ALIGN1 = "TRAILER!!!";
struct name_s {
struct name_s *next;
char name[1];
char *line;
struct stat st;
- line = xmalloc_fgetline(stdin);
+ line = (option_mask32 & OPT_NUL_TERMINATED)
+ ? bb_get_chunk_from_file(stdin, NULL)
+ : xmalloc_fgetline(stdin);
if (line) {
/* Strip leading "./[./]..." from the filename */
free(line);
continue;
}
- if (lstat(name, &st)) {
+ if ((option_mask32 & OPT_DEREF)
+ ? stat(name, &st)
+ : lstat(name, &st)
+ ) {
abort_cpio_o:
bb_simple_perror_msg_and_die(name);
}
} else {
/* If no (more) hardlinks to output,
* output "trailer" entry */
- name = "TRAILER!!!";
+ name = trailer;
/* st.st_size == 0 is a must, but for uniformity
* in the output, we zero out everything */
memset(&st, 0, sizeof(st));
}
bytes += printf("070701"
- "%08X%08X%08X%08X%08X%08X%08X"
- "%08X%08X%08X%08X" /* GNU cpio uses uppercase hex */
+ "%08X%08X%08X%08X%08X%08X%08X"
+ "%08X%08X%08X%08X" /* GNU cpio uses uppercase hex */
/* strlen+1: */ "%08X"
/* chksum: */ "00000000" /* (only for "070702" files) */
/* name,NUL: */ "%s%c",
- (unsigned)(uint32_t) st.st_ino,
- (unsigned)(uint32_t) st.st_mode,
- (unsigned)(uint32_t) st.st_uid,
- (unsigned)(uint32_t) st.st_gid,
- (unsigned)(uint32_t) st.st_nlink,
- (unsigned)(uint32_t) st.st_mtime,
- (unsigned)(uint32_t) st.st_size,
- (unsigned)(uint32_t) major(st.st_dev),
- (unsigned)(uint32_t) minor(st.st_dev),
- (unsigned)(uint32_t) major(st.st_rdev),
- (unsigned)(uint32_t) minor(st.st_rdev),
- (unsigned)(strlen(name) + 1),
- name, '\0');
+ (unsigned)(uint32_t) st.st_ino,
+ (unsigned)(uint32_t) st.st_mode,
+ (unsigned)(uint32_t) st.st_uid,
+ (unsigned)(uint32_t) st.st_gid,
+ (unsigned)(uint32_t) st.st_nlink,
+ (unsigned)(uint32_t) st.st_mtime,
+ (unsigned)(uint32_t) st.st_size,
+ (unsigned)(uint32_t) major(st.st_dev),
+ (unsigned)(uint32_t) minor(st.st_dev),
+ (unsigned)(uint32_t) major(st.st_rdev),
+ (unsigned)(uint32_t) minor(st.st_rdev),
+ (unsigned)(strlen(name) + 1),
+ name, '\0');
bytes = cpio_pad4(bytes);
if (st.st_size) {
free(lpath);
} else { /* S_ISREG */
int fd = xopen(name, O_RDONLY);
- fflush(stdout);
+ fflush_all();
/* We must abort if file got shorter too! */
bb_copyfd_exact_size(fd, STDOUT_FILENO, st.st_size);
bytes += st.st_size;
}
if (!line) {
- if (links)
+ if (name != trailer)
goto next_link;
/* TODO: GNU cpio pads trailer to 512 bytes, do we want that? */
return EXIT_SUCCESS;
#endif
int cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cpio_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int cpio_main(int argc UNUSED_PARAM, char **argv)
{
archive_handle_t *archive_handle;
char *cpio_filename;
+ IF_FEATURE_CPIO_O(const char *cpio_fmt = "";)
+ unsigned opt;
+
+#if ENABLE_LONG_OPTS
+ applet_long_options =
+ "extract\0" No_argument "i"
+ "list\0" No_argument "t"
#if ENABLE_FEATURE_CPIO_O
- const char *cpio_fmt = "";
+ "create\0" No_argument "o"
+ "format\0" Required_argument "H"
+#if ENABLE_FEATURE_CPIO_P
+ "pass-through\0" No_argument "p"
+#endif
+#endif
+ "verbose\0" No_argument "v"
+ "quiet\0" No_argument "\xff"
+ "to-stdout\0" No_argument "\xfe"
+ ;
#endif
- unsigned opt;
- /* Initialize */
archive_handle = init_handle();
- archive_handle->src_fd = STDIN_FILENO;
- archive_handle->seek = seek_by_read;
- archive_handle->flags = ARCHIVE_EXTRACT_NEWER;
+ /* archive_handle->src_fd = STDIN_FILENO; - done by init_handle */
+ archive_handle->ah_flags = ARCHIVE_EXTRACT_NEWER;
-#if ENABLE_FEATURE_CPIO_O
- opt = getopt32(argv, "ituvF:dmoH:", &cpio_filename, &cpio_fmt);
+ /* As of now we do not enforce this: */
+ /* -i,-t,-o,-p are mutually exclusive */
+ /* -u,-d,-m make sense only with -i or -p */
+ /* -L makes sense only with -o or -p */
+
+#if !ENABLE_FEATURE_CPIO_O
+ opt = getopt32(argv, OPTION_STR, &cpio_filename);
+ argv += optind;
+ if (opt & OPT_FILE) { /* -F */
+ xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO);
+ }
+#else
+ opt = getopt32(argv, OPTION_STR "oH:" IF_FEATURE_CPIO_P("p"), &cpio_filename, &cpio_fmt);
+ argv += optind;
+ if ((opt & (OPT_FILE|OPT_CREATE)) == OPT_FILE) { /* -F without -o */
+ xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO);
+ }
+ if (opt & OPT_PASSTHROUGH) {
+ pid_t pid;
+ struct fd_pair pp;
- if (opt & CPIO_OPT_CREATE) {
- if (*cpio_fmt != 'n')
+ if (argv[0] == NULL)
bb_show_usage();
- if (opt & CPIO_OPT_FILE) {
- fclose(stdout);
- stdout = fopen(cpio_filename, "w");
- /* Paranoia: I don't trust libc that much */
- xdup2(fileno(stdout), STDOUT_FILENO);
+ if (opt & OPT_CREATE_LEADING_DIR)
+ mkdir(argv[0], 0777);
+ /* Crude existence check:
+ * close(xopen(argv[0], O_RDONLY | O_DIRECTORY));
+ * We can also xopen, fstat, IS_DIR, later fchdir.
+ * This would check for existence earlier and cleaner.
+ * As it stands now, if we fail xchdir later,
+ * child dies on EPIPE, unless it caught
+ * a diffrerent problem earlier.
+ * This is good enough for now.
+ */
+#if !BB_MMU
+ pp.rd = 3;
+ pp.wr = 4;
+ if (!re_execed) {
+ close(3);
+ close(4);
+ xpiped_pair(pp);
+ }
+#else
+ xpiped_pair(pp);
+#endif
+ pid = fork_or_rexec(argv - optind);
+ if (pid == 0) { /* child */
+ close(pp.rd);
+ xmove_fd(pp.wr, STDOUT_FILENO);
+ goto dump;
}
+ /* parent */
+ USE_FOR_NOMMU(argv[-optind][0] &= 0x7f); /* undo fork_or_rexec() damage */
+ xchdir(*argv++);
+ close(pp.wr);
+ xmove_fd(pp.rd, STDIN_FILENO);
+ //opt &= ~OPT_PASSTHROUGH;
+ opt |= OPT_EXTRACT;
+ goto skip;
+ }
+ /* -o */
+ if (opt & OPT_CREATE) {
+ if (cpio_fmt[0] != 'n') /* we _require_ "-H newc" */
+ bb_show_usage();
+ if (opt & OPT_FILE) {
+ xmove_fd(xopen(cpio_filename, O_WRONLY | O_CREAT | O_TRUNC), STDOUT_FILENO);
+ }
+ dump:
return cpio_o();
}
-#else
- opt = getopt32(argv, "ituvF:dm", &cpio_filename);
+ skip:
#endif
- argv += optind;
/* One of either extract or test options must be given */
- if ((opt & (CPIO_OPT_TEST | CPIO_OPT_EXTRACT)) == 0) {
+ if ((opt & (OPT_TEST | OPT_EXTRACT)) == 0) {
bb_show_usage();
}
- if (opt & CPIO_OPT_TEST) {
+ if (opt & OPT_TEST) {
/* if both extract and test options are given, ignore extract option */
- if (opt & CPIO_OPT_EXTRACT) {
- opt &= ~CPIO_OPT_EXTRACT;
- }
+ opt &= ~OPT_EXTRACT;
archive_handle->action_header = header_list;
}
- if (opt & CPIO_OPT_EXTRACT) {
+ if (opt & OPT_EXTRACT) {
archive_handle->action_data = data_extract_all;
+ if (opt & OPT_2STDOUT)
+ archive_handle->action_data = data_extract_to_stdout;
}
- if (opt & CPIO_OPT_UNCONDITIONAL) {
- archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
- archive_handle->flags &= ~ARCHIVE_EXTRACT_NEWER;
+ if (opt & OPT_UNCONDITIONAL) {
+ archive_handle->ah_flags |= ARCHIVE_UNLINK_OLD;
+ archive_handle->ah_flags &= ~ARCHIVE_EXTRACT_NEWER;
}
- if (opt & CPIO_OPT_VERBOSE) {
+ if (opt & OPT_VERBOSE) {
if (archive_handle->action_header == header_list) {
archive_handle->action_header = header_verbose_list;
} else {
archive_handle->action_header = header_list;
}
}
- if (opt & CPIO_OPT_FILE) { /* -F */
- archive_handle->src_fd = xopen(cpio_filename, O_RDONLY);
- archive_handle->seek = seek_by_jump;
- }
- if (opt & CPIO_OPT_CREATE_LEADING_DIR) {
- archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
+ if (opt & OPT_CREATE_LEADING_DIR) {
+ archive_handle->ah_flags |= ARCHIVE_CREATE_LEADING_DIRS;
}
- if (opt & CPIO_OPT_PRESERVE_MTIME) {
- archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
+ if (opt & OPT_PRESERVE_MTIME) {
+ archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE;
}
while (*argv) {
archive_handle->filter = filter_accept_list;
- llist_add_to(&(archive_handle->accept), *argv);
+ llist_add_to(&archive_handle->accept, *argv);
argv++;
}
+ /* see get_header_cpio */
+ archive_handle->cpio__blocks = (off_t)-1;
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
continue;
+ if (archive_handle->cpio__blocks != (off_t)-1
+ && !(opt & OPT_QUIET)
+ ) {
+ fprintf(stderr, "%"OFF_FMT"u blocks\n", archive_handle->cpio__blocks);
+ }
+
return EXIT_SUCCESS;
}
projects / platform / upstream / busybox.git / blobdiff