diff options
author | Denys Vlasenko <vda.linux@googlemail.com> | 2010-12-26 04:22:51 +0300 |
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committer | Denys Vlasenko <vda.linux@googlemail.com> | 2010-12-26 04:22:51 +0300 |
commit | 1f937d64686d9a71c9325f2e9b23eba235a9255e (patch) | |
tree | 3e29f011ed2cb42a3da8ba751b392cb961779a82 /archival | |
parent | e4e911e7124fca9116ca14c31f125b687d0ae57e (diff) |
cpio: allow cpio -i to take params - names of files to extract
Also, improve help text
function old new delta
packed_usage 28028 28035 +7
cpio_main 542 532 -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 7/-10) Total: -3 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'archival')
-rw-r--r-- | archival/cpio.c | 105 |
1 files changed, 66 insertions, 39 deletions
diff --git a/archival/cpio.c b/archival/cpio.c index 6ab268821..c746a71fa 100644 --- a/archival/cpio.c +++ b/archival/cpio.c @@ -14,13 +14,43 @@ #include "libbb.h" #include "archive.h" +//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: "\nOptions:" +//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 [was ist das?!] + -p, --pass-through Copy-pass mode Options valid in any mode: --block-size=SIZE I/O block size = SIZE * 512 bytes @@ -78,27 +108,28 @@ --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_NUL_TERMINATED = (1 << 2), - CPIO_OPT_UNCONDITIONAL = (1 << 3), - CPIO_OPT_VERBOSE = (1 << 4), - CPIO_OPT_CREATE_LEADING_DIR = (1 << 5), - CPIO_OPT_PRESERVE_MTIME = (1 << 6), - CPIO_OPT_DEREF = (1 << 7), - CPIO_OPT_FILE = (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 ,) - CPIO_OPT_CREATE = IF_FEATURE_CPIO_O((1 << OPTBIT_CREATE )) + 0, - CPIO_OPT_FORMAT = IF_FEATURE_CPIO_O((1 << OPTBIT_FORMAT )) + 0, - CPIO_OPT_PASSTHROUGH = IF_FEATURE_CPIO_P((1 << OPTBIT_PASSTHROUGH)) + 0, - CPIO_OPT_QUIET = IF_LONG_OPTS( (1 << OPTBIT_QUIET )) + 0, - CPIO_OPT_2STDOUT = IF_LONG_OPTS( (1 << OPTBIT_2STDOUT )) + 0, + 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:" @@ -138,7 +169,7 @@ static NOINLINE int cpio_o(void) char *line; struct stat st; - line = (option_mask32 & CPIO_OPT_NUL_TERMINATED) + line = (option_mask32 & OPT_NUL_TERMINATED) ? bb_get_chunk_from_file(stdin, NULL) : xmalloc_fgetline(stdin); @@ -153,7 +184,7 @@ static NOINLINE int cpio_o(void) free(line); continue; } - if ((option_mask32 & CPIO_OPT_DEREF) + if ((option_mask32 & OPT_DEREF) ? stat(name, &st) : lstat(name, &st) ) { @@ -308,28 +339,24 @@ int cpio_main(int argc UNUSED_PARAM, char **argv) /* -L makes sense only with -o or -p */ #if !ENABLE_FEATURE_CPIO_O - /* no parameters */ - opt_complementary = "=0"; opt = getopt32(argv, OPTION_STR, &cpio_filename); argv += optind; - if (opt & CPIO_OPT_FILE) { /* -F */ + if (opt & OPT_FILE) { /* -F */ xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO); } #else - /* _exactly_ one parameter for -p, thus <= 1 param if -p is allowed */ - opt_complementary = ENABLE_FEATURE_CPIO_P ? "?1" : "=0"; opt = getopt32(argv, OPTION_STR "oH:" IF_FEATURE_CPIO_P("p"), &cpio_filename, &cpio_fmt); argv += optind; - if ((opt & (CPIO_OPT_FILE|CPIO_OPT_CREATE)) == CPIO_OPT_FILE) { /* -F without -o */ + if ((opt & (OPT_FILE|OPT_CREATE)) == OPT_FILE) { /* -F without -o */ xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO); } - if (opt & CPIO_OPT_PASSTHROUGH) { + if (opt & OPT_PASSTHROUGH) { pid_t pid; struct fd_pair pp; if (argv[0] == NULL) bb_show_usage(); - if (opt & CPIO_OPT_CREATE_LEADING_DIR) + if (opt & OPT_CREATE_LEADING_DIR) mkdir(argv[0], 0777); /* Crude existence check: * close(xopen(argv[0], O_RDONLY | O_DIRECTORY)); @@ -361,15 +388,15 @@ int cpio_main(int argc UNUSED_PARAM, char **argv) xchdir(*argv++); close(pp.wr); xmove_fd(pp.rd, STDIN_FILENO); - //opt &= ~CPIO_OPT_PASSTHROUGH; - opt |= CPIO_OPT_EXTRACT; + //opt &= ~OPT_PASSTHROUGH; + opt |= OPT_EXTRACT; goto skip; } /* -o */ - if (opt & CPIO_OPT_CREATE) { + if (opt & OPT_CREATE) { if (cpio_fmt[0] != 'n') /* we _require_ "-H newc" */ bb_show_usage(); - if (opt & CPIO_OPT_FILE) { + if (opt & OPT_FILE) { xmove_fd(xopen(cpio_filename, O_WRONLY | O_CREAT | O_TRUNC), STDOUT_FILENO); } dump: @@ -379,35 +406,35 @@ int cpio_main(int argc UNUSED_PARAM, char **argv) #endif /* 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 */ - 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 & CPIO_OPT_2STDOUT) + if (opt & OPT_2STDOUT) archive_handle->action_data = data_extract_to_stdout; } - if (opt & CPIO_OPT_UNCONDITIONAL) { + 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_CREATE_LEADING_DIR) { + if (opt & OPT_CREATE_LEADING_DIR) { archive_handle->ah_flags |= ARCHIVE_CREATE_LEADING_DIRS; } - if (opt & CPIO_OPT_PRESERVE_MTIME) { + if (opt & OPT_PRESERVE_MTIME) { archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE; } @@ -423,7 +450,7 @@ int cpio_main(int argc UNUSED_PARAM, char **argv) continue; if (archive_handle->cpio__blocks != (off_t)-1 - && !(opt & CPIO_OPT_QUIET) + && !(opt & OPT_QUIET) ) { fprintf(stderr, "%"OFF_FMT"u blocks\n", archive_handle->cpio__blocks); } |