* Limitations:
* Doesn't check CRC's
* Only supports new ASCII and CRC formats
- *
*/
#include "libbb.h"
+#include "common_bufsiz.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: "[-dmvu] [-F FILE] [-R USER[:GRP]]" 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: 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: "\n -R USER[:GRP] Set owner of created files"
//usage: IF_FEATURE_CPIO_O(
//usage: "\n -H newc Archive format"
//usage: )
-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
+ -R, --owner=[USER][:.][GRP] Set owner of created files
Options valid in --extract and --pass-through modes:
-d, --make-directories Create leading directories where needed
OPT_PRESERVE_MTIME = (1 << 6),
OPT_DEREF = (1 << 7),
OPT_FILE = (1 << 8),
- OPTBIT_FILE = 8,
+ OPT_OWNER = (1 << 9),
+ OPTBIT_OWNER = 9,
IF_FEATURE_CPIO_O(OPTBIT_CREATE ,)
IF_FEATURE_CPIO_O(OPTBIT_FORMAT ,)
IF_FEATURE_CPIO_P(OPTBIT_PASSTHROUGH,)
OPT_2STDOUT = IF_LONG_OPTS( (1 << OPTBIT_2STDOUT )) + 0,
};
-#define OPTION_STR "it0uvdmLF:"
+#define OPTION_STR "it0uvdmLF:R:"
+
+struct globals {
+ struct bb_uidgid_t owner_ugid;
+} FIX_ALIASING;
+#define G (*(struct globals*)bb_common_bufsiz1)
+void BUG_cpio_globals_too_big(void);
+#define INIT_G() do { \
+ setup_common_bufsiz(); \
+ G.owner_ugid.uid = -1L; \
+ G.owner_ugid.gid = -1L; \
+} while (0)
#if ENABLE_FEATURE_CPIO_O
static off_t cpio_pad4(off_t size)
* It's ok to exit instead of return. */
static NOINLINE int cpio_o(void)
{
- static const char trailer[] ALIGN1 = "TRAILER!!!";
struct name_s {
struct name_s *next;
char name[1];
bb_simple_perror_msg_and_die(name);
}
+ if (G.owner_ugid.uid != (uid_t)-1L)
+ st.st_uid = G.owner_ugid.uid;
+ if (G.owner_ugid.gid != (gid_t)-1L)
+ st.st_gid = G.owner_ugid.gid;
+
if (!(S_ISLNK(st.st_mode) || S_ISREG(st.st_mode)))
st.st_size = 0; /* paranoia */
free(line);
continue;
}
-
} else { /* line == NULL: EOF */
next_link:
if (links) {
} else {
/* If no (more) hardlinks to output,
* output "trailer" entry */
- name = trailer;
+ name = cpio_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) {
}
if (!line) {
- if (name != trailer)
+ if (name != cpio_TRAILER)
goto next_link;
/* TODO: GNU cpio pads trailer to 512 bytes, do we want that? */
return EXIT_SUCCESS;
{
archive_handle_t *archive_handle;
char *cpio_filename;
+ char *cpio_owner;
IF_FEATURE_CPIO_O(const char *cpio_fmt = "";)
unsigned opt;
"pass-through\0" No_argument "p"
#endif
#endif
+ "owner\0" Required_argument "R"
"verbose\0" No_argument "v"
"quiet\0" No_argument "\xff"
"to-stdout\0" No_argument "\xfe"
;
#endif
+ INIT_G();
archive_handle = init_handle();
/* archive_handle->src_fd = STDIN_FILENO; - done by init_handle */
archive_handle->ah_flags = ARCHIVE_EXTRACT_NEWER;
/* -L makes sense only with -o or -p */
#if !ENABLE_FEATURE_CPIO_O
- opt = getopt32(argv, OPTION_STR, &cpio_filename);
+ opt = getopt32(argv, OPTION_STR, &cpio_filename, &cpio_owner);
+#else
+ opt = getopt32(argv, OPTION_STR "oH:" IF_FEATURE_CPIO_P("p"),
+ &cpio_filename, &cpio_owner, &cpio_fmt);
+#endif
argv += optind;
+ if (opt & OPT_OWNER) { /* -R */
+ parse_chown_usergroup_or_die(&G.owner_ugid, cpio_owner);
+ archive_handle->cpio__owner = G.owner_ugid;
+ }
+#if !ENABLE_FEATURE_CPIO_O
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);
}
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);
projects / oweals / busybox.git / blobdiff