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cpio: implement -R/--owner
Implement -R/--owner to force ownership of files. function old new delta cpio_main 532 586 +54 get_header_cpio 909 939 +30 print 36 65 +29 cpio_o 804 832 +28 cpio_TRAILER - 11 +11 packed_usage 30667 30662 -5 static.trailer 11 - -11 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 4/1 up/down: 152/-16) Total: 136 bytes Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Aaro Koskinen
Denys Vlasenko
parent
93dd9fd90a
commit
2735bc00e3
@ -4,7 +4,7 @@
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#
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# Licensed under GPLv2, see file LICENSE in this source tree.
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libs-y += libarchive/
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libs-y += libarchive/
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lib-y:=
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@ -46,7 +46,7 @@
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//kbuild:lib-$(CONFIG_CPIO) += cpio.o
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//usage:#define cpio_trivial_usage
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//usage: "[-dmvu] [-F FILE]" IF_FEATURE_CPIO_O(" [-H newc]")
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//usage: "[-dmvu] [-F FILE] [-R USER[:GRP]]" IF_FEATURE_CPIO_O(" [-H newc]")
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//usage: " [-ti"IF_FEATURE_CPIO_O("o")"]" IF_FEATURE_CPIO_P(" [-p DIR]")
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//usage: " [EXTR_FILE]..."
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//usage:#define cpio_full_usage "\n\n"
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@ -71,6 +71,7 @@
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//usage: "\n -v Verbose"
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//usage: "\n -u Overwrite"
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//usage: "\n -F FILE Input (-t,-i,-p) or output (-o) file"
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//usage: "\n -R USER[:GRP] Set owner of created files"
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//usage: IF_FEATURE_CPIO_O(
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//usage: "\n -H newc Archive format"
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//usage: )
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@ -130,7 +131,7 @@
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-I FILE File to use instead of standard input
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-L, --dereference Dereference symbolic links (copy the files
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that they point to instead of copying the links)
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-R, --owner=[USER][:.][GROUP] Set owner of created files
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-R, --owner=[USER][:.][GRP] Set owner of created files
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Options valid in --extract and --pass-through modes:
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-d, --make-directories Create leading directories where needed
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@ -150,7 +151,8 @@ enum {
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OPT_PRESERVE_MTIME = (1 << 6),
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OPT_DEREF = (1 << 7),
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OPT_FILE = (1 << 8),
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OPTBIT_FILE = 8,
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OPT_OWNER = (1 << 9),
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OPTBIT_OWNER = 9,
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IF_FEATURE_CPIO_O(OPTBIT_CREATE ,)
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IF_FEATURE_CPIO_O(OPTBIT_FORMAT ,)
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IF_FEATURE_CPIO_P(OPTBIT_PASSTHROUGH,)
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@ -163,7 +165,17 @@ enum {
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OPT_2STDOUT = IF_LONG_OPTS( (1 << OPTBIT_2STDOUT )) + 0,
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};
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#define OPTION_STR "it0uvdmLF:"
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#define OPTION_STR "it0uvdmLF:R:"
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struct globals {
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struct bb_uidgid_t owner_ugid;
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} FIX_ALIASING;
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#define G (*(struct globals*)&bb_common_bufsiz1)
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void BUG_cpio_globals_too_big(void);
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#define INIT_G() do { \
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G.owner_ugid.uid = -1L; \
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G.owner_ugid.gid = -1L; \
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} while (0)
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#if ENABLE_FEATURE_CPIO_O
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static off_t cpio_pad4(off_t size)
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@ -181,7 +193,6 @@ static off_t cpio_pad4(off_t size)
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* It's ok to exit instead of return. */
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static NOINLINE int cpio_o(void)
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{
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static const char trailer[] ALIGN1 = "TRAILER!!!";
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struct name_s {
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struct name_s *next;
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char name[1];
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@ -223,6 +234,11 @@ static NOINLINE int cpio_o(void)
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bb_simple_perror_msg_and_die(name);
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}
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if (G.owner_ugid.uid != (uid_t)-1L)
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st.st_uid = G.owner_ugid.uid;
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if (G.owner_ugid.gid != (gid_t)-1L)
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st.st_gid = G.owner_ugid.gid;
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if (!(S_ISLNK(st.st_mode) || S_ISREG(st.st_mode)))
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st.st_size = 0; /* paranoia */
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@ -275,7 +291,7 @@ static NOINLINE int cpio_o(void)
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} else {
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/* If no (more) hardlinks to output,
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* output "trailer" entry */
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name = trailer;
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name = cpio_TRAILER;
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/* st.st_size == 0 is a must, but for uniformity
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* in the output, we zero out everything */
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memset(&st, 0, sizeof(st));
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@ -323,7 +339,7 @@ static NOINLINE int cpio_o(void)
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}
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if (!line) {
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if (name != trailer)
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if (name != cpio_TRAILER)
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goto next_link;
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/* TODO: GNU cpio pads trailer to 512 bytes, do we want that? */
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return EXIT_SUCCESS;
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@ -339,6 +355,7 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
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{
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archive_handle_t *archive_handle;
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char *cpio_filename;
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char *cpio_owner;
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IF_FEATURE_CPIO_O(const char *cpio_fmt = "";)
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unsigned opt;
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@ -353,12 +370,14 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
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"pass-through\0" No_argument "p"
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#endif
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#endif
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"owner\0" Required_argument "R"
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"verbose\0" No_argument "v"
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"quiet\0" No_argument "\xff"
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"to-stdout\0" No_argument "\xfe"
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;
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#endif
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INIT_G();
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archive_handle = init_handle();
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/* archive_handle->src_fd = STDIN_FILENO; - done by init_handle */
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archive_handle->ah_flags = ARCHIVE_EXTRACT_NEWER;
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@ -369,14 +388,21 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
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/* -L makes sense only with -o or -p */
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#if !ENABLE_FEATURE_CPIO_O
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opt = getopt32(argv, OPTION_STR, &cpio_filename);
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opt = getopt32(argv, OPTION_STR, &cpio_filename, &cpio_owner);
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#else
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opt = getopt32(argv, OPTION_STR "oH:" IF_FEATURE_CPIO_P("p"),
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&cpio_filename, &cpio_owner, &cpio_fmt);
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#endif
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argv += optind;
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if (opt & OPT_OWNER) { /* -R */
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parse_chown_usergroup_or_die(&G.owner_ugid, cpio_owner);
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archive_handle->cpio__owner = G.owner_ugid;
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}
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#if !ENABLE_FEATURE_CPIO_O
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if (opt & OPT_FILE) { /* -F */
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xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO);
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}
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#else
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opt = getopt32(argv, OPTION_STR "oH:" IF_FEATURE_CPIO_P("p"), &cpio_filename, &cpio_fmt);
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argv += optind;
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if ((opt & (OPT_FILE|OPT_CREATE)) == OPT_FILE) { /* -F without -o */
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xmove_fd(xopen(cpio_filename, O_RDONLY), STDIN_FILENO);
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}
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@ -4,7 +4,7 @@
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#
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# Licensed under GPLv2 or later, see file LICENSE in this source tree.
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lib-y:=
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lib-y:= common.o
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COMMON_FILES:= \
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\
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9
archival/libarchive/common.c
Normal file
9
archival/libarchive/common.c
Normal file
@ -0,0 +1,9 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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#include "bb_archive.h"
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const char cpio_TRAILER[] = "TRAILER!!!";
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@ -52,6 +52,11 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
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&major, &minor, &namesize) != 10)
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bb_error_msg_and_die("damaged cpio file");
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file_header->mode = mode;
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/* "cpio -R USER:GRP" support: */
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if (archive_handle->cpio__owner.uid != (uid_t)-1L)
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uid = archive_handle->cpio__owner.uid;
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if (archive_handle->cpio__owner.gid != (gid_t)-1L)
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gid = archive_handle->cpio__owner.gid;
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file_header->uid = uid;
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file_header->gid = gid;
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file_header->mtime = mtime;
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@ -75,7 +80,7 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
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/* Update offset amount and skip padding before file contents */
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data_align(archive_handle, 4);
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if (strcmp(file_header->name, "TRAILER!!!") == 0) {
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if (strcmp(file_header->name, cpio_TRAILER) == 0) {
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/* Always round up. ">> 9" divides by 512 */
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archive_handle->cpio__blocks = (uoff_t)(archive_handle->offset + 511) >> 9;
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goto create_hardlinks;
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@ -11,9 +11,9 @@
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
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//usage:#define chown_trivial_usage
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//usage: "[-Rh"IF_DESKTOP("LHPcvf")"]... OWNER[<.|:>[GROUP]] FILE..."
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//usage: "[-Rh"IF_DESKTOP("LHPcvf")"]... USER[:[GRP]] FILE..."
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//usage:#define chown_full_usage "\n\n"
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//usage: "Change the owner and/or group of each FILE to OWNER and/or GROUP\n"
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//usage: "Change the owner and/or group of each FILE to USER and/or GRP\n"
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//usage: "\n -R Recurse"
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//usage: "\n -h Affect symlinks instead of symlink targets"
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//usage: IF_DESKTOP(
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@ -95,6 +95,7 @@ typedef struct archive_handle_t {
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#endif
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#if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
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uoff_t cpio__blocks;
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struct bb_uidgid_t cpio__owner;
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struct hardlinks_t *cpio__hardlinks_to_create;
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struct hardlinks_t *cpio__created_hardlinks;
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#endif
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@ -159,6 +160,8 @@ struct BUG_tar_header {
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};
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extern const char cpio_TRAILER[];
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archive_handle_t *init_handle(void) FAST_FUNC;
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