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cpio: implement -R/--owner

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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 2015-10-16 17:24:46 +02:00 committed by Denys Vlasenko
parent 93dd9fd90a
commit 2735bc00e3
7 changed files with 58 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
archival/cpio.c
View File

@ -46,7 +46,7 @@
//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"
@ -71,6 +71,7 @@
//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: )
@ -130,7 +131,7 @@
-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
@ -150,7 +151,8 @@ enum {
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,)
@ -163,7 +165,17 @@ enum {
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 { \
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)
@ -181,7 +193,6 @@ 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];
@ -223,6 +234,11 @@ static NOINLINE int cpio_o(void)
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 */
@ -275,7 +291,7 @@ static NOINLINE int cpio_o(void)
} 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));
@ -323,7 +339,7 @@ static NOINLINE int cpio_o(void)
}
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;
@ -339,6 +355,7 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
{
archive_handle_t *archive_handle;
char *cpio_filename;
char *cpio_owner;
IF_FEATURE_CPIO_O(const char *cpio_fmt = "";)
unsigned opt;
@ -353,12 +370,14 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
"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;
@ -369,14 +388,21 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
/* -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);
}

2
archival/libarchive/Kbuild.src
View File

@ -4,7 +4,7 @@
#
# Licensed under GPLv2 or later, see file LICENSE in this source tree.
lib-y:=
lib-y:= common.o
COMMON_FILES:= \
\

9
archival/libarchive/common.c Normal file
View File

@ -0,0 +1,9 @@
/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
#include "bb_archive.h"
const char cpio_TRAILER[] = "TRAILER!!!";

7
archival/libarchive/get_header_cpio.c
View File

@ -52,6 +52,11 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
&major, &minor, &namesize) != 10)
bb_error_msg_and_die("damaged cpio file");
file_header->mode = mode;
/* "cpio -R USER:GRP" support: */
if (archive_handle->cpio__owner.uid != (uid_t)-1L)
uid = archive_handle->cpio__owner.uid;
if (archive_handle->cpio__owner.gid != (gid_t)-1L)
gid = archive_handle->cpio__owner.gid;
file_header->uid = uid;
file_header->gid = gid;
file_header->mtime = mtime;
@ -75,7 +80,7 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
/* Update offset amount and skip padding before file contents */
data_align(archive_handle, 4);
if (strcmp(file_header->name, "TRAILER!!!") == 0) {
if (strcmp(file_header->name, cpio_TRAILER) == 0) {
/* Always round up. ">> 9" divides by 512 */
archive_handle->cpio__blocks = (uoff_t)(archive_handle->offset + 511) >> 9;
goto create_hardlinks;

4
coreutils/chown.c
View File

@ -11,9 +11,9 @@
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
//usage:#define chown_trivial_usage
//usage: "[-Rh"IF_DESKTOP("LHPcvf")"]... OWNER[<.|:>[GROUP]] FILE..."
//usage: "[-Rh"IF_DESKTOP("LHPcvf")"]... USER[:[GRP]] FILE..."
//usage:#define chown_full_usage "\n\n"
//usage: "Change the owner and/or group of each FILE to OWNER and/or GROUP\n"
//usage: "Change the owner and/or group of each FILE to USER and/or GRP\n"
//usage: "\n -R Recurse"
//usage: "\n -h Affect symlinks instead of symlink targets"
//usage: IF_DESKTOP(

3
include/bb_archive.h
View File

@ -95,6 +95,7 @@ typedef struct archive_handle_t {
#endif
#if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
uoff_t cpio__blocks;
struct bb_uidgid_t cpio__owner;
struct hardlinks_t *cpio__hardlinks_to_create;
struct hardlinks_t *cpio__created_hardlinks;
#endif
@ -159,6 +160,8 @@ struct BUG_tar_header {
};
extern const char cpio_TRAILER[];
archive_handle_t *init_handle(void) FAST_FUNC;