*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
/* TODO: security with -C DESTDIR option can be enhanced.
* Consider tar file created via:
* $ tar cvf bug.tar anything.txt
* This doesn't feel right, and IIRC GNU tar doesn't do that.
*/
+//config:config TAR
+//config: bool "tar"
+//config: default y
+//config: help
+//config: tar is an archiving program. It's commonly used with gzip to
+//config: create compressed archives. It's probably the most widely used
+//config: UNIX archive program.
+//config:
+//config:config FEATURE_TAR_CREATE
+//config: bool "Enable archive creation"
+//config: default y
+//config: depends on TAR
+//config: help
+//config: If you enable this option you'll be able to create
+//config: tar archives using the `-c' option.
+//config:
+//config:config FEATURE_TAR_AUTODETECT
+//config: bool "Autodetect compressed tarballs"
+//config: default y
+//config: depends on TAR && (FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA || FEATURE_SEAMLESS_XZ)
+//config: help
+//config: With this option tar can automatically detect compressed
+//config: tarballs. Currently it works only on files (not pipes etc).
+//config:
+//config:config FEATURE_TAR_FROM
+//config: bool "Enable -X (exclude from) and -T (include from) options)"
+//config: default y
+//config: depends on TAR
+//config: help
+//config: If you enable this option you'll be able to specify
+//config: a list of files to include or exclude from an archive.
+//config:
+//config:config FEATURE_TAR_OLDGNU_COMPATIBILITY
+//config: bool "Support for old tar header format"
+//config: default y
+//config: depends on TAR || DPKG
+//config: help
+//config: This option is required to unpack archives created in
+//config: the old GNU format; help to kill this old format by
+//config: repacking your ancient archives with the new format.
+//config:
+//config:config FEATURE_TAR_OLDSUN_COMPATIBILITY
+//config: bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
+//config: default y
+//config: depends on TAR || DPKG
+//config: help
+//config: This option is required to unpack archives created by some old
+//config: version of Sun's tar (it was calculating checksum using signed
+//config: arithmetic). It is said to be fixed in newer Sun tar, but "old"
+//config: tarballs still exist.
+//config:
+//config:config FEATURE_TAR_GNU_EXTENSIONS
+//config: bool "Support for GNU tar extensions (long filenames)"
+//config: default y
+//config: depends on TAR || DPKG
+//config: help
+//config: With this option busybox supports GNU long filenames and
+//config: linknames.
+//config:
+//config:config FEATURE_TAR_LONG_OPTIONS
+//config: bool "Enable long options"
+//config: default y
+//config: depends on TAR && LONG_OPTS
+//config: help
+//config: Enable use of long options, increases size by about 400 Bytes
+//config:
+//config:config FEATURE_TAR_TO_COMMAND
+//config: bool "Support for writing to an external program"
+//config: default y
+//config: depends on TAR && FEATURE_TAR_LONG_OPTIONS
+//config: help
+//config: If you enable this option you'll be able to instruct tar to send
+//config: the contents of each extracted file to the standard input of an
+//config: external program.
+//config:
+//config:config FEATURE_TAR_UNAME_GNAME
+//config: bool "Enable use of user and group names"
+//config: default y
+//config: depends on TAR
+//config: help
+//config: Enables use of user and group names in tar. This affects contents
+//config: listings (-t) and preserving permissions when unpacking (-p).
+//config: +200 bytes.
+//config:
+//config:config FEATURE_TAR_NOPRESERVE_TIME
+//config: bool "Enable -m (do not preserve time) option"
+//config: default y
+//config: depends on TAR
+//config: help
+//config: With this option busybox supports GNU tar -m
+//config: (do not preserve time) option.
+//config:
+//config:config FEATURE_TAR_SELINUX
+//config: bool "Support for extracting SELinux labels"
+//config: default n
+//config: depends on TAR && SELINUX
+//config: help
+//config: With this option busybox supports restoring SELinux labels
+//config: when extracting files from tar archives.
+
+//applet:IF_TAR(APPLET(tar, BB_DIR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_TAR) += tar.o
+
#include <fnmatch.h>
#include "libbb.h"
#include "bb_archive.h"
&& (filesize <= 0x3fffffffffffffffffffffffLL)
#endif
) {
- /* GNU tar uses "base-256 encoding" for very large numbers.
- * Encoding is binary, with highest bit always set as a marker
- * and sign in next-highest bit:
- * 80 00 .. 00 - zero
- * bf ff .. ff - largest positive number
- * ff ff .. ff - minus 1
- * c0 00 .. 00 - smallest negative number
+ /* GNU tar uses "base-256 encoding" for very large numbers.
+ * Encoding is binary, with highest bit always set as a marker
+ * and sign in next-highest bit:
+ * 80 00 .. 00 - zero
+ * bf ff .. ff - largest positive number
+ * ff ff .. ff - minus 1
+ * c0 00 .. 00 - smallest negative number
*/
char *p8 = header.size + sizeof(header.size);
do {
xmove_fd(gzipDataPipe.rd, 0);
xmove_fd(tar_fd, 1);
/* exec gzip/bzip2 program/applet */
- BB_EXECLP(zip_exec, zip_exec, "-f", NULL);
+ BB_EXECLP(zip_exec, zip_exec, "-f", (char *)0);
vfork_exec_errno = errno;
_exit(EXIT_FAILURE);
}
char *cp = last_char_is(line, '/');
if (cp > line)
*cp = '\0';
- llist_add_to(&newlist, line);
+ llist_add_to_end(&newlist, line);
}
fclose(src_stream);
}
return newlist;
}
-#else
-# define append_file_list_to_list(x) 0
#endif
//usage:#define tar_trivial_usage
&& flags == O_RDONLY
&& !(opt & OPT_ANY_COMPRESS)
) {
- tar_handle->src_fd = open_zipped(tar_filename);
+ tar_handle->src_fd = open_zipped(tar_filename, /*fail_if_not_compressed:*/ 0);
if (tar_handle->src_fd < 0)
bb_perror_msg_and_die("can't open '%s'", tar_filename);
} else {
}
if (opt & OPT_ANY_COMPRESS) {
- USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd);)
+ USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate);)
USE_FOR_NOMMU(const char *xformer_prog;)
if (opt & OPT_COMPRESS)
USE_FOR_MMU(xformer = unpack_xz_stream;)
USE_FOR_NOMMU(xformer_prog = "unxz";)
- open_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
+ fork_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
/* Can't lseek over pipes */
tar_handle->seek = seek_by_read;
/*tar_handle->offset = 0; - already is */
}
+ /* Zero processed headers (== empty file) is not a valid tarball.
+ * We (ab)use bb_got_signal as exitcode here,
+ * because check_errors_in_children() uses _it_ as error indicator.
+ */
+ bb_got_signal = EXIT_FAILURE;
+
while (get_header_tar(tar_handle) == EXIT_SUCCESS)
- continue;
+ bb_got_signal = EXIT_SUCCESS; /* saw at least one header, good */
/* Check that every file that should have been extracted was */
while (tar_handle->accept) {
close(tar_handle->src_fd);
if (SEAMLESS_COMPRESSION || OPT_COMPRESS) {
+ /* Set bb_got_signal to 1 if a child died with !0 exitcode */
check_errors_in_children(0);
- return bb_got_signal;
}
- return EXIT_SUCCESS;
+
+ return bb_got_signal;
}
projects / oweals / busybox.git / blobdiff