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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2011-02-06 20:01:11 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2011-02-06 20:01:11 +0100 |
| commit | aef441cb4d567da5575c498141b21eb38dc3fdaf (patch) | |
| tree | f99a2ebecd77c614f243c4df859ee40f7281f9bc | |
| parent | ca18e25525267736e7e919987c50569f27d70d36 (diff) | |
| download | busybox-aef441cb4d567da5575c498141b21eb38dc3fdaf.tar.gz | |
tar: fix a bug where autodetection messes up -z on extract
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | archival/libarchive/get_header_tar_gz.c | 4 | ||||
| -rw-r--r-- | archival/tar.c | 6 | ||||
| -rw-r--r-- | include/archive.h | 20 | ||||
| -rwxr-xr-x | testsuite/tar.tests | 14 |
4 files changed, 30 insertions, 14 deletions
diff --git a/archival/libarchive/get_header_tar_gz.c b/archival/libarchive/get_header_tar_gz.c index b09f8691c..889fed0d9 100644 --- a/archival/libarchive/get_header_tar_gz.c +++ b/archival/libarchive/get_header_tar_gz.c @@ -9,7 +9,7 @@ char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle) { #if BB_MMU - unsigned char magic[2]; + uint16_t magic; #endif /* Can't lseek over pipes */ @@ -21,7 +21,7 @@ char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle) #if BB_MMU xread(archive_handle->src_fd, &magic, 2); /* Can skip this check, but error message will be less clear */ - if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) { + if (magic != GZIP_MAGIC) { bb_error_msg_and_die("invalid gzip magic"); } #endif diff --git a/archival/tar.c b/archival/tar.c index e9dc41fe1..1e3cecf44 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -1060,8 +1060,10 @@ int tar_main(int argc UNUSED_PARAM, char **argv) tar_handle->src_fd = tar_fd; tar_handle->seek = seek_by_read; } else { - if (ENABLE_FEATURE_TAR_AUTODETECT && flags == O_RDONLY) { - get_header_ptr = get_header_tar; + if (ENABLE_FEATURE_TAR_AUTODETECT + && flags == O_RDONLY + && get_header_ptr == get_header_tar + ) { tar_handle->src_fd = open_zipped(tar_filename); if (tar_handle->src_fd < 0) bb_perror_msg_and_die("can't open '%s'", tar_filename); diff --git a/include/archive.h b/include/archive.h index ba6d323e0..49c478728 100644 --- a/include/archive.h +++ b/include/archive.h @@ -8,22 +8,22 @@ enum { #if BB_BIG_ENDIAN COMPRESS_MAGIC = 0x1f9d, GZIP_MAGIC = 0x1f8b, - BZIP2_MAGIC = 'B' * 256 + 'Z', + BZIP2_MAGIC = 256 * 'B' + 'Z', /* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */ /* More info at: http://tukaani.org/xz/xz-file-format.txt */ - XZ_MAGIC1 = 0xfd * 256 + '7', - XZ_MAGIC2 = (('z' * 256 + 'X') * 256 + 'Z') * 256 + 0, + XZ_MAGIC1 = 256 * 0xfd + '7', + XZ_MAGIC2 = 256 * (256 * (256 * 'z' + 'X') + 'Z') + 0, /* Different form: 32 bits, then 16 bits: */ - XZ_MAGIC1a = ((0xfd * 256 + '7') * 256 + 'z') * 256 + 'X', - XZ_MAGIC2a = 'Z' * 256 + 0, + XZ_MAGIC1a = 256 * (256 * (256 * 0xfd + '7') + 'z') + 'X', + XZ_MAGIC2a = 256 * 'Z' + 0, #else COMPRESS_MAGIC = 0x9d1f, GZIP_MAGIC = 0x8b1f, - BZIP2_MAGIC = 'Z' * 256 + 'B', - XZ_MAGIC1 = '7' * 256 + 0xfd, - XZ_MAGIC2 = ((0 * 256 + 'Z') * 256 + 'X') * 256 + 'z', - XZ_MAGIC1a = (('X' * 256 + 'z') * 256 + '7') * 256 + 0xfd, - XZ_MAGIC2a = 0 * 256 + 'Z', + BZIP2_MAGIC = 'B' + 'Z' * 256, + XZ_MAGIC1 = 0xfd + '7' * 256, + XZ_MAGIC2 = 'z' + ('X' + ('Z' + 0 * 256) * 256) * 256, + XZ_MAGIC1a = 0xfd + ('7' + ('z' + 'X' * 256) * 256) * 256, + XZ_MAGIC2a = 'Z' + 0 * 256, #endif }; diff --git a/testsuite/tar.tests b/testsuite/tar.tests index f2f4e9348..824d6d54e 100755 --- a/testsuite/tar.tests +++ b/testsuite/tar.tests @@ -154,6 +154,20 @@ dr-xr-x--- input_dir SKIP= } +# Had a bug where on extrace autodetect first "switched off" -z +# and then failed to recognize .tgz extension +testing "tar extract tgz" "\ +dd count=1 bs=1M if=/dev/zero of=F0 2>/dev/null +tar -czf F0.tgz F0 +rm F0 +tar -xzvf F0.tgz && echo Ok +rm F0 || echo BAD +" "\ +F0 +Ok +" \ +"" "" + cd .. && rm -rf tar.tempdir || exit 1 |