diff options
| -rw-r--r-- | archival/rpm2cpio.c | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/archival/rpm2cpio.c b/archival/rpm2cpio.c index 4ed5b023b..598ec8670 100644 --- a/archival/rpm2cpio.c +++ b/archival/rpm2cpio.c @@ -68,22 +68,35 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv) #else /* BLOAT */ { - unsigned char magic[2]; + unsigned char magic[8]; IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd); xread(rpm_fd, &magic, 2); - unpack = unpack_gz_stream; - if (magic[0] != 0x1f || magic[1] != 0x8b) { - if (!ENABLE_FEATURE_SEAMLESS_BZ2 - || magic[0] != 'B' || magic[1] != 'Z' - ) { - bb_error_msg_and_die("invalid gzip" - IF_FEATURE_SEAMLESS_BZ2("/bzip2") - " magic"); - } + if (magic[0] == 0x1f && magic[1] == 0x8b) { + unpack = unpack_gz_stream; + } else + if (ENABLE_FEATURE_SEAMLESS_BZ2 + && magic[0] == 'B' && magic[1] == 'Z' + ) { unpack = unpack_bz2_stream; + } else + if (ENABLE_FEATURE_SEAMLESS_XZ + && magic[0] == 0xfd && magic[1] == '7' + ) { + /* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */ + /* More info at: http://tukaani.org/xz/xz-file-format.txt */ + xread(rpm_fd, magic + 2, 4); + if (strcmp((char*)magic + 2, "zXZ") != 0) + goto no_magic; + xlseek(rpm_fd, -6, SEEK_CUR); + unpack = unpack_xz_stream; + } else { + no_magic: + bb_error_msg_and_die("no gzip" + IF_FEATURE_SEAMLESS_BZ2("/bzip2") + IF_FEATURE_SEAMLESS_XZ("/xz") + " magic"); } - if (unpack(rpm_fd, STDOUT_FILENO) < 0) bb_error_msg_and_die("error unpacking"); } |