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-rw-r--r--archival/libarchive/open_transformer.c38
-rw-r--r--archival/rpm.c17
2 files changed, 40 insertions, 15 deletions
diff --git a/archival/libarchive/open_transformer.c b/archival/libarchive/open_transformer.c
index ac7e5db..290dd13 100644
--- a/archival/libarchive/open_transformer.c
+++ b/archival/libarchive/open_transformer.c
@@ -225,18 +225,8 @@ static transformer_state_t *setup_transformer_on_fd(int fd, int fail_if_not_comp
return xstate;
}
-/* Used by e.g. rpm which gives us a fd without filename,
- * thus we can't guess the format from filename's extension.
- */
-int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
+static void fork_transformer_and_free(transformer_state_t *xstate)
{
- transformer_state_t *xstate = setup_transformer_on_fd(fd, fail_if_not_compressed);
-
- if (!xstate || !xstate->xformer) {
- free(xstate);
- return 1;
- }
-
# if BB_MMU
fork_transformer_with_no_sig(xstate->src_fd, xstate->xformer);
# else
@@ -249,8 +239,34 @@ int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
fork_transformer_with_sig(xstate->src_fd, xstate->xformer, xstate->xformer_prog);
# endif
free(xstate);
+}
+
+/* Used by e.g. rpm which gives us a fd without filename,
+ * thus we can't guess the format from filename's extension.
+ */
+int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
+{
+ transformer_state_t *xstate = setup_transformer_on_fd(fd, fail_if_not_compressed);
+
+ if (!xstate->xformer) {
+ free(xstate);
+ return 1;
+ }
+
+ fork_transformer_and_free(xstate);
return 0;
}
+#if ENABLE_FEATURE_SEAMLESS_LZMA
+/* ...and custom version for LZMA */
+void FAST_FUNC setup_lzma_on_fd(int fd)
+{
+ transformer_state_t *xstate = xzalloc(sizeof(*xstate));
+ xstate->src_fd = fd;
+ xstate->xformer = unpack_lzma_stream;
+ USE_FOR_NOMMU(xstate->xformer_prog = "unlzma";)
+ fork_transformer_and_free(xstate);
+}
+#endif
static transformer_state_t *open_transformer(const char *fname, int fail_if_not_compressed)
{
diff --git a/archival/rpm.c b/archival/rpm.c
index f46d88b..cca17da 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -56,6 +56,8 @@
#define TAG_DIRINDEXES 1116
#define TAG_BASENAMES 1117
#define TAG_DIRNAMES 1118
+#define TAG_PAYLOADCOMPRESSOR 1125
+
#define RPMFILE_CONFIG (1 << 0)
#define RPMFILE_DOC (1 << 1)
@@ -510,6 +512,7 @@ int rpm_main(int argc, char **argv)
int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
{
+ const char *str;
int rpm_fd;
G.pagesize = getpagesize();
@@ -520,11 +523,17 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
// /* We need to know whether child (gzip/bzip/etc) exits abnormally */
// signal(SIGCHLD, check_errors_in_children);
-//TODO: look for rpm tag RPMTAG_PAYLOADCOMPRESSOR (dec 1125, hex 0x465),
-// if the value is "lzma", set up decompressor without detection
-// (lzma can't be detected).
+ if (ENABLE_FEATURE_SEAMLESS_LZMA
+ && (str = rpm_getstr0(TAG_PAYLOADCOMPRESSOR)) != NULL
+ && strcmp(str, "lzma") == 0
+ ) {
+ // lzma compression can't be detected
+ // set up decompressor without detection
+ setup_lzma_on_fd(rpm_fd);
+ } else {
+ setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
+ }
- setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
bb_error_msg_and_die("error unpacking");