rpm2cpio: handle LZMA compressed rpms. closes 10166

function                                             old     new   delta
rpm2cpio_main                                         78     120     +42
setup_lzma_on_fd                                       -      29     +29
fork_transformer_and_free                              -      28     +28
...
setup_unzip_on_fd                                     56      32     -24
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/5 up/down: 104/-67)            Total: 37 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/libbb.h b/include/libbb.h
index 2eb1fef33..86ad0a057 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -863,7 +863,7 @@ unsigned bb_clk_tck(void) FAST_FUNC;
 
 #if SEAMLESS_COMPRESSION
 /* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
-extern int setup_unzip_on_fd(int fd, int fail_if_not_compressed) FAST_FUNC;
+int setup_unzip_on_fd(int fd, int fail_if_not_compressed) FAST_FUNC;
 /* Autodetects .gz etc */
 extern int open_zipped(const char *fname, int fail_if_not_compressed) FAST_FUNC;
 extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
@@ -872,6 +872,8 @@ extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p)
 # define open_zipped(fname, fail_if_not_compressed)  open((fname), O_RDONLY);
 # define xmalloc_open_zipped_read_close(fname, maxsz_p) xmalloc_open_read_close((fname), (maxsz_p))
 #endif
+/* lzma has no signature, need a little helper. NB: exist only for ENABLE_FEATURE_SEAMLESS_LZMA=y */
+void setup_lzma_on_fd(int fd) FAST_FUNC;
 
 extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
 // NB: will return short write on error, not -1,