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-rw-r--r--archival/libunarchive/Kbuild60
-rw-r--r--archival/libunarchive/get_header_tar_bz2.c2
-rw-r--r--archival/libunarchive/get_header_tar_gz.c9
-rw-r--r--archival/libunarchive/get_header_tar_lzma.c2
-rw-r--r--archival/libunarchive/open_transformer.c25
5 files changed, 61 insertions, 37 deletions
diff --git a/archival/libunarchive/Kbuild b/archival/libunarchive/Kbuild
index 3c29d541a..d104524e4 100644
--- a/archival/libunarchive/Kbuild
+++ b/archival/libunarchive/Kbuild
@@ -35,36 +35,34 @@ DPKG_FILES:= \
get_header_tar.o \
filter_accept_list_reassign.o
-# open_transformer uses fork(). Compile it only if absolutely necessary
lib-$(CONFIG_RPM) += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_BZIP2) += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_LZMA) += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_GZIP) += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_COMPRESS) += open_transformer.o
-lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += open_transformer.o
-lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += open_transformer.o
-lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += open_transformer.o
-
-lib-$(CONFIG_AR) += get_header_ar.o unpack_ar_archive.o
-lib-$(CONFIG_BUNZIP2) += decompress_bunzip2.o
-lib-$(CONFIG_UNLZMA) += decompress_unlzma.o
-lib-$(CONFIG_CPIO) += get_header_cpio.o
-lib-$(CONFIG_DPKG) += $(DPKG_FILES)
-lib-$(CONFIG_DPKG_DEB) += $(DPKG_FILES)
-lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += $(GUNZIP_FILES) get_header_tar_gz.o
-lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += decompress_bunzip2.o get_header_tar_bz2.o
-lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o
-lib-$(CONFIG_GUNZIP) += $(GUNZIP_FILES)
-lib-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS) += decompress_uncompress.o
-lib-$(CONFIG_RPM2CPIO) += $(GUNZIP_FILES) get_header_cpio.o
-lib-$(CONFIG_RPM) += $(GUNZIP_FILES) get_header_cpio.o
-lib-$(CONFIG_FEATURE_RPM_BZ2) += decompress_bunzip2.o
-lib-$(CONFIG_TAR) += get_header_tar.o
-lib-$(CONFIG_FEATURE_TAR_BZIP2) += decompress_bunzip2.o get_header_tar_bz2.o
-lib-$(CONFIG_FEATURE_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o
-lib-$(CONFIG_FEATURE_TAR_GZIP) += $(GUNZIP_FILES) get_header_tar_gz.o
-lib-$(CONFIG_FEATURE_TAR_COMPRESS) += decompress_uncompress.o
-lib-$(CONFIG_UNCOMPRESS) += decompress_uncompress.o
-lib-$(CONFIG_UNZIP) += $(GUNZIP_FILES)
-lib-$(CONFIG_FEATURE_COMPRESS_USAGE) += decompress_bunzip2.o
+lib-$(CONFIG_FEATURE_TAR_BZIP2) += open_transformer.o
+lib-$(CONFIG_FEATURE_TAR_LZMA) += open_transformer.o
+lib-$(CONFIG_FEATURE_TAR_GZIP) += open_transformer.o
+lib-$(CONFIG_FEATURE_TAR_COMPRESS) += open_transformer.o
+lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += open_transformer.o
+lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += open_transformer.o
+lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += open_transformer.o
+lib-$(CONFIG_AR) += get_header_ar.o unpack_ar_archive.o
+lib-$(CONFIG_BUNZIP2) += decompress_bunzip2.o
+lib-$(CONFIG_UNLZMA) += decompress_unlzma.o
+lib-$(CONFIG_CPIO) += get_header_cpio.o
+lib-$(CONFIG_DPKG) += $(DPKG_FILES)
+lib-$(CONFIG_DPKG_DEB) += $(DPKG_FILES)
+lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += $(GUNZIP_FILES) get_header_tar_gz.o
+lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += decompress_bunzip2.o get_header_tar_bz2.o
+lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o
+lib-$(CONFIG_GUNZIP) += $(GUNZIP_FILES)
+lib-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS) += decompress_uncompress.o
+lib-$(CONFIG_RPM2CPIO) += $(GUNZIP_FILES) get_header_cpio.o
+lib-$(CONFIG_RPM) += $(GUNZIP_FILES) get_header_cpio.o
+lib-$(CONFIG_FEATURE_RPM_BZ2) += decompress_bunzip2.o
+lib-$(CONFIG_TAR) += get_header_tar.o
+lib-$(CONFIG_FEATURE_TAR_BZIP2) += decompress_bunzip2.o get_header_tar_bz2.o
+lib-$(CONFIG_FEATURE_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o
+lib-$(CONFIG_FEATURE_TAR_GZIP) += $(GUNZIP_FILES) get_header_tar_gz.o
+lib-$(CONFIG_FEATURE_TAR_COMPRESS) += decompress_uncompress.o
+lib-$(CONFIG_UNCOMPRESS) += decompress_uncompress.o
+lib-$(CONFIG_UNZIP) += $(GUNZIP_FILES)
+lib-$(CONFIG_FEATURE_COMPRESS_USAGE) += decompress_bunzip2.o
diff --git a/archival/libunarchive/get_header_tar_bz2.c b/archival/libunarchive/get_header_tar_bz2.c
index e11f44cad..8f7f83fc2 100644
--- a/archival/libunarchive/get_header_tar_bz2.c
+++ b/archival/libunarchive/get_header_tar_bz2.c
@@ -11,7 +11,7 @@ char get_header_tar_bz2(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_bz2_stream);
+ archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_bz2_stream, "bunzip2", "bunzip2", "-cf", "-", NULL);
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
index 85070d978..a99061411 100644
--- a/archival/libunarchive/get_header_tar_gz.c
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -8,19 +8,26 @@
char get_header_tar_gz(archive_handle_t *archive_handle)
{
+#if BB_MMU
unsigned char magic[2];
+#endif
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
+ /* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
+ * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
+ * need the header. */
+#if BB_MMU
xread(archive_handle->src_fd, &magic, 2);
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
bb_error_msg_and_die("invalid gzip magic");
}
check_header_gzip_or_die(archive_handle->src_fd);
+#endif
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream);
+ archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip", "gunzip", "-cf", "-", NULL);
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
diff --git a/archival/libunarchive/get_header_tar_lzma.c b/archival/libunarchive/get_header_tar_lzma.c
index 771f664f2..f0e45f2c5 100644
--- a/archival/libunarchive/get_header_tar_lzma.c
+++ b/archival/libunarchive/get_header_tar_lzma.c
@@ -14,7 +14,7 @@ char get_header_tar_lzma(archive_handle_t * archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream);
+ archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream, "unlzma", "unlzma", "-cf", "-", NULL);
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
diff --git a/archival/libunarchive/open_transformer.c b/archival/libunarchive/open_transformer.c
index 93f01be6f..f8f587e8d 100644
--- a/archival/libunarchive/open_transformer.c
+++ b/archival/libunarchive/open_transformer.c
@@ -7,29 +7,48 @@
#include "unarchive.h"
/* transformer(), more than meets the eye */
+/*
+ * On MMU machine, the transform_prog and ... are stripped
+ * by a macro in include/unarchive.h. On NOMMU, transformer is stripped.
+ */
int open_transformer(int src_fd,
- USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd))
+ USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd),
+ const char *transform_prog, ...)
{
int fd_pipe[2];
int pid;
xpipe(fd_pipe);
+#if BB_MMU
pid = fork();
- if (pid == -1) {
+#else
+ pid = vfork();
+#endif
+ if (pid == -1)
bb_perror_msg_and_die("fork failed");
- }
if (pid == 0) {
+#if !BB_MMU
+ va_list ap;
+#endif
/* child process */
close(fd_pipe[0]); /* We don't wan't to read from the parent */
// FIXME: error check?
+#if BB_MMU
transformer(src_fd, fd_pipe[1]);
if (ENABLE_FEATURE_CLEAN_UP) {
close(fd_pipe[1]); /* Send EOF */
close(src_fd);
}
exit(0);
+#else
+ xmove_fd(src_fd, 0);
+ xmove_fd(fd_pipe[1], 1);
+ va_start(ap, transform_prog);
+ BB_EXECVP(transform_prog, ap);
+ bb_perror_and_die("exec failed");
+#endif
/* notreached */
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 23:02:52 +0000