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authorDenys Vlasenko2010-05-06 14:19:19 +0000
committerDenys Vlasenko2010-05-06 14:19:19 +0000
commit27653adc8b7ebe44bd357511de53d0c14eef0894 (patch)
treed1c9b0facbcca408a18d75f93aa507e96927ef31 /archival/rpm2cpio.c
parentb8ba6b66f5d730efcf13dbbb3f9362dd6840d93b (diff)
downloadbusybox-27653adc8b7ebe44bd357511de53d0c14eef0894.zip
busybox-27653adc8b7ebe44bd357511de53d0c14eef0894.tar.gz
rpm: code shrink. Now uses open_zipped's logic (factored out into setup_unzip_on_fd())
function old new delta setup_unzip_on_fd - 80 +80 open_zipped 176 113 -63 rpm_main 1672 1355 -317 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/2 up/down: 80/-380) Total: -300 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'archival/rpm2cpio.c')
-rw-r--r--archival/rpm2cpio.c69
1 files changed, 28 insertions, 41 deletions
diff --git a/archival/rpm2cpio.c b/archival/rpm2cpio.c
index 5403aee..4ed5b02 100644
--- a/archival/rpm2cpio.c
+++ b/archival/rpm2cpio.c
@@ -8,30 +8,7 @@
*/
#include "libbb.h"
#include "unarchive.h"
-
-#define RPM_MAGIC 0xedabeedb
-#define RPM_MAGIC_STR "\355\253\356\333"
-
-struct rpm_lead {
- uint32_t magic;
- uint8_t major, minor;
- uint16_t type;
- uint16_t archnum;
- char name[66];
- uint16_t osnum;
- uint16_t signature_type;
- char reserved[16];
-};
-
-#define RPM_HEADER_MAGICnVER 0x8eade801
-#define RPM_HEADER_MAGIC_STR "\216\255\350"
-
-struct rpm_header {
- uint32_t magic_and_ver; /* 3 byte magic: 0x8e 0xad 0xe8; 1 byte version */
- uint32_t reserved; /* 4 bytes reserved */
- uint32_t entries; /* Number of entries in header (4 bytes) */
- uint32_t size; /* Size of store (4 bytes) */
-};
+#include "rpm.h"
enum { rpm_fd = STDIN_FILENO };
@@ -65,8 +42,6 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
{
struct rpm_lead lead;
unsigned pos;
- unsigned char magic[2];
- IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
if (argv[1]) {
xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
@@ -74,33 +49,45 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
xread(rpm_fd, &lead, sizeof(lead));
/* Just check the magic, the rest is irrelevant */
- if (lead.magic != htonl(RPM_MAGIC)) {
+ if (lead.magic != htonl(RPM_LEAD_MAGIC)) {
bb_error_msg_and_die("invalid RPM magic");
}
/* Skip the signature header, align to 8 bytes */
pos = skip_header();
- seek_by_jump(rpm_fd, (8 - pos) & 7);
+ seek_by_jump(rpm_fd, (-(int)pos) & 7);
/* Skip the main header */
skip_header();
- 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 0
+ /* This works, but doesn't report uncompress errors (they happen in child) */
+ setup_unzip_on_fd(rpm_fd /*fail_if_not_detected: 1*/);
+ if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
+ bb_error_msg_and_die("error unpacking");
+#else
+ /* BLOAT */
+ {
+ unsigned char magic[2];
+ 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");
+ }
+ unpack = unpack_bz2_stream;
}
- unpack = unpack_bz2_stream;
- }
- if (unpack(rpm_fd, STDOUT_FILENO) < 0) {
- bb_error_msg_and_die("error unpacking");
+ if (unpack(rpm_fd, STDOUT_FILENO) < 0)
+ bb_error_msg_and_die("error unpacking");
}
+#endif
if (ENABLE_FEATURE_CLEAN_UP) {
close(rpm_fd);