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authorGlenn L McGrath2002-09-25 02:47:48 +0000
committerGlenn L McGrath2002-09-25 02:47:48 +0000
commit7ca04f328e22fcbee4659d73f9a72dfdf1dd6a23 (patch)
treef38c7ef4317eea28c6abdb0adbbb286fe041711e /archival/rpm2cpio.c
parentecfa290cfd4953598e6d91989bd66ac16e135f84 (diff)
downloadbusybox-7ca04f328e22fcbee4659d73f9a72dfdf1dd6a23.zip
busybox-7ca04f328e22fcbee4659d73f9a72dfdf1dd6a23.tar.gz
New common unarchive code.
Diffstat (limited to 'archival/rpm2cpio.c')
-rw-r--r--archival/rpm2cpio.c57
1 files changed, 34 insertions, 23 deletions
diff --git a/archival/rpm2cpio.c b/archival/rpm2cpio.c
index 22051da..e1e9398 100644
--- a/archival/rpm2cpio.c
+++ b/archival/rpm2cpio.c
@@ -18,10 +18,13 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-#include "busybox.h"
+#include <sys/types.h>
#include <netinet/in.h> /* For ntohl & htonl function */
+#include <fcntl.h>
+#include <unistd.h>
#include <string.h>
+#include "busybox.h"
+#include "unarchive.h"
#define RPM_MAGIC "\355\253\356\333"
#define RPM_HEADER_MAGIC "\216\255\350"
@@ -45,46 +48,54 @@ struct rpm_header {
u_int32_t size; /* Size of store (4 bytes) */
};
-void skip_header(FILE *rpmfile)
+void skip_header(int rpm_fd)
{
struct rpm_header header;
- fread(&header, sizeof(struct rpm_header), 1, rpmfile);
- if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
- if (header.version != 1) error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
+ xread_all(rpm_fd, &header, sizeof(struct rpm_header));
+ if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) {
+ error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
+ }
+ if (header.version != 1) {
+ error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
+ }
header.entries = ntohl(header.entries);
header.size = ntohl(header.size);
- fseek (rpmfile, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
- fseek (rpmfile, header.size, SEEK_CUR); /* Seek past store */
+ lseek (rpm_fd, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
+ lseek (rpm_fd, header.size, SEEK_CUR); /* Seek past store */
}
/* No getopt required */
extern int rpm2cpio_main(int argc, char **argv)
{
struct rpm_lead lead;
- int gunzip_pid;
- FILE *rpmfile, *cpiofile;
+ int rpm_fd;
if (argc == 1) {
- rpmfile = stdin;
+ rpm_fd = fileno(stdin);
} else {
- rpmfile = xfopen(argv[1], "r");
- /* set the buffer size */
- setvbuf(rpmfile, NULL, _IOFBF, 0x8000);
+ rpm_fd = xopen(argv[1], O_RDONLY);
+ }
+
+ xread_all(rpm_fd, &lead, sizeof(struct rpm_lead));
+ if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) {
+ error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
}
- fread (&lead, sizeof(struct rpm_lead), 1, rpmfile);
- if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
/* Skip the signature header */
- skip_header(rpmfile);
- fseek(rpmfile, (8 - (ftell(rpmfile) % 8)) % 8, SEEK_CUR); /* Pad to 8 byte boundary */
+ skip_header(rpm_fd);
+ data_align(rpm_fd, lseek(rpm_fd, 0, SEEK_CUR), 8);
+
/* Skip the main header */
- skip_header(rpmfile);
+ skip_header(rpm_fd);
+
+ check_header_gzip(rpm_fd);
+ if (inflate(rpm_fd, fileno(stdout)) != 0) {
+ error_msg("Error inflating");
+ }
+ check_trailer_gzip(rpm_fd);
- cpiofile = gz_open(rpmfile, &gunzip_pid);
+ close(rpm_fd);
- copyfd(fileno(cpiofile), fileno(stdout));
- gz_close(gunzip_pid);
- fclose(rpmfile);
return 0;
}