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New common unarchive code.

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This commit is contained in:
Glenn L McGrath
2002-09-25 02:47:48 +00:00
parent ecfa290cfd
commit 7ca04f328e
36 changed files with 2436 additions and 1914 deletions
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57
archival/rpm2cpio.c
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@ -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);
cpiofile = gz_open(rpmfile, &gunzip_pid);
check_header_gzip(rpm_fd);
if (inflate(rpm_fd, fileno(stdout)) != 0) {
error_msg("Error inflating");
}
check_trailer_gzip(rpm_fd);
close(rpm_fd);
copyfd(fileno(cpiofile), fileno(stdout));
gz_close(gunzip_pid);
fclose(rpmfile);
return 0;
}