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Use read_gz, remove fork() woohoo!

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Glenn L McGrath 2002-11-19 08:22:03 +00:00
parent ae01fa99e1
commit a0d395eac9
1 changed files with 9 additions and 44 deletions
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53
archival/libunarchive/get_header_tar_gz.c
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@ -14,25 +14,15 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libbb.h"
#include "unarchive.h"
extern char get_header_tar_gz(archive_handle_t *archive_handle)
{
int fd_pipe[2];
int pid;
unsigned char magic[2];
/* Cant lseek over pipe's */
archive_handle->read = read;
archive_handle->seek = seek_by_char;
archive_xread_all(archive_handle, &magic, 2);
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
error_msg_and_die("Invalid gzip magic");
@ -40,45 +30,20 @@ extern char get_header_tar_gz(archive_handle_t *archive_handle)
check_header_gzip(archive_handle->src_fd);
if (pipe(fd_pipe) != 0) {
error_msg_and_die("Can't create pipe");
}
GZ_gzReadOpen(archive_handle->src_fd, 0, 0);
pid = fork();
if (pid == -1) {
error_msg_and_die("Fork failed\n");
}
if (pid == 0) {
/* child process */
close(fd_pipe[0]); /* We don't wan't to read from the pipe */
inflate(archive_handle->src_fd, fd_pipe[1]);
check_trailer_gzip(archive_handle->src_fd);
close(fd_pipe[1]); /* Send EOF */
exit(0);
/* notreached */
}
/* parent process */
close(fd_pipe[1]); /* Don't want to write down the pipe */
close(archive_handle->src_fd);
archive_handle->src_fd = fd_pipe[0];
archive_handle->read = read_gz;
archive_handle->seek = seek_by_char;
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS);
if (kill(pid, SIGTERM) == -1) {
error_msg_and_die("Couldnt kill gunzip process");
}
/* I dont think this is needed */
#if 0
if (waitpid(pid, NULL, 0) == -1) {
error_msg("Couldnt wait ?");
}
#endif
/* Cleanup */
GZ_gzReadClose();
/* Can only do one file at a time */
check_trailer_gzip(archive_handle->src_fd);
/* Can only do one tar.bz2 per archive */
return(EXIT_FAILURE);
}