From a0d395eac9c7f8c6db288df5b345146a7da4977b Mon Sep 17 00:00:00 2001
From: Glenn L McGrath <bug1@ihug.co.nz>
Date: Tue, 19 Nov 2002 08:22:03 +0000
Subject: [PATCH] Use read_gz, remove fork() woohoo!

---
 archival/libunarchive/get_header_tar_gz.c | 53 ++++-------------------
 1 file changed, 9 insertions(+), 44 deletions(-)

diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
index f77b775d3..a4355d24c 100644
--- a/archival/libunarchive/get_header_tar_gz.c
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -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);
 }