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authorGravatar Glenn L McGrath <bug1@ihug.co.nz>2003-11-15 23:19:05 +0000
committerGravatar Glenn L McGrath <bug1@ihug.co.nz>2003-11-15 23:19:05 +0000
commit5699b8525e855a0e851725980964e8755e365f5b (patch)
treefe3d7ead1f80f5b56e44e52a651f368adf92c91d /archival/libunarchive/open_transformer.c
parent54ac057c0016ac23b7367342f4834e33cf7d47d7 (diff)
downloadbusybox-5699b8525e855a0e851725980964e8755e365f5b.tar.gz
busybox-5699b8525e855a0e851725980964e8755e365f5b.tar.bz2
Move from read_gz to the pipe()+fork() method.
open_transformer(), common code for pipe+fork. Function pointer for read() no longer needed. Allow inflate to be initialised with a specified buffer size to avoid over-reading. Reset static variables in inflate_get_next_window to fix a bug where only the first file in a .zip would be be extracted.
Diffstat (limited to 'archival/libunarchive/open_transformer.c')
-rw-r--r--archival/libunarchive/open_transformer.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/archival/libunarchive/open_transformer.c b/archival/libunarchive/open_transformer.c
new file mode 100644
index 000000000..c1007f982
--- /dev/null
+++ b/archival/libunarchive/open_transformer.c
@@ -0,0 +1,50 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "libbb.h"
+
+/* transformer(), more than meets the eye */
+extern int open_transformer(int src_fd, int (*transformer)(int src_fd, int dst_fd))
+{
+ int fd_pipe[2];
+ int pid;
+
+ if (pipe(fd_pipe) != 0) {
+ bb_perror_msg_and_die("Can't create pipe");
+ }
+
+ pid = fork();
+ if (pid == -1) {
+ bb_perror_msg_and_die("Fork failed");
+ }
+
+ if (pid == 0) {
+ /* child process */
+ close(fd_pipe[0]); /* We don't wan't to read from the pipe */
+ transformer(src_fd, fd_pipe[1]);
+ close(fd_pipe[1]); /* Send EOF */
+ exit(0);
+ /* notreached */
+ }
+ /* parent process */
+ close(fd_pipe[1]); /* Don't want to write down the pipe */
+ close(src_fd);
+
+ return(fd_pipe[0]);
+}