* Add ipkg for future development

[project/opkg-lede.git] / libbb / gz_open.c

diff --git a/libbb/gz_open.c b/libbb/gz_open.c
new file mode 100644 (file)
index 0000000..dbaf3bb
--- /dev/null
+++ b/libbb/gz_open.c
@@ -0,0 +1,58 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) many different people.  If you wrote this, please
+ * acknowledge your work.
+ *
+ * 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
+ * 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 <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "libbb.h"
+
+extern FILE *gz_open(FILE *compressed_file, int *pid)
+{
+       int unzip_pipe[2];
+
+       if (pipe(unzip_pipe)!=0) {
+               error_msg("pipe error");
+               return(NULL);
+       }
+       if ((*pid = fork()) == -1) {
+               error_msg("fork failed");
+               return(NULL);
+       }
+       if (*pid==0) {
+               /* child process */
+               close(unzip_pipe[0]);
+               unzip(compressed_file, fdopen(unzip_pipe[1], "w"));
+               fflush(NULL);
+               fclose(compressed_file);
+               close(unzip_pipe[1]);
+               exit(EXIT_SUCCESS);
+       }
+       close(unzip_pipe[1]);
+       if (unzip_pipe[0] == -1) {
+               error_msg("gzip stream init failed");
+       }
+       return(fdopen(unzip_pipe[0], "r"));
+}