summaryrefslogtreecommitdiffstats
path: root/src/libbb/gz_open.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libbb/gz_open.c')
-rw-r--r--src/libbb/gz_open.c149
1 files changed, 0 insertions, 149 deletions
diff --git a/src/libbb/gz_open.c b/src/libbb/gz_open.c
deleted file mode 100644
index bdc7564..0000000
--- a/src/libbb/gz_open.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/* 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"
-
-static int gz_use_vfork;
-
-FILE *
-gz_open(FILE *compressed_file, int *pid)
-{
- int unzip_pipe[2];
- off_t floc;
- int cfile = -1;
-
- gz_use_vfork = (getenv("OPKG_USE_VFORK") != NULL);
-
- if (gz_use_vfork) {
- /* Create a new file descriptor for the input stream
- * (it *must* be associated with a file), and lseek()
- * to the same position in that fd as the stream.
- */
- cfile = dup(fileno(compressed_file));
- floc = ftello(compressed_file);
- lseek(cfile, floc, SEEK_SET);
- setenv("GZIP", "--quiet", 0);
- }
-
- if (pipe(unzip_pipe)!=0) {
- perror_msg("pipe");
- return(NULL);
- }
-
- /* If we don't flush, we end up with two copies of anything pending,
- one from the parent, one from the child */
- fflush(stdout);
- fflush(stderr);
-
- if (gz_use_vfork) {
- *pid = vfork();
- } else {
- *pid = fork();
- }
-
- if (*pid<0) {
- perror_msg("fork");
- return(NULL);
- }
-
- if (*pid==0) {
- /* child process */
- close(unzip_pipe[0]);
- if (gz_use_vfork) {
- dup2(unzip_pipe[1], 1);
- dup2(cfile, 0);
- execlp("gunzip","gunzip",NULL);
- /* If we get here, we had a failure */
- _exit(EXIT_FAILURE);
- } else {
- unzip(compressed_file, fdopen(unzip_pipe[1], "w"));
- fflush(NULL);
- fclose(compressed_file);
- close(unzip_pipe[1]);
- _exit(EXIT_SUCCESS);
- }
- }
- /* Parent process is executing here */
- if (gz_use_vfork) {
- close(cfile);
- }
- close(unzip_pipe[1]);
- return(fdopen(unzip_pipe[0], "r"));
-}
-
-int
-gz_close(int gunzip_pid)
-{
- int status;
- int ret;
-
- if (gz_use_vfork) {
- /* The gunzip process remains running in the background if we
- * used the vfork()/exec() technique - so we have to kill it
- * forcibly. There might be a better way to do this, but that
- * affect a lot of other parts of opkg, and this works fine.
- */
- if (kill(gunzip_pid, SIGTERM) == -1) {
- perror_msg("gz_close(): unable to kill gunzip pid.");
- return -1;
- }
- }
-
-
- if (waitpid(gunzip_pid, &status, 0) == -1) {
- perror_msg("waitpid");
- return -1;
- }
-
- if (gz_use_vfork) {
- /* Bail out here if we used the vfork()/exec() technique. */
- return 0;
- }
-
- if (WIFSIGNALED(status)) {
- error_msg("Unzip process killed by signal %d.\n",
- WTERMSIG(status));
- return -1;
- }
-
- if (!WIFEXITED(status)) {
- /* shouldn't happen */
- error_msg("Your system is broken: got status %d from waitpid.\n",
- status);
- return -1;
- }
-
- if ((ret = WEXITSTATUS(status))) {
- error_msg("Unzip process failed with return code %d.\n",
- ret);
- return -1;
- }
-
- return 0;
-}