diff options
Diffstat (limited to 'src/libbb/gz_open.c')
-rw-r--r-- | src/libbb/gz_open.c | 149 |
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; -} |