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/* 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"
FILE *
gz_open(FILE *compressed_file, int *pid)
{
int unzip_pipe[2];
if (pipe(unzip_pipe)!=0) {
perror_msg("%s: pipe", __FUNCTION__);
return(NULL);
}
if ((*pid = fork()) == -1) {
perror_msg("%s: fork", __FUNCTION__);
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]);
return(fdopen(unzip_pipe[0], "r"));
}
int
gz_close(int gunzip_pid)
{
int status;
int ret;
if (waitpid(gunzip_pid, &status, 0) == -1) {
perror_msg("%s: waitpid", __FUNCTION__);
return -1;
}
if (WIFSIGNALED(status)) {
error_msg("%s: unzip process killed by signal %d\n",
__FUNCTION__, WTERMSIG(status));
return -1;
}
if (!WIFEXITED(status)) {
/* shouldn't happen */
error_msg("%s: Your system is broken: got status %d from waitpid\n",
__FUNCTION__, status);
return -1;
}
if ((ret = WEXITSTATUS(status))) {
error_msg("%s: unzip process failed with return code %d.\n",
__FUNCTION__, ret);
return -1;
}
return 0;
}
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