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/*
* 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 */
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 parent */
transformer(src_fd, fd_pipe[1]);
close(fd_pipe[1]); /* Send EOF */
close(src_fd);
exit(0);
/* notreached */
}
/* parent process */
close(fd_pipe[1]); /* Don't want to write to the child */
return(fd_pipe[0]);
}
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