source: MondoRescue/branches/stable/mindi-busybox/archival/libunarchive/open_transformer.c@ 821

/*
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include <stdlib.h>
#include <unistd.h>

#include "libbb.h"

#include "unarchive.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]);
}