hush/archival/libunarchive/open_transformer.c
Denis Vlasenko 5a6aeddfa7 xpipe: introduce (saves ~170 bytes)
udhcp/signalpipe.c: use pipe instead of socketpair.
2007-05-26 16:44:20 +00:00

43 lines
825 B
C

/* vi: set sw=4 ts=4: */
/*
* 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,
USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd))
{
int fd_pipe[2];
int pid;
xpipe(fd_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 */
// FIXME: error check?
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];
}