| /* 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, 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]); |
| } |