1 /* vi: set sw=4 ts=4: */
3 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 /* transformer(), more than meets the eye */
11 * On MMU machine, the transform_prog is removed by macro magic
12 * in include/unarchive.h. On NOMMU, transformer is removed.
14 void FAST_FUNC open_transformer(int fd,
15 IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd),
16 const char *transform_prog)
18 struct fd_pair fd_pipe;
26 bb_perror_msg_and_die("vfork" + 1);
30 bb_perror_msg_and_die("vfork");
35 close(fd_pipe.rd); /* we don't want to read from the parent */
36 // FIXME: error check?
38 transformer(fd, fd_pipe.wr);
39 if (ENABLE_FEATURE_CLEAN_UP) {
40 close(fd_pipe.wr); /* send EOF */
43 /* must be _exit! bug was actually seen here */
49 xmove_fd(fd_pipe.wr, 1);
50 argv[0] = (char*)transform_prog;
51 argv[1] = (char*)"-cf";
54 BB_EXECVP(transform_prog, argv);
55 bb_perror_msg_and_die("can't exec %s", transform_prog);
62 close(fd_pipe.wr); /* don't want to write to the child */
63 xmove_fd(fd_pipe.rd, fd);