Contents of /trunk/mkinitrd-magellan/busybox/archival/libunarchive/open_transformer.c
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Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
File MIME type: text/plain
File size: 1327 byte(s)
-updated to busybox-1.17.1
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
4 | */ |
5 | |
6 | #include "libbb.h" |
7 | #include "unarchive.h" |
8 | |
9 | /* transformer(), more than meets the eye */ |
10 | /* |
11 | * On MMU machine, the transform_prog is removed by macro magic |
12 | * in include/unarchive.h. On NOMMU, transformer is removed. |
13 | */ |
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) |
17 | { |
18 | struct fd_pair fd_pipe; |
19 | int pid; |
20 | |
21 | xpiped_pair(fd_pipe); |
22 | pid = BB_MMU ? xfork() : xvfork(); |
23 | if (pid == 0) { |
24 | /* Child */ |
25 | close(fd_pipe.rd); /* we don't want to read from the parent */ |
26 | // FIXME: error check? |
27 | #if BB_MMU |
28 | transformer(fd, fd_pipe.wr); |
29 | if (ENABLE_FEATURE_CLEAN_UP) { |
30 | close(fd_pipe.wr); /* send EOF */ |
31 | close(fd); |
32 | } |
33 | /* must be _exit! bug was actually seen here */ |
34 | _exit(EXIT_SUCCESS); |
35 | #else |
36 | { |
37 | char *argv[4]; |
38 | xmove_fd(fd, 0); |
39 | xmove_fd(fd_pipe.wr, 1); |
40 | argv[0] = (char*)transform_prog; |
41 | argv[1] = (char*)"-cf"; |
42 | argv[2] = (char*)"-"; |
43 | argv[3] = NULL; |
44 | BB_EXECVP(transform_prog, argv); |
45 | bb_perror_msg_and_die("can't execute '%s'", transform_prog); |
46 | } |
47 | #endif |
48 | /* notreached */ |
49 | } |
50 | |
51 | /* parent process */ |
52 | close(fd_pipe.wr); /* don't want to write to the child */ |
53 | xmove_fd(fd_pipe.rd, fd); |
54 | } |