blob: 652a41c33f9d6426ff893a60de41dacf82c4b908
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini fsync implementation for busybox |
4 | * |
5 | * Copyright (C) 2008 Nokia Corporation. All rights reserved. |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | */ |
9 | |
10 | //usage:#define fsync_trivial_usage |
11 | //usage: "[-d] FILE..." |
12 | //usage:#define fsync_full_usage "\n\n" |
13 | //usage: "Write files' buffered blocks to disk\n" |
14 | //usage: "\n -d Avoid syncing metadata" |
15 | |
16 | #include "libbb.h" |
17 | #ifndef O_NOATIME |
18 | # define O_NOATIME 0 |
19 | #endif |
20 | |
21 | /* This is a NOFORK applet. Be very careful! */ |
22 | |
23 | int fsync_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
24 | int fsync_main(int argc UNUSED_PARAM, char **argv) |
25 | { |
26 | int status; |
27 | int opts; |
28 | |
29 | opts = getopt32(argv, "d"); /* fdatasync */ |
30 | argv += optind; |
31 | if (!*argv) { |
32 | bb_show_usage(); |
33 | } |
34 | |
35 | status = EXIT_SUCCESS; |
36 | do { |
37 | int fd = open_or_warn(*argv, O_NOATIME | O_NOCTTY | O_RDONLY); |
38 | |
39 | if (fd == -1) { |
40 | status = EXIT_FAILURE; |
41 | continue; |
42 | } |
43 | if ((opts ? fdatasync(fd) : fsync(fd))) { |
44 | //status = EXIT_FAILURE; - do we want this? |
45 | bb_simple_perror_msg(*argv); |
46 | } |
47 | close(fd); |
48 | } while (*++argv); |
49 | |
50 | return status; |
51 | } |
52 |