Annotation of /trunk/mkinitrd-magellan/busybox/miscutils/readahead.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
File MIME type: text/plain
File size: 907 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
File MIME type: text/plain
File size: 907 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * readahead implementation for busybox | ||
4 | * | ||
5 | * Preloads the given files in RAM, to reduce access time. | ||
6 | * Does this by calling the readahead(2) system call. | ||
7 | * | ||
8 | * Copyright (C) 2006 Michael Opdenacker <michael@free-electrons.com> | ||
9 | * | ||
10 | * Licensed under GPLv2 or later, see file License in this tarball for details. | ||
11 | */ | ||
12 | |||
13 | niro | 816 | #include "libbb.h" |
14 | niro | 532 | |
15 | niro | 816 | int readahead_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
16 | niro | 984 | int readahead_main(int argc UNUSED_PARAM, char **argv) |
17 | niro | 532 | { |
18 | int retval = EXIT_SUCCESS; | ||
19 | |||
20 | niro | 984 | if (!argv[1]) { |
21 | bb_show_usage(); | ||
22 | } | ||
23 | niro | 532 | |
24 | while (*++argv) { | ||
25 | niro | 816 | int fd = open_or_warn(*argv, O_RDONLY); |
26 | if (fd >= 0) { | ||
27 | off_t len; | ||
28 | int r; | ||
29 | niro | 532 | |
30 | niro | 816 | /* fdlength was reported to be unreliable - use seek */ |
31 | len = xlseek(fd, 0, SEEK_END); | ||
32 | xlseek(fd, 0, SEEK_SET); | ||
33 | r = readahead(fd, 0, len); | ||
34 | close(fd); | ||
35 | if (r >= 0) | ||
36 | continue; | ||
37 | niro | 532 | } |
38 | retval = EXIT_FAILURE; | ||
39 | } | ||
40 | |||
41 | return retval; | ||
42 | } |