Contents of /tags/mkinitrd-6_3_1/busybox/libbb/wfopen_input.c
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 1066 byte(s)
tagged 'mkinitrd-6_3_1'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * wfopen_input implementation for busybox |
4 | * |
5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | /* A number of applets need to open a file for reading, where the filename |
11 | * is a command line arg. Since often that arg is '-' (meaning stdin), |
12 | * we avoid testing everywhere by consolidating things in this routine. |
13 | */ |
14 | |
15 | #include "libbb.h" |
16 | |
17 | FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename) |
18 | { |
19 | FILE *fp = stdin; |
20 | |
21 | if (filename != bb_msg_standard_input |
22 | && NOT_LONE_DASH(filename) |
23 | ) { |
24 | fp = fopen_or_warn(filename, "r"); |
25 | } |
26 | return fp; |
27 | } |
28 | |
29 | FILE* FAST_FUNC xfopen_stdin(const char *filename) |
30 | { |
31 | FILE *fp = fopen_or_warn_stdin(filename); |
32 | if (fp) |
33 | return fp; |
34 | xfunc_die(); /* We already output an error message. */ |
35 | } |
36 | |
37 | int FAST_FUNC open_or_warn_stdin(const char *filename) |
38 | { |
39 | int fd = STDIN_FILENO; |
40 | |
41 | if (filename != bb_msg_standard_input |
42 | && NOT_LONE_DASH(filename) |
43 | ) { |
44 | fd = open_or_warn(filename, O_RDONLY); |
45 | } |
46 | |
47 | return fd; |
48 | } |