source:
MondoRescue/branches/2.2.9/mindi-busybox/libbb/device_open.c@
3387
Last change on this file since 3387 was 3320, checked in by , 10 years ago | |
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File size: 641 bytes |
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1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routines. |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | /* try to open up the specified device */ |
13 | int FAST_FUNC device_open(const char *device, int mode) |
14 | { |
15 | int m, f, fd; |
16 | |
17 | m = mode | O_NONBLOCK; |
18 | |
19 | /* Retry up to 5 times */ |
20 | /* TODO: explain why it can't be considered insane */ |
21 | for (f = 0; f < 5; f++) { |
22 | fd = open(device, m, 0600); |
23 | if (fd >= 0) |
24 | break; |
25 | } |
26 | if (fd < 0) |
27 | return fd; |
28 | /* Reset original flags. */ |
29 | if (m != mode) |
30 | fcntl(fd, F_SETFL, mode); |
31 | return fd; |
32 | } |
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