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Last change
on this file since 3320 was 3320, checked in by Bruno Cornec, 9 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
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-
Property svn:eol-style
set to
native
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File size:
641 bytes
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| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 8 | */
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| 9 |
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| 10 | #include "libbb.h"
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| 11 |
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| 12 | /* try to open up the specified device */
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| 13 | int FAST_FUNC device_open(const char *device, int mode)
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| 14 | {
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| 15 | int m, f, fd;
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| 16 |
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| 17 | m = mode | O_NONBLOCK;
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| 18 |
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| 19 | /* Retry up to 5 times */
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| 20 | /* TODO: explain why it can't be considered insane */
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| 21 | for (f = 0; f < 5; f++) {
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| 22 | fd = open(device, m, 0600);
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| 23 | if (fd >= 0)
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| 24 | break;
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| 25 | }
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| 26 | if (fd < 0)
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| 27 | return fd;
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| 28 | /* Reset original flags. */
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| 29 | if (m != mode)
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| 30 | fcntl(fd, F_SETFL, mode);
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| 31 | return fd;
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| 32 | }
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