33 lines
639 B
C
33 lines
639 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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/* try to open up the specified device */
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int device_open(const char *device, int mode)
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{
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int m, f, fd;
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m = mode | O_NONBLOCK;
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/* Retry up to 5 times */
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/* TODO: explain why it can't be considered insane */
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for (f = 0; f < 5; f++) {
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fd = open(device, m, 0600);
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if (fd >= 0)
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break;
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}
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if (fd < 0)
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return fd;
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/* Reset original flags. */
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if (m != mode)
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fcntl(fd, F_SETFL, mode);
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return fd;
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}
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