busybox/libbb/device_open.c
Denys Vlasenko 0ef64bdb40 *: make GNU licensing statement forms more regular
This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-08-16 20:14:46 +02:00

33 lines
641 B
C

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