Line | |
---|
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 tarball for details.
|
---|
8 | */
|
---|
9 |
|
---|
10 | #include "libbb.h"
|
---|
11 |
|
---|
12 | /* try to open up the specified device */
|
---|
13 | int device_open(const char *device, int mode)
|
---|
14 | {
|
---|
15 | int m, f, fd = -1;
|
---|
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 | if ((fd = open(device, m, 0600)) >= 0)
|
---|
23 | break;
|
---|
24 | if (fd < 0)
|
---|
25 | return fd;
|
---|
26 | /* Reset original flags. */
|
---|
27 | if (m != mode)
|
---|
28 | fcntl(fd, F_SETFL, mode);
|
---|
29 | return fd;
|
---|
30 | }
|
---|
Note:
See
TracBrowser
for help on using the repository browser.