Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Utility routines. |
| 4 | * |
| 5 | * Copyright (C) tons of folks. Tracking down who wrote what |
| 6 | * isn't something I'm going to worry about... If you wrote something |
| 7 | * here, please feel free to acknowledge your work. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | * Based in part on code from sash, Copyright (c) 1999 by David I. Bell |
| 24 | * Permission has been granted to redistribute this code under the GPL. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include <fcntl.h> |
| 30 | #include "libbb.h" |
| 31 | |
| 32 | |
| 33 | /* try to open up the specified device */ |
| 34 | extern int device_open(char *device, int mode) |
| 35 | { |
| 36 | int m, f, fd = -1; |
| 37 | |
| 38 | m = mode | O_NONBLOCK; |
| 39 | |
| 40 | /* Retry up to 5 times */ |
| 41 | for (f = 0; f < 5; f++) |
| 42 | if ((fd = open(device, m, 0600)) >= 0) |
| 43 | break; |
| 44 | if (fd < 0) |
| 45 | return fd; |
| 46 | /* Reset original flags. */ |
| 47 | if (m != mode) |
| 48 | fcntl(fd, F_SETFL, mode); |
| 49 | return fd; |
| 50 | } |
| 51 | |
| 52 | /* END CODE */ |
| 53 | /* |
| 54 | Local Variables: |
| 55 | c-file-style: "linux" |
| 56 | c-basic-offset: 4 |
| 57 | tab-width: 4 |
| 58 | End: |
| 59 | */ |