aab9ab9f |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: fdflags.c,v 1.1 1999/07/26 23:16:59 mdw Exp $ |
4 | * |
5 | * Manipulates flags on file descriptors |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the mLib utilities library. |
13 | * |
14 | * mLib is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * mLib is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with mLib; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: fdflags.c,v $ |
33 | * Revision 1.1 1999/07/26 23:16:59 mdw |
34 | * Manipulate file descriptor flags. |
35 | * |
36 | */ |
37 | |
38 | /*----- Header files ------------------------------------------------------*/ |
39 | |
40 | #include <stdio.h> |
41 | #include <stdlib.h> |
42 | #include <string.h> |
43 | |
44 | #include <fcntl.h> |
45 | |
46 | #include "fdflags.h" |
47 | |
48 | /*----- Main code ---------------------------------------------------------*/ |
49 | |
50 | /* --- @fdflags@ --- * |
51 | * |
52 | * Arguments: @int fd@ = file descriptor to fiddle with |
53 | * @unsigned fbic, fxor@ = file flags to set and clear |
54 | * @unsigned fdbic, fdxor@ = descriptor flags to set and clear |
55 | * |
56 | * Returns: Zero if successful, @-1@ if not. |
57 | * |
58 | * Use: Sets file descriptor flags in what is, I hope, an obvious |
59 | * way. |
60 | */ |
61 | |
62 | int fdflags(int fd, unsigned fbic, unsigned fxor, |
63 | unsigned fdbic, unsigned fdxor) |
64 | { |
65 | int f; |
66 | |
67 | if ((f = fcntl(fd, F_GETFL)) == -1 || |
68 | fcntl(fd, F_SETFL, (f & ~fbic) ^ fxor) == -1 || |
69 | (f = fcntl(fd, F_GETFD)) == -1 || |
70 | fcntl(fd, F_SETFD, (f & ~fdbic) ^ fdxor) == -1) |
71 | return (-1); |
72 | return (0); |
73 | } |
74 | |
75 | /*----- That's all, folks -------------------------------------------------*/ |