3 * $Id: fdflags.c,v 1.1 1999/07/26 23:16:59 mdw Exp $
5 * Manipulates flags on file descriptors
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the mLib utilities library.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.1 1999/07/26 23:16:59 mdw
34 * Manipulate file descriptor flags.
38 /*----- Header files ------------------------------------------------------*/
48 /*----- Main code ---------------------------------------------------------*/
50 /* --- @fdflags@ --- *
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
56 * Returns: Zero if successful, @-1@ if not.
58 * Use: Sets file descriptor flags in what is, I hope, an obvious
62 int fdflags(int fd, unsigned fbic, unsigned fxor,
63 unsigned fdbic, unsigned fdxor)
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)
75 /*----- That's all, folks -------------------------------------------------*/