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1 | /* -*-c-*- |
| 2 | * |
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3 | * $Id: fdflags.c,v 1.2 2004/04/08 01:36:11 mdw Exp $ |
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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 | |
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30 | /*----- Header files ------------------------------------------------------*/ |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <string.h> |
| 35 | |
| 36 | #include <fcntl.h> |
| 37 | |
| 38 | #include "fdflags.h" |
| 39 | |
| 40 | /*----- Main code ---------------------------------------------------------*/ |
| 41 | |
| 42 | /* --- @fdflags@ --- * |
| 43 | * |
| 44 | * Arguments: @int fd@ = file descriptor to fiddle with |
| 45 | * @unsigned fbic, fxor@ = file flags to set and clear |
| 46 | * @unsigned fdbic, fdxor@ = descriptor flags to set and clear |
| 47 | * |
| 48 | * Returns: Zero if successful, @-1@ if not. |
| 49 | * |
| 50 | * Use: Sets file descriptor flags in what is, I hope, an obvious |
| 51 | * way. |
| 52 | */ |
| 53 | |
| 54 | int fdflags(int fd, unsigned fbic, unsigned fxor, |
| 55 | unsigned fdbic, unsigned fdxor) |
| 56 | { |
| 57 | int f; |
| 58 | |
| 59 | if ((f = fcntl(fd, F_GETFL)) == -1 || |
| 60 | fcntl(fd, F_SETFL, (f & ~fbic) ^ fxor) == -1 || |
| 61 | (f = fcntl(fd, F_GETFD)) == -1 || |
| 62 | fcntl(fd, F_SETFD, (f & ~fdbic) ^ fdxor) == -1) |
| 63 | return (-1); |
| 64 | return (0); |
| 65 | } |
| 66 | |
| 67 | /*----- That's all, folks -------------------------------------------------*/ |
~mdw / mLib / blame