3 * Manipulates flags on file descriptors
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the mLib utilities library.
12 * mLib is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * mLib is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with mLib; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 /*----- Header files ------------------------------------------------------*/
38 /*----- Main code ---------------------------------------------------------*/
40 /* --- @fdflags@ --- *
42 * Arguments: @int fd@ = file descriptor to fiddle with
43 * @unsigned fbic, fxor@ = file flags to set and clear
44 * @unsigned fdbic, fdxor@ = descriptor flags to set and clear
46 * Returns: Zero if successful, @-1@ if not.
48 * Use: Sets file descriptor flags in what is, I hope, an obvious
52 int fdflags(int fd
, unsigned fbic
, unsigned fxor
,
53 unsigned fdbic
, unsigned fdxor
)
58 if ((f
= fcntl(fd
, F_GETFL
)) == -1)
60 ff
= (f
& ~fbic
) ^ fxor
;
61 if (f
!= ff
&& fcntl(fd
, F_SETFL
, ff
) == -1)
65 if ((f
= fcntl(fd
, F_GETFD
)) == -1)
67 ff
= (f
& ~fdbic
) ^ fdxor
;
68 if (f
!= ff
&& fcntl(fd
, F_SETFD
, ff
) == -1)
74 /*----- That's all, folks -------------------------------------------------*/