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 /*----- Header files ------------------------------------------------------*/
40 /*----- Main code ---------------------------------------------------------*/
42 /* --- @fdflags@ --- *
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
48 * Returns: Zero if successful, @-1@ if not.
50 * Use: Sets file descriptor flags in what is, I hope, an obvious
54 int fdflags(int fd
, unsigned fbic
, unsigned fxor
,
55 unsigned fdbic
, unsigned fdxor
)
60 if ((f
= fcntl(fd
, F_GETFL
)) == -1)
62 ff
= (f
& ~fbic
) ^ fxor
;
63 if (f
!= ff
&& fcntl(fd
, F_SETFL
, ff
) == -1)
67 if ((f
= fcntl(fd
, F_GETFD
)) == -1)
69 ff
= (f
& ~fdbic
) ^ fdxor
;
70 if (f
!= ff
&& fcntl(fd
, F_SETFD
, ff
) == -1)
76 /*----- That's all, folks -------------------------------------------------*/