00001 /*
00002     setblock (turn blocking on or off)
00003     AUP2, Sec. 4.02.2
00004 
00005     Copyright 2003 by Marc J. Rochkind. All rights reserved.
00006     May be copied only for purposes and under conditions described
00007     on the Web page www.basepath.com/aup/copyright.htm.
00008 
00009     The Example Files are provided "as is," without any warranty;
00010     without even the implied warranty of merchantability or fitness
00011     for a particular purpose. The author and his publisher are not
00012     responsible for any damages, direct or incidental, resulting
00013     from the use or non-use of these Example Files.
00014 
00015     The Example Files may contain defects, and some contain deliberate
00016     coding mistakes that were included for educational reasons.
00017     You are responsible for determining if and how the Example Files
00018     are to be used.
00019 
00020 */
00021 #include "defs.h"
00022 #include "setblock.h"
00023 
00024 /* turn blocking on or off */
00025 /*[setblock]*/
00026 bool setblock(int fd, bool block)
00027 {
00028     int flags;
00029 
00030     ec_neg1( flags = fcntl(fd, F_GETFL) )
00031     if (block)
00032         flags &= ~O_NONBLOCK;
00033     else
00034         flags |= O_NONBLOCK;
00035     ec_neg1( fcntl(fd, F_SETFL, flags) )
00036     return true;
00037 
00038 EC_CLEANUP_BGN
00039     return false;
00040 EC_CLEANUP_END
00041 }
00042 /*[]*/
c4/setblock.c
