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glibc  2.9
select.c
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00001 /* Copyright (C) 1991,92,93,94,95,96,97,98,2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <sys/types.h>
00020 #include <sys/time.h>
00021 #include <hurd.h>
00022 #include <hurd/fd.h>
00023 
00024 /* Check the first NFDS descriptors each in READFDS (if not NULL) for read
00025    readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS
00026    (if not NULL) for exceptional conditions.  If TIMEOUT is not NULL, time out
00027    after waiting the interval specified therein.  Returns the number of ready
00028    descriptors, or -1 for errors.  */
00029 int
00030 __select (nfds, readfds, writefds, exceptfds, timeout)
00031      int nfds;
00032      fd_set *readfds;
00033      fd_set *writefds;
00034      fd_set *exceptfds;
00035      struct timeval *timeout;
00036 {
00037   struct timespec ts, *to;
00038 
00039   if (timeout)
00040     {
00041       to = &ts;
00042       TIMEVAL_TO_TIMESPEC (timeout, to);
00043     }
00044   else
00045     to = NULL;
00046 
00047   return _hurd_select (nfds, NULL, readfds, writefds, exceptfds, to, NULL);
00048 }
00049 libc_hidden_def (__select)
00050 weak_alias (__select, select)