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glibc  2.9
alarm.c
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00001 /* Copyright (C) 1991,95,96,97,2002 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 <errno.h>
00020 #include <unistd.h>
00021 
00022 /* Schedule an alarm.  In SECONDS seconds, the process will get a SIGALRM.
00023    If SECONDS is zero, any currently scheduled alarm will be cancelled.
00024    The function returns the number of seconds remaining until the last
00025    alarm scheduled would have signaled, or zero if there wasn't one.
00026    There is no return value to indicate an error, but you can set `errno'
00027    to 0 and check its value after calling `alarm', and this might tell you.
00028    The signal may come late due to processor scheduling.  */
00029 unsigned int
00030 alarm (seconds)
00031      unsigned int seconds;
00032 {
00033   __set_errno (ENOSYS);
00034   return 0;
00035 }
00036 libc_hidden_def (alarm)
00037 
00038 stub_warning (alarm)
00039 #include <stub-tag.h>