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Diffstat (limited to 'manual/examples/sigh1.c')
-rw-r--r-- | manual/examples/sigh1.c | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/manual/examples/sigh1.c b/manual/examples/sigh1.c deleted file mode 100644 index 6d4a0752f3..0000000000 --- a/manual/examples/sigh1.c +++ /dev/null @@ -1,53 +0,0 @@ -/* Signal Handlers that Return - Copyright (C) 1991-2017 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License - as published by the Free Software Foundation; either version 2 - of the License, or (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, if not, see <http://www.gnu.org/licenses/>. -*/ - -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> - -/* This flag controls termination of the main loop. */ -volatile sig_atomic_t keep_going = 1; - -/* The signal handler just clears the flag and re-enables itself. */ -void -catch_alarm (int sig) -{ - keep_going = 0; - signal (sig, catch_alarm); -} - -void -do_stuff (void) -{ - puts ("Doing stuff while waiting for alarm...."); -} - -int -main (void) -{ - /* Establish a handler for SIGALRM signals. */ - signal (SIGALRM, catch_alarm); - - /* Set an alarm to go off in a little while. */ - alarm (2); - - /* Check the flag once in a while to see when to quit. */ - while (keep_going) - do_stuff (); - - return EXIT_SUCCESS; -} |