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From: Didier Derny <didier@omnix.fr.org>
Message-Id: <199507280725.JAA12056@zapata.omnix.fr.org>
Subject: Re: sleep / alarm conflict
To: freebsd-questions@freebsd.org
Date: Fri, 28 Jul 1995 09:25:23 +0200 (MET DST)
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 this sequence:
 
 #include <stdio.h>
 #include <sys/types.h>
 #include <setjmp.h>
 #include <limits.h>
 #include <float.h>
 #include <fcntl.h>
 #include <signal.h>
 
 
 static jmp_buf jumpenv;
 
 ReadLineAlarm()
 {
   signal(SIGALRM, SIG_IGN);
   alarm(0);
   fprintf(stderr, "alarm signal caught\n");
   longjmp(jumpenv, 1);
 }
 
 main()
 {
   signal(SIGALRM, ReadLineAlarm);
   if (setjmp(jumpenv) != 0) 
     return;
   alarm(2);
   for (;;)
     sleep(1);
 }
 
 never end.
 
 Is it normal or a bug.
 
 
 this sequence works if alarm is replaced by an infinite loop.
 
 
 +---------------------+
 | Didier Derny        |
 | didier@omnix.fr.org |
 +---------------------+