new copyright notice

[unix-history] / usr / src / lib / libc / gen / siginterrupt.c

/*
* Copyright (c) 1989 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)siginterrupt.c      5.5 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <signal.h>

/*
* Set signal state to prevent restart of system calls
* after an instance of the indicated signal.
*/
siginterrupt(sig, flag)
       int sig, flag;
{
       extern sigset_t _sigintr;
       struct sigaction sa;
       int ret;

       if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0)
               return (ret);
       if (flag) {
               sigaddset(&_sigintr, sig);
               sa.sa_flags &= ~SA_RESTART;
       } else {
               sigdelset(&_sigintr, sig);
               sa.sa_flags |= SA_RESTART;
       }
       return (sigaction(sig, &sa, (struct sigaction *)0));
}