122110Smckusick /*
2*61111Sbostic * Copyright (c) 1989, 1993
3*61111Sbostic * The Regents of the University of California. All rights reserved.
435302Sbostic *
542626Sbostic * %sccs.include.redist.c%
622110Smckusick */
718295Smckusick
826590Sdonn #if defined(LIBC_SCCS) && !defined(lint)
9*61111Sbostic static char sccsid[] = "@(#)siginterrupt.c 8.1 (Berkeley) 06/04/93";
1035302Sbostic #endif /* LIBC_SCCS and not lint */
1122110Smckusick
1218295Smckusick #include <signal.h>
1318295Smckusick
1418295Smckusick /*
1518295Smckusick * Set signal state to prevent restart of system calls
1618295Smckusick * after an instance of the indicated signal.
1718295Smckusick */
siginterrupt(sig,flag)1818295Smckusick siginterrupt(sig, flag)
1918295Smckusick int sig, flag;
2018295Smckusick {
2138790Skarels extern sigset_t _sigintr;
2238790Skarels struct sigaction sa;
2318295Smckusick int ret;
2418295Smckusick
2538790Skarels if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0)
2618295Smckusick return (ret);
2738790Skarels if (flag) {
2838790Skarels sigaddset(&_sigintr, sig);
2938790Skarels sa.sa_flags &= ~SA_RESTART;
3038790Skarels } else {
3138790Skarels sigdelset(&_sigintr, sig);
3238790Skarels sa.sa_flags |= SA_RESTART;
3338790Skarels }
3438790Skarels return (sigaction(sig, &sa, (struct sigaction *)0));
3518295Smckusick }
36