122110Smckusick /* 238790Skarels * Copyright (c) 1989 Regents of the University of California. 335302Sbostic * All rights reserved. 435302Sbostic * 5*42626Sbostic * %sccs.include.redist.c% 622110Smckusick */ 718295Smckusick 826590Sdonn #if defined(LIBC_SCCS) && !defined(lint) 9*42626Sbostic static char sccsid[] = "@(#)siginterrupt.c 5.5 (Berkeley) 06/01/90"; 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 */ 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