135701Sbostic /* 235701Sbostic * Copyright (c) 1988 The Regents of the University of California. 335701Sbostic * All rights reserved. 435701Sbostic * 535701Sbostic * Redistribution and use in source and binary forms are permitted 635701Sbostic * provided that the above copyright notice and this paragraph are 735701Sbostic * duplicated in all such forms and that any documentation, 835701Sbostic * advertising materials, and other materials related to such 935701Sbostic * distribution and use acknowledge that the software was developed 1035701Sbostic * by the University of California, Berkeley. The name of the 1135701Sbostic * University may not be used to endorse or promote products derived 1235701Sbostic * from this software without specific prior written permission. 1335701Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1435701Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 1535701Sbostic * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1635701Sbostic */ 1735701Sbostic 1826603Sdonn #if defined(LIBC_SCCS) && !defined(lint) 19*36688Skarels static char sccsid[] = "@(#)system.c 5.5 (Berkeley) 02/06/89"; 2035701Sbostic #endif /* LIBC_SCCS and not lint */ 2122120Smckusick 2236680Sbostic #include <sys/types.h> 2335701Sbostic #include <sys/wait.h> 2435701Sbostic #include <sys/signal.h> 2535701Sbostic #include <stdio.h> 262035Swnj 2735701Sbostic system(command) 2835701Sbostic char *command; 292035Swnj { 3036680Sbostic union wait pstat; 3136680Sbostic pid_t pid, waitpid(); 32*36688Skarels int omask, (*i)(), (*q)(); 332035Swnj 34*36688Skarels omask = sigblock(sigmask(SIGCHLD)); 3535701Sbostic switch(pid = vfork()) { 3635701Sbostic case -1: /* error */ 37*36688Skarels (void)sigsetmask(omask); 3836680Sbostic pstat.w_status = 0; 3936680Sbostic pstat.w_retcode = 127; 4036680Sbostic return(pstat.w_status); 4135701Sbostic case 0: /* child */ 42*36688Skarels (void)sigsetmask(omask); 4335701Sbostic execl("/bin/sh", "sh", "-c", command, (char *)NULL); 442035Swnj _exit(127); 452035Swnj } 46*36688Skarels i = signal(SIGINT, SIG_IGN); 47*36688Skarels q = signal(SIGQUIT, SIG_IGN); 4836680Sbostic pid = waitpid(pid, &pstat, 0); 4936680Sbostic (void)sigsetmask(omask); 50*36688Skarels (void)signal(SIGINT, i); 51*36688Skarels (void)signal(SIGQUIT, q); 5236680Sbostic return(pid == -1 ? -1 : pstat.w_status); 532035Swnj } 54