1 /* 2 * Copyright (c) 1988 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)system.c 5.3 (Berkeley) 09/22/88"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include <sys/wait.h> 23 #include <sys/signal.h> 24 #include <stdio.h> 25 26 system(command) 27 char *command; 28 { 29 int pid, wval, (*i)(), (*q)(); 30 union wait stat_loc; 31 32 switch(pid = vfork()) { 33 case -1: /* error */ 34 stat_loc.w_status = 0; 35 stat_loc.w_retcode = 127; 36 return(stat_loc.w_status); 37 case 0: /* child */ 38 execl("/bin/sh", "sh", "-c", command, (char *)NULL); 39 _exit(127); 40 } 41 i = signal(SIGINT, SIG_IGN); 42 q = signal(SIGQUIT, SIG_IGN); 43 while ((wval = wait(&stat_loc)) != pid && wval != -1); 44 (void)signal(SIGINT, i); 45 (void)signal(SIGQUIT, q); 46 return(wval == -1 ? -1 : stat_loc.w_status); 47 } 48