135701Sbostic /* 235701Sbostic * Copyright (c) 1988 The Regents of the University of California. 335701Sbostic * All rights reserved. 435701Sbostic * 5*42635Sbostic * %sccs.include.redist.c% 635701Sbostic */ 735701Sbostic 826603Sdonn #if defined(LIBC_SCCS) && !defined(lint) 9*42635Sbostic static char sccsid[] = "@(#)system.c 5.9 (Berkeley) 06/01/90"; 1035701Sbostic #endif /* LIBC_SCCS and not lint */ 1122120Smckusick 1236680Sbostic #include <sys/types.h> 1342138Sbostic #include <sys/signal.h> 1435701Sbostic #include <sys/wait.h> 1542138Sbostic #include <stdlib.h> 1642123Sbostic #include <stddef.h> 1739192Sbostic #include <paths.h> 182035Swnj 1935701Sbostic system(command) 2035701Sbostic char *command; 212035Swnj { 2236680Sbostic union wait pstat; 2336680Sbostic pid_t pid, waitpid(); 2439192Sbostic int omask; 2539192Sbostic sig_t intsave, quitsave; 262035Swnj 2742123Sbostic if (!command) /* just checking... */ 2842123Sbostic return(1); 2942123Sbostic 3036688Skarels omask = sigblock(sigmask(SIGCHLD)); 3135701Sbostic switch(pid = vfork()) { 3235701Sbostic case -1: /* error */ 3336688Skarels (void)sigsetmask(omask); 3436680Sbostic pstat.w_status = 0; 3536680Sbostic pstat.w_retcode = 127; 3636680Sbostic return(pstat.w_status); 3735701Sbostic case 0: /* child */ 3836688Skarels (void)sigsetmask(omask); 3939192Sbostic execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL); 402035Swnj _exit(127); 412035Swnj } 4239192Sbostic intsave = signal(SIGINT, SIG_IGN); 4339192Sbostic quitsave = signal(SIGQUIT, SIG_IGN); 4436680Sbostic pid = waitpid(pid, &pstat, 0); 4536680Sbostic (void)sigsetmask(omask); 4639192Sbostic (void)signal(SIGINT, intsave); 4739192Sbostic (void)signal(SIGQUIT, quitsave); 4836680Sbostic return(pid == -1 ? -1 : pstat.w_status); 492035Swnj } 50