/* * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)system.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> #include <sys/wait.h> #include <signal.h> #include <stdlib.h> #include <stddef.h> #include <unistd.h> #include <paths.h> system(command) const char *command; { union wait pstat; pid_t pid; int omask; sig_t intsave, quitsave; if (!command) /* just checking... */ return(1); omask = sigblock(sigmask(SIGCHLD)); switch(pid = vfork()) { case -1: /* error */ (void)sigsetmask(omask); pstat.w_status = 0; pstat.w_retcode = 127; return(pstat.w_status); case 0: /* child */ (void)sigsetmask(omask); execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL); _exit(127); } intsave = signal(SIGINT, SIG_IGN); quitsave = signal(SIGQUIT, SIG_IGN); pid = waitpid(pid, (int *)&pstat, 0); (void)sigsetmask(omask); (void)signal(SIGINT, intsave); (void)signal(SIGQUIT, quitsave); return(pid == -1 ? -1 : pstat.w_status); }