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Annotation of src/usr.bin/window/wwspawn.c, Revision 1.4

1.4     ! deraadt     1: /*     $OpenBSD: wwspawn.c,v 1.3 1996/06/26 05:43:52 deraadt Exp $     */
1.2       deraadt     2: /*     $NetBSD: wwspawn.c,v 1.4 1995/12/21 08:39:57 mycroft Exp $      */
1.1       deraadt     3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Edward Wang at The University of California, Berkeley.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the University of
                     22:  *     California, Berkeley and its contributors.
                     23:  * 4. Neither the name of the University nor the names of its contributors
                     24:  *    may be used to endorse or promote products derived from this software
                     25:  *    without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     28:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     30:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     31:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     32:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     33:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     34:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     35:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     36:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     37:  * SUCH DAMAGE.
                     38:  */
                     39:
                     40: #ifndef lint
                     41: #if 0
                     42: static char sccsid[] = "@(#)wwspawn.c  8.1 (Berkeley) 6/6/93";
                     43: #else
1.4     ! deraadt    44: static char rcsid[] = "$OpenBSD: wwspawn.c,v 1.3 1996/06/26 05:43:52 deraadt Exp $";
1.1       deraadt    45: #endif
                     46: #endif /* not lint */
                     47:
                     48: #include "ww.h"
                     49: #include <sys/signal.h>
1.4     ! deraadt    50: #include <stdio.h>
1.1       deraadt    51:
                     52: /*
                     53:  * There is a dead lock with vfork and closing of pseudo-ports.
                     54:  * So we have to be sneaky about error reporting.
                     55:  */
                     56: wwspawn(wp, file, argv)
                     57: register struct ww *wp;
                     58: char *file;
                     59: char **argv;
                     60: {
                     61:        int pid;
                     62:        int ret;
                     63:        char erred = 0;
1.2       deraadt    64:        sigset_t sigset, osigset;
                     65:
                     66:        sigemptyset(&sigset);
                     67:        sigaddset(&sigset, SIGCHLD);
                     68:        sigprocmask(SIG_BLOCK, &sigset, &osigset);
1.1       deraadt    69:
                     70:        switch (pid = vfork()) {
                     71:        case -1:
                     72:                wwerrno = WWE_SYS;
                     73:                ret = -1;
                     74:                break;
                     75:        case 0:
                     76:                if (wwenviron(wp) >= 0)
                     77:                        execvp(file, argv);
                     78:                erred = 1;
                     79:                _exit(1);
                     80:        default:
1.4     ! deraadt    81:                (void) wait(NULL);
1.1       deraadt    82:                if (erred) {
                     83:                        wwerrno = WWE_SYS;
                     84:                        ret = -1;
                     85:                } else {
                     86:                        wp->ww_pid = pid;
                     87:                        wp->ww_state = WWS_HASPROC;
                     88:                        ret = pid;
                     89:                }
                     90:        }
1.2       deraadt    91:
                     92:        sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
                     93:
1.1       deraadt    94:        if (wp->ww_socket >= 0) {
                     95:                (void) close(wp->ww_socket);
                     96:                wp->ww_socket = -1;
                     97:        }
                     98:        return ret;
                     99: }