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Annotation of src/usr.bin/window/wwspawn.c, Revision 1.10

1.10    ! david       1: /*     $OpenBSD: wwspawn.c,v 1.9 2003/07/10 00:06:52 david 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.
1.8       millert    19:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #ifndef lint
                     37: #if 0
                     38: static char sccsid[] = "@(#)wwspawn.c  8.1 (Berkeley) 6/6/93";
                     39: #else
1.10    ! david      40: static char rcsid[] = "$OpenBSD: wwspawn.c,v 1.9 2003/07/10 00:06:52 david Exp $";
1.1       deraadt    41: #endif
                     42: #endif /* not lint */
                     43:
                     44: #include "ww.h"
                     45: #include <sys/signal.h>
1.10    ! david      46: #include <signal.h>
1.9       david      47: #include <unistd.h>
1.1       deraadt    48:
                     49: /*
                     50:  * There is a dead lock with vfork and closing of pseudo-ports.
                     51:  * So we have to be sneaky about error reporting.
                     52:  */
                     53: wwspawn(wp, file, argv)
1.6       mpech      54: struct ww *wp;
1.1       deraadt    55: char *file;
                     56: char **argv;
                     57: {
1.7       mpech      58:        pid_t pid;
                     59:        pid_t ret;
1.1       deraadt    60:        char erred = 0;
1.2       deraadt    61:        sigset_t sigset, osigset;
                     62:
                     63:        sigemptyset(&sigset);
                     64:        sigaddset(&sigset, SIGCHLD);
                     65:        sigprocmask(SIG_BLOCK, &sigset, &osigset);
1.1       deraadt    66:
                     67:        switch (pid = vfork()) {
                     68:        case -1:
                     69:                wwerrno = WWE_SYS;
                     70:                ret = -1;
                     71:                break;
                     72:        case 0:
                     73:                if (wwenviron(wp) >= 0)
                     74:                        execvp(file, argv);
                     75:                erred = 1;
                     76:                _exit(1);
                     77:        default:
                     78:                if (erred) {
                     79:                        wwerrno = WWE_SYS;
                     80:                        ret = -1;
                     81:                } else {
                     82:                        wp->ww_pid = pid;
                     83:                        wp->ww_state = WWS_HASPROC;
                     84:                        ret = pid;
                     85:                }
                     86:        }
1.2       deraadt    87:
                     88:        sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
                     89:
1.1       deraadt    90:        if (wp->ww_socket >= 0) {
                     91:                (void) close(wp->ww_socket);
                     92:                wp->ww_socket = -1;
                     93:        }
                     94:        return ret;
                     95: }