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Annotation of src/usr.bin/window/wwspawn.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: wwspawn.c,v 1.3 1995/09/28 10:35:55 tls Exp $  */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1983, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * This code is derived from software contributed to Berkeley by
        !             8:  * Edward Wang at The University of California, Berkeley.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  */
        !            38:
        !            39: #ifndef lint
        !            40: #if 0
        !            41: static char sccsid[] = "@(#)wwspawn.c  8.1 (Berkeley) 6/6/93";
        !            42: #else
        !            43: static char rcsid[] = "$NetBSD: wwspawn.c,v 1.3 1995/09/28 10:35:55 tls Exp $";
        !            44: #endif
        !            45: #endif /* not lint */
        !            46:
        !            47: #include "ww.h"
        !            48: #include <sys/signal.h>
        !            49:
        !            50: /*
        !            51:  * There is a dead lock with vfork and closing of pseudo-ports.
        !            52:  * So we have to be sneaky about error reporting.
        !            53:  */
        !            54: wwspawn(wp, file, argv)
        !            55: register struct ww *wp;
        !            56: char *file;
        !            57: char **argv;
        !            58: {
        !            59:        int pid;
        !            60:        int ret;
        !            61:        char erred = 0;
        !            62:        int s;
        !            63:
        !            64:        s = sigblock(sigmask(SIGCHLD));
        !            65:        switch (pid = vfork()) {
        !            66:        case -1:
        !            67:                wwerrno = WWE_SYS;
        !            68:                ret = -1;
        !            69:                break;
        !            70:        case 0:
        !            71:                if (wwenviron(wp) >= 0)
        !            72:                        execvp(file, argv);
        !            73:                erred = 1;
        !            74:                _exit(1);
        !            75:        default:
        !            76:                if (erred) {
        !            77:                        wwerrno = WWE_SYS;
        !            78:                        ret = -1;
        !            79:                } else {
        !            80:                        wp->ww_pid = pid;
        !            81:                        wp->ww_state = WWS_HASPROC;
        !            82:                        ret = pid;
        !            83:                }
        !            84:        }
        !            85:        (void) sigsetmask(s);
        !            86:        if (wp->ww_socket >= 0) {
        !            87:                (void) close(wp->ww_socket);
        !            88:                wp->ww_socket = -1;
        !            89:        }
        !            90:        return ret;
        !            91: }