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Annotation of 43BSDTahoe/ucb/window/wwspawn.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)wwspawn.c  3.13 (Berkeley) 6/29/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include "ww.h"
        !            23: #include <sys/signal.h>
        !            24: 
        !            25: /*
        !            26:  * There is a dead lock with vfork and closing of pseudo-ports.
        !            27:  * So we have to be sneaky about error reporting.
        !            28:  */
        !            29: wwspawn(wp, file, argv)
        !            30: register struct ww *wp;
        !            31: char *file;
        !            32: char **argv;
        !            33: {
        !            34:        int pid;
        !            35:        int ret;
        !            36:        char erred = 0;
        !            37:        int s;
        !            38: 
        !            39:        s = sigblock(sigmask(SIGCHLD));
        !            40:        switch (pid = vfork()) {
        !            41:        case -1:
        !            42:                wwerrno = WWE_SYS;
        !            43:                ret = -1;
        !            44:                break;
        !            45:        case 0:
        !            46:                if (wwenviron(wp) >= 0)
        !            47:                        execvp(file, argv);
        !            48:                erred = 1;
        !            49:                _exit(1);
        !            50:        default:
        !            51:                if (erred) {
        !            52:                        wwerrno = WWE_SYS;
        !            53:                        ret = -1;
        !            54:                } else {
        !            55:                        wp->ww_pid = pid;
        !            56:                        wp->ww_state = WWS_HASPROC;
        !            57:                        ret = pid;
        !            58:                }
        !            59:        }
        !            60:        (void) sigsetmask(s);
        !            61:        if (wp->ww_socket >= 0) {
        !            62:                (void) close(wp->ww_socket);
        !            63:                wp->ww_socket = -1;
        !            64:        }
        !            65:        return ret;
        !            66: }

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