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Annotation of 43BSDTahoe/ucb/window/wwspawn.c, revision 1.1.1.1

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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