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

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)wwspawn.c  3.11 4/24/85";
                      3: #endif
                      4: 
                      5: /*
                      6:  * Copyright (c) 1983 Regents of the University of California,
                      7:  * All rights reserved.  Redistribution permitted subject to
                      8:  * the terms of the Berkeley Software License Agreement.
                      9:  */
                     10: 
                     11: #include "ww.h"
                     12: #include <sys/signal.h>
                     13: 
                     14: /*
                     15:  * There is a dead lock with vfork and closing of pseudo-ports.
                     16:  * So we have to be sneaky about error reporting.
                     17:  */
                     18: wwspawn(wp, file, argv)
                     19: register struct ww *wp;
                     20: char *file;
                     21: char **argv;
                     22: {
                     23:        int pid;
                     24:        int ret;
                     25:        char erred = 0;
                     26:        int s;
                     27: 
                     28:        s = sigblock(sigmask(SIGCHLD));
                     29:        switch (pid = vfork()) {
                     30:        case -1:
                     31:                wwerrno = WWE_SYS;
                     32:                ret = -1;
                     33:                break;
                     34:        case 0:
                     35:                if (wwenviron(wp) >= 0)
                     36:                        execvp(file, argv);
                     37:                erred = 1;
                     38:                _exit(1);
                     39:        default:
                     40:                if (erred) {
                     41:                        wwerrno = WWE_SYS;
                     42:                        ret = -1;
                     43:                } else {
                     44:                        wp->ww_pid = pid;
                     45:                        wp->ww_state = WWS_HASPROC;
                     46:                        ret = pid;
                     47:                }
                     48:        }
                     49:        (void) sigsetmask(s);
                     50:        if (wp->ww_socket >= 0) {
                     51:                (void) close(wp->ww_socket);
                     52:                wp->ww_socket = -1;
                     53:        }
                     54:        return ret;
                     55: }

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