4.3BSD - /usr/src/ucb/window/wwspawn.c

   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: }

Defined functions

Defined variables