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) 06/29/88"; 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 } 67