lint

[unix-history] / usr / src / usr.bin / window / wwspawn.c

#ifndef lint
static  char *sccsid = "@(#)wwspawn.c   3.7 84/01/13";
#endif

#include "ww.h"
#include <signal.h>

/*
* There is a dead lock with vfork and closing of pseudo-ports.
* So we have to be sneaky.
*/
/*VARARGS3*/
wwspawn(wp, file, argv0)
register struct ww *wp;
char *file, *argv0;
{
       extern int errno;
       extern char *sys_errlist[];
       int pid;

       (void) sighold(SIGCHLD);
       switch (pid = vfork()) {
       case -1:
               wwerrno = WWE_SYS;
               (void) sigrelse(SIGCHLD);
               return -1;
       case 0:
               wwenviron(wp);
               errno = 0;
               execv(file, &argv0);
               _exit(1);
       default:
               if (errno != 0) {
                       wwerrno = WWE_SYS;
                       (void) sigrelse(SIGCHLD);
                       return -1;
               } else {
                       wp->ww_pid = pid;
                       wp->ww_state = WWS_HASPROC;
                       (void) sigrelse(SIGCHLD);
                       return pid;
               }
       }
}