1 #include <u.h>
2 #include <libc.h>
3 #include "9proc.h"
4 #undef rfork
5 
6 int
7 p9rfork(int flags)
8 {
9 	int pid;
10 
11 	if((flags&(RFPROC|RFFDG|RFMEM)) == (RFPROC|RFFDG)){
12 		/* check other flags before we commit */
13 		flags &= ~(RFPROC|RFFDG);
14 		if(flags & ~(RFNOTEG|RFNAMEG)){
15 			werrstr("unknown flags %08ux in rfork", flags);
16 			return -1;
17 		}
18 		pid = fork();
19 		_p9uproc(0);
20 		if(pid != 0)
21 			return pid;
22 	}
23 	if(flags&RFPROC){
24 		werrstr("cannot use rfork for shared memory -- use ffork");
25 		return -1;
26 	}
27 	if(flags&RFNAMEG){
28 		/* XXX set $NAMESPACE to a new directory */
29 		flags &= ~RFNAMEG;
30 	}
31 	if(flags&RFNOTEG){
32 		setpgid(0, getpid());
33 		flags &= ~RFNOTEG;
34 	}
35 	if(flags){
36 		werrstr("unknown flags %08ux in rfork", flags);
37 		return -1;
38 	}
39 	return 0;
40 }