1 #define NOPLAN9DEFINES
2 #include <lib9.h>
3 
4 int
5 p9rfork(int flags)
6 {
7 	int pid;
8 
9 	if((flags&(RFPROC|RFFDG|RFMEM)) == (RFPROC|RFFDG)){
10 		/* check other flags before we commit */
11 		flags &= ~(RFPROC|RFFDG);
12 		if(flags & ~(RFNOTEG|RFNAMEG)){
13 			werrstr("unknown flags %08ux in rfork", flags);
14 			return -1;
15 		}
16 		pid = fork();
17 		if(pid != 0)
18 			return pid;
19 	}
20 	if(flags&RFPROC){
21 		werrstr("cannot use rfork for shared memory -- use ffork");
22 		return -1;
23 	}
24 	if(flags&RFNAMEG){
25 		/* XXX set $NAMESPACE to a new directory */
26 		flags &= ~RFNAMEG;
27 	}
28 	if(flags&RFNOTEG){
29 		setpgid(0, getpid());
30 		flags &= ~RFNOTEG;
31 	}
32 	if(flags){
33 		werrstr("unknown flags %08ux in rfork", flags);
34 		return -1;
35 	}
36 	return 0;
37 }