1 b2cfc4e2 2003-09-30 devnull #include <sched.h>
 2 b2cfc4e2 2003-09-30 devnull #include <signal.h>
 3 b2cfc4e2 2003-09-30 devnull #include <lib9.h>
 4 b2cfc4e2 2003-09-30 devnull 
 5 b2cfc4e2 2003-09-30 devnull int fforkstacksize = 16384;
 6 b2cfc4e2 2003-09-30 devnull 
 7 b2cfc4e2 2003-09-30 devnull int
 8 b2cfc4e2 2003-09-30 devnull ffork(int flags, void (*fn)(void*), void *arg)
 9 b2cfc4e2 2003-09-30 devnull {
10 b2cfc4e2 2003-09-30 devnull 	char *p;
11 b2cfc4e2 2003-09-30 devnull 	int cloneflag, pid;
12 b2cfc4e2 2003-09-30 devnull 
13 b2cfc4e2 2003-09-30 devnull 	p = malloc(fforkstacksize);
14 b2cfc4e2 2003-09-30 devnull 	if(p == nil)
15 b2cfc4e2 2003-09-30 devnull 		return -1;
16 b2cfc4e2 2003-09-30 devnull 	cloneflag = 0;
17 b2cfc4e2 2003-09-30 devnull 	flags &= ~RFPROC;
18 b2cfc4e2 2003-09-30 devnull 	if(flags&RFMEM){
19 b2cfc4e2 2003-09-30 devnull 		cloneflag |= CLONE_VM;
20 b2cfc4e2 2003-09-30 devnull 		flags &= ~RFMEM;
21 b2cfc4e2 2003-09-30 devnull 	}
22 b2cfc4e2 2003-09-30 devnull 	if(!(flags&RFFDG))
23 b2cfc4e2 2003-09-30 devnull 		cloneflag |= CLONE_FILES;
24 b2cfc4e2 2003-09-30 devnull 	else
25 b2cfc4e2 2003-09-30 devnull 		flags &= ~RFFDG;
26 b2cfc4e2 2003-09-30 devnull 	if(!(flags&RFNOWAIT))
27 b2cfc4e2 2003-09-30 devnull 		cloneflag |= SIGCHLD;
28 b2cfc4e2 2003-09-30 devnull 	else
29 b2cfc4e2 2003-09-30 devnull 		flags &= ~RFNOWAIT;
30 b2cfc4e2 2003-09-30 devnull 	if(flags){
31 b2cfc4e2 2003-09-30 devnull 		fprint(2, "unknown rfork flags %x\n", flags);
32 b2cfc4e2 2003-09-30 devnull 		return -1;
33 b2cfc4e2 2003-09-30 devnull 	}
34 b2cfc4e2 2003-09-30 devnull 	pid = clone((int(*)(void*))fn, p+fforkstacksize-16, cloneflag, arg);
35 b2cfc4e2 2003-09-30 devnull 	if(pid < 0)
36 b2cfc4e2 2003-09-30 devnull 		free(p);
37 b2cfc4e2 2003-09-30 devnull 	return pid;
38 b2cfc4e2 2003-09-30 devnull }
39 b2cfc4e2 2003-09-30 devnull 
40 a995e477 2003-10-01 devnull int
41 a995e477 2003-10-01 devnull getfforkid(void)
42 a995e477 2003-10-01 devnull {
43 a995e477 2003-10-01 devnull 	return getpid();
44 a995e477 2003-10-01 devnull }
45 a995e477 2003-10-01 devnull