1 #include <u.h>
2 #define NOPLAN9DEFINES
3 #include <libc.h>
4 
5 #include <signal.h>
6 
7 
8 extern int _p9strsig(char*);
9 
10 int
11 postnote(int who, int pid, char *msg)
12 {
13 	int sig;
14 
15 	sig = _p9strsig(msg);
16 	if(sig == 0){
17 		werrstr("unknown note");
18 		return -1;
19 	}
20 
21 	if(pid <= 0){
22 		werrstr("bad pid in postnote");
23 		return -1;
24 	}
25 
26 	switch(who){
27 	default:
28 		werrstr("bad who in postnote");
29 		return -1;
30 	case PNPROC:
31 		return kill(pid, sig);
32 	case PNGROUP:
33 		if((pid = getpgid(pid)) < 0)
34 			return -1;
35 		return killpg(pid, sig);
36 	}
37 }