diff options
Diffstat (limited to 'sys/kern/kern_sig.c')
| -rw-r--r-- | sys/kern/kern_sig.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 4aa5bd87f1d..298f3caace6 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_sig.c,v 1.16 1997/02/01 21:49:41 deraadt Exp $ */ +/* $OpenBSD: kern_sig.c,v 1.17 1997/08/31 20:42:18 deraadt Exp $ */ /* $NetBSD: kern_sig.c,v 1.54 1996/04/22 01:38:32 christos Exp $ */ /* @@ -483,6 +483,46 @@ killpg1(cp, signum, pgid, all) return (nfound ? 0 : ESRCH); } +#define CANDELIVER(uid, euid, p) \ + (euid == 0 || \ + (uid) == (p)->p_cred->p_ruid || \ + (uid) == (p)->p_cred->p_svuid || \ + (uid) == (p)->p_ucred->cr_uid || \ + (euid) == (p)->p_cred->p_ruid || \ + (euid) == (p)->p_cred->p_svuid || \ + (euid) == (p)->p_ucred->cr_uid) + +/* + * Deliver signum to pgid, but first check uid/euid against each + * process and see if it is permitted. + */ +void +csignal(pgid, signum, uid, euid) + pid_t pgid; + int signum; + uid_t uid, euid; +{ + struct pgrp *pgrp; + struct proc *p; + + if (pgid == 0) + return; + if (pgid < 0) { + pgid = -pgid; + if ((pgrp = pgfind(pgid)) == NULL) + return; + for (p = pgrp->pg_members.lh_first; p; + p = p->p_pglist.le_next) + if (CANDELIVER(uid, euid, p)) + psignal(p, signum); + } else { + if ((p = pfind(pgid)) == NULL) + return; + if (CANDELIVER(uid, euid, p)) + psignal(p, signum); + } +} + /* * Send a signal to a process group. */ |