diff options
Diffstat (limited to 'sys/kern/kern_sig.c')
| -rw-r--r-- | sys/kern/kern_sig.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 290917a..29bacee 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)kern_sig.c 8.7 (Berkeley) 4/18/94 - * $Id: kern_sig.c,v 1.47 1998/09/14 23:25:18 jdp Exp $ + * $Id: kern_sig.c,v 1.48 1998/10/21 16:31:38 jdp Exp $ */ #include "opt_compat.h" @@ -86,6 +86,16 @@ SYSCTL_INT(_kern, KERN_LOGSIGEXIT, logsigexit, CTLFLAG_RW, &kern_logsigexit, 0, (pc)->pc_ucred->cr_uid == (q)->p_ucred->cr_uid || \ ((signum) == SIGCONT && (q)->p_session == (p)->p_session)) +/* + * Policy -- Can real uid ruid with ucred uc send a signal to process q? + */ +#define CANSIGIO(ruid, uc, q) \ + ((uc)->cr_uid == 0 || \ + (ruid) == (q)->p_cred->p_ruid || \ + (uc)->cr_uid == (q)->p_cred->p_ruid || \ + (ruid) == (q)->p_ucred->cr_uid || \ + (uc)->cr_uid == (q)->p_ucred->cr_uid) + int sugid_coredump; SYSCTL_INT(_kern, OID_AUTO, sugid_coredump, CTLFLAG_RW, &sugid_coredump, 0, ""); @@ -1344,3 +1354,30 @@ nosys(p, args) psignal(p, SIGSYS); return (EINVAL); } + +/* + * Send a signal to a SIGIO or SIGURG to a process or process group using + * stored credentials rather than those of the current process. + */ +void +pgsigio(sigio, signum, checkctty) + struct sigio *sigio; + int signum, checkctty; +{ + if (sigio == NULL) + return; + + if (sigio->sio_pgid > 0) { + if (CANSIGIO(sigio->sio_ruid, sigio->sio_ucred, + sigio->sio_proc)) + psignal(sigio->sio_proc, signum); + } else if (sigio->sio_pgid < 0) { + struct proc *p; + + for (p = sigio->sio_pgrp->pg_members.lh_first; p != NULL; + p = p->p_pglist.le_next) + if (CANSIGIO(sigio->sio_ruid, sigio->sio_ucred, p) && + (checkctty == 0 || (p->p_flag & P_CONTROLT))) + psignal(p, signum); + } +} |
