diff options
Diffstat (limited to 'sys/kern/kern_prot.c')
| -rw-r--r-- | sys/kern/kern_prot.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c index 56ec0dd..ebe4b18 100644 --- a/sys/kern/kern_prot.c +++ b/sys/kern/kern_prot.c @@ -1800,6 +1800,37 @@ cr_canseesocket(struct ucred *cred, struct socket *so) return (0); } +/*- + * Determine whether td can wait for the exit of p. + * Returns: 0 for permitted, an errno value otherwise + * Locks: Sufficient locks to protect various components of td and p + * must be held. td must be curthread, and a lock must + * be held for p. + * References: td and p must be valid for the lifetime of the call + + */ +int +p_canwait(struct thread *td, struct proc *p) +{ + int error; + + KASSERT(td == curthread, ("%s: td not curthread", __func__)); + PROC_LOCK_ASSERT(p, MA_OWNED); + if ((error = prison_check(td->td_ucred, p->p_ucred))) + return (error); +#ifdef MAC + if ((error = mac_check_proc_wait(td->td_ucred, p))) + return (error); +#endif +#if 0 + /* XXXMAC: This could have odd effects on some shells. */ + if ((error = cr_seeotheruids(td->td_ucred, p->p_ucred))) + return (error); +#endif + + return (0); +} + /* * Allocate a zeroed cred structure. * MPSAFE |
