diff options
Diffstat (limited to 'sys/kern/kern_descrip.c')
| -rw-r--r-- | sys/kern/kern_descrip.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c index a0130842aacb..e8e08f57196b 100644 --- a/sys/kern/kern_descrip.c +++ b/sys/kern/kern_descrip.c @@ -2960,6 +2960,38 @@ fget_cap(struct thread *td, int fd, cap_rights_t *needrightsp, } #endif +int +fget_remote(struct thread *td, struct proc *p, int fd, struct file **fpp) +{ + struct filedesc *fdp; + struct file *fp; + int error; + + if (p == td->td_proc) /* curproc */ + return (fget_unlocked(td, fd, &cap_no_rights, fpp)); + + PROC_LOCK(p); + fdp = fdhold(p); + PROC_UNLOCK(p); + if (fdp == NULL) + return (ENOENT); + FILEDESC_SLOCK(fdp); + if (refcount_load(&fdp->fd_refcnt) != 0) { + fp = fget_noref(fdp, fd); + if (fp != NULL && fhold(fp)) { + *fpp = fp; + error = 0; + } else { + error = EBADF; + } + } else { + error = ENOENT; + } + FILEDESC_SUNLOCK(fdp); + fddrop(fdp); + return (error); +} + #ifdef CAPABILITIES int fgetvp_lookup_smr(struct nameidata *ndp, struct vnode **vpp, bool *fsearch) |