diff options
Diffstat (limited to 'sys/kern/kern_descrip.c')
-rw-r--r-- | sys/kern/kern_descrip.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c index 1221825..30bb84a 100644 --- a/sys/kern/kern_descrip.c +++ b/sys/kern/kern_descrip.c @@ -1128,6 +1128,42 @@ kern_close(td, fd) return (error); } +/* + * Close open file descriptors. + */ +#ifndef _SYS_SYSPROTO_H_ +struct closefrom_args { + int lowfd; +}; +#endif +/* ARGSUSED */ +int +closefrom(struct thread *td, struct closefrom_args *uap) +{ + struct filedesc *fdp; + int fd; + + fdp = td->td_proc->p_fd; + AUDIT_ARG(fd, uap->lowfd); + + /* + * Treat negative starting file descriptor values identical to + * closefrom(0) which closes all files. + */ + if (uap->lowfd < 0) + uap->lowfd = 0; + FILEDESC_SLOCK(fdp); + for (fd = uap->lowfd; fd < fdp->fd_nfiles; fd++) { + if (fdp->fd_ofiles[fd] != NULL) { + FILEDESC_SUNLOCK(fdp); + (void)kern_close(td, fd); + FILEDESC_SLOCK(fdp); + } + } + FILEDESC_SUNLOCK(fdp); + return (0); +} + #if defined(COMPAT_43) /* * Return status information about a file descriptor. |