1 /* $OpenBSD: sandbox-rlimit.c,v 1.4 2016/09/12 01:22:38 deraadt Exp $ */
3 * Copyright (c) 2011 Damien Miller <djm@mindrot.org>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #include <sys/types.h>
24 #include <sys/resource.h>
34 #include "ssh-sandbox.h"
37 /* Minimal sandbox that sets zero nfiles, nprocs and filesize rlimits */
44 ssh_sandbox_init(struct monitor *monitor)
46 struct ssh_sandbox *box;
49 * Strictly, we don't need to maintain any state here but we need
50 * to return non-NULL to satisfy the API.
52 debug3("%s: preparing rlimit sandbox", __func__);
53 box = xcalloc(1, sizeof(*box));
60 ssh_sandbox_child(struct ssh_sandbox *box)
62 struct rlimit rl_zero;
64 rl_zero.rlim_cur = rl_zero.rlim_max = 0;
66 #ifndef SANDBOX_SKIP_RLIMIT_FSIZE
67 if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1)
68 fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s",
69 __func__, strerror(errno));
71 #ifndef SANDBOX_SKIP_RLIMIT_NOFILE
72 if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1)
73 fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s",
74 __func__, strerror(errno));
76 #ifdef HAVE_RLIMIT_NPROC
77 if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1)
78 fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s",
79 __func__, strerror(errno));
84 ssh_sandbox_parent_finish(struct ssh_sandbox *box)
87 debug3("%s: finished", __func__);
91 ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)
93 box->child_pid = child_pid;
96 #endif /* SANDBOX_RLIMIT */