| /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. */ |
| |
| /* The general pattern of use here: |
| * 1) Construct a minijail with minijail_new() |
| * 2) Apply the desired restrictions to it |
| * 3) Enter it, which locks the current process inside it, or: |
| * 3) Run a process inside it |
| * 4) Destroy it. |
| */ |
| |
| #ifndef LIBMINIJAIL_H_ |
| #define LIBMINIJAIL_H_ |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| enum { |
| MINIJAIL_ERR_PRELOAD = 252, |
| MINIJAIL_ERR_JAIL = 253, |
| MINIJAIL_ERR_INIT = 254, |
| }; |
| |
| struct minijail; |
| |
| /* Allocates a new minijail with no restrictions. */ |
| struct minijail *minijail_new(void); |
| |
| /* These functions add restrictions to the minijail. They are not applied until |
| * minijail_enter() is called. See the documentation in minijail0.1 for |
| * explanations in detail of what the restrictions do. */ |
| void minijail_change_uid(struct minijail *j, uid_t uid); |
| void minijail_change_gid(struct minijail *j, gid_t gid); |
| /* 'user' should be kept valid until minijail_destroy() */ |
| int minijail_change_user(struct minijail *j, const char *user); |
| /* 'group' should be kept valid until minijail_destroy() */ |
| int minijail_change_group(struct minijail *j, const char *group); |
| void minijail_use_seccomp(struct minijail *j); |
| void minijail_use_caps(struct minijail *j, uint64_t capmask); |
| void minijail_namespace_vfs(struct minijail *j); |
| void minijail_namespace_pids(struct minijail *j); |
| void minijail_remount_readonly(struct minijail *j); |
| void minijail_inherit_usergroups(struct minijail *j); |
| void minijail_disable_ptrace(struct minijail *j); |
| |
| /* Lock this process into the given minijail. Note that this procedure cannot fail, |
| * since there is no way to undo privilege-dropping; therefore, if any part of |
| * the privilege-drop fails, minijail_enter() will abort the entire process. |
| * |
| * Some restrictions cannot be enabled this way (pid namespaces) and attempting |
| * to do so will cause an abort. |
| */ |
| void minijail_enter(const struct minijail *j); |
| |
| /* Run the specified command in the given minijail, execve(3)-style. This is |
| * required if minijail_namespace_pids() was used. */ |
| int minijail_run(struct minijail *j, const char *filename, char *const argv[]); |
| |
| /* Kill the specified minijail. The minijail must have been created with pid |
| * namespacing; if it was, all processes inside it are atomically killed. */ |
| int minijail_kill(struct minijail *j); |
| |
| /* Wait for all processed in the specified minijail to exit. Returns the exit |
| * status of the _first_ process spawned in the jail. */ |
| int minijail_wait(struct minijail *j); |
| |
| /* Frees the given minijail. It does not matter if the process is inside the minijail or |
| * not. */ |
| void minijail_destroy(struct minijail *j); |
| |
| #ifdef __cplusplus |
| }; /* extern "C" */ |
| #endif |
| |
| #endif /* !LIBMINIJAIL_H_ */ |