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/*-

 * Copyright (c) 2008, Kohsuke Ohtani

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/*

 * exec_cap.c - file capability management routines.

 */

#include <sys/prex.h>

#include <sys/capability.h>

#include <string.h>

#include <errno.h>

#include "exec.h"

/*

 * Bind capabilities for the known file.

 */

void

bind_cap(char *path, task_t task)

{

        const struct cap_map *map;

        cap_t cap = 0;

        int error;

        /*

         * Set capabilities to the known applications.

         */

        map = &cap_table[0];

        while (map->c_path != NULL) {

                if (!strncmp(path, map->c_path, PATH_MAX)) {

                        cap = map->c_capset;

                        break;

                }

                map++;

        }

        if (cap != 0) {

                DPRINTF(("exec: set capability:%08x to %s\n", cap, path));

                error = task_setcap(task, cap);

                if (error)

                        sys_panic("exec: no SETPCAP capability");

        }

}

/*

 * Bind capability for server

 */

int

exec_bindcap(struct bind_msg *msg)

{

        task_t task;

        int error;

        task = msg->hdr.task;

        if (msg->path == NULL)

                return EFAULT;

        /*

         * Check capability of caller task.

         */

        error = task_chkcap(task, CAP_PROTSERV);

        if (error != 0)

                return EPERM;

        /*

         * Set capability

         */

        bind_cap(msg->path, task);

        return 0;

}