scoutos / prex-0.9.0 / usr / server / exec / exec_cap.c @ 03e9c04a
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/*-
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* Copyright (c) 2008, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* exec_cap.c - file capability management routines.
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*/
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#include <sys/prex.h> |
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#include <sys/capability.h> |
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#include <string.h> |
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#include <errno.h> |
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#include "exec.h" |
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/*
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* Bind capabilities for the known file.
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*/
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void
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bind_cap(char *path, task_t task)
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{ |
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const struct cap_map *map; |
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cap_t cap = 0;
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int error;
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/*
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* Set capabilities to the known applications.
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*/
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map = &cap_table[0];
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while (map->c_path != NULL) { |
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if (!strncmp(path, map->c_path, PATH_MAX)) {
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cap = map->c_capset; |
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break;
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} |
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map++; |
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} |
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if (cap != 0) { |
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DPRINTF(("exec: set capability:%08x to %s\n", cap, path));
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error = task_setcap(task, cap); |
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if (error)
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sys_panic("exec: no SETPCAP capability");
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} |
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} |
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/*
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* Bind capability for server
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*/
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int
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exec_bindcap(struct bind_msg *msg)
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{ |
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task_t task; |
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int error;
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task = msg->hdr.task; |
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if (msg->path == NULL) |
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return EFAULT;
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/*
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* Check capability of caller task.
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*/
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error = task_chkcap(task, CAP_PROTSERV); |
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if (error != 0) |
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return EPERM;
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/*
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* Set capability
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*/
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bind_cap(msg->path, task); |
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return 0; |
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} |