source: MondoRescue/branches/3.2/mindi-busybox/libbb/selinux_common.c@ 3232

/*
 * libbb/selinux_common.c
 *   -- common SELinux utility functions
 *
 * Copyright 2007 KaiGai Kohei <kaigai@kaigai.gr.jp>
 *
 * Licensed under GPLv2, see file LICENSE in this source tree.
 */
#include "libbb.h"
#include <selinux/context.h>

context_t FAST_FUNC set_security_context_component(security_context_t cur_context,
            char *user, char *role, char *type, char *range)
{
    context_t con = context_new(cur_context);
    if (!con)
        return NULL;

    if (user && context_user_set(con, user))
        goto error;
    if (type && context_type_set(con, type))
        goto error;
    if (range && context_range_set(con, range))
        goto error;
    if (role && context_role_set(con, role))
        goto error;
    return con;

error:
    context_free(con);
    return NULL;
}

void FAST_FUNC setfscreatecon_or_die(security_context_t scontext)
{
    if (setfscreatecon(scontext) < 0) {
        /* Can be NULL. All known printf implementations
         * display "(null)", "<null>" etc */
        bb_perror_msg_and_die("can't set default "
                "file creation context to %s", scontext);
    }
}

void FAST_FUNC selinux_preserve_fcontext(int fdesc)
{
    security_context_t context;

    if (fgetfilecon(fdesc, &context) < 0) {
        if (errno == ENODATA || errno == ENOTSUP)
            return;
        bb_perror_msg_and_die("fgetfilecon failed");
    }
    setfscreatecon_or_die(context);
    freecon(context);
}