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/*
* 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_simple_perror_msg_and_die("fgetfilecon failed");
}
setfscreatecon_or_die(context);
freecon(context);
}
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