shadow/lib/selinux.c
nekral-guest 2c24c012bd * lib/prototypes.h, lib/Makefile.am, po/POTFILES.in,
libmisc/copydir.c, lib/selinux.c: Move set_selinux_file_context()
	and reset_selinux_file_context() from libmisc/copydir.c to
	lib/selinux.c.
	* lib/commonio.c: Use set_selinux_file_context() and
	reset_selinux_file_context() instead of using the existing
	database SELinux context to set the context for the newly created
	files.
2011-12-09 22:13:02 +00:00

103 lines
3.2 KiB
C

/*
* Copyright (c) 2011 , Peter Vrabec <pvrabec@redhat.com>
* 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. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDERS 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.
*/
#include <config.h>
#ifdef WITH_SELINUX
#include "defines.h"
#include <selinux/selinux.h>
static bool selinux_checked = false;
static bool selinux_enabled;
/*
* set_selinux_file_context - Set the security context before any file or
* directory creation.
*
* set_selinux_file_context () should be called before any creation
* of file, symlink, directory, ...
*
* Callers may have to Reset SELinux to create files with default
* contexts with reset_selinux_file_context
*/
int set_selinux_file_context (const char *dst_name)
{
/*@null@*/security_context_t scontext = NULL;
if (!selinux_checked) {
selinux_enabled = is_selinux_enabled () > 0;
selinux_checked = true;
}
if (selinux_enabled) {
/* Get the default security context for this file */
if (matchpathcon (dst_name, 0, &scontext) < 0) {
if (security_getenforce () != 0) {
return 1;
}
}
/* Set the security context for the next created file */
if (setfscreatecon (scontext) < 0) {
if (security_getenforce () != 0) {
return 1;
}
}
freecon (scontext);
}
return 0;
}
/*
* reset_selinux_file_context - Reset the security context to the default
* policy behavior
*
* reset_selinux_file_context () should be called after the context
* was changed with set_selinux_file_context ()
*/
int reset_selinux_file_context (void)
{
if (!selinux_checked) {
selinux_enabled = is_selinux_enabled () > 0;
selinux_checked = true;
}
if (selinux_enabled) {
if (setfscreatecon (NULL) != 0) {
return 1;
}
}
return 0;
}
#else /* !WITH_SELINUX */
extern int errno; /* warning: ANSI C forbids an empty source file */
#endif /* !WITH_SELINUX */