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/*
* Copyright (C) 2014 Colin Walters <walters@verbum.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2 of the licence or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <glib-unix.h>
#include "ot-main.h"
#include "ot-admin-instutil-builtins.h"
#include "otutil.h"
static char *
ptrarray_path_join (GPtrArray *path)
{
GString *path_buf;
path_buf = g_string_new ("");
if (path->len == 0)
g_string_append_c (path_buf, '/');
else
{
guint i;
for (i = 0; i < path->len; i++)
{
const char *elt = path->pdata[i];
g_string_append_c (path_buf, '/');
g_string_append (path_buf, elt);
}
}
return g_string_free (path_buf, FALSE);
}
static gboolean
relabel_one_path (OstreeSePolicy *sepolicy,
GFile *path,
GFileInfo *info,
GPtrArray *path_parts,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
g_autofree char *relpath = NULL;
g_autofree char *new_label = NULL;
relpath = ptrarray_path_join (path_parts);
if (!ostree_sepolicy_restorecon (sepolicy, relpath,
info, path,
OSTREE_SEPOLICY_RESTORECON_FLAGS_ALLOW_NOLABEL |
OSTREE_SEPOLICY_RESTORECON_FLAGS_KEEP_EXISTING,
&new_label,
cancellable, error))
{
g_prefix_error (error, "Setting context of %s: ", gs_file_get_path_cached (path));
goto out;
}
if (new_label)
g_print ("Set label of '%s' (as '%s') to '%s'\n",
gs_file_get_path_cached (path),
relpath,
new_label);
ret = TRUE;
out:
return ret;
}
static gboolean
relabel_recursively (OstreeSePolicy *sepolicy,
GFile *dir,
GFileInfo *dir_info,
GPtrArray *path_parts,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
g_autoptr(GFileEnumerator) direnum = NULL;
if (!relabel_one_path (sepolicy, dir, dir_info, path_parts,
cancellable, error))
goto out;
direnum = g_file_enumerate_children (dir, OSTREE_GIO_FAST_QUERYINFO,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable, error);
if (!direnum)
goto out;
while (TRUE)
{
GFileInfo *file_info;
GFile *child;
GFileType ftype;
if (!g_file_enumerator_iterate (direnum, &file_info, &child,
cancellable, error))
goto out;
if (file_info == NULL)
break;
g_ptr_array_add (path_parts, (char*)g_file_info_get_name (file_info));
ftype = g_file_info_get_file_type (file_info);
if (ftype == G_FILE_TYPE_DIRECTORY)
{
if (!relabel_recursively (sepolicy, child, file_info, path_parts,
cancellable, error))
goto out;
}
else
{
if (!relabel_one_path (sepolicy, child, file_info, path_parts,
cancellable, error))
goto out;
}
g_ptr_array_remove_index (path_parts, path_parts->len - 1);
}
ret = TRUE;
out:
return ret;
}
static gboolean
selinux_relabel_dir (OstreeSePolicy *sepolicy,
GFile *dir,
const char *prefix,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
g_autoptr(GPtrArray) path_parts = g_ptr_array_new ();
g_autoptr(GFileInfo) root_info = NULL;
root_info = g_file_query_info (dir, OSTREE_GIO_FAST_QUERYINFO,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable, error);
if (!root_info)
goto out;
g_ptr_array_add (path_parts, (char*)prefix);
if (!relabel_recursively (sepolicy, dir, root_info, path_parts,
cancellable, error))
{
g_prefix_error (error, "Relabeling /%s: ", prefix);
goto out;
}
ret = TRUE;
out:
return ret;
}
static GOptionEntry options[] = {
{ NULL }
};
gboolean
ot_admin_instutil_builtin_selinux_ensure_labeled (int argc, char **argv, OstreeCommandInvocation *invocation, GCancellable *cancellable, GError **error)
{
gboolean ret = FALSE;
const char *policy_name;
g_autoptr(GFile) subpath = NULL;
const char *prefix = NULL;
g_autoptr(OstreeSePolicy) sepolicy = NULL;
g_autoptr(GPtrArray) deployments = NULL;
OstreeDeployment *first_deployment;
g_autoptr(GOptionContext) context = NULL;
g_autoptr(OstreeSysroot) sysroot = NULL;
g_autoptr(GFile) deployment_path = NULL;
context = g_option_context_new ("[SUBPATH PREFIX]");
if (!ostree_admin_option_context_parse (context, options, &argc, &argv,
OSTREE_ADMIN_BUILTIN_FLAG_SUPERUSER | OSTREE_ADMIN_BUILTIN_FLAG_UNLOCKED,
invocation, &sysroot, cancellable, error))
goto out;
deployments = ostree_sysroot_get_deployments (sysroot);
if (deployments->len == 0)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Unable to find a deployment in sysroot");
goto out;
}
first_deployment = deployments->pdata[0];
deployment_path = ostree_sysroot_get_deployment_directory (sysroot, first_deployment);
if (argc >= 2)
{
subpath = g_file_new_for_path (argv[1]);
prefix = argv[2];
}
else
{
subpath = g_object_ref (deployment_path);
prefix = "";
}
sepolicy = ostree_sepolicy_new (deployment_path, cancellable, error);
if (!sepolicy)
goto out;
policy_name = ostree_sepolicy_get_name (sepolicy);
if (policy_name)
{
g_print ("Relabeling using policy '%s'\n", policy_name);
if (!selinux_relabel_dir (sepolicy, subpath, prefix,
cancellable, error))
goto out;
}
else
g_print ("No SELinux policy found in deployment '%s'\n",
gs_file_get_path_cached (deployment_path));
ret = TRUE;
out:
return ret;
}
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