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/*
* Copyright © 2016 Canonical Limited
*
* This library 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, see <http://www.gnu.org/licenses/>.
*
* Author: Allison Lortie <desrt@desrt.ca>
*/
#include "permissions.h"
static gboolean
permission_list_add (PermissionList *self,
const gchar *string)
{
gsize ref_count;
ref_count = (gsize) g_hash_table_lookup (self->hash_table, string);
ref_count++;
g_hash_table_insert (self->hash_table, g_strdup (string), (gpointer) ref_count);
return ref_count == 1;
}
static gboolean
permission_list_remove (PermissionList *self,
const gchar *string)
{
gsize ref_count;
ref_count = (gsize) g_hash_table_lookup (self->hash_table, string);
g_assert (ref_count != 0);
ref_count--;
if (ref_count > 0)
g_hash_table_insert (self->hash_table, g_strdup (string), (gpointer) ref_count);
else
g_hash_table_remove (self->hash_table, string);
return ref_count == 0;
}
gboolean
permission_list_merge (PermissionList *self,
PermissionList *to_merge)
{
gboolean any_changes = FALSE;
GHashTableIter iter;
gpointer key;
g_hash_table_iter_init (&iter, to_merge->hash_table);
while (g_hash_table_iter_next (&iter, &key, NULL))
any_changes |= permission_list_add (self, key);
return any_changes;
}
gboolean
permission_list_unmerge (PermissionList *self,
PermissionList *to_unmerge)
{
gboolean any_changes = FALSE;
GHashTableIter iter;
gpointer key;
g_hash_table_iter_init (&iter, to_unmerge->hash_table);
while (g_hash_table_iter_next (&iter, &key, NULL))
any_changes |= permission_list_remove (self, key);
return any_changes;
}
static gboolean
path_contains (const gchar *a,
const gchar *b)
{
gint i;
for (i = 0; b[i]; i++)
if (a[i] != b[i])
{
if (a[i] == '/')
return TRUE;
return FALSE;
}
return a[i] == '\0';
}
gboolean
permission_list_contains (PermissionList *self,
const gchar *path)
{
GHashTableIter iter;
gpointer key;
g_hash_table_iter_init (&iter, self->hash_table);
while (g_hash_table_iter_next (&iter, &key, NULL))
if (path_contains (key, path))
return TRUE;
return FALSE;
}
const gchar **
permission_list_get_strv (PermissionList *self)
{
return (const gchar **) g_hash_table_get_keys_as_array (self->hash_table, NULL);
}
void
permission_list_init (PermissionList *self,
gchar **contents)
{
self->hash_table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
if (contents != NULL)
{
gint i;
for (i = 0; contents[i]; i++)
g_hash_table_insert (self->hash_table, contents[i], (gpointer) 1u);
g_free (contents);
}
}
void
permission_list_clear (PermissionList *self)
{
g_clear_pointer (&self->hash_table, g_hash_table_unref);
}
void
permissions_init (Permissions *permissions)
{
permission_list_init (&permissions->readable, NULL);
permission_list_init (&permissions->writable, NULL);
}
void
permissions_clear (Permissions *self)
{
g_clear_pointer (&self->app_id, g_free);
g_clear_pointer (&self->ipc_dir, g_free);
permission_list_clear (&self->readable);
permission_list_clear (&self->writable);
}
static void
merge_string (gchar **dest,
const gchar *src)
{
if (*dest == NULL)
*dest = g_strdup (src);
g_assert_cmpstr (*dest, ==, src);
}
gboolean
permissions_merge (Permissions *permissions,
Permissions *to_merge)
{
merge_string (&permissions->app_id, to_merge->app_id);
merge_string (&permissions->ipc_dir, to_merge->ipc_dir);
return permission_list_merge (&permissions->readable, &to_merge->readable) |
permission_list_merge (&permissions->writable, &to_merge->writable);
}
gboolean
permissions_unmerge (Permissions *permissions,
Permissions *to_unmerge)
{
return permission_list_unmerge (&permissions->readable, &to_unmerge->readable) |
permission_list_unmerge (&permissions->writable, &to_unmerge->writable);
}
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