4 author: José Bollo <jose.bollo@iot.bzh>
6 Licensed under the Apache License, Version 2.0 (the "License");
7 you may not use this file except in compliance with the License.
8 You may obtain a copy of the License at
10 http://www.apache.org/licenses/LICENSE-2.0
12 Unless required by applicable law or agreed to in writing, software
13 distributed under the License is distributed on an "AS IS" BASIS,
14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 See the License for the specific language governing permissions and
16 limitations under the License.
26 #include "wgtpkg-permissions.h"
31 unsigned requested: 1;
35 static const char prefix_of_permissions[] = FWK_PREFIX_PERMISSION;
37 static unsigned int nrpermissions = 0;
38 static struct permission *permissions = NULL;
39 static unsigned int indexiter = 0;
41 /* check is the name has the correct prefix for permissions */
42 int is_standard_permission(const char *name)
44 return 0 == memcmp(name, prefix_of_permissions, sizeof(prefix_of_permissions) - 1);
47 /* retrieves the permission of name */
48 static struct permission *get_permission(const char *name)
52 for (i = 0 ; i < nrpermissions ; i++)
53 if (0 == strcmp(permissions[i].name, name))
58 /* add a permission of name */
59 static struct permission *add_permission(const char *name)
61 struct permission *p = get_permission(name);
63 p = realloc(permissions,
64 ((nrpermissions + 8) & ~(unsigned)7) * sizeof(*p));
67 p = permissions + nrpermissions;
68 memset(p, 0, sizeof(*p));
69 p->name = strdup(name);
79 /* remove any granting */
80 void reset_permissions()
83 for (i = 0 ; i < nrpermissions ; i++)
84 permissions[i].granted = permissions[i].requested = 0;
87 /* remove any requested permission */
88 void reset_requested_permissions()
91 for (i = 0 ; i < nrpermissions ; i++)
92 permissions[i].requested = 0;
95 /* remove any granting */
96 void crop_permissions(unsigned level)
99 for (i = 0 ; i < nrpermissions ; i++)
100 if (permissions[i].level < level)
101 permissions[i].granted = 0;
104 /* add permissions granted for installation */
105 int grant_permission_list(const char *list)
107 struct permission *p;
110 static const char separators[] = " \t\n\r,";
112 iter = strdupa(list);
113 iter += strspn(iter, separators);
115 n = (unsigned)strcspn(iter, separators);
118 p = add_permission(iter);
126 iter += strspn(iter, separators);
131 /* checks if the permission 'name' is recorded */
132 int permission_exists(const char *name)
134 return !!get_permission(name);
137 /* request the permission, returns 1 if granted or 0 otherwise */
138 int request_permission(const char *name)
140 struct permission *p = get_permission(name);
149 /* iteration over granted and requested permissions */
150 const char *first_usable_permission()
153 return next_usable_permission();
156 const char *next_usable_permission()
158 while(indexiter < nrpermissions) {
159 struct permission *p = &permissions[indexiter++];
160 if (p->granted && p->requested)