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 int nrpermissions = 0;
38 static struct permission *permissions = NULL;
39 static 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, ((nrpermissions + 8) & ~7) * sizeof(*p));
66 p = permissions + nrpermissions;
67 memset(p, 0, sizeof(*p));
68 p->name = strdup(name);
76 /* remove any granting */
77 void reset_permissions()
80 for (i = 0 ; i < nrpermissions ; i++)
81 permissions[i].granted = 0;
84 /* remove any granting */
85 void crop_permissions(unsigned level)
88 for (i = 0 ; i < nrpermissions ; i++)
89 if (permissions[i].level < level)
90 permissions[i].granted = 0;
93 /* add permissions granted for installation */
94 void grant_permission_list(const char *list)
99 static const char separators[] = " \t\n\r,";
101 iter = strdupa(list);
102 iter += strspn(iter, separators);
104 n = strcspn(iter, separators);
107 p = add_permission(iter);
109 ERROR("Can't allocate permission");
115 iter += strspn(iter, separators);
119 /* checks if the permission 'name' is recorded */
120 int permission_exists(const char *name)
122 return !!get_permission(name);
125 /* request the permission, returns 1 if granted or 0 otherwise */
126 int request_permission(const char *name)
128 struct permission *p = get_permission(name);
137 /* iteration over granted and requested permissions */
138 const char *first_usable_permission()
141 return next_usable_permission();
144 const char *next_usable_permission()
146 while(indexiter < nrpermissions) {
147 struct permission *p = &permissions[indexiter++];
148 if (p->granted && p->requested)