2 Copyright 2015, 2016 IoT.bzh
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 unsigned int nrpermissions = 0;
36 static struct permission *permissions = NULL;
37 static unsigned int indexiter = 0;
39 /* retrieves the permission of name */
40 static struct permission *get_permission(const char *name)
44 for (i = 0 ; i < nrpermissions ; i++)
45 if (0 == strcmp(permissions[i].name, name))
50 /* add a permission of name */
51 static struct permission *add_permission(const char *name)
53 struct permission *p = get_permission(name);
55 p = realloc(permissions,
56 ((nrpermissions + 8) & ~(unsigned)7) * sizeof(*p));
59 p = permissions + nrpermissions;
60 memset(p, 0, sizeof(*p));
61 p->name = strdup(name);
71 /* remove any granting */
72 void reset_permissions()
75 for (i = 0 ; i < nrpermissions ; i++)
76 permissions[i].granted = permissions[i].requested = 0;
79 /* remove any requested permission */
80 void reset_requested_permissions()
83 for (i = 0 ; i < nrpermissions ; i++)
84 permissions[i].requested = 0;
87 /* remove any granting */
88 void crop_permissions(unsigned level)
91 for (i = 0 ; i < nrpermissions ; i++)
92 if (permissions[i].level < level)
93 permissions[i].granted = 0;
96 /* add permissions granted for installation */
97 int grant_permission_list(const char *list)
102 static const char separators[] = " \t\n\r,";
104 iter = strdupa(list);
105 iter += strspn(iter, separators);
107 n = (unsigned)strcspn(iter, separators);
110 p = add_permission(iter);
118 iter += strspn(iter, separators);
123 /* checks if the permission 'name' is recorded */
124 int permission_exists(const char *name)
126 return !!get_permission(name);
129 /* request the permission, returns 1 if granted or 0 otherwise */
130 int request_permission(const char *name)
132 struct permission *p = get_permission(name);
141 /* iteration over granted and requested permissions */
142 const char *first_usable_permission()
145 return next_usable_permission();
148 const char *next_usable_permission()
150 while(indexiter < nrpermissions) {
151 struct permission *p = &permissions[indexiter++];
152 if (p->granted && p->requested)