13617ab6dda025fdde6e6d14acad989ec54a54ff
[platform/core/appfw/pkgmgr-server.git] / src / queue.c
1 /*
2  * Copyright (c) 2016 Samsung Electronics Co., Ltd. All rights reserved.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17
18 #define _XOPEN_SOURCE 500
19 #include <ftw.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <strings.h>
24 #include <unistd.h>
25 #include <sys/stat.h>
26 #include <sys/types.h>
27
28 #include <glib.h>
29
30 #include "pkgmgr-server.h"
31 #include "queue.h"
32
33 #define BACKEND_DIR "/etc/package-manager/backend"
34 #define NOPENFD 20
35
36 struct backend_queue {
37         char *path;
38         char *type;
39         int slot;
40         GList *job_list;
41 };
42
43 static GHashTable *queue_type_table;
44 static GHashTable *queue_slot_table;
45
46 int num_of_backends;
47
48 int _is_queue_empty(int pos)
49 {
50         struct backend_queue *queue;
51
52         queue = (struct backend_queue *)g_hash_table_lookup(queue_slot_table,
53                         (gconstpointer)pos);
54         if (queue == NULL) {
55                 ERR("cannot find queue of slot %d", pos);
56                 return -1;
57         }
58
59         if (queue->job_list == NULL)
60                 return 1;
61
62         return 0;
63 }
64
65 struct backend_job *_pop_queue(int pos)
66 {
67         struct backend_queue *queue;
68         struct backend_job *job;
69         GList *tmp;
70
71         queue = (struct backend_queue *)g_hash_table_lookup(queue_slot_table,
72                         (gconstpointer)pos);
73         if (queue == NULL) {
74                 ERR("cannot find queue of slot %d", pos);
75                 return NULL;
76         }
77
78         tmp = g_list_first(queue->job_list);
79         if (tmp == NULL)
80                 return NULL;
81         job = (struct backend_job *)tmp->data;
82         queue->job_list = g_list_delete_link(queue->job_list, tmp);
83
84         return job;
85 }
86
87 int _push_queue(uid_t target_uid, uid_t caller_uid, const char *req_id,
88                 int req_type, const char *queue_type, const char *pkgid,
89                 const char *args)
90 {
91         struct backend_queue *queue;
92         struct backend_job *job;
93
94         queue = (struct backend_queue *)g_hash_table_lookup(queue_type_table,
95                         (gconstpointer)queue_type);
96         if (queue == NULL) {
97                 ERR("no such queue: %s", queue_type);
98                 return -1;
99         }
100
101         job = calloc(1, sizeof(struct backend_job));
102         job->target_uid = target_uid;
103         job->caller_uid = caller_uid;
104         if (req_id)
105                 job->req_id = strdup(req_id);
106         job->req_type = req_type;
107         if (pkgid)
108                 job->pkgid = strdup(pkgid);
109         if (args)
110                 job->args = strdup(args);
111         /* just assign pointer value */
112         job->backend_slot = queue->slot;
113         job->backend_type = queue->type;
114         job->backend_path = queue->path;
115
116         queue->job_list = g_list_append(queue->job_list, (gpointer)job);
117
118         return 0;
119 }
120
121 static int __init_backends(const char *fpath, const struct stat *sb,
122                 int typeflag, struct FTW *ftwbuf)
123 {
124         int r;
125         struct backend_queue *queue;
126
127         if (typeflag != FTW_F && typeflag != FTW_SL)
128                 return 0;
129
130         queue = calloc(1, sizeof(struct backend_queue));
131         if (typeflag == FTW_F) {
132                 queue->path = strdup(fpath);
133         } else if (typeflag == FTW_SL) {
134                 queue->path = malloc(sb->st_size + 1);
135                 r = readlink(fpath, queue->path, sb->st_size + 1);
136                 if (r < 0 || r > sb->st_size) {
137                         ERR("failed to readlink for %s", fpath);
138                         free(queue->path);
139                         free(queue);
140                         return -1;
141                 }
142                 queue->path[r] = '\0';
143         }
144         queue->type = strdup(fpath + ftwbuf->base);
145         queue->slot = num_of_backends++;
146         g_hash_table_insert(queue_type_table, (gpointer)queue->type,
147                         (gpointer)queue);
148         g_hash_table_insert(queue_slot_table, (gpointer)queue->slot,
149                         (gpointer)queue);
150
151         DBG("backend detected: %s(%s)", queue->type, queue->path);
152
153         return 0;
154 }
155
156 static gboolean __str_equal(gconstpointer v1, gconstpointer v2)
157 {
158         const char *str1 = (const char *)v1;
159         const char *str2 = (const char *)v2;
160
161         /* ignore case */
162         return strcasecmp(str1, str2) == 0;
163 }
164
165 void __free_extra_info(struct backend_job *job)
166 {
167         if (job->extra) {
168                 if (job->extra->getsize_io)
169                         g_io_channel_unref(job->extra->getsize_io);
170                 if (job->extra->getsize_fd)
171                         close(job->extra->getsize_fd);
172                 if (job->extra->getsize_fifo) {
173                         unlink(job->extra->getsize_fifo);
174                         free(job->extra->getsize_fifo);
175                 }
176                 free(job->extra);
177                 job->extra = NULL;
178         }
179 }
180
181 void _free_backend_job(struct backend_job *job)
182 {
183         __free_extra_info(job);
184         free(job->req_id);
185         free(job->pkgid);
186         free(job->appid);
187         free(job->args);
188         free(job);
189 }
190
191 static void __free_backend_queue(gpointer data)
192 {
193         struct backend_queue *queue = (struct backend_queue *)data;
194
195         g_list_free_full(queue->job_list, (GDestroyNotify)_free_backend_job);
196         free(queue->path);
197         free(queue->type);
198         free(queue);
199 }
200
201 void _fini_backend_queue(void)
202 {
203         g_hash_table_destroy(queue_slot_table);
204         g_hash_table_destroy(queue_type_table);
205 }
206
207 int _init_backend_queue(void)
208 {
209         queue_type_table = g_hash_table_new_full(g_str_hash, __str_equal,
210                         NULL, __free_backend_queue);
211         queue_slot_table = g_hash_table_new(g_direct_hash, g_direct_equal);
212
213         if (nftw(BACKEND_DIR, __init_backends, NOPENFD, FTW_PHYS))
214                 return -1;
215
216         DBG("number of backends: %d", num_of_backends);
217
218         return 0;
219 }