68b04765f1b76db3a20d67f234510da2540f09ac
[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         struct backend_queue *queue;
125
126         if (typeflag != FTW_F && typeflag != FTW_SL)
127                 return 0;
128
129         queue = calloc(1, sizeof(struct backend_queue));
130         if (typeflag == FTW_F) {
131                 queue->path = strdup(fpath);
132         } else if (typeflag == FTW_SL) {
133                 queue->path = malloc(sb->st_size + 1);
134                 if (readlink(fpath, queue->path, sb->st_size + 1) < 0) {
135                         ERR("failed to readlink for %s", fpath);
136                         free(queue->path);
137                         free(queue);
138                         return -1;
139                 }
140         }
141         queue->type = strdup(fpath + ftwbuf->base);
142         queue->slot = num_of_backends++;
143         g_hash_table_insert(queue_type_table, (gpointer)queue->type,
144                         (gpointer)queue);
145         g_hash_table_insert(queue_slot_table, (gpointer)queue->slot,
146                         (gpointer)queue);
147
148         DBG("backend detected: %s(%s)", queue->type, queue->path);
149
150         return 0;
151 }
152
153 static gboolean __str_equal(gconstpointer v1, gconstpointer v2)
154 {
155         const char *str1 = (const char *)v1;
156         const char *str2 = (const char *)v2;
157
158         /* ignore case */
159         return strcasecmp(str1, str2) == 0;
160 }
161
162 void __free_extra_info(struct backend_job *job)
163 {
164         if (job->extra) {
165                 if (job->extra->getsize_io)
166                         g_io_channel_unref(job->extra->getsize_io);
167                 if (job->extra->getsize_fd)
168                         close(job->extra->getsize_fd);
169                 if (job->extra->getsize_fifo) {
170                         unlink(job->extra->getsize_fifo);
171                         free(job->extra->getsize_fifo);
172                 }
173                 free(job->extra);
174                 job->extra = NULL;
175         }
176 }
177
178 void _free_backend_job(struct backend_job *job)
179 {
180         __free_extra_info(job);
181         free(job->req_id);
182         free(job->pkgid);
183         free(job->appid);
184         free(job->args);
185         free(job);
186 }
187
188 static void __free_backend_queue(gpointer data)
189 {
190         struct backend_queue *queue = (struct backend_queue *)data;
191
192         g_list_free_full(queue->job_list, (GDestroyNotify)_free_backend_job);
193         free(queue->path);
194         free(queue->type);
195         free(queue);
196 }
197
198 void _fini_backend_queue(void)
199 {
200         g_hash_table_destroy(queue_slot_table);
201         g_hash_table_destroy(queue_type_table);
202 }
203
204 int _init_backend_queue(void)
205 {
206         queue_type_table = g_hash_table_new_full(g_str_hash, __str_equal,
207                         NULL, __free_backend_queue);
208         queue_slot_table = g_hash_table_new(g_direct_hash, g_direct_equal);
209
210         if (nftw(BACKEND_DIR, __init_backends, NOPENFD, FTW_PHYS))
211                 return -1;
212
213         DBG("number of backends: %d", num_of_backends);
214
215         return 0;
216 }