CommandListener.cpp revision 51a29c8dc445e4fb89860561933e54a231e6ffb4 
1/*
2 * Copyright (C) 2012-2014 The Android Open Source Project
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#include <arpa/inet.h>
18#include <dirent.h>
19#include <errno.h>
20#include <fcntl.h>
21#include <netinet/in.h>
22#include <string.h>
23#include <stdlib.h>
24#include <sys/socket.h>
25#include <sys/types.h>
26
27#include <private/android_filesystem_config.h>
28#include <sysutils/SocketClient.h>
29
30#include "CommandListener.h"
31#include "LogCommand.h"
32
33CommandListener::CommandListener(LogBuffer *buf, LogReader * /*reader*/,
34                                 LogListener * /*swl*/)
35        : FrameworkListener("logd")
36        , mBuf(*buf) {
37    // registerCmd(new ShutdownCmd(buf, writer, swl));
38    registerCmd(new ClearCmd(buf));
39    registerCmd(new GetBufSizeCmd(buf));
40    registerCmd(new GetBufSizeUsedCmd(buf));
41    registerCmd(new GetStatisticsCmd(buf));
42}
43
44CommandListener::ShutdownCmd::ShutdownCmd(LogBuffer *buf, LogReader *reader,
45                                          LogListener *swl)
46        : LogCommand("shutdown")
47        , mBuf(*buf)
48        , mReader(*reader)
49        , mSwl(*swl)
50{ }
51
52int CommandListener::ShutdownCmd::runCommand(SocketClient * /*cli*/,
53                                             int /*argc*/,
54                                             char ** /*argv*/) {
55    mSwl.stopListener();
56    mReader.stopListener();
57    exit(0);
58}
59
60CommandListener::ClearCmd::ClearCmd(LogBuffer *buf)
61        : LogCommand("clear")
62        , mBuf(*buf)
63{ }
64
65int CommandListener::ClearCmd::runCommand(SocketClient *cli,
66                                         int argc, char **argv) {
67    if (!clientHasLogCredentials(cli)) {
68        cli->sendMsg("Permission Denied");
69        return 0;
70    }
71
72    if (argc < 2) {
73        cli->sendMsg("Missing Argument");
74        return 0;
75    }
76
77    int id = atoi(argv[1]);
78    if ((id < LOG_ID_MIN) || (LOG_ID_MAX <= id)) {
79        cli->sendMsg("Range Error");
80        return 0;
81    }
82
83    mBuf.clear((log_id_t) id);
84    cli->sendMsg("success");
85    return 0;
86}
87
88CommandListener::GetBufSizeCmd::GetBufSizeCmd(LogBuffer *buf)
89        : LogCommand("getLogSize")
90        , mBuf(*buf)
91{ }
92
93int CommandListener::GetBufSizeCmd::runCommand(SocketClient *cli,
94                                         int argc, char **argv) {
95    if (argc < 2) {
96        cli->sendMsg("Missing Argument");
97        return 0;
98    }
99
100    int id = atoi(argv[1]);
101    if ((id < LOG_ID_MIN) || (LOG_ID_MAX <= id)) {
102        cli->sendMsg("Range Error");
103        return 0;
104    }
105
106    unsigned long size = mBuf.getSize((log_id_t) id);
107    char buf[512];
108    snprintf(buf, sizeof(buf), "%lu", size);
109    cli->sendMsg(buf);
110    return 0;
111}
112
113CommandListener::GetBufSizeUsedCmd::GetBufSizeUsedCmd(LogBuffer *buf)
114        : LogCommand("getLogSizeUsed")
115        , mBuf(*buf)
116{ }
117
118int CommandListener::GetBufSizeUsedCmd::runCommand(SocketClient *cli,
119                                         int argc, char **argv) {
120    if (argc < 2) {
121        cli->sendMsg("Missing Argument");
122        return 0;
123    }
124
125    int id = atoi(argv[1]);
126    if ((id < LOG_ID_MIN) || (LOG_ID_MAX <= id)) {
127        cli->sendMsg("Range Error");
128        return 0;
129    }
130
131    unsigned long size = mBuf.getSizeUsed((log_id_t) id);
132    char buf[512];
133    snprintf(buf, sizeof(buf), "%lu", size);
134    cli->sendMsg(buf);
135    return 0;
136}
137
138CommandListener::GetStatisticsCmd::GetStatisticsCmd(LogBuffer *buf)
139        : LogCommand("getStatistics")
140        , mBuf(*buf)
141{ }
142
143int CommandListener::GetStatisticsCmd::runCommand(SocketClient *cli,
144                                         int argc, char **argv) {
145    uid_t uid = cli->getUid();
146    gid_t gid = cli->getGid();
147    if (clientHasLogCredentials(cli)) {
148        uid = AID_ROOT;
149    }
150
151    unsigned int logMask = -1;
152    if (argc > 1) {
153        logMask = 0;
154        for (int i = 1; i < argc; ++i) {
155            int id = atoi(argv[i]);
156            if ((id < LOG_ID_MIN) || (LOG_ID_MAX <= id)) {
157                cli->sendMsg("Range Error");
158                return 0;
159            }
160            logMask |= 1 << id;
161        }
162    }
163
164    char *buf = NULL;
165
166    mBuf.formatStatistics(&buf, uid, logMask);
167    if (!buf) {
168        cli->sendMsg("Failed");
169    } else {
170        cli->sendMsg(buf);
171        free(buf);
172    }
173    return 0;
174}
175