1 /*
2 * Copyright (C) 2012-2015 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 #ifndef _LOGD_LOG_UTILS_H__
18 #define _LOGD_LOG_UTILS_H__
19
20 #include <sys/cdefs.h>
21 #include <sys/types.h>
22
23 #include <private/android_logger.h>
24 #include <sysutils/SocketClient.h>
25 #include <utils/FastStrcmp.h>
26
27 // Hijack this header as a common include file used by most all sources
28 // to report some utilities defined here and there.
29
30 namespace android {
31
32 // Furnished in main.cpp. Caller must own and free returned value
33 char* uidToName(uid_t uid);
34 void prdebug(const char* fmt, ...) __printflike(1, 2);
35
36 // Furnished in LogStatistics.cpp.
37 size_t sizesTotal();
38 // Caller must own and free returned value
39 char* pidToName(pid_t pid);
40 char* tidToName(pid_t tid);
41
42 // Furnished in LogTags.cpp. Thread safe.
43 const char* tagToName(uint32_t tag);
44 void ReReadEventLogTags();
45
46 // Furnished by LogKlog.cpp
47 char* log_strntok_r(char* s, ssize_t& len, char*& saveptr, ssize_t& sublen);
48
49 // needle should reference a string longer than 1 character
strnstr(const char * s,ssize_t len,const char * needle)50 static inline const char* strnstr(const char* s, ssize_t len,
51 const char* needle) {
52 if (len <= 0) return nullptr;
53
54 const char c = *needle++;
55 const size_t needleLen = strlen(needle);
56 do {
57 do {
58 if (len <= (ssize_t)needleLen) return nullptr;
59 --len;
60 } while (*s++ != c);
61 } while (fastcmp<memcmp>(s, needle, needleLen));
62 s--;
63 return s;
64 }
65 }
66
67 // Furnished in LogCommand.cpp
68 bool clientHasLogCredentials(uid_t uid, gid_t gid, pid_t pid);
69 bool clientHasLogCredentials(SocketClient* cli);
70
worstUidEnabledForLogid(log_id_t id)71 static inline bool worstUidEnabledForLogid(log_id_t id) {
72 return (id == LOG_ID_MAIN) || (id == LOG_ID_SYSTEM) ||
73 (id == LOG_ID_RADIO) || (id == LOG_ID_EVENTS);
74 }
75
76 #endif // _LOGD_LOG_UTILS_H__
77