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
30namespace android {
31
32// Furnished in main.cpp. Caller must own and free returned value
33char* uidToName(uid_t uid);
34void prdebug(const char* fmt, ...) __printflike(1, 2);
35
36// Furnished in LogStatistics.cpp.
37size_t sizesTotal();
38// Caller must own and free returned value
39char* pidToName(pid_t pid);
40char* tidToName(pid_t tid);
41uid_t pidToUid(pid_t pid);
42pid_t tidToPid(pid_t tid);
43
44// Furnished in LogTags.cpp. Thread safe.
45const char* tagToName(uint32_t tag);
46void ReReadEventLogTags();
47
48// Furnished by LogKlog.cpp
49char* log_strntok_r(char* s, ssize_t& len, char*& saveptr, ssize_t& sublen);
50
51// needle should reference a string longer than 1 character
52static inline const char* strnstr(const char* s, ssize_t len,
53                                  const char* needle) {
54    if (len <= 0) return nullptr;
55
56    const char c = *needle++;
57    const size_t needleLen = strlen(needle);
58    do {
59        do {
60            if (len <= (ssize_t)needleLen) return nullptr;
61            --len;
62        } while (*s++ != c);
63    } while (fastcmp<memcmp>(s, needle, needleLen));
64    s--;
65    return s;
66}
67}
68
69// Furnished in LogCommand.cpp
70bool clientHasLogCredentials(uid_t uid, gid_t gid, pid_t pid);
71bool clientHasLogCredentials(SocketClient* cli);
72
73static inline bool worstUidEnabledForLogid(log_id_t id) {
74    return (id == LOG_ID_MAIN) || (id == LOG_ID_SYSTEM) ||
75           (id == LOG_ID_RADIO) || (id == LOG_ID_EVENTS);
76}
77
78#endif  // _LOGD_LOG_UTILS_H__
79