1 /*
2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "klog.h"
17
18 #include <cerrno>
19 #include <cstdarg>
20 #include <cstdio>
21 #include <cstdlib>
22 #include <cstring>
23 #include <ctime>
24
25 #include <fcntl.h>
26 #include <pthread.h>
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <sys/wait.h>
30 #include <unistd.h>
31
32 #include "hilog/log.h"
33 #include "securec.h"
34
35 namespace OHOS {
36 namespace MMI {
37 #define UNUSED(x) \
38 do { \
39 (void)(x) \
40 } while (0)
41
42 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
43
44 static int g_fd = -1;
45
46 constexpr int32_t MAX_LOG_SIZE = 1024;
47
KLogOpenLogDevice(void)48 void KLogOpenLogDevice(void)
49 {
50 #ifdef _CLOEXEC_
51 int fd = open("/dev/kmsg", O_WRONLY | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IRGRP);
52 #else
53 int fd = open("/dev/kmsg", O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IRGRP);
54 #endif
55 if (fd >= 0) {
56 g_fd = fd;
57 }
58 return;
59 }
60
kMsgLog(const char * fileName,int line,const char * kLevel,const char * fmt,...)61 void kMsgLog(const char* fileName, int line, const char* kLevel,
62 const char* fmt, ...)
63 {
64 if (UNLIKELY(g_fd < 0)) {
65 KLogOpenLogDevice();
66 if (g_fd < 0) {
67 return;
68 }
69 }
70 va_list vargs;
71 va_start(vargs, fmt);
72 char tmpFmt[MAX_LOG_SIZE];
73 if (vsnprintf_s(tmpFmt, MAX_LOG_SIZE, MAX_LOG_SIZE - 1, fmt, vargs) == -1) {
74 va_end(vargs);
75 close(g_fd);
76 g_fd = -1;
77 return;
78 }
79
80 char logInfo[MAX_LOG_SIZE];
81 if (snprintf_s(logInfo, MAX_LOG_SIZE, MAX_LOG_SIZE - 1,
82 "%s[dm=%08X][pid=%d][%s:%d][%s][%s] %s",
83 kLevel, 0x0D002800, getpid(), fileName, line, "klog", "info", tmpFmt) == -1) {
84 va_end(vargs);
85 close(g_fd);
86 g_fd = -1;
87 return;
88 }
89 va_end(vargs);
90
91 if (write(g_fd, logInfo, strlen(logInfo)) < 0) {
92 close(g_fd);
93 g_fd = -1;
94 }
95 return;
96 }
97 } // namespace MMI
98 } // namespace OHOS
99