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 <cstdio>
19 #include <cstring>
20 #include <cstdlib>
21 #include <cstdarg>
22 #include <ctime>
23 #include <cerrno>
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
36 namespace OHOS {
37 namespace MMI {
38 #define UNUSED(x) \
39 do { \
40 (void)(x) \
41 } while (0)
42
43 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
44
45 static int g_fd_klog = -1;
46
47 constexpr int32_t MAX_LOG_SIZE = 1024;
48
KLogOpenLogDevice(void)49 void KLogOpenLogDevice(void)
50 {
51 #ifdef _CLOEXEC_
52 int fd = open("/dev/kmsg", O_WRONLY | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IRGRP);
53 #else
54 int fd = open("/dev/kmsg", O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IRGRP);
55 #endif
56 if (fd >= 0) {
57 g_fd_klog = fd;
58 }
59 return;
60 }
61
kMsgLog(const char * fileName,int line,const char * kLevel,const char * fmt,...)62 void kMsgLog(const char* fileName, int line, const char* kLevel,
63 const char* fmt, ...)
64 {
65 if (UNLIKELY(g_fd_klog < 0)) {
66 KLogOpenLogDevice();
67 if (g_fd_klog < 0) {
68 return;
69 }
70 }
71 va_list vargs;
72 va_start(vargs, fmt);
73 char tmpFmt[MAX_LOG_SIZE];
74 if (vsnprintf_s(tmpFmt, MAX_LOG_SIZE, MAX_LOG_SIZE - 1, fmt, vargs) == -1) {
75 va_end(vargs);
76 close(g_fd_klog);
77 g_fd_klog = -1;
78 return;
79 }
80
81 char logInfo[MAX_LOG_SIZE];
82 if (snprintf_s(logInfo, MAX_LOG_SIZE, MAX_LOG_SIZE - 1,
83 "%s[dm=%08X][pid=%d][%s:%d][%s][%s] %s",
84 kLevel, 0x0D002800, getpid(), fileName, line, "klog", "info", tmpFmt) == -1) {
85 va_end(vargs);
86 close(g_fd_klog);
87 g_fd_klog = -1;
88 return;
89 }
90 va_end(vargs);
91
92 if (write(g_fd_klog, logInfo, strlen(logInfo)) < 0) {
93 close(g_fd_klog);
94 g_fd_klog = -1;
95 }
96 return;
97 }
98 } // namespace MMI
99 } // namespace OHOS
100