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69 lines
1.8 KiB
69 lines
1.8 KiB
/* |
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* Copyright (C) 2008 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <unistd.h> |
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#include <cutils/android_get_control_file.h> |
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#include <cutils/klog.h> |
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static int klog_level = KLOG_INFO_LEVEL; |
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void klog_set_level(int level) { |
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klog_level = level; |
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} |
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static int __open_klog(void) { |
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static const char kmsg_device[] = "/dev/kmsg"; |
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int ret = android_get_control_file(kmsg_device); |
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if (ret >= 0) return ret; |
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return TEMP_FAILURE_RETRY(open(kmsg_device, O_WRONLY | O_CLOEXEC)); |
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} |
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#define LOG_BUF_MAX 512 |
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void klog_writev(int level, const struct iovec* iov, int iov_count) { |
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if (level > klog_level) return; |
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static int klog_fd = __open_klog(); |
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if (klog_fd == -1) return; |
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TEMP_FAILURE_RETRY(writev(klog_fd, iov, iov_count)); |
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} |
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void klog_write(int level, const char* fmt, ...) { |
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if (level > klog_level) return; |
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char buf[LOG_BUF_MAX]; |
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va_list ap; |
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va_start(ap, fmt); |
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vsnprintf(buf, sizeof(buf), fmt, ap); |
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va_end(ap); |
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buf[LOG_BUF_MAX - 1] = 0; |
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struct iovec iov[1]; |
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iov[0].iov_base = buf; |
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iov[0].iov_len = strlen(buf); |
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klog_writev(level, iov, 1); |
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}
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