82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* utils/logger.h
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**
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** Copyright 2007, The Android Open Source Project
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**
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** This file is dual licensed. It may be redistributed and/or modified
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** under the terms of the Apache 2.0 License OR version 2 of the GNU
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** General Public License.
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*/
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#ifndef _UTILS_LOGGER_H
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#define _UTILS_LOGGER_H
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#include <stdint.h>
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/*
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* The userspace structure for version 1 of the logger_entry ABI.
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* This structure is returned to userspace by the kernel logger
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* driver unless an upgrade to a newer ABI version is requested.
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*/
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struct logger_entry {
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uint16_t len; /* length of the payload */
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uint16_t __pad; /* no matter what, we get 2 bytes of padding */
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int32_t pid; /* generating process's pid */
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int32_t tid; /* generating process's tid */
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int32_t sec; /* seconds since Epoch */
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int32_t nsec; /* nanoseconds */
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char msg[0]; /* the entry's payload */
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};
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/*
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* The userspace structure for version 2 of the logger_entry ABI.
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* This structure is returned to userspace if ioctl(LOGGER_SET_VERSION)
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* is called with version==2
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*/
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struct logger_entry_v2 {
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uint16_t len; /* length of the payload */
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uint16_t hdr_size; /* sizeof(struct logger_entry_v2) */
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int32_t pid; /* generating process's pid */
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int32_t tid; /* generating process's tid */
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int32_t sec; /* seconds since Epoch */
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int32_t nsec; /* nanoseconds */
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uint32_t euid; /* effective UID of logger */
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char msg[0]; /* the entry's payload */
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};
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#define LOGGER_LOG_MAIN "log/main"
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#define LOGGER_LOG_RADIO "log/radio"
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#define LOGGER_LOG_EVENTS "log/events"
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#define LOGGER_LOG_SYSTEM "log/system"
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/*
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* The maximum size of the log entry payload that can be
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* written to the kernel logger driver. An attempt to write
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* more than this amount to /dev/log/* will result in a
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* truncated log entry.
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*/
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#define LOGGER_ENTRY_MAX_PAYLOAD 4076
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/*
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* The maximum size of a log entry which can be read from the
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* kernel logger driver. An attempt to read less than this amount
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* may result in read() returning EINVAL.
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*/
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#define LOGGER_ENTRY_MAX_LEN (5*1024)
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#ifdef HAVE_IOCTL
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#include <sys/ioctl.h>
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#define __LOGGERIO 0xAE
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#define LOGGER_GET_LOG_BUF_SIZE _IO(__LOGGERIO, 1) /* size of log */
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#define LOGGER_GET_LOG_LEN _IO(__LOGGERIO, 2) /* used log len */
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#define LOGGER_GET_NEXT_ENTRY_LEN _IO(__LOGGERIO, 3) /* next entry len */
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#define LOGGER_FLUSH_LOG _IO(__LOGGERIO, 4) /* flush log */
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#define LOGGER_GET_VERSION _IO(__LOGGERIO, 5) /* abi version */
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#define LOGGER_SET_VERSION _IO(__LOGGERIO, 6) /* abi version */
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#endif // HAVE_IOCTL
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#endif /* _UTILS_LOGGER_H */
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