dmesg.cpp
2.84 KB
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/****************************************************************************
*
* Copyright (c) 2019 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#include <px4_platform_common/px4_config.h>
#include <px4_platform_common/console_buffer.h>
#include <px4_platform_common/module.h>
#include <px4_platform_common/getopt.h>
#ifndef BOARD_ENABLE_CONSOLE_BUFFER
#error "This module can only be used on boards that enable BOARD_ENABLE_CONSOLE_BUFFER"
#endif
static void usage();
extern "C" {
__EXPORT int dmesg_main(int argc, char *argv[]);
}
int
dmesg_main(int argc, char *argv[])
{
int myoptind = 1;
int ch;
const char *myoptarg = nullptr;
bool follow = false;
while ((ch = px4_getopt(argc, argv, "f", &myoptind, &myoptarg)) != EOF) {
switch (ch) {
case 'f':
follow = true;
break;
default:
usage();
return -1;
break;
}
}
px4_console_buffer_print(follow);
return 0;
}
static void
usage()
{
PRINT_MODULE_DESCRIPTION(
R"DESCR_STR(
### Description
Command-line tool to show bootup console messages.
Note that output from NuttX's work queues and syslog are not captured.
### Examples
Keep printing all messages in the background:
$ dmesg -f &
)DESCR_STR");
PRINT_MODULE_USAGE_NAME("dmesg", "system");
PRINT_MODULE_USAGE_PARAM_FLAG('f', "Follow: wait for new messages", true);
}