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console: add simple dmesg functionality (enable only on v5)

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This commit is contained in:
Beat Küng
2019-06-04 11:57:54 +02:00
committed by Julian Oes
parent 2307c7c390
commit d947818654
10 changed files with 388 additions and 0 deletions
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src/platforms/px4_console_buffer.h
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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.
*
****************************************************************************/
/**
* @file px4_console_buffer.h
* This implements a simple console buffer to store the full bootup output.
* It can be printed via the 'dmesg' utility.
* The output of stdout is redirected to CONSOLE_BUFFER_DEVICE, which is stored
* to a circular buffer and output to stderr, so that everything is still printed
* to the original console.
*/
#define CONSOLE_BUFFER_DEVICE "/dev/console_buf"
__BEGIN_DECLS
/**
* Initialize the console buffer: register the CONSOLE_BUFFER_DEVICE
* @return 0 on success, <0 error otherwise
*/
int px4_console_buffer_init();
/**
* Print content of the console buffer to stdout
* @param follow if true keep waiting and print new content whenever the buffer
* is updated
*/
void px4_console_buffer_print(bool follow);
__END_DECLS
src/systemcmds/dmesg/CMakeLists.txt
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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.
#
############################################################################
px4_add_module(
MODULE systemcmds__dmesg
MAIN dmesg
STACK_MAIN 900
SRCS
dmesg.cpp
)
src/systemcmds/dmesg/dmesg.cpp
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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_config.h>
#include <px4_console_buffer.h>
#include <px4_module.h>
#include <px4_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[]);
}
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);
}
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;
}