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Userland: Add a utility for viewing interrupts from ProcFS

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Liav A 2020-02-22 20:52:54 +02:00 • committed by Andreas Kling
parent 80eea6cd8b
commit d51c81f475
1 changed files with 75 additions and 0 deletions
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Userland/lsinterrupts.cpp Normal file
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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* 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.
*
* 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 HOLDER 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 <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/String.h>
#include <LibCore/File.h>
#include <stdio.h>
int main(int argc, char** argv)
{
UNUSED_PARAM(argc);
UNUSED_PARAM(argv);
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/proc/interrupts", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
auto proc_interrupts = Core::File::construct("/proc/interrupts");
if (!proc_interrupts->open(Core::IODevice::ReadOnly)) {
fprintf(stderr, "Error: %s\n", proc_interrupts->error_string());
return 1;
}
if (pledge("stdio", nullptr) < 0) {
perror("pledge");
return 1;
}
printf("%-18s %-10s %-13s\n", "Device", "Interrupt", "Call Counter");
auto file_contents = proc_interrupts->read_all();
auto json = JsonValue::from_string(file_contents).as_array();
json.for_each([](auto& value) {
auto handler = value.as_object();
auto purpose = handler.get("purpose").to_string();
auto interrupt = handler.get("interrupt_line").to_string();
auto call_count = handler.get("call_count").to_string();
printf("%-18s %-10s %-13s\n",
purpose.characters(), interrupt.characters(), call_count.characters());
});
return 0;
}