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Expose the kernel log buffer through /proc/dmesg.

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Also add a /bin/dmesg program for convenience.
This commit is contained in:
Andreas Kling 2019-01-28 22:40:55 +01:00
parent 442351a5f8
commit 7455f5ea42
8 changed files with 77 additions and 0 deletions
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11
Kernel/ProcFileSystem.cpp
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@ -6,6 +6,7 @@
#include "StdLib.h"
#include "i386.h"
#include "KSyms.h"
#include "Console.h"
#include <AK/StringBuilder.h>
static ProcFS* s_the;
@ -198,6 +199,15 @@ ByteBuffer procfs$mm(SynthFSInode&)
return builder.to_byte_buffer();
}
ByteBuffer procfs$dmesg(SynthFSInode&)
{
InterruptDisabler disabler;
StringBuilder builder;
for (char ch : Console::the().logbuffer())
builder.append(ch);
return builder.to_byte_buffer();
}
ByteBuffer procfs$mounts(SynthFSInode&)
{
InterruptDisabler disabler;
@ -386,6 +396,7 @@ bool ProcFS::initialize()
add_file(create_generated_file("summary", procfs$summary));
add_file(create_generated_file("cpuinfo", procfs$cpuinfo));
add_file(create_generated_file("inodes", procfs$inodes));
add_file(create_generated_file("dmesg", procfs$dmesg));
m_sys_dir = add_file(create_directory("sys"));
return true;
}