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Kernel: Expose kernel command line to userspace through /proc/cmdline

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Robin Burchell 2019-06-16 14:05:07 +02:00 committed by Andreas Kling
parent 267672efee
commit 0a3abcc0a8
Notes: sideshowbarker 2024-07-19 13:34:48 +09:00 
Author: https://github.com/rburchell
Commit: https://github.com/SerenityOS/serenity/commit/0a3abcc0a84
Pull-request: https://github.com/SerenityOS/serenity/pull/233
2 changed files with 14 additions and 1 deletions
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10
Kernel/FileSystem/ProcFS.cpp
View file

@ -9,6 +9,7 @@
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/KParams.h>
#include <Kernel/Net/NetworkAdapter.h>
#include <Kernel/PCI.h>
#include <Kernel/VM/MemoryManager.h>
@ -41,6 +42,7 @@ enum ProcFileType {
FI_Root_dmesg,
FI_Root_pci,
FI_Root_uptime,
FI_Root_cmdline,
FI_Root_netadapters,
FI_Root_self, // symlink
FI_Root_sys, // directory
@ -253,6 +255,13 @@ ByteBuffer procfs$uptime(InodeIdentifier)
return builder.to_byte_buffer();
}
ByteBuffer procfs$cmdline(InodeIdentifier)
{
StringBuilder builder;
builder.appendf("%s\n", KParams::the().cmdline().characters());
return builder.to_byte_buffer();
}
ByteBuffer procfs$netadapters(InodeIdentifier)
{
StringBuilder builder;
@ -1113,6 +1122,7 @@ ProcFS::ProcFS()
m_entries[FI_Root_self] = { "self", FI_Root_self, procfs$self };
m_entries[FI_Root_pci] = { "pci", FI_Root_pci, procfs$pci };
m_entries[FI_Root_uptime] = { "uptime", FI_Root_uptime, procfs$uptime };
m_entries[FI_Root_cmdline] = { "cmdline", FI_Root_cmdline, procfs$cmdline };
m_entries[FI_Root_netadapters] = { "netadapters", FI_Root_netadapters, procfs$netadapters };
m_entries[FI_Root_sys] = { "sys", FI_Root_sys };

5
Kernel/run
View file

@ -2,7 +2,7 @@
[ -z "$SERENITY_QEMU_BIN" ] && SERENITY_QEMU_BIN="qemu-system-i386"
SERENITY_KERNEL_CMDLINE="hello"
[ -z "$SERENITY_KERNEL_CMDLINE" ] && SERENITY_KERNEL_CMDLINE="hello"
export SDL_VIDEO_X11_DGAMOUSE=0
@ -18,6 +18,7 @@ elif [ "$1" = "qn" ]; then
-debugcon stdio \
-device e1000 \
-kernel kernel \
-append "${SERENITY_KERNEL_CMDLINE}" \
-hda _disk_image \
-soundhw pcspk
elif [ "$1" = "qtap" ]; then
@ -31,6 +32,7 @@ elif [ "$1" = "qtap" ]; then
-netdev tap,ifname=tap0,id=br0 \
-device e1000,netdev=br0 \
-kernel kernel \
-append "${SERENITY_KERNEL_CMDLINE}" \
-hda _disk_image \
-soundhw pcspk
elif [ "$1" = "qgrub" ]; then
@ -56,6 +58,7 @@ else
-netdev user,id=breh,hostfwd=tcp:127.0.0.1:8888-192.168.5.2:8888 \
-device e1000,netdev=breh \
-kernel kernel \
-append "${SERENITY_KERNEL_CMDLINE}" \
-hda _disk_image \
-soundhw pcspk
fi