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ProcFS: Expose info about devices in /proc/devices

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Sergey Bugaev 2019-08-18 14:58:47 +03:00 committed by Andreas Kling
parent acccf9ccda
commit 0f8b45c015
Notes: sideshowbarker 2024-07-19 12:36:34 +09:00 
Author: https://github.com/bugaevc
Commit: https://github.com/SerenityOS/serenity/commit/0f8b45c0150
Pull-request: https://github.com/SerenityOS/serenity/pull/465
1 changed files with 23 additions and 0 deletions
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23
Kernel/FileSystem/ProcFS.cpp
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@ -47,6 +47,7 @@ enum ProcFileType {
FI_Root_inodes,
FI_Root_dmesg,
FI_Root_pci,
FI_Root_devices,
FI_Root_uptime,
FI_Root_cmdline,
FI_Root_self, // symlink
@ -269,6 +270,27 @@ Optional<KBuffer> procfs$pci(InodeIdentifier)
return json.serialized<KBufferBuilder>();
}
Optional<KBuffer> procfs$devices(InodeIdentifier)
{
JsonArray json;
Device::for_each([&json](auto& device) {
JsonObject obj;
obj.set("major", device.major());
obj.set("minor", device.minor());
obj.set("class_name", device.class_name());
if (device.is_block_device())
obj.set("type", "block");
else if (device.is_character_device())
obj.set("type", "character");
else
ASSERT_NOT_REACHED();
json.append(move(obj));
});
return json.serialized<KBufferBuilder>();
}
Optional<KBuffer> procfs$uptime(InodeIdentifier)
{
KBufferBuilder builder;
@ -1198,6 +1220,7 @@ ProcFS::ProcFS()
m_entries[FI_Root_dmesg] = { "dmesg", FI_Root_dmesg, procfs$dmesg };
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_devices] = { "devices", FI_Root_devices, procfs$devices };
m_entries[FI_Root_uptime] = { "uptime", FI_Root_uptime, procfs$uptime };
m_entries[FI_Root_cmdline] = { "cmdline", FI_Root_cmdline, procfs$cmdline };
m_entries[FI_Root_sys] = { "sys", FI_Root_sys };