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Add a simple /bin/df which gathers its info from /proc/df.

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This commit is contained in:
Andreas Kling 2019-02-21 14:48:00 +01:00
parent 7d288aafb2
commit 43075e5878
8 changed files with 119 additions and 0 deletions
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23
Kernel/ProcFS.cpp
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@ -28,6 +28,7 @@ enum ProcFileType {
__FI_Root_Start,
FI_Root_mm,
FI_Root_mounts,
FI_Root_df,
FI_Root_kmalloc,
FI_Root_all,
FI_Root_summary,
@ -399,6 +400,27 @@ ByteBuffer procfs$mounts(InodeIdentifier)
return builder.to_byte_buffer();
}
ByteBuffer procfs$df(InodeIdentifier)
{
// FIXME: This is obviously racy against the VFS mounts changing.
StringBuilder builder;
VFS::the().for_each_mount([&builder] (auto& mount) {
auto& fs = mount.guest_fs();
builder.appendf("%s,", fs.class_name());
builder.appendf("%u,", fs.total_block_count());
builder.appendf("%u,", fs.free_block_count());
builder.appendf("%u,", fs.total_inode_count());
builder.appendf("%u,", fs.free_inode_count());
if (!mount.host().is_valid())
builder.append("/");
else {
builder.append(VFS::the().absolute_path(mount.host()));
}
builder.append('\n');
});
return builder.to_byte_buffer();
}
ByteBuffer procfs$cpuinfo(InodeIdentifier)
{
StringBuilder builder;
@ -1076,6 +1098,7 @@ ProcFS::ProcFS()
m_entries.resize(FI_MaxStaticFileIndex);
m_entries[FI_Root_mm] = { "mm", FI_Root_mm, procfs$mm };
m_entries[FI_Root_mounts] = { "mounts", FI_Root_mounts, procfs$mounts };
m_entries[FI_Root_df] = { "df", FI_Root_df, procfs$df };
m_entries[FI_Root_kmalloc] = { "kmalloc", FI_Root_kmalloc, procfs$kmalloc };
m_entries[FI_Root_all] = { "all", FI_Root_all, procfs$all };
m_entries[FI_Root_summary] = { "summary", FI_Root_summary, procfs$summary };