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Kernel: Don't assume paths of TTYs and pseudo terminals anymore

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The obsolete ttyname and ptsname syscalls are removed.
LibC doesn't rely on these anymore, and it helps simplifying the Kernel
in many places, so it's an overall an improvement.

In addition to that, /proc/PID/tty node is removed too as it is not
needed anymore by userspace to get the attached TTY of a process, as
/dev/tty (which is already a character device) represents that as well.
This commit is contained in:
Liav A 2022-02-15 21:41:41 +02:00 • committed by Andreas Kling
parent de7566c2c4
commit b5ef900ccd
19 changed files with 13 additions and 141 deletions
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6
Kernel/FileSystem/ProcFS.cpp
View file

@ -309,8 +309,6 @@ ErrorOr<NonnullRefPtr<Inode>> ProcFSProcessDirectoryInode::lookup(StringView nam
return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::PerformanceEvents, associated_pid()));
if (name == "vm"sv)
return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats, associated_pid()));
if (name == "tty"sv)
return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::TTYLink, associated_pid()));
return ENOENT;
}
@ -447,8 +445,6 @@ static mode_t determine_procfs_process_inode_mode(SegmentedProcFSIndex::ProcessS
return S_IFLNK | 0777;
if (main_property == SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink)
return S_IFLNK | 0777;
if (main_property == SegmentedProcFSIndex::MainProcessProperty::TTYLink)
return S_IFLNK | 0777;
return S_IFREG | 0400;
}
@ -552,8 +548,6 @@ ErrorOr<void> ProcFSProcessPropertyInode::try_to_acquire_data(Process& process,
return process.procfs_get_perf_events(builder);
case SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats:
return process.procfs_get_virtual_memory_stats(builder);
case SegmentedProcFSIndex::MainProcessProperty::TTYLink:
return process.procfs_get_tty_link(builder);
default:
VERIFY_NOT_REACHED();
}