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commit ea1714f3e47b421f677ac5bcfd2a5a1eceb4969a Author: Marco Casaroli <[email protected]> AuthorDate: Fri Oct 23 16:32:30 2026 +0200 Documentation: Describe the user and group of a process in procfs. Describe the Uid: and Gid: lines of /proc/<pid>/status and the owner of the /proc/<pid> entries with CONFIG_SCHED_USER_IDENTITY. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Marco Casaroli <[email protected]> --- Documentation/os/filesystem/procfs.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/Documentation/os/filesystem/procfs.rst b/Documentation/os/filesystem/procfs.rst index 9f3cc7f6ae0..9a914c68b94 100644 --- a/Documentation/os/filesystem/procfs.rst +++ b/Documentation/os/filesystem/procfs.rst @@ -49,3 +49,16 @@ Example:: nsh> cat /proc/2/cmdline <pthread> 0x527420 + +Process user and group +====================== + +With ``CONFIG_SCHED_USER_IDENTITY=y``, ``/proc/<pid>/status`` has two more +lines. ``Uid:`` gives the real and the effective user ID of the task group +of ``<pid>``. ``Gid:`` gives the real and the effective group ID:: + + Uid: 1000 1000 + Gid: 1000 1000 + +``stat()`` of ``/proc/<pid>`` and of the files in it gives the effective +user and group ID of the task group in ``st_uid`` and ``st_gid``.
