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uapi/fcntl: add FD_PIDFS_ROOT

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Add a special file descriptor indicating the root of the pidfs
filesystem.

Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-06-24 16:57:51 +02:00
parent cd5d200632
commit 3941e37f62
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include/uapi/linux/fcntl.h
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@ -110,6 +110,7 @@
#define PIDFD_SELF_THREAD -10000 /* Current thread. */
#define PIDFD_SELF_THREAD_GROUP -10001 /* Current thread group leader. */
#define FD_PIDFS_ROOT -10002 /* Root of the pidfs filesystem */
#define FD_INVALID -10009 /* Invalid file descriptor: -10000 - EBADF = -10009 */
/* Generic flags for the *at(2) family of syscalls. */