/* Reserved kernel ranges [-100], [-10000, -40000]. */ #define AT_FDCWD -100/* Special value for dirfd used to indicateopenatshouldusethe
current working directory. */
/* *Theconceptofprocessandthreadsinuserlandandthekernelisaconfusing *one-withinthekerneleverythreadisa'task'withitsownindividualPID, *howeverfromuserland'spointofviewthreadsaregroupedbyasinglePID, *whichisthatofthe'threadgroupleader',typicallythefirstthread *spawned. * *TocuttheGideonknot,forinternalkernelusage,wereferto *PIDFD_SELF_THREADtorefertothecurrentthread(ortaskfromakernel *perspective),andPIDFD_SELF_THREAD_GROUPtorefertothecurrentthread *groupleader...
*/ #define PIDFD_SELF_THREAD -10000/* Current thread. */ #define PIDFD_SELF_THREAD_GROUP -10001/* Current thread group leader. */
/* Flags for renameat2(2) (must match legacy RENAME_* flags). */ #define AT_RENAME_NOREPLACE 0x0001 #define AT_RENAME_EXCHANGE 0x0002 #define AT_RENAME_WHITEOUT 0x0004
/* Flag for faccessat(2). */ #define AT_EACCESS 0x200 /* Test access permitted for
effective IDs, not real IDs. */ /* Flag for unlinkat(2). */ #define AT_REMOVEDIR 0x200 /* Remove directory instead of
unlinking file. */ /* Flags for name_to_handle_at(2). */ #define AT_HANDLE_FID 0x200 /* File handle is needed to compare objectidentityandmaynotbe
usable with open_by_handle_at(2). */ #define AT_HANDLE_MNT_ID_UNIQUE 0x001 /* Return the u64 unique mount ID. */ #define AT_HANDLE_CONNECTABLE 0x002 /* Request a connectable file handle */
/* Flags for execveat2(2). */ #define AT_EXECVE_CHECK 0x10000 /* Only perform a check if execution
would be allowed. */
#endif/* _UAPI_LINUX_FCNTL_H */
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