chown(8) - change file owner and group {oss}

chroot(8) - change root directory {oss}

sticky(8) - sticky text and append-only directories {oss}

Applications and Utilities

lockf (3) - record locking on files {oss}

flock (2) - apply or remove an advisory lock on an open file {oss}

access (2) - check access permissions of a file or pathname {oss}

chflags fchflags (2) - set file flags {oss}

chmod fchmod (2) - change mode of file {oss}

chown lchown fchown (2) - change owner and group of a file or link {oss}

umask (2) - set file creation mode mask {oss}

acl_canonicalize_principal acl_check acl_exact_match acl_add acl_delete acl_initialize (3) - Access control list routines {oss}

getmode setmode (3) - modify mode bits {oss}

Libraries and Functions

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See also Process Limits: File Access - Process Limits on File access (permissions, ownership, modes, et al)

See also: File Information - Obtaining file information (status, configuration, et al)

Up to File System Access - Gateway topic to file system (files and directory) access and operations.