acl_get_fd (3) - Linux Manuals

acl_get_fd: get an ACL by file descriptor

NAME

acl_get_fd - get an ACL by file descriptor

LIBRARY

Linux Access Control Lists library (libacl, -lacl).

SYNOPSIS

In sys/types.h In sys/acl.h Ft acl_t Fn acl_get_fd int fd

DESCRIPTION

The Fn acl_get_fd function retrieves the access ACL associated with the file referred to by fd The ACL is placed into working storage and Fn acl_get_fd returns a pointer to that storage.

In order to read an ACL from an object, a process must have read access to the object's attributes.

This function may cause memory to be allocated. The caller should free any releasable memory, when the new ACL is no longer required, by calling acl_free3 with the (void*)acl_t returned by Fn acl_get_fd as an argument.

RETURN VALUE

On success, this function shall return a pointer to the working storage. On error, a value of (acl_t)NULL shall be returned, and errno is set appropriately.

ERRORS

If any of the following conditions occur, the Fn acl_get_fd function returns a value of (acl_t)NULL and sets errno to the corresponding value:

Bq Er EBADF

The fd argument is not a valid file descriptor.

Bq Er ENOMEM

The ACL working storage requires more memory than is allowed by the hardware or system-imposed memory management constraints.

Bq Er ENOTSUP

The file system on which the file identified by fd is located does not support ACLs, or ACLs are disabled.

STANDARDS

IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)

AUTHOR

Derived from the FreeBSD manual pages written by An Robert N M Watson Aq rwatson [at] FreeBSD.org , and adapted for Linux by An Andreas Gruenbacher Aq a.gruenbacher [at] bestbits.at .