Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
acl_t
acl_get_fd(int fd)
DESCRIPTION
The acl_get_fd() function retrieves the access ACL associated with the
file referred to by fd. The ACL is placed into working storage and
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_free(3) with the (void*)acl_t returned by acl_get_fd() as an argu
ment.
RETURN VALUE
Upon successful completion, this function shall return a pointer to the
working storage. Otherwise, a value of (acl_t)NULL shall be returned,
and errno shall be set to indicate the error.
ERRORS
If any of the following conditions occur, the acl_get_fd() function re
turns a value of (acl_t)NULL and sets errno to the corresponding value:
[EBADF] The fd argument is not a valid file descriptor.
[ENOMEM] The ACL working storage requires more memory than is al
lowed by the hardware or system-imposed memory management
constraints.
[ENOTSUP] The file system on which the file identified by fd is lo
cated does not support ACLs, or ACLs are disabled.
STANDARDS
IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)
SEE ALSO
acl_free(3), acl_get_entry(3), acl_get_file(3), acl_set_fd(3), acl(5)
AUTHOR
Derived from the FreeBSD manual pages written by Robert N M Watson
<rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
<a.gruenbacher@computer.org>.
Linux ACL March 23, 2002 1
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