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RedHat 9 (Linux i386) - man page for acl_get_file (redhat section 3)

ACL_GET_FILE(3) 		   BSD Library Functions Manual 		  ACL_GET_FILE(3)

NAME
     acl_get_file -- get an ACL by filename

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

SYNOPSIS
     #include <sys/types.h>
     #include <sys/acl.h>

     acl_t
     acl_get_file(const char *path_p, acl_type_t type);

DESCRIPTION
     The acl_get_file() function retrieves the access ACL associated with a file or directory, or
     the default ACL associated with a directory. The pathname for the file or directory is
     pointed to by the argument path_p.  The ACL is placed into working storage and
     acl_get_file() 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.

     The value of the argument type is used to indicate whether the access ACL or the default ACL
     associated with path_p is returned. If type is ACL_TYPE_ACCESS, the access ACL of path_p is
     returned. If type is ACL_TYPE_DEFAULT, the default ACL of path_p is returned. If type is
     ACL_TYPE_DEFAULT and no default ACL is associated with the directory path_p, then an ACL
     containing zero ACL entries is returned. If type specifies a type of ACL that cannot be
     associated with path_p, then the function fails.

     This function may cause memory to be allocated.  The caller should free any releasable mem-
     ory, when the new ACL is no longer required, by calling acl_free(3) with the (void*)acl_t
     returned by acl_get_file() as an argument.

RETURN VALUE
     Upon successful completion, this function returns a pointer to the working storage.  Other-
     wise, a value of (acl_t)NULL is returned, and errno is set to indicate the error.

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

     [EACCES]		Search permission is denied for a component of the path prefix or the
			object exists and the process does not have appropriate access rights.

			Argument type specifies a type of ACL that cannot be associated with
			path_p.

     [EINVAL]		The argument type is not ACL_TYPE_ACCESS or ACL_TYPE_DEFAULT.

     [ENAMETOOLONG]	The length of the argument path_p is too long.

     [ENOENT]		The named object does not exist or the argument path_p points to an empty
			string.

     [ENOMEM]		The ACL working storage requires more memory than is allowed by the hard-
			ware or system-imposed memory management constraints.

     [ENOTDIR]		A component of the path prefix is not a directory.

     [ENOTSUP]		The file system on which the file identified by path_p is located 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_fd(3), acl_set_file(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				Linux ACL


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