acl_set_file

ACL_SET_FILE(3)		 BSD Library Functions Manual	      ACL_SET_FILE(3)

NAME
     acl_set_file - set an ACL by filename

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

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

     int
     acl_set_file(const char *path_p, acl_type_t type, acl_t acl);

DESCRIPTION
     The acl_set_file() function associates an access ACL with a file or
     directory, or associates a default ACL with a directory. The pathname
     for the file or directory is pointed to by the argument path_p.

     The effective user ID of the process must match the owner of the file or
     directory or the process must have the CAP_FOWNER capability for the
     request to succeed.

     The value of the argument type is used to indicate whether the access
     ACL or the default ACL associated with path_p is being set. If the type
     parameter is ACL_TYPE_ACCESS, the access ACL of path_p shall be set. If
     the type parameter is ACL_TYPE_DEFAULT, the default ACL of path_p shall
     be set. If the argument type specifies a type of ACL that cannot be
     associated with path_p, then the function fails.

     The acl parameter must reference a valid ACL according to the rules
     described on the acl_valid(3) manual page if the type parameter is
     ACL_TYPE_ACCESS, and must either reference a valid ACL or an ACL with
     zero ACL entries if the type parameter is ACL_TYPE_DEFAULT. If the acl
     parameter references an empty ACL, then the acl_set_file() function
     removes any default ACL associated with the directory referred to by the
     path_p parameter.

RETURN VALUE
     The acl_set_file() function returns the value 0 if successful; otherwise
     the value -1 is returned and the global variable errno is set to indi-
     cate the error.

ERRORS
     If any of the following conditions occur, the acl_set_file() function
     returns -1 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 acl does not point to a valid ACL.

			The ACL has more entries than the file referred to by
			path_p can obtain.

			The type parameter is not ACL_TYPE_ACCESS or
			ACL_TYPE_DEFAULT.

			The type parameter is ACL_TYPE_DEFAULT, but the file
			referred to by path_p is not a directory.

     [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.

     [ENOSPC]		The directory or file system that would contain the
			new ACL cannot be extended or the file system is out
			of file allocation resources.

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

     [ENOTSUP]		The file identified by path_p cannot be associated
			with the ACL because the file system on which the
			file is located does not support this.

     [EPERM]		The process does not have appropriate privilege to
			perform the operation to set the ACL.

     [EROFS]		This function requires modification of a file system
			which is currently read-only.

STANDARDS
     IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)

     The behavior of acl_set_file() when the acl parameter refers to an empty
     ACL and the type parameter is ACL_TYPE_DEFAULT is an extension in the
     Linux implementation, in order that all values returned by
     acl_get_file() can be passed to acl_set_file().  The POSIX.1e function
     for removing a default ACL is acl_delete_def_file().

SEE ALSO
     acl_delete_def_file(3), acl_get_file(3), acl_set_fd(3), acl_valid(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