acl_add_perm man page on GhostBSD

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ACL_ADD_PERM(3)		 BSD Library Functions Manual	       ACL_ADD_PERM(3)

NAME
     acl_add_perm — add permissions to a permission set

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     acl_add_perm(acl_permset_t permset_d, acl_perm_t perm);

DESCRIPTION
     The acl_add_perm() function is a POSIX.1e call that adds the permission
     contained in perm to the permission set permset_d.

     Note: it is not considered an error to attempt to add permissions that
     already exist in the permission set.

     For POSIX.1e ACLs, valid values are:

	ACL_EXECUTE		 Execute permission
	ACL_WRITE		 Write permission
	ACL_READ		 Read permission

     For NFSv4 ACLs, valid values are:

	ACL_READ_DATA		 Read permission
	ACL_LIST_DIRECTORY	 Same as ACL_READ_DATA
	ACL_WRITE_DATA		 Write permission, or permission to create
				 files
	ACL_ADD_FILE		 Same as ACL_READ_DATA
	ACL_APPEND_DATA		 Permission to create directories. Ignored for
				 files
	ACL_ADD_SUBDIRECTORY	 Same as ACL_APPEND_DATA
	ACL_READ_NAMED_ATTRS	 Ignored
	ACL_WRITE_NAMED_ATTRS	 Ignored
	ACL_EXECUTE		 Execute permission
	ACL_DELETE_CHILD	 Permission to delete files and subdirectories
	ACL_READ_ATTRIBUTES	 Permission to read basic attributes
	ACL_WRITE_ATTRIBUTES	 Permission to change basic attributes
	ACL_DELETE		 Permission to delete the object this ACL is
				 placed on
	ACL_READ_ACL		 Permission to read ACL
	ACL_WRITE_ACL		 Permission to change the ACL and file mode
	ACL_SYNCHRONIZE		 Ignored

     Calling acl_add_perm() with perm equal to ACL_WRITE or ACL_READ brands
     the ACL as POSIX.	Calling it with ACL_READ_DATA, ACL_LIST_DIRECTORY,
     ACL_WRITE_DATA, ACL_ADD_FILE, ACL_APPEND_DATA, ACL_ADD_SUBDIRECTORY,
     ACL_READ_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS, ACL_DELETE_CHILD,
     ACL_READ_ATTRIBUTES, ACL_WRITE_ATTRIBUTES, ACL_DELETE, ACL_READ_ACL,
     ACL_WRITE_ACL or ACL_SYNCHRONIZE brands the ACL as NFSv4.

RETURN VALUES
     The acl_add_perm() function returns the value 0 if successful; otherwise
     the value -1 is returned and the global variable errno is set to indicate
     the error.

ERRORS
     The acl_add_perm() function fails if:

     [EINVAL]		Argument permset_d is not a valid descriptor for a
			permission set within an ACL entry.  Argument perm
			does not contain a valid acl_perm_t value.  ACL is
			already branded differently.

SEE ALSO
     acl(3), acl_clear_perms(3), acl_delete_perm(3), acl_get_brand_np(3),
     acl_get_permset(3), acl_set_permset(3), posix1e(3)

STANDARDS
     POSIX.1e is described in IEEE POSIX.1e draft 17.

HISTORY
     POSIX.1e support was introduced in FreeBSD 4.0.  The acl_add_perm() func‐
     tion was added in FreeBSD 5.0.

AUTHORS
     The acl_add_perm() function was written by Chris D. Faulhaber
     ⟨jedgar@fxp.org⟩.

BSD				 June 25, 2009				   BSD
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