ACL_ADD_PERM(3)            Library Functions Manual            ACL_ADD_PERM(3)

NAME
     acl_add_perm - add a permission to an ACL permission set

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

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 adds the permission contained in the argument
     perm (one of ACL_READ, ACL_WRITE, ACL_EXECUTE) to the permission set
     referred to by the argument permset_d.  An attempt to add a permission
     that is already contained in the permission set is not considered an
     error.

     Any existing descriptors that refer to permset_d continue to refer to
     that permission set.

RETURN VALUE
     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
     If any of the following conditions occur, the acl_add_perm() function
     returns -1 and sets errno to the corresponding value:

     [EINVAL]           The argument permset_d is not a valid descriptor for a
                        permission set within an ACL entry.

                        The argument perm does not contain a valid acl_perm_t
                        value.

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

SEE ALSO
     acl_clear_perms(3), acl_delete_perm(3), acl_get_perm(3),
     acl_get_permset(3), acl_set_permset(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
     <andreas.gruenbacher@gmail.com>.

Linux ACL                       March 23, 2002                       Linux ACL