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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 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
     〈a.gruenbacher@bestbits.at〉.