NAME

       acl_set_qualifier — set the qualifier of an ACL entry

LIBRARY

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

SYNOPSIS

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

       int
       acl_set_qualifier(acl_entry_t entry_d, const void *qualifier_p);

DESCRIPTION

       The acl_set_qualifier() function sets the qualifier of the ACL entry indicated by the argument entry_d to
       the  value  referred  to  by  the  argument  qualifier_p.   If the value of the tag type in the ACL entry
       referred to by entry_d is ACL_USER, then the value referred to by qualifier_p shall be of type uid_t.  If
       the value of the tag type in the ACL entry referred to by entry_d is ACL_GROUP, then the  value  referred
       to  by  qualifier_p shall be of type gid_t.  If the value of the tag type in the ACL entry referred to by
       entry_d is a tag type for which a qualifier is not supported, acl_set_qualifier() returns an error.

       Any ACL entry descriptors that refer to the entry referred to by entry_d continue to refer to that entry.
       This function may cause memory to be allocated. The caller should free any releasable  memory,  when  the
       ACL is no longer required, by calling acl_free() with a pointer to the ACL as argument.

RETURN VALUE

       The  acl_set_qualifier()  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_set_qualifier() function returns -1 and sets  errno  to
       the corresponding value:

       [EINVAL]           The argument entry_d is not a valid descriptor for an ACL entry.

                          The  value  of  the  tag  type  in the ACL entry referenced by the argument entry_d is
                          neither ACL_USER nor ACL_GROUP.

                          The value pointed to by the argument qualifier_p is not valid.

       [ENOMEM]           The acl_set_qualifier() function is unable to allocate the memory required for the ACL
                          qualifier.

STANDARDS

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

SEE ALSO

       acl_create_entry(3),   acl_free(3),   acl_get_permset(3),   acl_get_qualifier(3),    acl_get_tag_type(3),
       acl_set_entry(3), acl_set_permset(3), acl_set_tag_type(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                             ACL_SET_QUALIFIER(3)