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 <a.gruenbacher@bestbits.at>.