Reference Guide

ZCOM C I/F Library Routines
ZLTUP (3X)
Chapter 4 257
ZLTUP (3X)
NAME zltup – Update logical terminal table
SYNOPSIS
#include <zcom/zcomsys.h>
#include <zcom/zcomcall.h> /* if compiled with ANSI C (recommended) */
int32 zltup (zap, ibuf, len, offset)
zaddr_type *zap;
char *ibuf;
int32 len;
int32 offset;
DESCRIPTION Routine zltup is used to update information in the user area of the logical
terminal area. This user area contains information such as details
pertaining to the location of the terminal, a user-assigned terminal name
and the extension area (of configurable size). For complete details see the
section on logical terminal tables.
Part of the logical terminal table is assigned by TTGEN, the rest is
initialized according to the parameters specified in the TTGEN
configuration file. The table extension (if defined) is set up and
initialized to zero by the system (unless LDATA is specified in the
TTGEN configuration file to pre-define the values).
Typically, zltup is used to update the user data kept in the table
extension area.
The libraries libzcom_c.a and libpthread.a must be linked into the calling
program by giving the options “-lzcom_c -lpthread” to cc(1) or ld(1).
Threads
Considerations
This routine may be called from a multi-threaded application using the
POSIX (1003.1c) kernel threads API package. This routine has the
following characteristics when called by a multi-threaded application:
cancellation point Thread cancellation can occur when a thread calls
this routine.