NAME

t_error − produce error message

SYNOPSIS

cc [ flag ... ] file ... −lnsl [ library ... ]

#include <tiuser.h>

void t_error(const char ∗errmsg);

extern int t_errno;
extern char ∗t_errlist[];
extern int t_nerr;

DESCRIPTION

t_error() produces a message on the standard error output which describes the last error encountered during a call to a transport function.  The argument string errmsg is a user-supplied error message that gives context to the error. 

t_error() prints the user-supplied error message followed by a colon and the standard transport function error message for the current value contained in t_errno.  If t_errno is TSYSERR, t_error will also print the standard error message for the current value contained in errno (see intro(2)). 

t_errlist is the array of message strings, to allow user message formatting.  t_errno can be used as an index into this array to retrieve the error message string (without a terminating newline).  t_nerr is the maximum index value for the t_errlist array. 

t_errno is set when an error occurs and is not cleared on subsequent successful calls. 

EXAMPLE

If a t_connect() function fails on transport endpoint fd2 because a bad address was given, the following call might follow the failure:

t_error("t_connect failed on fd2");

The diagnostic message would print as:

t_connect failed on fd2:  Incorrect transport address format

where "t_connect failed on fd2" tells the user which function failed on which transport endpoint, and “Incorrect transport address format” identifies the specific error that occurred. 

SEE ALSO

intro(2)

SunOS 5.1 Network Interfaces Programmer’s Guide

SunOS 5.1  —  Last change: 3 Jul 1990