NAME

t_error - produce error message

SYNOPSIS

#include <tiuser.h>

void t_error(errmsg)
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

UNIX System V Network Programmer's Guide.