t_error(3NSL) Networking Services Library Functions t_error(3NSL)NAMEt_error - produce error message
SYNOPSIS
#include <xti.h>
int t_error(const char *errmsg);
DESCRIPTION
This routine is part of the XTI interfaces which evolved from the TLI
interfaces. XTI represents the future evolution of these interfaces.
However, TLI interfaces are supported for compatibility. When using a
TLI routine that has the same name as an XTI routine, the tiuser.h
header file must be used. Refer to the TLI COMPATIBILITY section for
a description of differences between the two interfaces.
The t_error() function 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.
The error message is written as follows: first (if errmsg is not a null
pointer and the character pointed to be errmsg is not the null charac‐
ter) the string pointed to by errmsg followed by a colon and a space;
then a standard error message string for the current error defined in
t_errno. If t_errno has a value different from TSYSERR, the standard
error message string is followed by a newline character. If, however,
t_errno is equal to TSYSERR, the t_errno string is followed by the
standard error message string for the current error defined in errno
followed by a newline.
The language for error message strings written by t_error() is that of
the current locale. If it is English, the error message string
describing the value in t_errno may be derived from the comments fol‐
lowing the t_errno codes defined in xti.h. The contents of the error
message strings describing the value in errno are the same as those
returned by the strerror(3C) function with an argument of errno.
The error number, t_errno, is only set when an error occurs and it is
not cleared on successful calls.
EXAMPLES
If a t_connect(3NSL) 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 to be printed would look like:
t_connect failed on fd2: incorrect addr format
where incorrect addr format identifies the specific error that
occurred, and t_connect failed on fd2 tells the user which function
failed on which transport endpoint.
RETURN VALUES
Upon completion, a value of 0 is returned.
VALID STATES
All - apart from T_UNINIT
ERRORS
No errors are defined for the t_error() function.
TLI COMPATIBILITY
The XTI and TLI interface definitions have common names but use differ‐
ent header files. This, and other semantic differences between the two
interfaces are described in the subsections below.
Interface Header
The XTI interfaces use the header file, xti.h. TLI interfaces should
not use this header. They should use the header:
#include <tiuser.h>
Error Description Values
The t_errno value that can be set by the XTI interface and cannot be
set by the TLI interface is:
TPROTO
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│MT Level │Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOt_errno(3NSL)strerror(3C), attributes(5)SunOS 5.10 7 May 1998 t_error(3NSL)
