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man pages section 3: Basic Library Functions

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Updated: Wednesday, July 27, 2022



t_strerror - produce an error message string


#include <xti.h> 

const char *t_strerror(int errnum);


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_strerror() function maps the error number in errnum that corresponds to an XTI error to a language-dependent error message string and returns a pointer to the string. The string pointed to will not be modified by the program, but may be overwritten by a subsequent call to the t_strerror function. The string is not terminated by a newline character. The language for error message strings written by t_strerror() 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 following the t_errno codes defined in <xti.h>. If an error code is unknown, and the language is English, t_strerror() returns the string:

"<error>: error unknown"

where <error> is the error number supplied as input. In other languages, an equivalent text is provided.


ALL - apart from T_UNINIT.

Return Values

The function t_strerror() returns a pointer to the generated message string.


The XTI and TLI interface definitions have common names but use different 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>


See attributes(7) for descriptions of the following attributes:

MT Level

See Also

t_errno(3C), t_error(3C), attributes(7)