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strerror(3)

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NAME    [Toc]    [Back]

       strerror,  strerror_r - Access message explaining function
       error

SYNOPSIS    [Toc]    [Back]

       #include <string.h>

       char *strerror(
               int errnum );

       The following function does not conform to  current  standards
  and is supported only to maintain backward compatibility.
  int strerror_r(
               int errnum,
               char *strerrbuf,
               int buflen );

LIBRARY    [Toc]    [Back]

       Standard C Library (libc)

STANDARDS    [Toc]    [Back]

       Interfaces documented on this reference  page  conform  to
       industry standards as follows:

       strerror():  XSH4.2

       Refer to the standards(5) reference page for more information
 about industry standards and associated tags.

PARAMETERS    [Toc]    [Back]

       Specifies an error-number value.  [Tru64  UNIX]  Specifies
       a  buffer  that  will  hold  the  error  message.   [Tru64
       UNIX]  Specifies the length of the buffer.

DESCRIPTION    [Toc]    [Back]

       The strerror() function maps the error number specified by
       the errnum parameter to a error message string and returns
       a pointer to the string. The  string  pointed  to  by  the
       return  value  is  not modified by the program, but may be
       overwritten by a subsequent call  to  this  function.  The
       implementation  behaves  as though no other function calls
       the strerror() function.

       If a library message catalog is available for the  current
       locale,  the  strerror()  function stores the message from
       that catalog. Otherwise, it uses the default messages. The
       LC_MESSAGES category in the setlocale() call specifies the
       message catalog  language,  and  the  NLSPATH  environment
       variable  specifies  the directory search path for message
       catalogs.

       The strerror_r() function is the reentrant version of  the
       strerror()  function. It is supported to maintain backward
       compatibility with  operating  system  versions  prior  to
       Tru64 UNIX Version 4.0.







RETURN VALUES    [Toc]    [Back]

       On  successful completion, the strerror() function returns
       a pointer to the generated message string.  If  the  error
       number is not valid, errno is set to indicate the error.

       On  successful completion, strerror_r() provides the error
       message in strerrbuf, and returns a  value  of  0  (zero).
       Otherwise it returns a value of -1.

ERRORS    [Toc]    [Back]

       The strerror() and strerror_r() functions set errno to the
       specified values for the following conditions:

       The errnum parameter is an invalid error number.

              [Tru64 UNIX]  The strerrorbuf  is  inaccessible  to
              the  strerror_r()  function.  Note  that  the  strerror_r()
 function truncates the error  message  if
              strerrbuf is too small.

SEE ALSO    [Toc]    [Back]

      
      
       Functions:  intro(2),  catgets(3),  catopen(3), perror(3),
       setlocale(3)

       Standards: standards(5)



                                                      strerror(3)
[ Back ]
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