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/*
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* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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* FUNCTION
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* <<perror>>---print an error message on standard error
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* INDEX
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* perror
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* INDEX
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* _perror_r
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* ANSI_SYNOPSIS
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* #include <stdio.h>
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* void perror(char *<[prefix]>);
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* void _perror_r(void *<[reent]>, char *<[prefix]>);
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* TRAD_SYNOPSIS
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* #include <stdio.h>
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* void perror(<[prefix]>)
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* char *<[prefix]>;
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* void _perror_r(<[reent]>, <[prefix]>)
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* char *<[reent]>;
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* char *<[prefix]>;
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* Use <<perror>> to print (on standard error) an error message
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* corresponding to the current value of the global variable <<errno>>.
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* Unless you use <<NULL>> as the value of the argument <[prefix]>, the
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* error message will begin with the string at <[prefix]>, followed by a
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* colon and a space (<<: >>). The remainder of the error message is one
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* of the strings described for <<strerror>>.
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* The alternate function <<_perror_r>> is a reentrant version. The
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* extra argument <[reent]> is a pointer to a reentrancy structure.
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* RETURNS
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* <<perror>> returns no result.
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* PORTABILITY
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* ANSI C requires <<perror>>, but the strings issued vary from one
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* implementation to another.
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* Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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* <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*
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*
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*/
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#include <stddef.h>
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#include <stdio_r.h>
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#include <string.h>
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/**
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A reentrant version of perror().
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*/
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EXPORT_C void
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_perror_r (struct _reent *ptr, const char *s)
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{
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char *error;
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FILE *efp = _stderr_r(ptr);
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if (s != NULL && *s != '\0')
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{
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fputs (s, efp);
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fputs (": ", efp);
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}
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error = strerror (ptr->_errno);
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if (*error == '\0')
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fprintf (efp, "error %d\n", ptr->_errno);
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else
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{
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fputs (error, efp);
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fputc ('\n', efp);
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}
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}
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#ifndef _REENT_ONLY
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EXPORT_C void
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perror (const char *s)
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{
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_perror_r (_REENT, s);
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}
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#endif
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