/* strerror.c - string error, string *//* Copyright 1992-2001 Wind River Systems, Inc. *//*modification history--------------------01e,16oct01,jn   use symFindSymbol for symbol lookup (SPR #7453)01d,25feb93,jdi  documentation cleanup for 5.1.01c,30nov92,jdi  fixed doc for strerror() - SPR 1825.01b,20sep92,smb  documentation additions01a,08jul92,smb  written and documented.*//*DESCRIPTIONINCLUDE FILES: string.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "string.h"#include "errno.h"#include "symLib.h"#include "limits.h"#include "stdio.h"#include "sysSymTbl.h"#include "private/funcBindP.h"/* forward declarations */LOCAL STATUS strerrorIf (int errcode, char *buf);/********************************************************************************* strerror_r - map an error number to an error string ** This routine maps the error number in <errcode> to an error message string.* It stores the error string in <buffer>.  The size of <buffer> should be * NAME_MAX + 1 - using a smaller buffer may lead to stack corruption.  NAME_MAX * is defined in limits.h.** This routine is the reentrant version of strerror().** INCLUDE FILES: string.h** RETURNS: OK or ERROR.** SEE ALSO: strerror()*/STATUS strerror_r     (    int    errcode,	/* error code */    char * buffer	/* string buffer */    )    {    return (strerrorIf (errcode, buffer));    }/********************************************************************************* strerror - map an error number to an error string (ANSI)** This routine maps the error number in <errcode> to an error message string.* It returns a pointer to a static buffer that holds the error string.** INCLUDE: string.h** RETURNS: A pointer to the buffer that holds the error string.** SEE ALSO: strerror_r()*/char * strerror    (    int errcode		/* error code */    )    {    static char buffer [NAME_MAX+1]; /* NAME_MAX doesn't count the EOS. */    (void) strerror_r (errcode, buffer);    return (buffer);    }/********************************************************************************* strerrorIf - interface from libc to VxWorks for strerror_r** RETURNS: OK, or ERROR if <buf> is null.* NOMANUAL*/LOCAL STATUS strerrorIf     (    int   errcode,		/* error code */    char *buf			/* string buffer */    )    {    void *	value;    char *	statName;    SYMBOL_ID   symId;    if (buf == NULL)	return (ERROR);    if (errcode == 0)	{        strcpy (buf, "OK");	return (OK);	}    /*      * Only check one symLib function pointer (for performance's sake).      * All symLib functions are provided by the same library, by convention.         */    if ((_func_symFindSymbol != (FUNCPTR) NULL) && 	(statSymTbl != NULL))	{	(* _func_symFindSymbol) (statSymTbl, NULL, (void *)errcode, 				 SYM_MASK_NONE, SYM_MASK_NONE, &symId);	(* _func_symNameGet) (symId, &statName);	(* _func_symValueGet) (symId, &value);	if (value == (void *)errcode)	    {	    strncpy (buf, statName, NAME_MAX+1);	    return (OK);	    }	}    sprintf (buf, "errno = %#x", errcode);    return (OK);    }