0,0 → 1,100 |
/* |
* Copyright (c) 1990 The Regents of the University of California. |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms are permitted |
* provided that the above copyright notice and this paragraph are |
* duplicated in all such forms and that any documentation, |
* advertising materials, and other materials related to such |
* distribution and use acknowledge that the software was developed |
* by the University of California, Berkeley. The name of the |
* University may not be used to endorse or promote products derived |
* from this software without specific prior written permission. |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
*/ |
|
/* |
FUNCTION |
<<perror>>---print an error message on standard error |
|
INDEX |
perror |
INDEX |
_perror_r |
|
ANSI_SYNOPSIS |
#include <stdio.h> |
void perror(char *<[prefix]>); |
|
void _perror_r(struct _reent *<[reent]>, char *<[prefix]>); |
|
TRAD_SYNOPSIS |
#include <stdio.h> |
void perror(<[prefix]>) |
char *<[prefix]>; |
|
void _perror_r(<[reent]>, <[prefix]>) |
struct _reent *<[reent]>; |
char *<[prefix]>; |
|
DESCRIPTION |
Use <<perror>> to print (on standard error) an error message |
corresponding to the current value of the global variable <<errno>>. |
Unless you use <<NULL>> as the value of the argument <[prefix]>, the |
error message will begin with the string at <[prefix]>, followed by a |
colon and a space (<<: >>). The remainder of the error message is one |
of the strings described for <<strerror>>. |
|
The alternate function <<_perror_r>> is a reentrant version. The |
extra argument <[reent]> is a pointer to a reentrancy structure. |
|
RETURNS |
<<perror>> returns no result. |
|
PORTABILITY |
ANSI C requires <<perror>>, but the strings issued vary from one |
implementation to another. |
|
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
<<lseek>>, <<read>>, <<sbrk>>, <<write>>. |
*/ |
|
#include <_ansi.h> |
#include <reent.h> |
#include <stdio.h> |
#include <string.h> |
#include "local.h" |
|
_VOID |
_DEFUN(_perror_r, (ptr, s), |
struct _reent *ptr _AND |
_CONST char *s) |
{ |
char *error; |
int dummy; |
|
_REENT_SMALL_CHECK_INIT (ptr); |
if (s != NULL && *s != '\0') |
{ |
fputs (s, _stderr_r (ptr)); |
fputs (": ", _stderr_r (ptr)); |
} |
|
if ((error = _strerror_r (ptr, ptr->_errno, 1, &dummy)) != NULL) |
fputs (error, _stderr_r (ptr)); |
|
fputc ('\n', _stderr_r (ptr)); |
} |
|
#ifndef _REENT_ONLY |
|
_VOID |
_DEFUN(perror, (s), |
_CONST char *s) |
{ |
_perror_r (_REENT, s); |
} |
|
#endif |