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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [perror.c] - Rev 540
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/* * 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; _REENT_SMALL_CHECK_INIT (ptr); if (s != NULL && *s != '\0') { fputs (s, _stderr_r (ptr)); fputs (": ", _stderr_r (ptr)); } if ((error = strerror (ptr->_errno)) != 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
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