PERROR(3)

NAME
perror, _perror_r - print an error message on standard error

SYNOPSIS

#include <stdio.h>

void perror(char *prefix);

void _perror_r(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.

AUTHORS

Steve Chamberlain
    Author.

Roland Pesch
    Author.

Red Hat Support

Jeff Johnston
    Author.

COPYRIGHT

This file documents the ANSI C library.

Copyright (C) 1992, 1993, 1994-2014 Red Hat, Inc.

libc includes software developed by the University of California, Berkeley and its contributors.

libc includes software developed by Martin Jackson, Graham Haley and Steve Chamberlain of Tadpole Technology and released to Cygnus.

libc uses floating-point conversion software developed at AT&T, which includes this copyright information:

The author of this software is David M. Gay.

Copyright (c) 1991 by AT&T.

Permission to use, copy, modify, and distribute this software for any purpose without fee is hereby granted, provided that this entire notice is included in all copies of any software which is or includes a copy or modification of this software and in all copies of the supporting documentation for such software.

THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED WARRANTY. IN PARTICULAR, NEITHER THE AUTHOR NOR AT&T MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.

Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.

Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, subject to the terms of the GNU General Public License, which includes the provision that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.

Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions.