PERROR(3)

NAME
4.43 `perror'--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'.

SEE ALSO
perror is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.