| PERROR(3) | Library Functions Manual | PERROR(3) |
perror — write
error messages to standard error
#include
<stdio.h>
void
perror(const
char *string);
The
perror()
function looks up the error message string affiliated with an error number
and writes it, followed by a new-line, to the standard error stream.
If the argument string is not the
NULL pointer and is not zero length, it is prepended
to the message string and separated from it by a colon and a space
(‘: ’). Otherwise, only the
error message string is printed.
The contents of the error message string are the
same as those returned by
strerror()
with argument errno.
The perror() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
The perror() function first appeared in
Version 4 AT&T UNIX.
On systems other than OpenBSD, the
LC_MESSAGES
locale(1) category can cause
different strings to be printed instead of the normal error messages; see
CAVEATS in setlocale(3)
for details.
| May 16, 2019 | OpenBSD-6.9 |