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Command: perror | Section: 3 | Source: OpenBSD | File: perror.3
PERROR(3) FreeBSD Library Functions Manual PERROR(3)
NAME
perror - write error messages to standard error
SYNOPSIS
#include <stdio.h>
void
perror(const char *string);
DESCRIPTION
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.
SEE ALSO
intro(2), psignal(3), setlocale(3), strerror(3)
STANDARDS
The perror() function conforms to ANSI X3.159-1989 ("ANSI C89").
HISTORY
The perror() function first appeared in Version 4 AT&T UNIX.
CAVEATS
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.
FreeBSD 14.1-RELEASE-p8 May 16, 2019 FreeBSD 14.1-RELEASE-p8