perror(3)perror(3)NAMEperror - Write a message explaining the current setting of errno
SYNOPSIS
#include <stdio.h>
void perror(
const char *string );
LIBRARY
Standard C Library (libc)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
perror(): ISO C, POSIX.1, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
Points to a string containing the name of the program that caused the
error.
DESCRIPTION
The perror() function writes a message on the standard error stream
that describes the current setting of the external variable errno. The
error message includes the string pointed to by the string parameter,
followed by a : (colon), a blank, the system message string, and a new‐
line character. The string parameter string should point to the name of
the program that caused the error.
To get the system error message string for use by a program, as opposed
to displaying it on standard error, use the strerror() function. For
more information, see strerror(3).
SEE ALSO
Routines: printf(3), strerror(3)
Standards: standards(5)perror(3)