perror(3) Library Functions Manual perror(3)
NAME
perror - Writes a message explaining the current setting of errno
LIBRARY
Standard C Library (libc.a, libc.so)
SYNOPSIS
#include <stdio.h>
void perror(
const char *string);
STANDARDS
Interfaces documented on this reference page conform to industry standards 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
newline 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).
RELATED INFORMATION
Routines: printf(3), strerror(3)
Standards: standards(5) delim off
perror(3)
