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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
  string    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)