perror(3C)             UNIX System V(C Development Set)              perror(3C)


NAME
      perror - print system error messages

SYNOPSIS
      #include <stdio.h>

      void perror (const char *s);

DESCRIPTION
      perror produces a message on the standard error output (file descriptor
      2), describing the last error encountered during a call to a system or
      library function.  The argument string s is printed first, then a colon
      and a blank, then the message and a newline.  (However, if s is a null
      pointer or points to a null string, the colon is not printed.)  To be of
      most use, the argument string should include the name of the program that
      incurred the error.  The error number is taken from the external variable
      errno, which is set when errors occur but not cleared when non-erroneous
      calls are made.

SEE ALSO
      intro(2), fmtmsg(3C), strerror(3C).

































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