perror(3C)                                                          perror(3C)


NAME
     perror, errno - print system error messages

SYNOPSIS
     #include <stdio.h>

     void perror (const char *s);

     #include <errno.h>

     extern int errno;

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), oserror(3C).

NOTE
     Code using sys_errlist, and _sys_errlist directly will not be able to
     display any errno greater than 152.


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