perror

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NAME

       perror - print a system error message


SYNOPSIS

       #include <stdio.h>

       void perror(const char *s);


DESCRIPTION

       perror  produces  a  message on the standard error output,
       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  new-line.   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 vari-
       able errno, which is set when errors occur but not cleared
       when non-erroneous calls are made.


CONFORMING TO

       ANSI C, POSIX


SEE ALSO

       errno(2), strerror(3)
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