NAME

       explain_flock_or_die - control advisory lock on open file and report errors

SYNOPSIS

       #include <libexplain/flock.h>
       void explain_flock_or_die(int fildes, int command);
       int explain_flock_on_error(int fildes, int command))

DESCRIPTION

       The  explain_flock_or_die function is used to call the flock(2) system call. On failure an
       explanation will be printed to stderr, obtained from the  explain_flock(3)  function,  and
       then the process terminates by calling exit(EXIT_FAILURE).

       The  explain_flock_on_error  function is used to call the flock(2) system call. On failure
       an explanation will be printed to stderr, obtained from the explain_flock(3) function, but
       still returns to the caller.

       fildes  The fildes, exactly as to be passed to the flock(2) system call.

       command The command, exactly as to be passed to the flock(2) system call.

RETURN VALUE

       The  explain_flock_or_die  function  only  returns  on  success,  see  flock(2)  for  more
       information. On failure, prints an explanation and exits, it does not return.

       The explain_flock_on_error function  always  returns  the  value  return  by  the  wrapped
       flock(2) system call.

EXAMPLE

       The  explain_flock_or_die  function  is  intended  to  be used in a fashion similar to the
       following example:
              explain_flock_or_die(fildes, command);

SEE ALSO

       flock(2)
               apply or remove an advisory lock on an open file

       explain_flock(3)
               explain flock(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2009 Peter Miller

                                                                          explain_flock_or_die(3)