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 1.4
       Copyright (C) 2009 Peter Miller

                                                                                         explain_flock_or_die(3)