#: 20692 S12/OS9/68000 (OSK)
    08-Jan-95  16:56:04
Sb: #20688-#unix functions
Fm: Bud Hamblen 72466,256
To: LARRY OLSON 72227,3467 (X)

Bob,

Here's what "man flock" produced on my LINUX box:

    FLOCK(2)            Linux Programmer's Manual                FLOCK(2)


    NAME
           flock - apply or remove an advisory lock on an open file

    SYNOPSIS
           #include 

           int flock(int fd, int operation)

    DESCRIPTION
           Apply  or  remove  an  advisory lock on an open file.  The
           file is specified  by  fd.   Valid  operations  are  given
           below:


                  LOCK_SH   Shared lock.  More than one process may
                            hold a shared lock for a given file at a
                            given time.

                  LOCK_EX   Exclusive  lock.   Only  one  process may
                            hold an exclusive lock for a  given  file
                            at a given time.

                  LOCK_UN   Unlock.

                  LOCK_NB   Don't  block when locking.  May be speci-
                            fied (by or'ing) along with  one  of  the
                            other operations.


           A  single file may not simultaneously have both shared and
           exclusive locks.

           A file is locked (i.e., the inode), not the file descrip-
           tor.   So,  dup(2)  and fork(2) do  not  create multiple
           instances of a lock.

    RETURN VALUE
           On success, zero is returned.  On error, -1  is returned,
           and errno is set appropriately.

    ERRORS
           EWOULDBLOCK
                  The   file  is  locked  and  the  LOCK_NB flag  was
                  selected.

    NOTES
           Under Linux, flock is implemented  as  a  call  to  fcntl.
           Please see fcntl(2) for more details on errors.

    SEE ALSO
           open(2), close(2), dup(2), execve(2), fcntl(2), fork(2),

    Linux 0.99.11                22 July 19

I guess _ss_lock() for Mircoware C 3.2 or _os_ss_lock() for Ultra C would be
the nearest OS-9/68000 equivalnets.

"Man lockf" produced nothing.

Bud

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