From: David Ross <drossruby@...>
Date: 2004-08-03T23:45:50+09:00
Subject: Re: help from *nix ruby users



The output is from my DragonFlyBSD systems. It is the
same in FreeBSD4.x


> ruby -r rbconfig -e 'p Config::CONFIG["arch"]'
"i386-dragonfly1.1"


struct flock {
        off_t   l_start;        /* starting offset */
        off_t   l_len;          /* len = 0 means until
end of file */
        pid_t   l_pid;          /* lock owner */
        short   l_type;         /* lock type:
read/write, etc. */
        short   l_whence;       /* type of l_start */
};




--- "Ara.T.Howard" <Ara.T.Howard@noaa.gov> wrote:

> 
> i have a bit of code that packs an flock struct
> 
>    struct flock {
>       ...
>       short l_type;    /* Type of lock: F_RDLCK,
>                           F_WRLCK, F_UNLCK */
>       short l_whence;  /* How to interpret l_start:
>                           SEEK_SET, SEEK_CUR,
> SEEK_END */
>       off_t l_start;   /* Starting offset for lock
> */
>       off_t l_len;     /* Number of bytes to lock */
>       pid_t l_pid;     /* PID of process blocking
> our lock
>                           (F_GETLK only) */
>       ...
>    };
> 
> using 'ssqqi' (thanks to matz for this tip).  this
> works for linux, but i'm
> sure it won't for other *nixes with different flock
> layouts.  if i understand
> ruby dl there is no way to portably set the fields
> of a struct unless you
> already know it's layout, so packing is just as good
> in this case (please
> correct me if i'm wrong).  what i'm asking for
> people on various *nixes to
> post their struct flock definitions so i can add
> appropriate pack templates
> for those.
> 
> this output of
> 
>    ruby -r rbconfig -e 'p Config::CONFIG["arch"]'
> 
> would also be useful
> 
> if there is an easier way to do this - some online
> resource where i could find
> this info - please let me know
> 
> thanks alot.
> 
> -a
> --
>
===============================================================================
> | EMAIL   :: Ara [dot] T [dot] Howard [at] noaa
> [dot] gov
> | PHONE   :: 303.497.6469
> | A flower falls, even though we love it;
> | and a weed grows, even though we do not love it. 
> |   --Dogen
>
===============================================================================
> 
> 



		
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