[ Snip ]
> There are some functions that I would like to see in maildrop's
> filtering language, and I'm wondering how you folks feel about me
> writing these functions and then supplying patches for maildrop?
>
> If there is enough interest in this, I will start work on this right
> away in my spare time. I would then have a prototype ready within a
> week or so.
>
> The following group of functions are intended to replace the
> following type of construct:
>
> INVOKE=`/bin/test -f $FILE 1>/dev/null 2>&1`
> if ( $RETURNCODE != 0 )
> {
> ... etc. ...
> }
>
> The following alternative functions avoid the overhead of forking a
> subprocess, setting up a pipe to capture its output, and then
> discarding the output once the command finishes ... all to simply
> query the process's return code for a true/false value that could be
> gotten much more quickly and easily via a system library function,
> and in some cases, to get a simple side-effect.
Plus, the `cmd` structure is unavailable in embedded mode!
> isfile(item)
> returns 1 if the named item is an existing file;
> otherwise returns 0
>
> isdir(item)
> returns 1 if the named item is an existing directory;
> otherwise returns 0
>
> isreadable(item)
> returns 1 if the named item is an existing and readable
> file or directory; otherwise returns 0
>
> iswritable(item)
> returns 1 if the named item is an existing and writable
> file or directory; otherwise returns 0
>
> isexecutable(item)
> returns 1 if the named item is an existing and executable
> file, or a directory into which it is possible to cd;
> otherwise returns 0
These are, I think, benign in embedded mode.
> unlink(file)
> tries to remove the file; returns 1 if successful,
> otherwise 0
>
> rename(old, new)
> tries to rename the old item to have the new name;
> has the same semantics as the Unix rename function;
> returns 1 on success, otherwise 0
>
> rmdir(dir)
> tries to remove the directory; has the same semantics
> as the Unix library function in that it will only
> remove an empty directory; returns 1 if successful,
> otherwise 0
>
> mkdir(dir, mode)
> tries to make an empty directory; has the same
> semantics as the Unix library function in that the
> you have to specify the mode of the directory that's
> going to be created; returns 1 if successful, otherwise 0
These are, I think, not benign, so should be prohibited in embedded mode.
Malc.
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