12-29-2009
It's not quite that simple. A trigger in a RDBMS is executed as soon as it registers a certain event (row update/insert/..., ...). What the RDBMS is for a database is the filesystem for a file, but I know of no system where it can trigger an executable. So you'll have to find a different approach.
One option might be cron. The limitation with cron is that it's resolution is one minute max, meaning your file would be copied with a maximum delay of 1 minute. If that's enough for you, fine, if not we'll have to find something different.
Another option might be to create a small daemon (like sendmail or cron) that watches a certain directory and copies any file that hasn't changed it's size during the last 2 seconds.
Or, third option, you have some kind of log file what registers when a file starts uploading, and when the upload finished. As soon as it's done start the copy process. Basically a variation of the above.
Finally, if your web page can register an finished upload, use it to start the upload via system() or something similar.
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refile(1) General Commands Manual refile(1)
NAME
refile - file message in other folders (only available within the message handling system, mh)
SYNOPSIS
refile [msgs] [+folder] [options]
OPTIONS
Refiles the draft message, or the current message in your +drafts folder, if you have one set up. You cannot give a msgs argument when you
use this option. Moves a file into a folder. This option takes a file from its directory and places it in the named folder, as the next
message in the folder. The file must be formatted as a legal mail message. This means that the message must have the minimum header fields
separated from the body of the message by a blank line or a line of dashes. Prints a list of the valid options to this command. Keeps a
copy of the message in the source folder. Normally, refile removes the messages from the original folder when it refiles them. The -link
option keeps a copy in the original folder, as well as filing a copy in the new folder. Preserves the number of a message in the new
folder. Normally, when a message is refiled in to another folder, it is set to the next available number in that folder. The -preserve
option keeps the number of the message the same in the new folder as it had been in the old.
You cannot have two messages with the same number in one folder, so you should use this option with care. Specifies the source
folder to take messages from. Normally, messages are refiled from the current folder into another folder. However, you can take mes-
sages from a different folder by using the -src +folder option to specify the alternative source folder.
DESCRIPTION
Use the refile command to move the specified message from the current folder to another folder. You can refile messages in more than one
folder by giving multiple folder names as arguments.
If you do not specify a message, the current message is refiled. You can refile a message other than the current message by giving its num-
ber as a msgs argument. You can also refile more than one message at a time by specifying more than one message number, or a range of mes-
sage numbers, or a message sequence. See mark(1) for more information on sequences.
The current folder remains the same unless the -src option is specified; in that case, the source folder becomes current. Normally, the
last message specified becomes the current message. However, if the -link option is used, the current message is not changed.
If the Previous-Sequence: entry is set in the file, in addition to defining the named sequences from the source folder, refile will also
define those sequences for the destination folders. See mh_profile(4) for information concerning the previous sequence.
PROFILE COMPONENTS
Path: To determine your Mail directory
Folder-Protect: To set protections when creating a new folder
rmmproc: Program to delete the message
EXAMPLES
The following example refiles messages 3 and 5 in the folder +records: % refile 3 5 +records The next example files the current message
into two folders: % refile +jones +map The next example takes message 13 in the current folder and refiles it in the +test folder. The mes-
sage remains in the current folder as well as appearing in the +test folder. % refile -link 13 +test The next example takes a message from
the folder +test when it is not the current folder, and places it in the folder +outbox: % refile 3 -src +test +outbox
FILES
The user profile.
SEE ALSO
folder(1), mark(1), mh_profile(4)
refile(1)