Triggering a script using POSTFIX.... Post: 302995319

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Top Forums Shell Programming and Scripting Triggering a script using POSTFIX.... Post 302995319 by davidbob on Tuesday 4th of April 2017 11:52:28 AM

04-04-2017

Registered User

Quote:

Originally Posted by drysdalk

Hi,

This is possible, yes. I've done it myself in the past when this has been absolutely the only way I could remotely trigger something on a system (i.e. when SMTP was the only port a server could take incoming connections on, and so I had to use it as a crude job control method). It's not ideal, and you have to be absolutely sure that things are as locked-down security-wise as you can make them to eliminate this being a potential security hole, but if you really have to/need to, this is do-able.

I did it by having an entry in /etc/aliases for the SMTP username that then forwarded into a local pipe to my script.

So an entry like this in /etc/aliases

Code:

scriptuser: "|/usr/bin/sudo /usr/local/bin/script.sh"

would pipe the full body of any e-mail received for the mailbox scriptuser into the script /usr/local/bin/script.sh, in this instance running it via sudo as well (assuming the script needs root access).

As I say, it's a crude method and you need to be as close to 100% sure as you can be that your script does every possible kind of sanity checking and input sanitising that you can think of. But it should work for you - it certainly has for me in the past, when I've had no other choice but to go down that road.

Man!! Thank you so much for taking time to reply to my question! I really appreciate it my friend. You have no idea, how happy I am to have someone give me some leads to do this.

Now, just to give an insight of what I am doing,
I have OpenLDAP, I have created a script for adding user in it and the script is interactive, it asks for first name, lastname , email id, server name on which access is needed and Group name.

I have to manually enter all these details EVERYDAY!! sometime as many as 25 requests...

I got tired of doing it manually, so I was thinking about it.

May I know, after you sent the mail to your server, and you had already configured the aliases...

A : How did you make the script take these inputs?

I am new to scripting, this is my 1st script!! LOL

So, yes I am a script kiddie,

B: The server is on AWS (so can i not implement some kind of a security for incoming mails?)

davidbob

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)