O'Reilly logo

Using Samba, Second Edition by David Collier-Brown, Robert Eckstein, Jay Ts

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Connection Scripts

Samba supports a mechanism called connection scripts, by which commands can be executed on the server as clients connect to a share or later disconnect from it. By using configuration file variables along with some custom programming, you can create connection scripts that perform a wide range of functions. As a simple example, here is a “quick and dirty” way to monitor connections to shares on the Samba server in real time. First, the value of the preexec parameter is set as follows:

[global]
    preexec = /bin/echo %u at %m connected to //%L/%S on %T >>/tmp/smblog

This causes information about the user and the connection to be written to the file /tmp/smblog whenever any client connects to any share. To watch clients connect, run the following command:

$ tail -f /tmp/smblog
jay at maya connected to //toltec/data on 2002/11/21 21:21:15
david at apache connected to //toltec/techs on 2002/11/21 21:21:57
sally at seminole connected to //toltec/payroll on 2002/11/21 21:22:16
martha at dine connected to //toltec/profiles on 2002/11/21 21:23:38
martha at dine connected to //toltec/netlogon on 2002/11/21 21:23:39
martha at dine connected to //toltec/martha on 2002/11/21 21:23:40
aaron at huastec connected to //toltec/netlogon on 2002/11/21 21:24:19
aaron at huastec connected to //toltec/aaron on 2002/11/21 21:24:20

With the -f option, the tail command monitors /tmp/smblog and prints additional output as new data is appended to the file. Every time a new connection is made, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required