gammu-smsd - SMS daemon for Gammu
This manual page documents briefly the gammu-smsd
is a program that periodically scans GSM modem for received
messages, stores them in defined storage and also sends messages enqueued in
The daemon can reload configuration file after sending hangup signal (SIGHUP)
and properly terminates itself on SIGINT and SIGTERM.
Program accepts following options (please note that long options might be not
accepted on some platforms):
- -v, --version
- Shows version information and compiled in features.
- -c, --config=file
- Configuration file to use, default is /etc/gammu-smsdrc, on
Windows there is no default and configuration file path has to be always
If you run SMSD as a system daemon (or service), it is recommended to use
absolute path to configuration file as startup directory might be
different than you expect.
See gammu-smsdrc for configuration file documentation.
- -p, --pid=file
- Lock file for storing pid, empty for no locking. Not
supported on Windows.
- -U, --user=user
- Drop daemon privileges to chosen user after starting.
- -G, --group=group
- Drop daemon privileges to chosen group after starting.
- -d, --daemon
- Daemonize program on startup. Not supported on
- -i, --install-service
- Installs SMSD as a Windows service.
- -u, --uninstall-service
- Uninstalls SMSD as a Windows service.
- -s, --start-service
- Starts SMSD Windows service.
- -k, --stop-service
- Stops SMSD Windows service.
- -f, --max-failures=count
- Terminate after defined number of failures. Use 0 to not
terminate (this is default).
- -X, --suicide=seconds
- Kills itself after number of seconds.
- -S, --run-service
- Runs pogram as SMSD Windows service. This should not be
used manually, but only Windows Service manager should use this
- -n, --service-name=name
- Defines name of a Windows service. Each service requires an
unique name, so if you want to run several SMSD instances, you have to
name each service differently. Default is “GammuSMSD”.
- -l, --use-log
- Use logging as configured in config file (default).
- -L, --no-use-log
- Do not use logging as configured in config file.
- -e, --install-event-log
- Installs Windows EventLog description to registry.
New in version 1.31.90.
- -E, --uninstall-event-log
- Uninstalls Windows EventLog description to registry.
New in version 1.31.90.
SMSD can be controlled using following POSIX signals (if your platform supports
- Reload configuration and reconnect to phone.
- SIGINT, SIGTERM
- Gracefully shutdown the daemon.
- Used internally for gammu-smsd -X
- Suspends SMSD operation, closing connection to phone and
- Resumes SMSD operation (after previous suspend).
Changed in version 1.22.91: Added support for SIGHUP.
Changed in version 1.22.95: Added support for SIGALRM.
Changed in version 1.31.90: Added support for SIGUSR1 and SIGUSR2.
Start SMSD as a daemon on Linux:
gammu-smsd --config /etc/gammu-smsdrc --pid /var/run/gammu-smsd.pid --daemon
Start SMSD as a daemon on Linux with reduced privileges:
gammu-smsd --config /etc/gammu-smsdrc --pid /var/run/gammu-smsd.pid --daemon --user gammu --group gammu
To use SMSD as a daemon, you might want to use init script which is shipped with
Gammu in contrib/init directory. It is not installed by default, either
install it manually or check INSTALL file for instructions.
Under Windows 7 you might need to disable UAC (user account control) before you
will be able to install SMSD service.
Install Gammu SMSD Windows service:
gammu-smsd.exe -c c:\Gammu\smsdrc -i
Install two instances of SMSD Windows service:
gammu-smsd.exe -c c:\Gammu\smsdrc-1 -n Gammu-first-phone -i
gammu-smsd.exe -c c:\Gammu\smsdrc-2 -n Gammu-second-phone -i
To uninstall a Windows service:
If Gammu fails to start as a Windows service (you will usually get “Error
1053: The service did not respond to the start or control request in a timely
fashion”), first check your SMSD logs. If they do not contain any
useful hint, try starting SMSD manually with exactly same parameters as you
installed the service (without -i).
For example the command line can look like:
You now should be able to get errors from SMSD even if it fails to start as a
As you can not run Gammu and Gammu SMSD at same time on signle device, you can
workaround this limitation by suspending SMSD temporarily using SIGUSR1
signals (see also Signals
if [ -z "$SMSD_PID" ] ; then
echo "Failed to figure out SMSD PID!"
kill -SIGUSR1 $SMSD_PID
kill -SIGUSR2 $SMSD_PID
Or even create a gammu-safe
You can not use same phone by more programs in same time. However in case you
did not enable locking in [gammu]
section, it might be able to start
the communication with phone from more programs. In this case neither of the
programs will probably work, see Invoking Gammu and suspending SMSD
There is no way to detect that SMS message is reply to another by looking at
message headers. The only way to achieve this is to add some token to the
message and let the user include it in the message on reply.
Michal Čihař <email@example.com>
2009-2015, Michal Čihař <firstname.lastname@example.org>