clamav-daemon fails to load due to memory; any way to run clamscan on demand for attachments?

Hi,

I’m using a 512MB Debian droplet, and I currently have about 280MB free:

| total | used | free | shared | buffers | cached ------------- | ------------- | ------------- | ------------- | ------------- | ------------- | ------------- Mem: | 497 | 209 | 287 | 0 | 1 | 84

When I run clamav-daemon, I end up with this error:

tail -f /var/log/clamav/clamav.log Wed Feb 11 01:31:00 2015 -> clamd daemon 0.98.5 (OS: linux-gnu, ARCH: x86_64, CPU: x86_64) Wed Feb 11 01:31:00 2015 -> Log file size limited to 10485760bytes. Wed Feb 11 01:31:00 2015 -> Reading databases from /var/lib/clamav Wed Feb 11 01:31:00 2015 -> Not loading PUA signatures. Wed Feb 11 01:31:00 2015 -> Bytecode: Security mode set to "TrustSigned". Wed Feb 11 01:31:10 2015 -> Loaded 3741717 signatures. Wed Feb 11 01:31:11 2015 -> LOCAL: Unix socket file /tmp/clamd.socket Wed Feb 11 01:31:11 2015 -> LOCAL: Setting connection queue length to 30 Wed Feb 11 01:31:11 2015 -> ERROR: daemonize() failed: Cannot allocate memory Wed Feb 11 01:31:11 2015 -> Socket file removed.

As a result, I’m guessing my droplet just isn’t powerful enough to have clamav running as a daemon all the time. So, I would prefer to have it scan on demand, once per day, and scan each attachment as it comes in. I plan to use exim4. Is this possible?