I have managed to add md5 summing with only a 2808 byte increase. I am implementing it as a --md5sum flag to 'dd', with a script: #!/bin/sh [ $# -gt 0 ] && exec 0<$1 dd -q --md5sum >/dev/null called md5sum in /usr/bin. Obviously a little work with the script would be needed to give the exact behaviour of the gnu- md5sum, but it is close enough for a start. I used the Deutsch/Alladin md5.c. -Tom
