/usr/share/EMBOSS/test/memtest/purify.csh is in emboss-test 6.4.0-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #!/bin/csh
setenv EMBOSSRC ../
setenv EMBOSS_OUTDIRECTORY purify
../../scripts/purify.pl -all
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