Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/patch-okay-colon/okay
#!/bin/rc rfork e if(! ~ $#* 1){ echo usage: patch/okay dir >[1=2] exit usage } i=$1 if(! test -s $i/files || ! test -s $i/readme) exit 'missing files' if(grep -v '^/[_a-zA-Z0-9.\-+/:]+ [_a-zA-Z0-9.\-+:]+$' $i/files) exit 'bad file list' exit 0