There: > {1} With grep you need at least something to search (one argument), don't you? {2} If you don't provide another argument to say "where", it reads from

There: > {1} With grep you need at least something to search (one argument), don't you? {2} If you don't provide another argument to say "where", it reads from standard input (as most unix commands). And ‘find’ is the other way around. I just don't see any reason to not to use cat. It's not like grep will use fseek() to speed anything up, if I call it with file URI instead.