This is the command cpif that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
cpif - selectively update files
cpif [-eq|-ne] file ...
cpif is an auxiliary tool for use with notangle(1) and make(1). cpif compares its
standard input to each of the named files, overwriting the file if the comparison succeeds
or if the named file does not exist. If neither -eq or -ne is specified, the default is
-ne. Typical usage is in the following default rule, suitable for use in a Makefile.
.nw.h: ; notangle -Rheader $*.nw | cpif $*.h
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