tsort(1) on OpenBSD
The text 79e2eb316625, as OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3, OpenBSD 6.2, OpenBSD 6.1, OpenBSD 6.0, OpenBSD 5.9, OpenBSD 5.8, OpenBSD 5.7, OpenBSD 5.6, OpenBSD 5.5, OpenBSD 5.4, OpenBSD 5.3, OpenBSD 5.2 shipped it.
topological sort of a directed graph
Flags it lists
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-f -
-h -
-l -
-q -
-r -
-v -
-w