forgot to commit openos

data/openos/bin/man.lua

@@ -0,0 +1,20 @@
+local fs = require("filesystem")
+local shell = require("shell")
+
+local args = shell.parse(...)
+if #args == 0 then
+  io.write("Usage: man <topic>\n")
+  io.write("Where `topic` will usually be the name of a program or library.\n")
+  return 1
+end
+
+local topic = args[1]
+for path in string.gmatch(os.getenv("MANPATH"), "[^:]+") do
+  path = shell.resolve(fs.concat(path, topic), "man")
+  if path and fs.exists(path) and not fs.isDirectory(path) then
+    os.execute(os.getenv("PAGER") .. " " .. path)
+    os.exit()
+  end
+end
+io.stderr:write("No manual entry for " .. topic .. '\n')
+return 1