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