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ncat/scripts/conditional.lua
51 строка
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d33tah
Fix a typo.
04 сен 2013, 19:40
04 сен 2013, 19:40
fad24ba
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--This is another --lua-exec demo. It displays a menu to a user, waits for her --input and makes a decision according to what the user entered. All happens --in an infinite loop. --This function reads a line of at most 8096 bytes (or whatever the first --parameter says) from standard input. Returns the string and a boolean value --that is true if we hit the newline (defined as "\n") or false if the line had --to be truncated. This is here because io.stdin:read("*line") could lead to --memory exhaustion if we received gigabytes of characters with no newline. function read_line(max_len) local ret = "" for i = 1, (max_len or 8096) do local chr = io.read(1) if chr == "\n" then return ret, true end ret = ret .. chr end return ret, false end while true do print "Here's a menu for you: " print "1. Repeat the menu." print "0. Exit." io.write "Please enter your choice: " io.flush(io.stdout) i = read_line() --WARNING! Without this line, the script will go into an infinite loop --that keeps consuming system resources when the connection gets broken. --Ncat's subprocesses are NOT killed in this case! if i == nil then break end print("You wrote: ", i, ".") if i == "0" then break elseif i == "1" then print "As you wish." else print "No idea what you meant. Please try again." end print() --print a newline end