$ cat fileio.lua
while 1 do
local s=io.read()
if s == nil then break end
print(s)
end
You can run like this:
$ lua fileio.lua </etc/passwd
I will explain.
The outer loop is a simple while(1) loop which we have seen in C.
The local keyword is just an access specifier. You can omit it.
Lua is a scripting language, so you don't have to declare variables
and you don't
have to use the same type also.
s=io.read() reads the STDIN into the s buffer. You can manipulate the data in s
using the string library or the other facilities.
The if s== nil line is used to look for end of file(EOF) marker.
The print(s) line prints the lines with newline marker.
The io.write(s) which I used did not print newlines.
$ lua fileio.lua </etc/passwd > /tmp/pass
$ sha1 /etc/passwd /tmp/pass
Do you see?
-Girish
--
Gayatri Hitech
http://gayatri-hitech.com
