Lua invokes shell script

In Lua, Os.execute can execute DOS commands, but returns the system status code, which is the default output.
Io.popen () can also execute DOS commands, but returns a file. eg

Copy the Code code as follows:
Local T = Io.popen (' svn help ')
Local A = T:read ("*all")
--a returns a string that contains the contents of the SVN help

If you want to execute a command or a program optional os.execute (), if you still want to capture the execution result available Io.popen ()
Eg: Copying files

Copy the Code code as follows:

Os.execute ("Copy": OriginalPath. "," .. Backuppath)

Test examples

Local t= io.popen (' ls-l ')
Local A = T:read ("*all")
Print (a)

Lua invokes shell script