How to run an executable and get its return value in LUA?-CodePudding

I'm trying to run an executable using os.execute(), however, I need to know its exit value, whether it's 0 or something else. Any advice?

CodePudding user response：

In Lua 5.2 , os.execute returns three values: success, reason, code. You want code when reason is "exit".

CodePudding user response：

You can use one of the three returns of os.execute() to conditionally decide what to do.
This example demonstrate it in a do end block in an interactive Lua console session...

$ /usr/local/bin/lua
Lua 5.4.3  Copyright (C) 1994-2021 Lua.org, PUC-Rio
> do local bool, stat, rc = os.execute('false') if bool then return rc else return rc end end
1 -- From: else return rc
> do local bool, stat, rc = os.execute('true') if bool then return rc else return rc end end
0 -- From: then return rc