[Lua5.1] popen and exit code
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- Subject: [Lua5.1] popen and exit code
- From: jseb <gmane2010@...>
- Date: 2012年1月06日 16:56:34 +0100
Hello,
I'd like to get exit code from shell commands executed with «popen».
According to this, it's possible:
http://www.luafaq.org/#T8.2.8
The «close» should return the exit code.
Fine, but there's two problems
#1 : the code returned is a boolean (i thought it would be an integer)
#2 : this boolean is always set to «true», whatever success of command
shell is.
Here is my try:
#!/usr/bin/env lua
function shell (cmd)
local f = io.popen (cmd, 'r')
local buffer = f.read (f,'*a')
local exit_code = f.close(f)
return buffer, exit_code
end
buffer, exit_code = shell ("imsurethiscommandisinvalid")
if (exit_code==true) then
io.write ("ERROR\n")
else
print (buffer)
end
Thank you.