modules/admin-mini: add missing ltn12_popen()

diff --git a/modules/admin-mini/luasrc/controller/mini/system.lua b/modules/admin-mini/luasrc/controller/mini/system.lua
index 44d0688f6dcfcd4ad9d2d074b87ddc4c42182749..e562af0283f53fb13aa011b79e50a6fb49c7ddb1 100644 (file)
--- a/modules/admin-mini/luasrc/controller/mini/system.lua
+++ b/modules/admin-mini/luasrc/controller/mini/system.lua
@@ -218,3 +218,33 @@ function _keep_pattern()
        end
        return kpattern
 end
+
+function ltn12_popen(command)
+
+       local fdi, fdo = nixio.pipe()
+       local pid = nixio.fork()
+
+       if pid > 0 then
+               fdo:close()
+               local close
+               return function()
+                       local buffer = fdi:read(2048)
+                       local wpid, stat = nixio.waitpid(pid, "nohang")
+                       if not close and wpid and stat == "exited" then
+                               close = true
+                       end
+
+                       if buffer and #buffer > 0 then
+                               return buffer
+                       elseif close then
+                               fdi:close()
+                               return nil
+                       end
+               end
+       elseif pid == 0 then
+               nixio.dup(fdo, nixio.stdout)
+               fdi:close()
+               fdo:close()
+               nixio.exec("/bin/sh", "-c", command)
+       end
+end