libs/sys: Added luci.sys.call

diff --git a/libs/sys/luasrc/sys.lua b/libs/sys/luasrc/sys.lua
index a53db93..e27e1c4 100644 (file)
--- a/libs/sys/luasrc/sys.lua
+++ b/libs/sys/luasrc/sys.lua
@@ -41,6 +41,20 @@ local tonumber, ipairs, pairs = tonumber, ipairs, pairs
 --- LuCI Linux and POSIX system utilities.
 module "luci.sys"
 
+--- Execute a given shell command and return the error code
+-- @class              function
+-- @name               call
+-- @param              ...             Command to call
+-- @return             Error code of the command
+function call(...)
+       return os.execute(...) / 256
+end
+
+--- Execute a given shell command and capture its standard output
+-- @class              function
+-- @name               exec
+-- @param command      Command to call
+-- @return                     String containg the return the output of the command
 exec = luci.util.exec
 
 --- Invoke the luci-flash executable to write an image to the flash memory.