Bridge library to the 1.5 format

libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino

@@ -0,0 +1,82 @@
+/*
+  Write to file using FileIO classes.
+ 
+ This sketch demonstrate how to write file into the Yún filesystem.
+ A shell script file is created in /tmp, and it is executed afterwards.
+
+ created 7 June 2010
+ by Cristian Maglie 
+ 
+ This example code is in the public domain.
+
+ */
+ 
+#include <FileIO.h>
+
+void setup() {
+  // Setup Bridge (needed every time we communicate with the Arduino Yún)
+  Bridge.begin();
+  // Initialize the Serial
+  Serial.begin(9600);
+  
+  while(!Serial);  // wait for Serial port to connect.
+  Serial.println("File Write Script example\n\n");
+  
+  // Setup File IO
+  FileSystem.begin();
+
+  // Upload script used to gain network statistics  
+  uploadScript();
+}  
+
+void loop() {
+  // Run stats script every 5 secs.
+  runScript();
+  delay(5000);
+}
+
+// this function creates a file into the linux processor that contains a shell script
+// to check the network traffic of the WiFi interface
+void uploadScript() {
+  // Write our shell script in /tmp
+  // Using /tmp stores the script in RAM this way we can preserve 
+  // the limited amount of FLASH erase/write cycles
+  File script = FileSystem.open("/tmp/wlan-stats.sh", FILE_WRITE);
+  // Shell script header 
+  script.print("#!/bin/sh\n");
+  // shell commands:
+  // ifconfig: is a command line utility for controlling the network interfaces.
+  //           wlan0 is the interface we want to query
+  // grep: search inside the output of the ifconfig command the "RX bytes" keyword
+  //       and extract the line that contains it
+  script.print("ifconfig wlan0 | grep 'RX bytes'\n");
+  script.close();  // close the file
+  
+  // Make the script executable
+  Process chmod;
+  chmod.begin("chmod");      // chmod: change mode
+  chmod.addParameter("+x");  // x stays for executable
+  chmod.addParameter("/tmp/wlan-stats.sh");  // path to the file to make it executable
+  chmod.run();
+}
+
+
+// this function run the script and read the output data
+void runScript() {
+  // Run the script and show results on the Serial
+  Process myscript;
+  myscript.begin("/tmp/wlan-stats.sh");
+  myscript.run();
+  
+  String output = "";
+  
+  // read the output of the script
+  while (myscript.available()) {
+    output += (char)myscript.read();
+  }
+  // remove the blank spaces at the beginning and the ending of the string
+  output.trim();
+  Serial.println(output);
+  Serial.flush();
+}
+