Added Process.runShellCommand*() methods.

libraries/Bridge/Process.cpp

@@ -118,6 +118,20 @@ void Process::close() {
   started = false;
 }
 
+unsigned int Process::runShellCommand(const String &command) {
+  runShellCommandAsynchronously(command);
+  while (running())
+    delay(100);
+  return exitValue();
+}
+
+void Process::runShellCommandAsynchronously(const String &command) {
+  begin("/bin/ash");
+  addParameter("-c");
+  addParameter(command);
+  runAsynchronously();
+}
+
 // This method is currently unused
 //static unsigned int __commandOutputAvailable(uint8_t handle) {
 //  uint8_t cmd[] = {'o', handle};

libraries/Bridge/Process.h

@@ -36,6 +36,9 @@ public:
   unsigned int exitValue();
   void close();
 
+  unsigned int runShellCommand(const String &command);
+  void runShellCommandAsynchronously(const String &command);
+
   operator bool () { return started; }
 
   // Stream methods 

libraries/Bridge/examples/ShellCommands/ShellCommands.ino

@@ -0,0 +1,26 @@
+
+/* Demonstrate shell commands */
+
+#include <Process.h>
+
+void setup() {
+  Bridge.begin();
+  Console.begin();
+  Console.buffer(64);
+}
+
+void loop() {
+  Process p;
+  // This command line prints the number of bytes received and transmitted from WLAN
+  p.runShellCommand(F("ifconfig wlan0 | grep \"RX bytes\" | tr ':' ' ' | awk \"{ print \\$3 \\\" \\\" \\$8 }\"\n"));
+
+  // Read command output
+  while (p.available()) {
+    char c = p.read();
+    Console.print(c);
+  }
+  Console.flush();
+  
+  delay(5000);
+}
+