From 406c20222affa4940c4b90b42e8cc22cbe10c5e2 Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Wed, 12 Jun 2013 13:28:24 +0200
Subject: Added Process.runShellCommand*() methods.

---
 libraries/Bridge/Process.cpp                       | 14 ++++++++++++
 libraries/Bridge/Process.h                         |  3 +++
 .../examples/ShellCommands/ShellCommands.ino       | 26 ++++++++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 libraries/Bridge/examples/ShellCommands/ShellCommands.ino

diff --git a/libraries/Bridge/Process.cpp b/libraries/Bridge/Process.cpp
index 78f168f..219922a 100644
--- a/libraries/Bridge/Process.cpp
+++ b/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};
diff --git a/libraries/Bridge/Process.h b/libraries/Bridge/Process.h
index cf950d4..cacf516 100644
--- a/libraries/Bridge/Process.h
+++ b/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 
diff --git a/libraries/Bridge/examples/ShellCommands/ShellCommands.ino b/libraries/Bridge/examples/ShellCommands/ShellCommands.ino
new file mode 100644
index 0000000..a362ed8
--- /dev/null
+++ b/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);
+}
+
-- 
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