auto import from //depot/cupcake/@135843
diff --git a/adb/test_track_devices.c b/adb/test_track_devices.c
new file mode 100644
index 0000000..77b3ad9
--- /dev/null
+++ b/adb/test_track_devices.c
@@ -0,0 +1,97 @@
+/* a simple test program, connects to ADB server, and opens a track-devices session */
+#include <netdb.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <memory.h>
+
+static void
+panic( const char* msg )
+{
+ fprintf(stderr, "PANIC: %s: %s\n", msg, strerror(errno));
+ exit(1);
+}
+
+static int
+unix_write( int fd, const char* buf, int len )
+{
+ int result = 0;
+ while (len > 0) {
+ int len2 = write(fd, buf, len);
+ if (len2 < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ return -1;
+ }
+ result += len2;
+ len -= len2;
+ buf += len2;
+ }
+ return result;
+}
+
+static int
+unix_read( int fd, char* buf, int len )
+{
+ int result = 0;
+ while (len > 0) {
+ int len2 = read(fd, buf, len);
+ if (len2 < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ return -1;
+ }
+ result += len2;
+ len -= len2;
+ buf += len2;
+ }
+ return result;
+}
+
+
+int main( void )
+{
+ int ret, s;
+ struct sockaddr_in server;
+ char buffer[1024];
+ const char* request = "host:track-devices";
+ int len;
+
+ memset( &server, 0, sizeof(server) );
+ server.sin_family = AF_INET;
+ server.sin_port = htons(5037);
+ server.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+ s = socket( PF_INET, SOCK_STREAM, 0 );
+ ret = connect( s, (struct sockaddr*) &server, sizeof(server) );
+ if (ret < 0) panic( "could not connect to server" );
+
+ /* send the request */
+ len = snprintf( buffer, sizeof buffer, "%04x%s", strlen(request), request );
+ if (unix_write(s, buffer, len) < 0)
+ panic( "could not send request" );
+
+ /* read the OKAY answer */
+ if (unix_read(s, buffer, 4) != 4)
+ panic( "could not read request" );
+
+ printf( "server answer: %.*s\n", 4, buffer );
+
+ /* now loop */
+ for (;;) {
+ char head[5] = "0000";
+
+ if (unix_read(s, head, 4) < 0)
+ panic("could not read length");
+
+ if ( sscanf( head, "%04x", &len ) != 1 )
+ panic("could not decode length");
+
+ if (unix_read(s, buffer, len) != len)
+ panic("could not read data");
+
+ printf( "received header %.*s (%d bytes):\n%.*s", 4, head, len, len, buffer );
+ }
+ close(s);
+}