Simplification of the "exec" sample

examples/exec.c

@@ -7,7 +7,7 @@
 int main(void) {
   ssh_session session;
   ssh_channel channel;
-  ssh_buffer buf;
+  char buffer[256];
   int rc;
 
   session = connect_ssh("localhost", NULL, 0);
@@ -18,7 +18,6 @@ int main(void) {
   channel = channel_new(session);;
   if (channel == NULL) {
     ssh_disconnect(session);
-    ssh_finalize();
     return 1;
   }
 
@@ -26,7 +25,6 @@ int main(void) {
   if (rc < 0) {
     channel_close(channel);
     ssh_disconnect(session);
-    ssh_finalize();
     return 1;
   }
 
@@ -34,34 +32,24 @@ int main(void) {
   if (rc < 0) {
     channel_close(channel);
     ssh_disconnect(session);
-    ssh_finalize();
     return 1;
   }
 
 
-  if (channel_is_open(channel)) {
-    while (channel_poll(channel, 0) >= 0) {
-      buf = buffer_new();
-      rc = channel_read_buffer(channel, buf, 0, 0);
-      if (rc < 0) {
-        buffer_free(buf);
-        channel_close(channel);
-        ssh_disconnect(session);
-        ssh_finalize();
-        return 1;
-      }
-
-      printf("%s\n", (char *) buffer_get(buf));
-
-      buffer_free(buf);
-    }
+  while ((rc = channel_read(channel, buffer, sizeof(buffer), 0)) >= 0) {
+    fwrite(buffer, 1, rc, stdout);
+  }
+    
+  if (rc < 0) {
+    channel_close(channel);
+    ssh_disconnect(session);
+    return 1;
   }
 
   channel_send_eof(channel);
   channel_close(channel);
 
   ssh_disconnect(session);
-  ssh_finalize();
 
   return 0;
 }