cmdline: add polling mode

[dpdk.git] / lib / librte_cmdline / cmdline.c

diff --git a/lib/librte_cmdline/cmdline.c b/lib/librte_cmdline/cmdline.c
index e61c4f2..6a55f1f 100644 (file)
--- a/lib/librte_cmdline/cmdline.c
+++ b/lib/librte_cmdline/cmdline.c
@@ -65,6 +65,7 @@
 #include <stdarg.h>
 #include <inttypes.h>
 #include <fcntl.h>
+#include <poll.h>
 #include <errno.h>
 #include <termios.h>
 #include <netinet/in.h>
@@ -246,6 +247,40 @@ cmdline_quit(struct cmdline *cl)
        rdline_quit(&cl->rdl);
 }
 
+int
+cmdline_poll(struct cmdline *cl)
+{
+       struct pollfd pfd;
+       int status;
+       ssize_t read_status;
+       char c;
+
+       if (!cl)
+               return -EINVAL;
+       else if (cl->rdl.status == RDLINE_EXITED)
+               return RDLINE_EXITED;
+
+       pfd.fd = cl->s_in;
+       pfd.events = POLLIN;
+       pfd.revents = 0;
+
+       status = poll(&pfd, 1, 0);
+       if (status < 0)
+               return status;
+       else if (status > 0) {
+               c = -1;
+               read_status = read(cl->s_in, &c, 1);
+               if (read_status < 0)
+                       return read_status;
+
+               status = cmdline_in(cl, &c, 1);
+               if (status < 0 && cl->rdl.status != RDLINE_EXITED)
+                       return status;
+       }
+
+       return cl->rdl.status;
+}
+
 void
 cmdline_interact(struct cmdline *cl)
 {