vlib: fix unix cli SIGSEGV for empty line input

[vpp.git] / src / vlib / unix / cli.c

diff --git a/src/vlib/unix/cli.c b/src/vlib/unix/cli.c
index 6e566d1..2a13c84 100644 (file)
--- a/src/vlib/unix/cli.c
+++ b/src/vlib/unix/cli.c
@@ -2557,7 +2557,8 @@ more:
                   format_timeval, 0 /* current bat-time */ ,
                   0 /* current bat-format */ ,
                   cli_file_index, cf->current_command);
-      if (cf->current_command[vec_len (cf->current_command) - 1] != '\n')
+      if ((vec_len (cf->current_command) > 0) &&
+         (cf->current_command[vec_len (cf->current_command) - 1] != '\n'))
        lv = format (lv, "\n");
       int rv __attribute__ ((unused)) = write (um->log_fd, lv, vec_len (lv));
     }