trace-cmd: Do not read entire file in trace_empty()

The function to test if the trace is empty should stop when
it detects a line that is not empty, and report it.
It actually had a bug where it would reach the end of the file
and report that the trace was not empty.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/trace-cmd.c b/trace-cmd.c
index a073017..d13cb15 100644
--- a/trace-cmd.c
+++ b/trace-cmd.c
@@ -696,8 +696,10 @@ static int trace_empty(void)
                 n = getline(&line, &size, fp);
                 if (!line)
                         ret = 1;
-                else if (line[0] != '#')
+                else if (line[0] != '#') {
                         ret = 0;
+                        break;
+                }
                 if (n < 0)
                         ret = 1;
         } while (line && n > 0);