Point users at fuser to figure out what has the device open

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

2 files changed, 10 insertions, 2 deletions

diff --git a/evtest.c b/evtest.c
index 668d8c7..f2dc904 100644
--- a/evtest.c
+++ b/evtest.c
@@ -973,8 +973,6 @@ static int do_capture(const char *device)
 		return EXIT_FAILURE;
 	}
 
-	free(filename);
-
 	if (!isatty(fileno(stdout)))
 		setbuf(stdout, NULL);
 
@@ -991,9 +989,14 @@ static int do_capture(const char *device)
 		       "  other grab is active.\n");
 		printf("  In most cases, this is caused by an X driver,\n"
 		       "  try VT-switching and re-run evtest again.\n");
+		printf("  Run the following command to see processes with\n"
+		       "  an open fd on this device\n"
+		       " \"fuser -v %s\"\n", filename);
 		printf("***********************************************\n");
 	}
 
+	free(filename);
+
 	return print_events(fd);
 }
 
diff --git a/evtest.txt b/evtest.txt
index b614482..ab89afb 100644
--- a/evtest.txt
+++ b/evtest.txt
@@ -48,6 +48,11 @@ when debugging a synaptics device from within X. VT switching to a TTY or
 shutting down the X server terminates this grab and synaptics devices can be
 debugged.
 
+The following command shows the processes with an open file descriptor on
+the device:
+
+   fuser -v /dev/input/eventX
+
 EXIT CODE
 ---------
 evtest returns 1 on error.