Allow replay of device data through grail

This patch adds replay capabilities to grail. If the specified
device points to a valid evemu file, the device properties will
be extracted from that file instead. Any appended event data will
be replayed in realtime when calling grail_pull_mtdev().

In practise, grail_gesture may be executed with a test file.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 8 insertions, 2 deletions

diff --git a/tools/grail-gesture.c b/tools/grail-gesture.c
index 368150e..7230c3b 100644
--- a/tools/grail-gesture.c
+++ b/tools/grail-gesture.c
@@ -82,6 +82,7 @@ static void loop_device(struct grail *ge, int fd)
 int main(int argc, char *argv[])
 {
         struct grail ge;
+        struct stat fs;
         int i, fd;
 
         if (argc < 3) {
@@ -104,7 +105,11 @@ int main(int argc, char *argv[])
                 fprintf(stderr, "error: could not open device\n");
                 return -1;
         }
-        if (ioctl(fd, EVIOCGRAB, 1)) {
+        if (fstat(fd, &fs)) {
+                fprintf(stderr, "error: could not stat the device\n");
+                return -1;
+        }
+        if (fs.st_rdev && ioctl(fd, EVIOCGRAB, 1)) {
                 fprintf(stderr, "error: could not grab the device\n");
                 return -1;
         }
@@ -121,7 +126,8 @@ int main(int argc, char *argv[])
         loop_device(&ge, fd);
         grail_close(&ge, fd);
 
-        ioctl(fd, EVIOCGRAB, 0);
+        if (fs.st_rdev)
+                ioctl(fd, EVIOCGRAB, 0);
         close(fd);
         return 0;
 }