diff options
| -rw-r--r-- | ui/input-linux.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/ui/input-linux.c b/ui/input-linux.c index 9c921cc0ad..1d33b5c121 100644 --- a/ui/input-linux.c +++ b/ui/input-linux.c @@ -337,7 +337,7 @@ static void input_linux_event_mouse(void *opaque) static void input_linux_complete(UserCreatable *uc, Error **errp) { InputLinux *il = INPUT_LINUX(uc); - uint32_t evtmap; + uint32_t evtmap, relmap, absmap; int rc, ver; if (!il->evdev) { @@ -359,16 +359,36 @@ static void input_linux_complete(UserCreatable *uc, Error **errp) } rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap); + if (rc < 0) { + error_setg(errp, "%s: failed to read event bits", il->evdev); + goto err_close; + } if (evtmap & (1 << EV_REL)) { - /* has relative axis -> assume mouse */ + rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap); + if (rc < 0) { + relmap = 0; + } + } + + if (evtmap & (1 << EV_ABS)) { + ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap); + if (rc < 0) { + absmap = 0; + } + } + + if ((evtmap & (1 << EV_REL)) && + (relmap & (1 << REL_X))) { + /* has relative x axis -> assume mouse */ qemu_set_fd_handler(il->fd, input_linux_event_mouse, NULL, il); - } else if (evtmap & (1 << EV_ABS)) { - /* has absolute axis -> not supported */ + } else if ((evtmap & (1 << EV_ABS)) && + (absmap & (1 << ABS_X))) { + /* has absolute x axis -> not supported */ error_setg(errp, "tablet/touchscreen not supported"); goto err_close; } else if (evtmap & (1 << EV_KEY)) { - /* has keys/buttons (and no axis) -> assume keyboard */ + /* has keys/buttons (and no x axis) -> assume keyboard */ qemu_set_fd_handler(il->fd, input_linux_event_keyboard, NULL, il); } else { /* Huh? What is this? */ |