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backend/session: filter udev events by sysname 

We're only interested in card devices. The loop over wlr_session.devices
would take care of ignoring non-card events, but a future patch will
listen to udev "add" events as well.
This commit is contained in:
Simon Ser 2020-11-06 10:42:43 +01:00
parent 44a4792fd8
commit 768fbaad54
1 changed files with 16 additions and 5 deletions
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21
backend/session/session.c
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@ -33,6 +33,19 @@ static const struct session_impl *impls[] = {
NULL,
};
static bool is_drm_card(const char *sysname) {
const char prefix[] = "card";
if (strncmp(sysname, prefix, strlen(prefix)) != 0) {
return false;
}
for (size_t i = strlen(prefix); sysname[i] != '\0'; i++) {
if (sysname[i] < '0' || sysname[i] > '9') {
return false;
}
}
return true;
}
static int udev_event(int fd, uint32_t mask, void *data) {
struct wlr_session *session = data;
@ -41,18 +54,16 @@ static int udev_event(int fd, uint32_t mask, void *data) {
return 1;
}
const char *sysname = udev_device_get_sysname(udev_dev);
const char *action = udev_device_get_action(udev_dev);
wlr_log(WLR_DEBUG, "udev event for %s (%s)", sysname, action);
wlr_log(WLR_DEBUG, "udev event for %s (%s)",
udev_device_get_sysname(udev_dev), action);
if (!action || strcmp(action, "change") != 0) {
if (!is_drm_card(sysname) || !action || strcmp(action, "change") != 0) {
goto out;
}
dev_t devnum = udev_device_get_devnum(udev_dev);
struct wlr_device *dev;
wl_list_for_each(dev, &session->devices, link) {
if (dev->dev == devnum) {
wlr_signal_emit_safe(&dev->events.change, NULL);