First commit

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 60 insertions, 0 deletions

diff --git a/libgamepad_get_attachment_event.c b/libgamepad_get_attachment_event.c
new file mode 100644
index 0000000..4462356
--- /dev/null
+++ b/libgamepad_get_attachment_event.c
@@ -0,0 +1,60 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+libgamepad_get_attachment_event(LIBGAMEPAD_ATTACHMENT_MONITOR *monitor, char **syspathp, size_t *sizep,
+                                enum libgamepad_attachment_event_type *typep)
+{
+	struct udev_device *device;
+	const char *action;
+	const char *syspath;
+	size_t len;
+	void *new;
+	char *syspath_end;
+	int saved_errno;
+
+	device = udev_monitor_receive_device(monitor->monitor);
+	if (!device)
+		return -1;
+
+	action = udev_device_get_action(device);
+	if (!strcmp(action, "bind"))
+		*typep = LIBGAMEPAD_ADDED;
+	else if (!strcmp(action, "unbind"))
+		*typep = LIBGAMEPAD_REMOVED;
+	else
+		goto suppress;
+
+	syspath = udev_device_get_syspath(device);
+	if (!syspath || !*syspath)
+		goto suppress;
+	len = strlen(syspath) + sizeof("/hidraw");
+	if (len > *sizep) {
+		new = realloc(*syspathp, len);
+		if (!new) {
+			udev_device_unref(device);
+			return -1;
+		}
+		*syspathp = new;
+		*sizep = len;
+	}
+	syspath_end = stpcpy(*syspathp, syspath);
+
+	if (*typep == LIBGAMEPAD_ADDED) {
+		stpcpy(syspath_end, "/hidraw");
+		saved_errno = errno;
+		if (access(*syspathp, F_OK)) {
+			errno = saved_errno;
+			goto suppress;
+		}
+		*syspath_end = '\0';
+	}
+
+	udev_device_unref(device);
+	return 1;
+
+suppress:
+	udev_device_unref(device);
+	return 0;
+}