add emulate-key

1 files changed, 123 insertions, 0 deletions

diff --git a/emulate-key.c b/emulate-key.c
new file mode 100644
index 0000000..8affc02
--- /dev/null
+++ b/emulate-key.c
@@ -0,0 +1,123 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <linux/input.h>
+#include <linux/uinput.h>
+
+#include "input.h"
+
+/* ------------------------------------------------------------------ */
+
+static int usage(char *prog, int error)
+{
+	fprintf(error ? stderr : stdout,
+		"usage: %s -h            this text\n"
+		"usage: %s -l            list keys\n"
+		"usage: %s [ -v ] <key>  send key\n",
+		prog, prog, prog);
+	exit(error);
+}
+
+static int send_key(int fd, int key, bool down)
+{
+        struct input_event ev;
+
+        memset(&ev, 0, sizeof(ev));
+        ev.type = EV_KEY;
+        ev.code = key;
+        ev.value = down ? 0 : 1;
+        write(fd, &ev, sizeof(ev));
+
+        memset(&ev, 0, sizeof(ev));
+        ev.type = EV_SYN;
+        write(fd, &ev, sizeof(ev));
+
+        return 0;
+}
+
+int main(int argc, char *argv[])
+{
+        static struct uinput_user_dev uidev = {
+                .name = "emulate-key",
+        };
+        int verbose = 0;
+	int c, key, fd;
+        char *name;
+
+	for (;;) {
+		if (-1 == (c = getopt(argc, argv, "hvl")))
+			break;
+		switch (c) {
+                case 'v':
+                        verbose = 1;
+                        break;
+                case 'l':
+                        for (key = 0; key < KEY_MAX; key++) {
+                                name = ev_type_name(EV_KEY, key);
+                                if (!name)
+                                        continue;
+                                if (strcmp(name, "???") == 0)
+                                        continue;
+                                printf("%s%s", key ? ", " : "", name);
+                        }
+                        printf("\n");
+                        exit(0);
+		case 'h':
+			usage(argv[0],0);
+		default:
+			usage(argv[0],1);
+		}
+	}
+
+        if (optind == argc) {
+                fprintf(stderr, "%s: no keyname given\n",
+                        argv[0]);
+                exit(1);
+        }
+        for (key = 0; key < KEY_MAX; key++) {
+                if (strcmp(ev_type_name(EV_KEY, key), argv[optind]) == 0) {
+                        break;
+                }
+        }
+        if (key == KEY_MAX) {
+                fprintf(stderr, "%s: key '%s' not found\n",
+                        argv[0], argv[optind]);
+                exit(1);
+        }
+        if (verbose) {
+                printf("Sending '%s' (%d) key (down+up).\n", argv[optind], key);
+        }
+
+        fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
+        if (fd < 0) {
+                perror("open /dev/uinput");
+                exit(1);
+        }
+
+        ioctl(fd, UI_SET_EVBIT, EV_SYN);
+        ioctl(fd, UI_SET_EVBIT, EV_KEY);
+        ioctl(fd, UI_SET_KEYBIT, key);
+        write(fd, &uidev, sizeof(uidev));
+        ioctl(fd, UI_DEV_CREATE);
+
+        usleep(100000);
+        send_key(fd, key, true);
+        usleep(100000);
+        send_key(fd, key, false);
+        usleep(100000);
+
+        ioctl(fd, UI_DEV_DESTROY);
+
+	return 0;
+}
+
+/* ---------------------------------------------------------------------
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */