1 files changed, 111 insertions, 0 deletions
diff --git a/libseat/libseat.c b/libseat/libseat.c
new file mode 100644
index 0000000..a1aed18
--- /dev/null
+++ b/libseat/libseat.c
@@ -0,0 +1,111 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "backend.h"
+#include "compiler.h"
+#include "libseat.h"
+#include "log.h"
+
+extern const struct libseat_impl seatd_impl;
+extern const struct libseat_impl logind_impl;
+extern const struct libseat_impl builtin_impl;
+
+static const struct named_backend impls[] = {
+#ifdef SEATD_ENABLED
+	{"seatd", &seatd_impl},
+#endif
+#ifdef LOGIND_ENABLED
+	{"logind", &logind_impl},
+#endif
+#ifdef BUILTIN_ENABLED
+	{"builtin", &builtin_impl},
+#endif
+	{NULL, NULL},
+};
+
+#if !defined(SEATD_ENABLED) && !defined(LOGIND_ENABLED) && !defined(BUILTIN_ENABLED)
+#error At least one backend must be enabled
+#endif
+
+LIBSEAT_EXPORT struct libseat *libseat_open_seat(struct libseat_seat_listener *listener, void *data) {
+	if (listener == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	char *loglevel = getenv("SEATD_LOGLEVEL");
+	enum libseat_log_level level = LIBSEAT_SILENT;
+	if (loglevel != NULL) {
+		if (strcmp(loglevel, "silent") == 0) {
+			level = LIBSEAT_SILENT;
+		} else if (strcmp(loglevel, "info") == 0) {
+			level = LIBSEAT_INFO;
+		} else if (strcmp(loglevel, "debug") == 0) {
+			level = LIBSEAT_DEBUG;
+		}
+	}
+	libseat_log_init(level);
+
+	char *backend_type = getenv("LIBSEAT_BACKEND");
+	struct libseat *backend = NULL;
+	for (const struct named_backend *iter = impls; iter->backend != NULL; iter++) {
+		log_debugf("libseat_open_seat: trying backend '%s'", iter->name);
+		if (backend_type != NULL && strcmp(backend_type, iter->name) != 0) {
+			continue;
+		}
+		backend = iter->backend->open_seat(listener, data);
+		if (backend != NULL) {
+			log_infof("libseat_open_seat: seat opened with backend '%s'", iter->name);
+			break;
+		}
+	}
+	if (backend == NULL) {
+		errno = ENOSYS;
+	}
+	return backend;
+}
+
+LIBSEAT_EXPORT int libseat_disable_seat(struct libseat *seat) {
+	assert(seat && seat->impl);
+	return seat->impl->disable_seat(seat);
+}
+
+LIBSEAT_EXPORT int libseat_close_seat(struct libseat *seat) {
+	assert(seat && seat->impl);
+	return seat->impl->close_seat(seat);
+}
+
+LIBSEAT_EXPORT const char *libseat_seat_name(struct libseat *seat) {
+	assert(seat && seat->impl);
+	return seat->impl->seat_name(seat);
+}
+
+LIBSEAT_EXPORT int libseat_open_device(struct libseat *seat, const char *path, int *fd) {
+	assert(seat && seat->impl);
+	return seat->impl->open_device(seat, path, fd);
+}
+
+LIBSEAT_EXPORT int libseat_close_device(struct libseat *seat, int device_id) {
+	assert(seat && seat->impl);
+	return seat->impl->close_device(seat, device_id);
+}
+
+LIBSEAT_EXPORT int libseat_get_fd(struct libseat *seat) {
+	assert(seat && seat->impl);
+	return seat->impl->get_fd(seat);
+}
+
+LIBSEAT_EXPORT int libseat_dispatch(struct libseat *seat, int timeout) {
+	assert(seat && seat->impl);
+	return seat->impl->dispatch(seat, timeout);
+}
+
+LIBSEAT_EXPORT int libseat_switch_session(struct libseat *seat, int session) {
+	assert(seat && seat->impl);
+	return seat->impl->switch_session(seat, session);
+}