Initial netbsd support

common/drm.c

@@ -6,6 +6,11 @@
 #include <sys/sysmacros.h>
 #endif
 
+#if defined(__NetBSD__)
+#include <stdlib.h>
+#include <sys/stat.h>
+#endif
+
 #include "drm.h"
 
 // From libdrm
@@ -40,6 +45,16 @@ int path_is_drm(const char *path) {
 	static const int prefixlen = STRLEN(prefix);
 	return strncmp(prefix, path, prefixlen) == 0;
 }
+#elif defined(__NetBSD__)
+int path_is_drm(const char *path) {
+	static const char prefix[] = "/dev/dri/";
+	static const int prefixlen = STRLEN(prefix);
+	return strncmp(prefix, path, prefixlen) == 0;
+}
+
+int dev_is_drm(dev_t device) {
+	return major(device) == getdevmajor("drm", S_IFCHR);
+}
 #else
 #error Unsupported platform
 #endif

common/evdev.c

@@ -9,6 +9,9 @@
 #include <sys/sysmacros.h>
 #elif defined(__FreeBSD__)
 #include <dev/evdev/input.h>
+#elif defined(__NetBSD__)
+#include <stdlib.h>
+#include <sys/stat.h>
 #else
 #error Unsupported platform
 #endif
@@ -17,6 +20,7 @@
 
 #define STRLEN(s) ((sizeof(s) / sizeof(s[0])) - 1)
 
+#if defined(__linux__) || defined(__FreeBSD__)
 int path_is_evdev(const char *path) {
 	static const char prefix[] = "/dev/input/event";
 	static const size_t prefixlen = STRLEN(prefix);
@@ -26,9 +30,28 @@ int path_is_evdev(const char *path) {
 int evdev_revoke(int fd) {
 	return ioctl(fd, EVIOCREVOKE, NULL);
 }
+#endif
 
 #if defined(__linux__)
 int dev_is_evdev(dev_t device) {
 	return major(device) == INPUT_MAJOR;
 }
+#elif defined(__NetBSD__)
+int dev_is_evdev(dev_t device) {
+	return major(device) == getdevmajor("wskbd", S_IFCHR) ||
+	       major(device) == getdevmajor("wsmouse", S_IFCHR) ||
+	       major(device) == getdevmajor("wsmux", S_IFCHR);
+}
+int path_is_evdev(const char *path) {
+	const char *wskbd = "/dev/wskbd";
+	const char *wsmouse = "/dev/wsmouse";
+	const char *wsmux = "/dev/wsmux";
+	return strncmp(path, wskbd, STRLEN(wskbd)) == 0 ||
+	       strncmp(path, wsmouse, STRLEN(wsmouse)) == 0 ||
+	       strncmp(path, wsmux, STRLEN(wsmouse)) == 0;
+}
+int evdev_revoke(int fd) {
+	(void)fd;
+	return 0;
+}
 #endif

common/terminal.c

@@ -21,6 +21,11 @@
 #define K_ENABLE  K_XLATE
 #define K_DISABLE K_RAW
 #define FRSIG     SIGIO
+#elif defined(__NetBSD__)
+#include <dev/wscons/wsdisplay_usl_io.h>
+#define K_ENABLE  K_XLATE
+#define K_DISABLE K_RAW
+#define FRSIG     0 // unimplemented
 #else
 #error Unsupported platform
 #endif
@@ -134,6 +139,14 @@ static int get_tty_path(int tty, char path[static TTYPATHLEN]) {
 	}
 	return 0;
 }
+#elif defined(__NetBSD__)
+static int get_tty_path(int tty, char path[static TTYPATHLEN]) {
+	assert(tty >= 0);
+	if (snprintf(path, TTYPATHLEN, "/dev/ttyE%d", tty) == -1) {
+		return -1;
+	}
+	return 0;
+}
 #else
 #error Unsupported platform
 #endif
@@ -153,7 +166,7 @@ int terminal_open(int vt) {
 }
 
 int terminal_current_vt(int fd) {
-#if defined(__linux__)
+#if defined(__linux__) || defined(__NetBSD__)
 	struct vt_stat st;
 	int res = ioctl(fd, VT_GETSTATE, &st);
 	close(fd);
@@ -231,12 +244,13 @@ int terminal_ack_acquire(int fd) {
 
 int terminal_set_keyboard(int fd, bool enable) {
 	log_debugf("Setting KD keyboard state to %d", enable);
+#if defined(__linux__) || defined(__NetBSD__)
 	if (ioctl(fd, KDSKBMODE, enable ? K_ENABLE : K_DISABLE) == -1) {
 		log_errorf("Could not set KD keyboard mode to %s: %s",
 			   enable ? "enabled" : "disabled", strerror(errno));
 		return -1;
 	}
-#if defined(__FreeBSD__)
+#elif defined(__FreeBSD__)
 	struct termios tios;
 	if (tcgetattr(fd, &tios) == -1) {
 		log_errorf("Could not set get terminal mode: %s", strerror(errno));

include/drm.h

@@ -5,7 +5,7 @@ int drm_set_master(int fd);
 int drm_drop_master(int fd);
 int path_is_drm(const char *path);
 
-#if defined(__linux__)
+#if defined(__linux__) || defined(__NetBSD__)
 #include <sys/types.h>
 int dev_is_drm(dev_t device);
 #endif

include/evdev.h

@@ -4,7 +4,7 @@
 int evdev_revoke(int fd);
 int path_is_evdev(const char *path);
 
-#if defined(__linux__)
+#if defined(__linux__) || defined(__NetBSD__)
 #include <sys/types.h>
 int dev_is_evdev(dev_t device);
 #endif

meson.build

@@ -30,6 +30,7 @@ add_project_arguments(
 	[
 		'-D_XOPEN_SOURCE=700',
 		'-D__BSD_VISIBLE',
+		'-D_NETBSD_SOURCE',
 		'-DSEATD_VERSION="@0@"'.format(meson.project_version()),
 		'-DSEATD_DEFAULTPATH="@0@"'.format(defaultpath),
 		'-DSEATD_INSTALLPATH="@0@"'.format(seatdpath),

seatd/client.c

@@ -14,6 +14,10 @@
 #include <sys/un.h>
 #endif
 
+#if defined(__NetBSD__)
+#include <sys/un.h>
+#endif
+
 #include "client.h"
 #include "linked_list.h"
 #include "log.h"
@@ -34,6 +38,23 @@ static int get_peer(int fd, pid_t *pid, uid_t *uid, gid_t *gid) {
 	*uid = cred.uid;
 	*gid = cred.gid;
 	return 0;
+#elif defined(__NetBSD__)
+	struct unpcbid cred;
+	socklen_t len = sizeof cred;
+	if (getsockopt(fd, 0, LOCAL_PEEREID, &cred, &len) == -1) {
+		// assume builtin backend
+		if (errno == EINVAL) {
+			*pid = getpid();
+			*uid = getuid();
+			*gid = getgid();
+			return 0;
+		}
+		return -1;
+	}
+	*pid = cred.unp_pid;
+	*uid = cred.unp_euid;
+	*gid = cred.unp_egid;
+	return 0;
 #elif defined(__FreeBSD__)
 	struct xucred cred;
 	socklen_t len = sizeof cred;
@@ -468,7 +489,13 @@ int client_handle_connection(int fd, uint32_t mask, void *data) {
 			goto fail;
 		}
 		if (len == 0) {
+// https://man.netbsd.org/poll.2
+// Sockets produce POLLIN rather than POLLHUP when the remote end is closed.
+#if defined(__NetBSD__)
+			log_info("Client disconnected");
+#else
 			log_error("Could not read client connection: zero-length read");
+#endif
 			goto fail;
 		}