diff -ruwN source-old/fuzzing/fuzz_resolver.c source/fuzzing/fuzz_resolver.c
--- source-old/fuzzing/fuzz_resolver.c	2025-11-03 05:42:10.000000000 -0700
+++ source/fuzzing/fuzz_resolver.c	2025-11-10 12:32:57.663974728 -0700
@@ -29,7 +29,7 @@
                  gint          rrtype)
 {
   /* g_resolver_records_from_res_query() is only available on Unix */
-#ifdef G_OS_UNIX
+#if defined(G_OS_UNIX) && !defined(__redox__)
   GList *record_list = NULL;
 
   /* Data too long? */
diff -ruwN source-old/gio/gcredentialsprivate.h source/gio/gcredentialsprivate.h
--- source-old/gio/gcredentialsprivate.h	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/gcredentialsprivate.h	2025-11-10 12:35:09.114747806 -0700
@@ -104,7 +104,7 @@
  */
 #undef G_CREDENTIALS_HAS_PID
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__redox__)
 #define G_CREDENTIALS_SUPPORTED 1
 #define G_CREDENTIALS_USE_LINUX_UCRED 1
 #define G_CREDENTIALS_NATIVE_TYPE G_CREDENTIALS_TYPE_LINUX_UCRED
diff -ruwN source-old/gio/glocalfile.c source/gio/glocalfile.c
--- source-old/gio/glocalfile.c	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/glocalfile.c	2025-11-10 12:32:57.664235788 -0700
@@ -47,6 +47,10 @@
 #include <sys/mount.h>
 #endif
 
+#if defined(__redox__)
+#undef AT_FDCWD
+#endif
+
 #ifndef O_BINARY
 #define O_BINARY 0
 #endif
diff -ruwN source-old/gio/gnetworking.h.in source/gio/gnetworking.h.in
--- source-old/gio/gnetworking.h.in	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/gnetworking.h.in	2025-11-10 12:32:57.664602707 -0700
@@ -40,13 +40,17 @@
 #include <netdb.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
+#if !defined(__redox__)
 #include <resolv.h>
+#endif
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <net/if.h>
 
 #include <arpa/inet.h>
+#if !defined(__redox__)
 #include <arpa/nameser.h>
+#endif
 @NAMESER_COMPAT_INCLUDE@
 
 #ifndef __GI_SCANNER__
diff -ruwN source-old/gio/gthreadedresolver.c source/gio/gthreadedresolver.c
--- source-old/gio/gthreadedresolver.c	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/gthreadedresolver.c	2025-11-10 12:32:57.664870630 -0700
@@ -698,7 +698,7 @@
 }
 
 
-#if defined(G_OS_UNIX)
+#if defined(G_OS_UNIX) && !defined(__redox__)
 
 #if defined __BIONIC__ && !defined BIND_4_COMPAT
 /* Copy from bionic/libc/private/arpa_nameser_compat.h
@@ -1393,7 +1393,11 @@
 {
   GList *records;
 
-#if defined(G_OS_UNIX)
+#if defined(__redox__)
+  g_set_error (error, G_RESOLVER_ERROR, G_RESOLVER_ERROR_INTERNAL,
+                _("No support for resolving “%s” on redox"), rrname);
+  return NULL;
+#elif defined(G_OS_UNIX)
   gint len = 512;
   gint herr;
   GByteArray *answer;
diff -ruwN source-old/gio/gunixconnection.c source/gio/gunixconnection.c
--- source-old/gio/gunixconnection.c	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/gunixconnection.c	2025-11-10 12:36:14.017908505 -0700
@@ -496,7 +496,7 @@
   GSocket *socket;
   gint n;
   gssize num_bytes_read;
-#ifdef __linux__
+#if defined(__linux__) || defined(__redox__)
   gboolean turn_off_so_passcreds;
 #endif
 
@@ -512,7 +512,7 @@
    * already. We also need to turn it off when we're done.  See
    * #617483 for more discussion.
    */
-#ifdef __linux__
+#if defined(__linux__) || defined(__redox__)
   {
     gint opt_val;
 
@@ -626,7 +626,7 @@
 
  out:
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__redox__)
   if (turn_off_so_passcreds)
     {
       if (!g_socket_set_option (socket,
diff -ruwN source-old/gio/gunixmounts.c source/gio/gunixmounts.c
--- source-old/gio/gunixmounts.c	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/gunixmounts.c	2025-11-10 12:32:57.665218112 -0700
@@ -1114,7 +1114,7 @@
 }
 
 /* QNX {{{2 */
-#elif defined (HAVE_QNX)
+#elif defined (HAVE_QNX) || defined(__redox__)
 
 static char *
 get_mtab_monitor_file (void)
@@ -1758,6 +1758,28 @@
   return NULL;
 }
 
+#elif defined(__redox__)
+
+static GUnixMountPoint **
+_g_unix_mount_points_get_from_file (const char *table_path,
+                                    uint64_t   *time_read_out,
+                                    size_t     *n_points_out)
+{
+  /* Not supported on Redox. */
+  if (time_read_out != NULL)
+    *time_read_out = 0;
+  if (n_points_out != NULL)
+    *n_points_out = 0;
+  return NULL;
+}
+
+static GList *
+_g_get_unix_mount_points (void)
+{
+  /* Not supported on Redox. */
+  return NULL;
+}
+
 /* Common code {{{2 */
 #else
 #error No g_get_mount_table() implementation for system
diff -ruwN source-old/gio/meson.build source/gio/meson.build
--- source-old/gio/meson.build	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/meson.build	2025-11-10 12:32:57.665641216 -0700
@@ -18,7 +18,7 @@
 
 gnetworking_h_nameser_compat_include = ''
 
-if host_system not in ['windows', 'android']
+if host_system not in ['windows', 'android', 'redox']
   # Don't check for C_IN on Android since it does not define it in public
   # headers, we define it ourselves wherever necessary
   if not cc.compiles('''#include <sys/types.h>
@@ -39,7 +39,7 @@
 
 network_libs = [ ]
 network_args = [ ]
-if host_system != 'windows'
+if host_system not in ['windows', 'redox']
   # res_query()
   res_query_test = '''#include <resolv.h>
                       int main (int argc, char ** argv) {
diff -ruwN source-old/gio/tests/gdbus-server-auth.c source/gio/tests/gdbus-server-auth.c
--- source-old/gio/tests/gdbus-server-auth.c	2025-11-03 05:42:10.000000000 -0700
+++ source/gio/tests/gdbus-server-auth.c	2025-11-10 12:36:39.750972219 -0700
@@ -243,7 +243,7 @@
     }
   else    /* We should prefer EXTERNAL whenever it is allowed. */
     {
-#ifdef __linux__
+#if defined(__linux__) || defined(__redox__)
       /* We know that both GDBus and libdbus support full credentials-passing
        * on Linux. */
       g_assert_cmpint (uid, ==, getuid ());
diff -ruwN source-old/glib/glib-unix.c source/glib/glib-unix.c
--- source-old/glib/glib-unix.c	2025-11-03 05:42:10.000000000 -0700
+++ source/glib/glib-unix.c	2025-11-10 12:32:57.665846181 -0700
@@ -74,6 +74,10 @@
 #include <sys/user.h>
 #endif  /* defined (__FreeBSD__ )*/
 
+#if defined(__redox__)
+#include <sys/redox.h>
+#endif
+
 G_STATIC_ASSERT (sizeof (ssize_t) == GLIB_SIZEOF_SSIZE_T);
 G_STATIC_ASSERT (G_ALIGNOF (gssize) == G_ALIGNOF (ssize_t));
 G_STATIC_ASSERT (G_SIGNEDNESS_OF (ssize_t) == 1);
@@ -1004,6 +1008,20 @@
   g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_NOSYS,
                "g_unix_fd_query_path() not supported on HURD");
   return NULL;
+#elif defined(__redox__)
+  char file_path[PATH_MAX] = {0};
+
+  if (redox_fpath (fd, file_path, PATH_MAX) < 0)
+    {
+      int errsv = errno;
+
+      g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errsv),
+                   "Error querying file information for FD %d: %s",
+                   fd, g_strerror (errsv));
+      return NULL;
+    }
+
+  return g_strdup (file_path);
 #else
   #error "g_unix_fd_query_path() not supported on this platform"
 #endif