diff --git a/src/main.zig b/src/main.zig
index 5e2e5fd..6b50b2c 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,11 +1,18 @@
 const psp = @import("psp/pspsdk.zig");
+pub const os = @import("psp/pspos.zig");
+pub const panic = @import("psp/utils/debug.zig").panic;
 
-comptime{
-    asm(psp.module_info("Zig PSP", 0, 1, 0));
+const std = @import("std");
+
+comptime {
+    asm (psp.module_info("Zig PSP", 0, 1, 0));
 }
 
 pub fn main() !void {
     psp.utils.enableHBCB();
     psp.debug.screenInit();
     psp.debug.print("Hi!");
+
+    var f = try std.fs.cwd().openFile("hello.zig", .{.write = true});
+    std.debug.warn("{}", .{f.isTty()});
 }
diff --git a/src/psp/os/bits.zig b/src/psp/os/bits.zig
index 8439457..8cc1a50 100644
--- a/src/psp/os/bits.zig
+++ b/src/psp/os/bits.zig
@@ -8,6 +8,7 @@ pub const timespec = struct{
 };
 
 pub const fd_t = usize;
+pub const ino_t = u64;
 pub const mode_t = u32;
 
 pub const PATH_MAX = 1024;
@@ -167,6 +168,11 @@ pub const O_NOWAIT = 0x8000;
 pub const SEEK_SET = 0;
 pub const O_APPEND = 0x0100;
 pub const O_CLOEXEC = 0; //Don't do anything
+pub const O_NOCTTY = 0; //Don't do anything
+pub const R_OK = 1;
+pub const W_OK = 1;
+pub const F_OK = 1;
+pub const X_OK = 1;
 
 pub const LOCK_SH = 1;
 pub const LOCK_EX = 2;
@@ -206,3 +212,51 @@ pub const AT_STATX_DONT_SYNC = 0x4000;
 
 /// Apply to the entire subtree
 pub const AT_RECURSIVE = 0x8000;
+
+usingnamespace @import("../sdk/pspiofilemgr.zig");
+usingnamespace @import("../sdk/psptypes.zig");
+pub const Stat = struct {
+    mode: u32,
+    st_attr: c_uint,
+    size: u64,
+    st_ctime: ScePspDateTime,
+    st_atime: ScePspDateTime,
+    st_mtime: ScePspDateTime,
+    st_private: [6]c_uint,
+    ino: ino_t,
+
+    pub fn atime(self: Stat) timespec {
+        return timespec{.tv_sec = self.st_atime.second, .tv_nsec = @bitCast(isize, self.st_atime.microsecond)*1000};
+    }
+    pub fn mtime(self: Stat) timespec {
+        return timespec{.tv_sec = self.st_mtime.second, .tv_nsec = @bitCast(isize, self.st_mtime.microsecond)*1000};
+    }
+    pub fn ctime(self: Stat) timespec {
+        return timespec{.tv_sec = self.st_ctime.second, .tv_nsec = @bitCast(isize, self.st_ctime.microsecond)*1000};
+    }
+};
+
+
+pub const S_IFBLK = 524288;
+pub const S_IFCHR = 262144;
+pub const S_IFIFO = 131072;
+pub const S_IFSOCK = 65536;
+pub const S_IFMT = 61440;
+pub const S_IFLNK = 16384;
+pub const S_IFDIR = 4096;
+pub const S_IFREG = 8192;
+pub const S_ISUID = 2048;
+pub const S_ISGID = 1024;
+pub const S_ISVTX = 512;
+pub const S_IRWXU = 448;
+pub const S_IRUSR = 256;
+pub const S_IWUSR = 128;
+pub const S_IXUSR = 64;
+pub const S_IRWXG = 56;
+pub const S_IRGRP = 32;
+pub const S_IWGRP = 16;
+pub const S_IXGRP = 8;
+pub const S_IRWXO = 7;
+pub const S_IROTH = 4;
+pub const S_IWOTH = 2;
+pub const S_IXOTH = 1;
diff --git a/src/psp/os/system.zig b/src/psp/os/system.zig
index 88900a9..fc83e68 100644
--- a/src/psp/os/system.zig
+++ b/src/psp/os/system.zig
@@ -3,12 +3,12 @@ usingnamespace @import("fdman.zig");
 usingnamespace @import("cwd.zig");
 pub var errno : u32 = 0;
 
-fn pspErrToErrno(code: u32) i32{
+fn pspErrToErrno(code: u64) i32{
     if ((code & 0x80010000) == 0x80010000) {
-        errno = code & 0xFFFF;
+        errno = @truncate(u32, code & 0xFFFF);
         return -1;
     }
-    return @bitCast(i32, code);
+    return @bitCast(i32, @truncate(u32, code));
 }
 
 pub fn getErrno(r: c_int) usize {
@@ -148,3 +148,128 @@ pub fn close(fd: fd_t) c_int {
     errno = EBADF;
     return -1;
 }
+
+pub fn unlinkat(dir: fd_t, path: [*:0]const u8, flags: u32) c_int{
+    if(dir != AT_FDCWD){
+        @panic("Non-FDCWD Not Supported");
+    }
+
+    var dest : [PATH_MAX + 1]u8 = undefined;
+
+    var stat = __psp_path_absolute(path, dest[0..], PATH_MAX);
+    if(stat < 0) {
+        errno = ENAMETOOLONG;
+        return -1;
+    }
+
+    var fdStat: SceIoStat = undefined;
+    _ = sceIoGetstat(dest[0..], &fdStat);
+
+    if(fdStat.st_mode & @enumToInt(IOAccessModes.FIO_S_IFDIR) != 0){
+        return pspErrToErrno(@bitCast(u32, sceIoRmdir(dest[0..])));
+    }else{
+        return pspErrToErrno(@bitCast(u32, sceIoRemove(dest[0..])));
+    }
+
+}
+
+pub fn mkdirat(dir: fd_t, path: [*:0]const u8, mode: u32) c_int{
+    if(dir != AT_FDCWD){
+        @panic("Non-FDCWD Not Supported");
+    }
+
+    var dest : [PATH_MAX + 1]u8 = undefined;
+    var stat = __psp_path_absolute(path, dest[0..], PATH_MAX);
+    if(stat < 0) {
+        errno = ENAMETOOLONG;
+        return -1;
+    }
+
+    return pspErrToErrno(@bitCast(u32, sceIoMkdir(dest[0..], mode)));
+}
+
+pub fn fstat(fd: fd_t, stat: *Stat) c_int {
+    var psp_stat : SceIoStat = undefined;
+    var dest : [PATH_MAX + 1]u8 = undefined;
+    var ret : i32 = 0;
+
+    var status = __psp_path_absolute(@ptrCast([*]const u8, &__psp_descriptormap[fd].?.filename.?), dest[0..], PATH_MAX);
+    if(status < 0) {
+        errno = ENAMETOOLONG;
+        return -1;
+    }
+
+    @memset(@ptrCast([*]u8, stat), 0, @sizeOf(Stat));
+    ret = sceIoGetstat(dest[0..], &psp_stat);
+    if (ret < 0) {
+        return pspErrToErrno(@bitCast(u32, ret));
+    }
+
+    stat.mode = @bitCast(u32, psp_stat.st_mode);
+    stat.st_attr = @as(u64, psp_stat.st_attr);
+    stat.size = @bitCast(u64, psp_stat.st_size);
+    stat.st_ctime = psp_stat.st_ctime;
+    stat.st_atime = psp_stat.st_atime;
+    stat.st_mtime = psp_stat.st_mtime;
+    stat.st_private = psp_stat.st_private;
+
+    return 0;
+}
+
+pub fn faccessat(dir: fd_t, path: [*:0]const u8, mode: u32, flags: u32) c_int{
+    if(dir != AT_FDCWD){
+        @panic("Non-FDCWD Not Supported");
+    }
+
+    var dest : [PATH_MAX + 1]u8 = undefined;
+    var stat = __psp_path_absolute(path, dest[0..], PATH_MAX);
+    if(stat < 0) {
+        errno = ENAMETOOLONG;
+        return -1;
+    }
+
+    var fdStat: SceIoStat = undefined;
+    var v = sceIoGetstat(dest[0..], &fdStat);
+    if(v != 0){
+        return pspErrToErrno(@bitCast(u32, v));
+    }
+
+    if(fdStat.st_mode & S_IFDIR != 0){
+        return 0;
+    } 
+    if (flags & W_OK == 0){
+        return 0;
+    }
+
+    errno = EACCES;
+    return -1;
+}
+
+pub fn lseek(fd: fd_t, off: i64, whence: c_int) c_int{
+    if(!__psp_fdman_fdValid(fd)){
+        errno = EBADF;
+        return -1;
+    }
+
+    switch(__psp_descriptormap[fd].?.ftype){
+        .File => {
+            std.debug.warn("{}", .{whence});
+            //If you need to seek past 4GB, you have a real problem.
+            return pspErrToErrno(@bitCast(u32, sceIoLseek32(__psp_descriptormap[fd].?.sce_descriptor, @truncate(c_int, off), whence)));
+        },
+
+        else => {
+            errno = EBADF;
+            return -1;
+        }
+    }
+}
+
+pub fn isatty(fd: fd_t) c_int{
+    if(!__psp_fdman_fdValid(fd)){
+        errno = EBADF;
+        return -1;
+    }
+
+    return @intCast(c_int, @boolToInt(__psp_fdman_fdType(fd, __psp_fdman_type.Tty)));
+}
diff --git a/src/psp/sdk/pspiofilemgr.zig b/src/psp/sdk/pspiofilemgr.zig
index dad7423..90c015d 100644
--- a/src/psp/sdk/pspiofilemgr.zig
+++ b/src/psp/sdk/pspiofilemgr.zig
@@ -48,7 +48,7 @@ pub const PSP_O_NOWAIT = 0x8000;
 pub const PSP_SEEK_SET = 0;
 pub const PSP_O_APPEND = 0x0100;
 
-pub const struct_SceIoStat = extern struct {
+pub const SceIoStat = extern struct {
     st_mode: SceMode,
     st_attr: c_uint,
     st_size: SceOff,
@@ -57,7 +57,7 @@ pub const struct_SceIoStat = extern struct {
     st_mtime: ScePspDateTime,
     st_private: [6]c_uint,
 };
-pub const SceIoStat = struct_SceIoStat;
+
 pub const struct_SceIoDirent = extern struct {
     d_stat: SceIoStat,
     d_name: [256]u8,
@@ -79,12 +79,12 @@ pub extern fn sceIoRead(fd: SceUID, data: ?*c_void, size: SceSize) c_int;
 pub extern fn sceIoReadAsync(fd: SceUID, data: ?*c_void, size: SceSize) c_int;
 pub extern fn sceIoWrite(fd: SceUID, data: ?*const c_void, size: SceSize) c_int;
 pub extern fn sceIoWriteAsync(fd: SceUID, data: ?*const c_void, size: SceSize) c_int;
-pub extern fn sceIoLseek(fd: SceUID, offset: SceOff, whence: c_int) SceOff;
+pub extern fn sceIoLseek(fd: SceUID, offset: SceOff, whence: c_int) i64;
 pub extern fn sceIoLseekAsync(fd: SceUID, offset: SceOff, whence: c_int) c_int;
 pub extern fn sceIoLseek32(fd: SceUID, offset: c_int, whence: c_int) c_int;
 pub extern fn sceIoLseek32Async(fd: SceUID, offset: c_int, whence: c_int) c_int;
 pub extern fn sceIoRemove(file: [*c]const u8) c_int;
-pub extern fn sceIoMkdir(dir: [*c]const u8, mode: SceMode) c_int;
+pub extern fn sceIoMkdir(dir: [*c]const u8, mode: u32) c_int;
 pub extern fn sceIoRmdir(path: [*c]const u8) c_int;
 pub extern fn sceIoChdir(path: [*c]const u8) c_int;
 pub extern fn sceIoRename(oldname: [*c]const u8, newname: [*c]const u8) c_int;
diff --git a/src/psp/utils/module.zig b/src/psp/utils/module.zig
index 4bc8ee8..26ac436 100644
--- a/src/psp/utils/module.zig
+++ b/src/psp/utils/module.zig
@@ -42,7 +42,7 @@ pub fn _module_main_thread(argc: SceSize, argv: ?*c_void) callconv(.C) c_int {
 
                 print("ERROR CAUGHT: ");
                 print(@errorName(err));
-                print("Exiting in 10 seconds...");
+                print("\nExiting in 10 seconds...");
                 
                 exitErr();
                 return 1;