diff --git a/LibC/Makefile b/LibC/Makefile
index 39ff6620fb1..360a1ab65c0 100644
--- a/LibC/Makefile
+++ b/LibC/Makefile
@@ -20,6 +20,7 @@ LIBC_OBJS = \
        getopt.o \
        scanf.o \
        pwd.o \
+       times.o \
        entry.o
 
 OBJS = $(AK_OBJS) $(LIBC_OBJS)
diff --git a/LibC/endian.h b/LibC/endian.h
new file mode 100644
index 00000000000..7bc4e074085
--- /dev/null
+++ b/LibC/endian.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define LITTLE_ENDIAN 1234
+#define BIG_ENDIAN 4321
+#define BYTE_ORDER LITTLE_ENDIAN
+
+__END_DECLS
diff --git a/LibC/fcntl.h b/LibC/fcntl.h
index e69de29bb2d..cf679753cba 100644
--- a/LibC/fcntl.h
+++ b/LibC/fcntl.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define F_DUPFD 0
+#define F_GETFD 1
+#define F_SETFD 2
+#define F_GETFL 3
+#define F_SETFL 4
+
+__END_DECLS
diff --git a/LibC/scanf.cpp b/LibC/scanf.cpp
index 23c673c71a7..b9b4726b7b9 100644
--- a/LibC/scanf.cpp
+++ b/LibC/scanf.cpp
@@ -189,7 +189,7 @@ static int vsscanf(const char *buf, const char *s, va_list ap)
                     for (tc = s; isdigit(*s); s++);
                     strncpy (tmp, tc, s - tc);
                     tmp[s - tc] = '\0';
-                    atob ((dword*)&width, tmp, 10);
+                    atob ((uint32_t*)&width, tmp, 10);
                     s--;
                 }
             }
@@ -232,7 +232,7 @@ static int vsscanf(const char *buf, const char *s, va_list ap)
                 tmp[width] = '\0';
                 buf += width;
                 if (!noassign)
-                    atob(va_arg(ap, dword*), tmp, base);
+                    atob(va_arg(ap, uint32_t*), tmp, base);
             }
             if (!noassign)
                 ++count;
diff --git a/LibC/setjmp.cpp b/LibC/setjmp.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/LibC/setjmp.h b/LibC/setjmp.h
index e69de29bb2d..eef107ebb46 100644
--- a/LibC/setjmp.h
+++ b/LibC/setjmp.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+typedef uint32_t jmp_buf[6];
+
+int setjmp(jmp_buf);
+void longjmp(jmp_buf, int val);
+
+__END_DECLS
diff --git a/LibC/signal.cpp b/LibC/signal.cpp
index ab73f4a5e87..76442ed3ec6 100644
--- a/LibC/signal.cpp
+++ b/LibC/signal.cpp
@@ -1,5 +1,6 @@
-#include "unistd.h"
-#include "errno.h"
+#include <unistd.h>
+#include <errno.h>
+#include <signal.h>
 #include <Kernel/Syscall.h>
 
 extern "C" {
diff --git a/LibC/signal.h b/LibC/signal.h
index 73e7eeaa43a..0e36c40f194 100644
--- a/LibC/signal.h
+++ b/LibC/signal.h
@@ -4,8 +4,31 @@
 
 __BEGIN_DECLS
 
+typedef void (*__sighandler_t)(int);
+typedef __sighandler_t sighandler_t;
+
+typedef uint32_t sigset_t;
+typedef void siginfo_t;
+
+struct sigaction {
+    void (*sa_handler)(int);
+    void (*sa_sigaction)(int, siginfo_t*, void*);
+    sigset_t sa_mask;
+    int sa_flags;
+    void (*sa_restorer)(void);
+};
+
 int kill(pid_t, int sig);
 
+#define SIG_DFL ((__sighandler_t)0)
+#define SIG_ERR ((__sighandler_t)-1)
+#define SIG_IGN ((__sighandler_t)1)
+
+#define SIG_BLOCK 0
+#define SIG_UNBLOCK 1
+#define SIG_SETMASK 2
+
+
 #define SIGHUP    1
 #define SIGINT    2
 #define SIGQUIT   3 
diff --git a/LibC/stddef.h b/LibC/stddef.h
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/LibC/stdint.h b/LibC/stdint.h
new file mode 100644
index 00000000000..7deb47e5da2
--- /dev/null
+++ b/LibC/stdint.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+typedef unsigned int uint32_t;
+typedef unsigned short uint16_t;
+typedef unsigned char uint8_t;
+
+typedef signed int int32_t;
+typedef signed short int16_t;
+typedef signed char int8_t;
+
+__END_DECLS
+
diff --git a/LibC/stdio.h b/LibC/stdio.h
index c681f6ad185..8ad7074a39a 100644
--- a/LibC/stdio.h
+++ b/LibC/stdio.h
@@ -43,6 +43,7 @@ int sprintf(char* buffer, const char* fmt, ...);
 int putchar(int ch);
 void perror(const char*);
 int sscanf (const char* buf, const char* fmt, ...);
+int fscanf(FILE*, const char* fmt, ...);
 
 __END_DECLS
 
diff --git a/LibC/string.cpp b/LibC/string.cpp
index ebd632c70ba..c79ec1d0267 100644
--- a/LibC/string.cpp
+++ b/LibC/string.cpp
@@ -6,7 +6,7 @@ extern "C" {
 
 void* memset(void* dest, int c, size_t n)
 {
-    byte* bdest = (byte*)dest;
+    uint8_t* bdest = (uint8_t*)dest;
     for (; n; --n)
         *(bdest++) = c;
     return dest;
@@ -57,8 +57,8 @@ int strcmp(const char* s1, const char* s2)
 
 int memcmp(const void* v1, const void* v2, size_t n)
 {
-    auto* s1 = (const byte*)v1;
-    auto* s2 = (const byte*)v2;
+    auto* s1 = (const uint8_t*)v1;
+    auto* s2 = (const uint8_t*)v2;
     while (n-- > 0) {
         if (*s1++ != *s2++)
             return s1[-1] < s2[-1] ? -1 : 1;
diff --git a/LibC/sys/cdefs.h b/LibC/sys/cdefs.h
index 22c1525bf3e..a04364c61a7 100644
--- a/LibC/sys/cdefs.h
+++ b/LibC/sys/cdefs.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#define _POSIX_VERSION 200809L
+
 #define ALWAYS_INLINE inline __attribute__ ((always_inline))
 #define __NORETURN __attribute__ ((noreturn))
 
diff --git a/LibC/sys/param.h b/LibC/sys/param.h
index e69de29bb2d..bbc45173803 100644
--- a/LibC/sys/param.h
+++ b/LibC/sys/param.h
@@ -0,0 +1,4 @@
+#pragma once
+
+#include <endian.h>
+
diff --git a/LibC/sys/times.h b/LibC/sys/times.h
new file mode 100644
index 00000000000..dcda0d5a630
--- /dev/null
+++ b/LibC/sys/times.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+struct tms {
+    clock_t tms_utime;
+    clock_t tms_stime;
+    clock_t tms_cutime;
+    clock_t tms_cstime;
+};
+
+clock_t times(struct tms*);
+
+__END_DECLS
diff --git a/LibC/sys/types.h b/LibC/sys/types.h
index 919e4199546..425b8b333fb 100644
--- a/LibC/sys/types.h
+++ b/LibC/sys/types.h
@@ -1,34 +1,29 @@
 #pragma once
 
 #include <sys/cdefs.h>
+#include <stdint.h>
 
 __BEGIN_DECLS
 
-typedef unsigned int dword;
-typedef unsigned short word;
-typedef unsigned char byte;
-
-typedef signed int signed_dword;
-typedef signed short signed_word;
-typedef signed char signed_byte;
-
-typedef dword uid_t;
-typedef dword gid_t;
+typedef uint32_t uid_t;
+typedef uint32_t gid_t;
 typedef int pid_t;
 
-typedef dword size_t;
-typedef signed_dword ssize_t;
+typedef uint32_t size_t;
+typedef int32_t ssize_t;
 
-typedef dword ino_t;
-typedef signed_dword off_t;
+typedef uint32_t ino_t;
+typedef int32_t off_t;
 
-typedef dword dev_t;
-typedef dword mode_t;
-typedef dword nlink_t;
-typedef dword blksize_t;
-typedef dword blkcnt_t;
-typedef dword time_t;
-typedef dword suseconds_t;
+typedef uint32_t dev_t;
+typedef uint32_t mode_t;
+typedef uint32_t nlink_t;
+typedef uint32_t blksize_t;
+typedef uint32_t blkcnt_t;
+typedef uint32_t time_t;
+typedef uint32_t suseconds_t;
+
+typedef uint32_t clock_t;
 
 struct timeval {
     time_t tv_sec;
diff --git a/LibC/time.cpp b/LibC/time.cpp
index 43efb2f3645..cc66535f62e 100644
--- a/LibC/time.cpp
+++ b/LibC/time.cpp
@@ -6,13 +6,14 @@ extern "C" {
 
 time_t time(time_t* tloc)
 {
-    timeval tv;
-    if (gettimeofday(&tv) < 0)
+    struct timeval tv;
+    struct timezone tz;
+    if (gettimeofday(&tv, &tz) < 0)
         return (time_t)-1;
     return tv.tv_sec;
 }
 
-int gettimeofday(timeval* tv)
+int gettimeofday(struct timeval* tv, struct timezone*)
 {
     int rc = Syscall::invoke(Syscall::PosixGettimeofday, (dword)tv);
     __RETURN_WITH_ERRNO(rc, rc, -1);
diff --git a/LibC/time.h b/LibC/time.h
index dd1e20cf2d0..c1b61b574a4 100644
--- a/LibC/time.h
+++ b/LibC/time.h
@@ -5,7 +5,12 @@
 
 __BEGIN_DECLS
 
-int gettimeofday(timeval*);
+typedef struct timezone {
+    int tz_minuteswest;
+    int tz_dsttime;
+};
+
+int gettimeofday(struct timeval*, struct timezone* tz);
 time_t time(time_t*);
 
 __END_DECLS
diff --git a/LibC/times.cpp b/LibC/times.cpp
new file mode 100644
index 00000000000..a517e4385ef
--- /dev/null
+++ b/LibC/times.cpp
@@ -0,0 +1,8 @@
+#include <sys/times.h>
+#include <assert.h>
+
+clock_t times(struct tms*)
+{
+    assert(false);
+    return 0;
+}
diff --git a/LibC/unistd.cpp b/LibC/unistd.cpp
index 7d1b65f1af2..5ff678d561f 100644
--- a/LibC/unistd.cpp
+++ b/LibC/unistd.cpp
@@ -1,6 +1,8 @@
-#include "unistd.h"
-#include "string.h"
-#include "errno.h"
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <assert.h>
 #include <Kernel/Syscall.h>
 
 extern "C" {
@@ -78,9 +80,12 @@ pid_t getpgrp()
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
-int open(const char* path, int options)
+int open(const char* path, int options, ...)
 {
-    int rc = Syscall::invoke(Syscall::PosixOpen, (dword)path, (dword)options);
+    va_list ap;
+    va_start(ap, options);
+    int rc = Syscall::invoke(Syscall::PosixOpen, (dword)path, (dword)options, (dword)ap);
+    va_end(ap);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -169,5 +174,15 @@ off_t lseek(int fd, off_t offset, int whence)
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
+int link(const char*, const char*)
+{
+    assert(false);
+}
+
+int unlink(const char*)
+{
+    assert(false);
+}
+
 }
 
diff --git a/LibC/unistd.h b/LibC/unistd.h
index f304c555fc5..7d4eebbbdb7 100644
--- a/LibC/unistd.h
+++ b/LibC/unistd.h
@@ -22,7 +22,7 @@ gid_t getgid();
 pid_t getpid();
 pid_t tcgetpgrp(int fd);
 int tcsetpgrp(int fd, pid_t pgid);
-int open(const char* path, int options);
+int open(const char* path, int options, ...);
 ssize_t read(int fd, void* buf, size_t count);
 ssize_t write(int fd, const void* buf, size_t count);
 int close(int fd);
@@ -37,6 +37,8 @@ ssize_t readlink(const char* path, char* buffer, size_t);
 char* ttyname(int fd);
 int ttyname_r(int fd, char* buffer, size_t);
 off_t lseek(int fd, off_t, int whence);
+int link(const char* oldpath, const char* newpath);
+int unlink(const char* pathname);
 
 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
 #define WTERMSIG(status) ((status) & 0x7f)
@@ -83,6 +85,12 @@ off_t lseek(int fd, off_t, int whence);
 #define O_RDONLY 0
 #define O_WRONLY 1
 #define O_RDWR 2
+#define O_CREAT 0100
+#define O_EXCL 0200
+#define O_NOCTTY 0400
+#define O_TRUNC 01000
+#define O_APPEND 02000
+#define O_NONBLOCK 04000
 #define O_DIRECTORY 00200000
 #define O_NOFOLLOW 00400000