diff --git a/kernel/src/sys/stat.cpp b/kernel/src/sys/stat.cpp
index 49a5ad10..8233e715 100644
--- a/kernel/src/sys/stat.cpp
+++ b/kernel/src/sys/stat.cpp
@@ -16,6 +16,9 @@ struct stat // FIXME: This struct is quite stubbed out.
     int st_dev; // FIXME: Implement this.
     uid_t st_uid;
     gid_t st_gid;
+    time_t st_atime; // Not implemented.
+    time_t st_mtime; // Not implemented.
+    time_t st_ctime; // Not implemented.
 };
 
 void do_stat(Context* context, VFS::Node* node, struct stat* buf)
diff --git a/libs/libc/include/errno.h b/libs/libc/include/errno.h
index 239b0c42..3d3029c5 100644
--- a/libs/libc/include/errno.h
+++ b/libs/libc/include/errno.h
@@ -8,6 +8,7 @@ extern int errno;
 #define ENOENT 2      // No such file or directory
 #define ESRCH 3       // No such process
 #define EINTR 4       // Interrupted system call. Not implemented.
+#define EIO 5         // Input/output error. Not implemented.
 #define E2BIG 7       // Argument list too long
 #define ENOEXEC 8     // Exec format error
 #define EBADF 9       // Bad file descriptor
@@ -21,8 +22,10 @@ extern int errno;
 #define EINVAL 22     // Invalid argument
 #define EMFILE 24     // Too many open files
 #define ENOTTY 25     // Inappropriate ioctl for device
+#define EFBIG 27      // File too large. Not implemented.
 #define ENOSPC 28     // No space left on device
 #define EPIPE 32      // Broken pipe. Not implemented.
+#define EDOM 33       // Numerical argument out of domain. Not implemented.
 #define ERANGE 34     // Numerical result out of range
 #define ENOSYS 38     // Function not implemented
 #define ENOTSUP 95    // Operation not supported
diff --git a/libs/libc/include/stdio.h b/libs/libc/include/stdio.h
index 0ceec611..6157c1b3 100644
--- a/libs/libc/include/stdio.h
+++ b/libs/libc/include/stdio.h
@@ -142,6 +142,7 @@ extern "C"
     int vsnprintf(char* str, size_t max, const char* format, va_list ap);
 
     int sscanf(const char*, const char*, ...); // Not implemented.
+    int fscanf(FILE*, const char*, ...);       // Not implemented.
 
     /* Writes the string str followed by a trailing newline to stdout. */
     int puts(const char* str);
diff --git a/libs/libc/include/stdlib.h b/libs/libc/include/stdlib.h
index 261c2106..ab7dd870 100644
--- a/libs/libc/include/stdlib.h
+++ b/libs/libc/include/stdlib.h
@@ -109,6 +109,11 @@ extern "C"
 
     void qsort(void*, size_t, size_t, int (*)(const void*, const void*)); // Not implemented.
 
+    size_t mbstowcs(wchar_t* dest, const char* src,
+                    size_t n); // Not implemented.
+
+    char* mktemp(char* base); // Not implemented.
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libs/libc/include/sys/param.h b/libs/libc/include/sys/param.h
new file mode 100644
index 00000000..e69de29b
diff --git a/libs/libc/include/sys/stat.h b/libs/libc/include/sys/stat.h
index e96c766f..f45710d1 100644
--- a/libs/libc/include/sys/stat.h
+++ b/libs/libc/include/sys/stat.h
@@ -12,6 +12,9 @@ struct stat // FIXME: This struct is quite stubbed out.
     int st_dev; // Not implemented.
     uid_t st_uid;
     gid_t st_gid;
+    time_t st_atime; // Not implemented.
+    time_t st_mtime; // Not implemented.
+    time_t st_ctime; // Not implemented.
 };
 
 /* Type of file. */
@@ -61,6 +64,9 @@ extern "C"
     /* Returns information about the file pointed at path in buf. */
     int stat(const char* pathname, struct stat* buf);
 
+    mode_t umask(mode_t cmask);                   // Not implemented.
+    int chmod(const char* pathname, mode_t mode); // Not implemented.
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libs/libc/include/time.h b/libs/libc/include/time.h
index bd544ad1..cb66f7b3 100644
--- a/libs/libc/include/time.h
+++ b/libs/libc/include/time.h
@@ -45,6 +45,7 @@ extern "C"
     struct tm* localtime(const time_t* timep);                                         // Not implemented.
     struct tm* gmtime(const time_t* timep);                                            // Not implemented.
     size_t strftime(char* str, size_t max, const char* format, const struct tm* time); // Not implemented.
+    char* ctime(const time_t* timep);                                                  // Not implemented.
 
 #ifdef __cplusplus
 }
diff --git a/libs/libc/include/unistd.h b/libs/libc/include/unistd.h
index 26bb30ce..835b989f 100644
--- a/libs/libc/include/unistd.h
+++ b/libs/libc/include/unistd.h
@@ -98,6 +98,8 @@ extern "C"
     /* Writes the current process's current working directory to buf. */
     char* getcwd(char* buf, size_t size);
 
+    int unlink(const char* path); // Not implemented.
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libs/libc/include/wchar.h b/libs/libc/include/wchar.h
new file mode 100644
index 00000000..e69de29b
diff --git a/libs/libc/src/stdio.cpp b/libs/libc/src/stdio.cpp
index 447689e8..737d0cca 100644
--- a/libs/libc/src/stdio.cpp
+++ b/libs/libc/src/stdio.cpp
@@ -59,6 +59,11 @@ extern "C"
         NOT_IMPLEMENTED("sscanf");
     }
 
+    int fscanf(FILE*, const char*, ...)
+    {
+        NOT_IMPLEMENTED("fscanf");
+    }
+
     FILE* tmpfile()
     {
         errno = ENOTSUP;
diff --git a/libs/libc/src/stdlib.cpp b/libs/libc/src/stdlib.cpp
index f6e99102..fbe7a3ba 100644
--- a/libs/libc/src/stdlib.cpp
+++ b/libs/libc/src/stdlib.cpp
@@ -121,4 +121,14 @@ extern "C"
     {
         NOT_IMPLEMENTED("qsort");
     }
+
+    size_t mbstowcs(wchar_t*, const char*, size_t)
+    {
+        NOT_IMPLEMENTED("mbstowcs");
+    }
+
+    char* mktemp(char*)
+    {
+        NOT_IMPLEMENTED("mktemp");
+    }
 }
\ No newline at end of file
diff --git a/libs/libc/src/string.cpp b/libs/libc/src/string.cpp
index 3e896f85..0695dbc6 100644
--- a/libs/libc/src/string.cpp
+++ b/libs/libc/src/string.cpp
@@ -261,6 +261,7 @@ extern "C"
         case ENOENT: return "No such file or directory";
         case ESRCH: return "No such process";
         case EINTR: return "Interrupted system call";
+        case EIO: return "Input/output error";
         case E2BIG: return "Argument list too long";
         case ENOEXEC: return "Exec format error";
         case EBADF: return "Bad file descriptor";
@@ -274,8 +275,10 @@ extern "C"
         case EINVAL: return "Invalid argument";
         case EMFILE: return "Too many open files";
         case ENOTTY: return "Inappropriate ioctl for device";
+        case EFBIG: return "File too large";
         case ENOSPC: return "No space left on device";
         case EPIPE: return "Broken pipe";
+        case EDOM: return "Numerical argument out of domain";
         case ERANGE: return "Numerical result out of range";
         case ENOSYS: return "Function not implemented";
         case ENOTSUP: return "Operation not supported";
diff --git a/libs/libc/src/sys/stat.cpp b/libs/libc/src/sys/stat.cpp
index 769cfb94..936a72f9 100644
--- a/libs/libc/src/sys/stat.cpp
+++ b/libs/libc/src/sys/stat.cpp
@@ -1,3 +1,4 @@
+#include <luna.h>
 #include <luna/syscall.h>
 #include <sys/stat.h>
 #include <sys/syscall.h>
@@ -18,4 +19,14 @@ extern "C"
     {
         return (int)__lc_fast_syscall2(SYS_stat, path, buf);
     }
+
+    mode_t umask(mode_t)
+    {
+        NOT_IMPLEMENTED("umask");
+    }
+
+    int chmod(const char*, mode_t)
+    {
+        NOT_IMPLEMENTED("chmod");
+    }
 }
\ No newline at end of file
diff --git a/libs/libc/src/time.cpp b/libs/libc/src/time.cpp
index 319507f0..add766b1 100644
--- a/libs/libc/src/time.cpp
+++ b/libs/libc/src/time.cpp
@@ -34,4 +34,9 @@ extern "C"
     {
         NOT_IMPLEMENTED("strftime");
     }
+
+    char* ctime(const time_t*)
+    {
+        NOT_IMPLEMENTED("ctime");
+    }
 }
\ No newline at end of file
diff --git a/libs/libc/src/unistd.cpp b/libs/libc/src/unistd.cpp
index a781339f..efaadabb 100644
--- a/libs/libc/src/unistd.cpp
+++ b/libs/libc/src/unistd.cpp
@@ -143,4 +143,9 @@ extern "C"
         strlcpy(buf, dummy_cwd, 2);
         return buf;
     }
+
+    int unlink(const char*)
+    {
+        NOT_IMPLEMENTED("unlink");
+    }
 }
\ No newline at end of file