diff --git a/libc/include/unistd.h b/libc/include/unistd.h
new file mode 100644
index 0000000..1ada37e
--- /dev/null
+++ b/libc/include/unistd.h
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef _UNISTD_H_
+#define _UNISTD_H_
+
+#include <stddef.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <sys/sysconf.h>
+#include <linux/capability.h>
+#include <pathconf.h>
+
+__BEGIN_DECLS
+
+/* Standard file descriptor numbers. */
+#define STDIN_FILENO	0
+#define STDOUT_FILENO	1
+#define STDERR_FILENO	2
+
+/* Values for whence in fseek and lseek */
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+
+extern char **environ;
+extern __noreturn void _exit(int);
+
+extern pid_t  fork(void);
+extern pid_t  vfork(void);
+extern pid_t  getpid(void);
+extern pid_t  gettid(void);
+extern pid_t  getpgid(pid_t);
+extern int    setpgid(pid_t, pid_t);
+extern pid_t  getppid(void);
+extern pid_t  getpgrp(void);
+extern int    setpgrp(void);
+extern pid_t  setsid(void);
+extern pid_t  getsid(pid_t);
+
+extern int execv(const char *, char * const *);
+extern int execvp(const char *, char * const *);
+extern int execve(const char *, char * const *, char * const *);
+extern int execvpe(const char *, char * const *, char * const *);
+extern int execl(const char *, const char *, ...);
+extern int execlp(const char *, const char *, ...);
+extern int execle(const char *, const char *, ...);
+extern int execlpe(const char *, const char *, ...);
+extern int capget(cap_user_header_t hdrp, cap_user_data_t datap);
+extern int capset(cap_user_header_t hdrp, const cap_user_data_t datap);
+extern int prctl(int  option,  unsigned long arg2, unsigned long arg3,
+                 unsigned long arg4, unsigned long arg5);
+
+extern int nice(int);
+
+extern int setuid(uid_t);
+extern uid_t getuid(void);
+extern int seteuid(uid_t);
+extern uid_t geteuid(void);
+extern int setgid(gid_t);
+extern gid_t getgid(void);
+extern int setegid(gid_t);
+extern gid_t getegid(void);
+extern int getgroups(int, gid_t *);
+extern int setgroups(size_t, const gid_t *);
+extern int setreuid(uid_t, uid_t);
+extern int setregid(gid_t, gid_t);
+extern int setresuid(uid_t, uid_t, uid_t);
+extern int setresgid(gid_t, gid_t, gid_t);
+extern int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
+extern int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
+extern int getfsuid(uid_t);
+extern int setfsuid(uid_t);
+extern int issetugid(void);
+extern char* getlogin(void);
+extern int getlogin_r(char* name, size_t namesize);
+
+
+/* Macros for access() */
+#define R_OK  4  /* Read */
+#define W_OK  2  /* Write */
+#define X_OK  1  /* Execute */
+#define F_OK  0  /* Existence */
+
+extern int access(const char *, int);
+extern int link(const char *, const char *);
+extern int unlink(const char *);
+extern int chdir(const char *);
+extern int fchdir(int);
+extern int rmdir(const char *);
+extern int pipe(int *);
+extern int chroot(const char *);
+extern int symlink(const char *, const char *);
+extern int readlink(const char *, char *, size_t);
+extern int chown(const char *, uid_t, gid_t);
+extern int fchown(int, uid_t, gid_t);
+extern int lchown(const char *, uid_t, gid_t);
+extern char *getcwd(char *, size_t);
+
+extern int sync(void);
+
+extern int close(int);
+extern off_t lseek(int, off_t, int);
+extern loff_t lseek64(int, loff_t, int);
+
+extern ssize_t read(int, void *, size_t);
+extern ssize_t write(int, const void *, size_t);
+extern ssize_t pread(int, void *, size_t, off_t);
+extern ssize_t pwrite(int, void *, size_t, off_t);
+
+extern int dup(int);
+extern int dup2(int, int);
+extern int fcntl(int, int, ...);
+extern int ioctl(int, int, ...);
+extern int flock(int, int);
+extern int fsync(int);
+extern int fdatasync(int);
+extern int ftruncate(int, off_t);
+
+extern int pause(void);
+extern unsigned int alarm(unsigned int);
+extern unsigned int sleep(unsigned int);
+extern void usleep(unsigned long);
+
+extern int gethostname(char *, size_t);
+extern int sethostname(const char *, size_t);
+extern int getdomainname(char *, size_t);
+extern int setdomainname(const char *, size_t);
+
+extern int getdtablesize(void);
+
+extern void *__brk(void *);
+extern int brk(void *);
+extern void *sbrk(ptrdiff_t);
+
+extern int getopt(int, char * const *, const char *);
+extern char *optarg;
+extern int optind, opterr, optopt;
+
+extern int isatty(int);
+
+extern int  acct(const char*  filepath);
+
+static __inline__ int getpagesize(void) {
+  extern unsigned int __page_size;
+  return __page_size;
+}
+static __inline__ int __getpageshift(void) {
+  extern unsigned int __page_shift;
+  return __page_shift;
+}
+
+extern int sysconf(int  name);
+
+extern int daemon(int, int);
+
+/* A special syscall that is only available on the ARM, not x86 function. */
+extern int cacheflush(long start, long end, long flags);
+
+extern pid_t tcgetpgrp(int fd);
+extern int   tcsetpgrp(int fd, pid_t _pid);
+
+__END_DECLS
+
+#endif /* _UNISTD_H_ */