int open(const char *path, int flags, ...{mode_t mode});
char *getcwd(char *buf, size_t size);
char *getwd(char *buf);
char *get_current_dir_name(void);
int close(int fd);
int link(const char *oldpath, const char *newpath); /* flags=AT_SYMLINK_NOFOLLOW */
int rename(const char *oldpath, const char *newpath); /* flags=AT_SYMLINK_NOFOLLOW */
int renameat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath); /* flags=AT_SYMLINK_NOFOLLOW */
int unlink(const char *path); /* flags=AT_SYMLINK_NOFOLLOW */
int unlinkat(int dirfd, const char *path, int rflags); /* flags=AT_SYMLINK_NOFOLLOW */
int creat(const char *path, mode_t mode);
int __xstat(int ver, const char *path, struct stat *buf);
int __lxstat(int ver, const char *path, struct stat *buf); /* flags=AT_SYMLINK_NOFOLLOW */
int __fxstat(int ver, int fd, struct stat *buf);
int chmod(const char *path, mode_t mode);
int fchmod(int fd, mode_t mode);
int chown(const char *path, uid_t owner, gid_t group);
int fchown(int fd, uid_t owner, gid_t group);
int lchown(const char *path, uid_t owner, gid_t group); /* flags=AT_SYMLINK_NOFOLLOW */
int __fxstatat(int ver, int dirfd, const char *path, struct stat *buf, int flags);
int fchownat(int dirfd, const char *path, uid_t owner, gid_t group, int flags);
int fchmodat(int dirfd, const char *path, mode_t mode, int flags);
int openat(int dirfd, const char *path, int flags, ...{mode_t mode});
int __openat_2(int dirfd, const char *path, int flags);
int __xmknod(int ver, const char *path, mode_t mode, dev_t *dev); /* flags=AT_SYMLINK_NOFOLLOW */
int __xmknodat(int ver, int dirfd, const char *path, mode_t mode, dev_t *dev); /* flags=AT_SYMLINK_NOFOLLOW */
int dup2(int oldfd, int newfd);
int dup(int fd);
int mkdir(const char *path, mode_t mode); /* flags=AT_SYMLINK_NOFOLLOW */
int mkdirat(int dirfd, const char *path, mode_t mode);
int rmdir(const char *path); /* flags=AT_SYMLINK_NOFOLLOW */
int chdir(const char *path);
int fchdir(int dirfd);
int fcntl(int fd, int cmd, ...{struct flock *lock});
int fork(void);
int vfork(void);
# just so we know the inums of symlinks
int symlink(const char *oldname, const char *newpath); /* flags=AT_SYMLINK_NOFOLLOW */
int symlinkat(const char *oldname, int dirfd, const char *newpath); /* flags=AT_SYMLINK_NOFOLLOW */
# needed because glibc stdio does horrible things with inline asm syscalls
FILE *fopen(const char *path, const char *mode);
int fclose(FILE *fp);
FILE *freopen(const char *path, const char *mode, FILE *stream);
int mkstemp(char *template); /* flags=AT_SYMLINK_NOFOLLOW */
# I bet you never knew there were this many of these!
int setfsuid(uid_t fsuid);
int setfsgid(gid_t fsgid);
int seteuid(uid_t euid);
int setegid(gid_t egid);
uid_t getuid(void);
uid_t geteuid(void);
gid_t getgid(void);
gid_t getegid(void);
int setresuid(uid_t ruid, uid_t euid, uid_t suid);
int setresgid(gid_t rgid, gid_t egid, gid_t sgid);
int setuid(uid_t uid);
int setgid(gid_t gid);
int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
int setreuid(uid_t ruid, uid_t euid);
int setregid(gid_t rgid, gid_t egid);
int setgroups(size_t size, const gid_t *list);