#ifdef FILE
int _filbuf(FILE *);
int _flsbuf(u_char, FILE *);
int fclose(FILE *);
int fflush(FILE *);
int fgetc(FILE *);
int fprintf(FILE *, const char *, ...);
int fputc(int, FILE *);
int fputs(const char *, FILE *);
u_int fread(void *, u_int, u_int, FILE *);
int fseek(FILE *, long, int);
u_int fwrite(const void *, u_int, u_int, FILE *);
int pclose(FILE *);
void rewind(FILE *);
void setbuf(FILE *, char *);
int setlinebuf(FILE *);
int ungetc(int, FILE *);
int vfprintf(FILE *, const char *, ...);
int vprintf(const char *, ...);
#endif
#if __GNUC__ <= 1
int read(int, char *, u_int);
int write(int, char *, u_int);
#endif
long a64l(const char *);
#ifdef __STDC__
struct sockaddr;
#endif
int accept(int, struct sockaddr *, int *);
int bind(int, struct sockaddr *, int);
int bcmp(const void *, const void *, u_int);
void bcopy(const void *, void *, u_int);
void bzero(void *, int);
int chroot(const char *);
int close(int);
void closelog(void);
int connect(int, struct sockaddr *, int);
char *crypt(const char *, const char *);
int daemon(int, int);
int fchmod(int, int);
int fchown(int, int, int);
void endgrent(void);
void endpwent(void);
void endservent(void);
#ifdef __STDC__
struct ether_addr;
#endif
struct ether_addr *ether_aton(const char *);
int flock(int, int);
#ifdef __STDC__
struct stat;
#endif
int fstat(int, struct stat *);
#ifdef __STDC__
struct statfs;
#endif
int fstatfs(int, struct statfs *);
int fsync(int);
#ifdef __STDC__
struct timeb;
#endif
int ftime(struct timeb *);
int ftruncate(int, off_t);
int getdtablesize(void);
long gethostid(void);
int gethostname(char *, int);
int getopt(int, char * const *, const char *);
int getpagesize(void);
char *getpass(char *);
int getpeername(int, struct sockaddr *, int *);
int getpriority(int, int);
#ifdef __STDC__
struct rlimit;
#endif
int getrlimit(int, struct rlimit *);
int getsockname(int, struct sockaddr *, int *);
int getsockopt(int, int, int, char *, int *);
#ifdef __STDC__
struct timeval;
struct timezone;
#endif
int gettimeofday(struct timeval *, struct timezone *);
char *getusershell(void);
char *getwd(char *);
int initgroups(const char *, int);
int ioctl(int, int, caddr_t);
int iruserok(u_long, int, char *, char *);
int isatty(int);
int killpg(int, int);
int listen(int, int);
#ifdef __STDC__
struct utmp;
#endif
void login(struct utmp *);
int logout(const char *);
off_t lseek(int, off_t, int);
int lstat(const char *, struct stat *);
int mkstemp(char *);
char *mktemp(char *);
int munmap(caddr_t, int);
void openlog(const char *, int, int);
void perror(const char *);
int printf(const char *, ...);
int puts(const char *);
long random(void);
int readlink(const char *, char *, int);
#ifdef __STDC__
struct iovec;
#endif
int readv(int, struct iovec *, int);
int recv(int, char *, u_int, int);
int recvfrom(int, char *, u_int, int, struct sockaddr *, int *);
int rename(const char *, const char *);
int rcmd(char **, u_short, char *, char *, char *, int *);
int rresvport(int *);
int send(int, char *, u_int, int);
int sendto(int, char *, u_int, int, struct sockaddr *, int);
int setenv(const char *, const char *, int);
int seteuid(int);
int setpriority(int, int, int);
int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
int setpgrp(int, int);
void setpwent(void);
int setrlimit(int, struct rlimit *);
void setservent(int);
int setsockopt(int, int, int, char *, int);
int shutdown(int, int);
int sigblock(int);
void (*signal (int, void (*) (int))) (int);
int sigpause(int);
int sigsetmask(int);
#ifdef __STDC__
struct sigvec;
#endif
int sigvec(int, struct sigvec *, struct sigvec*);
int snprintf(char *, size_t, const char *, ...);
int socket(int, int, int);
int socketpair(int, int, int, int *);
int symlink(const char *, const char *);
void srandom(int);
int sscanf(char *, const char *, ...);
int stat(const char *, struct stat *);
int statfs(char *, struct statfs *);
char *strerror(int);
int strcasecmp(const char *, const char *);
#ifdef __STDC__
struct tm;
#endif
int strftime(char *, int, char *, struct tm *);
int strncasecmp(const char *, const char *, int);
long strtol(const char *, char **, int);
void sync(void);
void syslog(int, const char *, ...);
int system(const char *);
long tell(int);
time_t time(time_t *);
char *timezone(int, int);
int tolower(int);
int toupper(int);
int truncate(char *, off_t);
void unsetenv(const char *);
int vfork(void);
int vsprintf(char *, const char *, ...);
int writev(int, struct iovec *, int);
#ifdef __STDC__
struct rusage;
#endif
int utimes(const char *, struct timeval *);
#if __GNUC__ <= 1
int wait(int *);
pid_t wait3(int *, int, struct rusage *);
#endif
#ifdef SIG_ERR
#undef SIG_ERR
#define SIG_ERR (void (*)(int))-1
#undef SIG_DFL
#define SIG_DFL (void (*)(int))0
#undef SIG_IGN
#define SIG_IGN (void (*)(int))1
#ifdef KERNEL
#undef SIG_CATCH
#define SIG_CATCH (void (*)(int))2
#endif
#undef SIG_HOLD
#define SIG_HOLD (void (*)(int))3
#endif