header file

/* Our own header, to be included *after* all standard system headers */

#ifndef __ourhdr_h
#define __ourhdr_h

#include    <sys/types.h>   /* required for some of our prototypes */
#include    <stdio.h>       /* for convenience */
#include    <stdlib.h>      /* for convenience */
#include    <string.h>      /* for convenience */
#include    <unistd.h>      /* for convenience */

#define MAXLINE 4096            /* max line length */

#define FILE_MODE   (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)
                    /* default file access permissions for new files */
#define DIR_MODE    (FILE_MODE | S_IXUSR | S_IXGRP | S_IXOTH)
                    /* default permissions for new directories */

typedef void    Sigfunc(int);   /* for signal handlers */

                    /* 4.3BSD Reno <signal.h> doesn't define SIG_ERR */
#if defined(SIG_IGN) && !defined(SIG_ERR)
#define SIG_ERR ((Sigfunc *)-1)
#endif

#define min(a,b)    ((a) < (b) ? (a) : (b))
#define max(a,b)    ((a) > (b) ? (a) : (b))

                    /* prototypes for our own functions */
char    *path_alloc(int *);         /* {Prog pathalloc} */
int      open_max(void);            /* {Prog openmax} */
void     clr_fl(int, int);          /* {Prog setfl} */
void     set_fl(int, int);          /* {Prog setfl} */
void     pr_exit(int);              /* {Prog prexit} */
void     pr_mask(const char *);     /* {Prog prmask} */
Sigfunc *signal_intr(int, Sigfunc *);/* {Prog signal_intr_function} */

int      tty_cbreak(int);           /* {Prog raw} */
int      tty_raw(int);              /* {Prog raw} */
int      tty_reset(int);            /* {Prog raw} */
void     tty_atexit(void);          /* {Prog raw} */
#ifdef  ECHO    /* only if <termios.h> has been included */
struct termios  *tty_termios(void); /* {Prog raw} */
#endif

void     sleep_us(unsigned int);    /* {Ex sleepus} */
ssize_t  readn(int, void *, size_t);/* {Prog readn} */
ssize_t  writen(int, const void *, size_t);/* {Prog writen} */
int      daemon_init(void);         /* {Prog daemoninit} */

int      s_pipe(int *);             /* {Progs svr4_spipe bsd_spipe} */
int      recv_fd(int, ssize_t (*func)(int, const void *, size_t));
                                    /* {Progs recvfd_svr4 recvfd_43bsd} */
int      send_fd(int, int);         /* {Progs sendfd_svr4 sendfd_43bsd} */
int      send_err(int, int, const char *);/* {Prog senderr} */
int      serv_listen(const char *); /* {Progs servlisten_svr4 servlisten_44bsd} */
int      serv_accept(int, uid_t *); /* {Progs servaccept_svr4 servaccept_44bsd} */
int      cli_conn(const char *);    /* {Progs cliconn_svr4 cliconn_44bsd} */
int      buf_args(char *, int (*func)(int, char **));
                                    /* {Prog bufargs} */

int      ptym_open(char *);         /* {Progs ptyopen_svr4 ptyopen_44bsd} */
int      ptys_open(int, char *);    /* {Progs ptyopen_svr4 ptyopen_44bsd} */
#ifdef  TIOCGWINSZ
pid_t    pty_fork(int *, char *, const struct termios *,
                  const struct winsize *);  /* {Prog ptyfork} */
#endif

int     lock_reg(int, int, int, off_t, int, off_t);
                                    /* {Prog lockreg} */
#define read_lock(fd, offset, whence, len) \
            lock_reg(fd, F_SETLK, F_RDLCK, offset, whence, len)
#define readw_lock(fd, offset, whence, len) \
            lock_reg(fd, F_SETLKW, F_RDLCK, offset, whence, len)
#define write_lock(fd, offset, whence, len) \
            lock_reg(fd, F_SETLK, F_WRLCK, offset, whence, len)
#define writew_lock(fd, offset, whence, len) \
            lock_reg(fd, F_SETLKW, F_WRLCK, offset, whence, len)
#define un_lock(fd, offset, whence, len) \
            lock_reg(fd, F_SETLK, F_UNLCK, offset, whence, len)

pid_t   lock_test(int, int, off_t, int, off_t);
                                    /* {Prog locktest} */

#define is_readlock(fd, offset, whence, len) \
            lock_test(fd, F_RDLCK, offset, whence, len)
#define is_writelock(fd, offset, whence, len) \
            lock_test(fd, F_WRLCK, offset, whence, len)

void    err_dump(const char *, ...);    /* {App misc_source} */
void    err_msg(const char *, ...);
void    err_quit(const char *, ...);
void    err_ret(const char *, ...);
void    err_sys(const char *, ...);

void    log_msg(const char *, ...);     /* {App misc_source} */
void    log_open(const char *, int, int);
void    log_quit(const char *, ...);
void    log_ret(const char *, ...);
void    log_sys(const char *, ...);

void    TELL_WAIT(void);        /* parent/child from {Sec race_conditions} */
void    TELL_PARENT(pid_t);
void    TELL_CHILD(pid_t);
void    WAIT_PARENT(void);
void    WAIT_CHILD(void);

#endif  /* __ourhdr_h */