UNIX环境高级编程的apue.h源码-APUE

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

#ifndef    _APUE_H
#define    _APUE_H

#if defined(SOLARIS)
#define _XOPEN_SOURCE    500    /* Single UNIX Specification, Version 2  for Solaris 9 */
#define CMSG_LEN(x)    _CMSG_DATA_ALIGN(sizeof(struct cmsghdr)+(x))
#elif !defined(BSD)
#define _XOPEN_SOURCE    600    /* Single UNIX Specification, Version 3 */
#endif

#include         /* some systems still require this */
#include
#include     /* for winsize */
#ifndef TIOCGWINSZ
#include
#endif
#include         /* for convenience */
#include         /* for convenience */
#include         /* for offsetof */
#include         /* for convenience */
#include         /* for convenience */
#include         /* for SIG_ERR */

#define    MAXLINE    4096            /* max line length */

/*
* Default file access permissions for new files.
*/
#define    FILE_MODE    (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)

/*
* Default permissions for new directories.
*/
#define    DIR_MODE    (FILE_MODE | S_IXUSR | S_IXGRP | S_IXOTH)

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

#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} */
long     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 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_writen} */
ssize_t     writen(int, const void *, size_t);    /* {Prog readn_writen} */
void     daemonize(const char *);            /* {Prog daemoninit} */

int         s_pipe(int *);                    /* {Progs streams_spipe sock_spipe} */
int         recv_fd(int, ssize_t (*func)(int,
                 const void *, size_t));/* {Progs recvfd_streams recvfd_sockets} */
int         send_fd(int, int);                /* {Progs sendfd_streams sendfd_sockets} */
int         send_err(int, int,
                  const char *);        /* {Prog senderr} */
int         serv_listen(const char *);        /* {Progs servlisten_streams servlisten_sockets} */
int         serv_accept(int, uid_t *);        /* {Progs servaccept_streams servaccept_sockets} */
int         cli_conn(const char *);        /* {Progs cliconn_streams cliconn_sockets} */
int         buf_args(char *, int (*func)(int,
                  char **));            /* {Prog bufargs} */

int         ptym_open(char *, int);    /* {Progs3 ptyopen_streams ptyopen_bsd ptyopen_linux} */
int         ptys_open(char *);            /* {Progs3 ptyopen_streams ptyopen_bsd ptyopen_linux} */
#ifdef    TIOCGWINSZ
pid_t     pty_fork(int *, char *, int, 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_read_lockable(fd, offset, whence, len) /
            (lock_test((fd), F_RDLCK, (offset), (whence), (len)) == 0)
#define    is_write_lockable(fd, offset, whence, len) /
            (lock_test((fd), F_WRLCK, (offset), (whence), (len)) == 0)

void    err_dump(const char *, ...);        /* {App misc_source} */
void    err_msg(const char *, ...);
void    err_quit(const char *, ...);
void    err_exit(int, 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    /* _APUE_H */