自己手敲了一遍,UNIX 高级环境编程 apue.h,经过检验貌似无错。
#ifndef _APUE_H #define _APUE_H #define _XOPEN_SOURCE 600 /* single UNIX Specification,Version 3*/ #include<sys/types.h> /*some systems still require */ #include<sys/stat.h> #include <sys/termios.h> /*for winsize */ #ifndef TIOCGWINSZ #include <sys/ioctl.h> #endif #include <stdio.h> /* for convenience */ #include <stdlib.h> /* for convenience */ #include <stddef.h> /* for offsetof */ #include <string.h> /* for convenience */ #include <unistd.h> /* for convenience */ #include <signal.h> /* 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)) /* *Prototype for our own functions */ char *path_alloc(int *); long open_max(void); void clr_fl(int ,int); void set_fl(int ,int); void pr_exit(int); void pr_mask(const char *); Sigfunc *signal_intr(int,Sigfunc *); int tty_cbreak(int); int tty_raw(int); int tty_reset(int); int tty_atexit(void); #ifdef ECHO /* only if <termios.h> has been included */ struct termios *tty_termios(void); #endif void sleep_us(unsigned int); ssize_t readn(int,void *,size_t); ssize_t writen(int,const void *,size_t); void daemonize(const char *); int s_pipe(int *); int recv_fd(int,ssize_t (*func)(int,const void*,size_t)); int send_fd(int,int); int send_err(int,int,const char *); int serv_listen(const char*); int serv_accept(int,uid_t *); int cli_conn(const char *); int bug_args(char *,int (*func)(int,char **)); int ptym_open(char *,int); int ptys_open(char *); #ifdef TIOCGWINSZ pid_t pty_fork(int *,char *,int,const struct termios *,const struct winsize *); #endif int lock_reg(int,int,int,off_t,int,off_t); #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); #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 *, ...); 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 *, ...); void log_open(const char *, ...); void log_ret(const char *, ...); void log_sys(const char *, ...); void log_sys(const char *, ...); void TELL_WAIT(void); void TELL_PARENT(pid_t); void TELL_CHILD(pid_t); void WAIT_PARENT(void); void WAIT_CHILD(void); #endif /*_APUE_H */
其中有一些函数并没有实现,比如常用的err_sys等,在后续的目录中有所实现:
例如: apueerror.h
#include "apue.h" #include <errno.h> /* for definition of errno */ #include <stdarg.h> /* ISO C variable aruments */ static void err_doit(int, int, const char *, va_list); /* * Nonfatal error related to a system call. * Print a message and return. */ void err_ret(const char *fmt, ...) { va_list ap; va_start(ap, fmt); err_doit(1, errno, fmt, ap); va_end(ap); } /* * Fatal error related to a system call. * Print a message and terminate. */ void err_sys(const char *fmt, ...) { va_list ap; va_start(ap, fmt); err_doit(1, errno, fmt, ap); va_end(ap); exit(1); } /* * Fatal error unrelated to a system call. * Error code passed as explict parameter. * Print a message and terminate. */ void err_exit(int error, const char *fmt, ...) { va_list ap; va_start(ap, fmt); err_doit(1, error, fmt, ap); va_end(ap); exit(1); } /* * Fatal error related to a system call. * Print a message, dump core, and terminate. */ void err_dump(const char *fmt, ...) { va_list ap; va_start(ap, fmt); err_doit(1, errno, fmt, ap); va_end(ap); abort(); /* dump core and terminate */ exit(1); /* shouldn't get here */ } /* * Nonfatal error unrelated to a system call. * Print a message and return. */ void err_msg(const char *fmt, ...) { va_list ap; va_start(ap, fmt); err_doit(0, 0, fmt, ap); va_end(ap); } /* * Fatal error unrelated to a system call. * Print a message and terminate. */ void err_quit(const char *fmt, ...) { va_list ap; va_start(ap, fmt); err_doit(0, 0, fmt, ap); va_end(ap); exit(1); } /* * Print a message and return to caller. * Caller specifies "errnoflag". */ static void err_doit(int errnoflag, int error, const char *fmt, va_list ap) { char buf[MAXLINE]; vsnprintf(buf, MAXLINE, fmt, ap); if (errnoflag) snprintf(buf+strlen(buf), MAXLINE-strlen(buf), ": %s", strerror(error)); strcat(buf, " "); fflush(stdout); /* in case stdout and stderr are the same */ fputs(buf, stderr); fflush(NULL); /* flushes all stdio output streams */ }