《UNIX環境高階程式設計》中涉及到一段程式碼，ourhdr.h檔案，以後備用！
#ifndef __ourhdr_h #define __ourhdr_h #include <errno.h> /*for definition of errno */ #include <stdarg.h> /*ANSI C header file */ #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 directoris */ 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)); /* {Prog recvfd_svr4 recvfd_43bsd} */ int send_fd(int, int); /* {Progs sendfd_svr4 se dfd_43bsd} */ int send_err(int, int, const char *);/* {Prog senderr} */ int serv_listen(const char *); /* {Progs servlisten_svr4 servli ten_4 4bsd} */ int serv_accept(int, uid_t *); /* {Progs servaccept_svr4 servac ept_4 4bsd} */ int cli_conn(const char *); /* {Progs cliconn_svr4 cliconn_4 bsd} */ int buf_args(char *, int (*func)(int, char **)); /* {Prog bufargs} */ int ptym_open(char *); /* {Progs ptyopen_svr4 p yopen_44bsd} */ int ptys_open(int, char *); /* {Progs ptyopen_svr4 ptyopen_4 bsd} */ #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_condition } */ void TELL_PARENT(pid_t); void TELL_CHILD(pid_t); void WAIT_PARENT(void); void WAIT_CHILD(void); #endif /* __ourhdr_h */ static void err_doit(int, const char*, va_list); char *pname = NULL; /* caller can set this from argv[0]*/ /* Nonfatal error realated 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, fmt, ap); va_end(ap); return; } /* 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, 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, fmt, ap); va_end(ap); abort(); /* dump core and terminate */ exit(1); /* shouldn't get here */ } /* Nofatal error related 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, fmt, ap); va_end(ap); return; } /* Fatal error related 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, fmt, ap); va_end(ap); exit(1); } /* print a message and return to caller. caller specifies "errnoflag". */ static void err_doit(int errnoflag, const char *fmt, va_list ap) { int errno_save; char buf[MAXLINE]; errno_save = errno; /* value caller might want printed */ vsprintf(buf, fmt, ap); if (errnoflag) sprintf(buf+strlen(buf),": %s", strerror(errno_save)); strcat(buf, "\n"); fflush(stdout); /* in case stdout and stderr are the same */ fputs(buf, stderr); fflush(NULL); /*flushes and stdio output streams */ return; }