《Unix网络编程》第一卷第三版unp.h

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/* include unph */

/* Our own header. Tabs are set for 4 spaces, not 8 */

#ifndef __unp_h

#define __unp_h

#include "../config.h" /* configuration options for current OS */

/* "../config.h" is generated by configure */

/* If anything changes in the following list of #includes, must change

acsite.m4 also, for configure's tests. */

#include <sys/types.h> /* basic system data types */

#include <sys/socket.h> /* basic socket definitions */

#if TIME_WITH_SYS_TIME

#include <sys/time.h> /* timeval{} for select() */

#include <time.h> /* timespec{} for pselect() */

#else

#if HAVE_SYS_TIME_H

#include <sys/time.h> /* includes <time.h> unsafely */

#else

#include <time.h> /* old system? */

#endif

#endif

#include <netinet/in.h> /* sockaddr_in{} and other Internet defns */

#include <arpa/inet.h> /* inet(3) functions */

#include <errno.h>

#include <fcntl.h> /* for nonblocking */

#include <netdb.h>

#include <signal.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/stat.h> /* for S_xxx file mode constants */

#include <sys/uio.h> /* for iovec{} and readv/writev */

#include <unistd.h>

#include <sys/wait.h>

#include <sys/un.h> /* for Unix domain sockets */

#ifdef HAVE_SYS_SELECT_H

# include <sys/select.h> /* for convenience */

#endif

#ifdef HAVE_SYS_SYSCTL_H

#ifdef HAVE_SYS_PARAM_H

# include <sys/param.h> /* OpenBSD prereq for sysctl.h */