解析initWebs-2012.3.6

static int initWebs(int demo)
{
	struct hostent	*hp;
	struct in_addr	intaddr;
	char		host[128], dir[128], webdir[128];
	char		*cp;
	char_t		wbuf[128];

/*
 *	Initialize the socket subsystem
 */
	socketOpen();

#ifdef USER_MANAGEMENT_SUPPORT
/*
 *	Initialize the User Management database
 */
	umOpen();
	umRestore(T("umconfig.txt"));
#endif

/*
 *	Define the local Ip address, host name, default home page and the
 *	root web directory.
 */
	if (gethostname(host, sizeof(host)) < 0) {
		error(E_L, E_LOG, T("Can't get hostname"));
		return -1;
	}
	if ((hp = gethostbyname(host)) == NULL) {
		error(E_L, E_LOG, T("Can't get host address"));
		return -1;
	}
	memcpy((char *) &intaddr, (char *) hp->h_addr_list[0],
		(size_t) hp->h_length);

/*
 *	Set ../web as the root web. Modify this to suit your needs
 *	A "-demo" option to the command line will set a webdemo root
 */
	getcwd(dir, sizeof(dir));
	if ((cp = strrchr(dir, '/'))) {
		*cp = '\0';
	}
	if (demo) {
		sprintf(webdir, "%s/%s", dir, demoWeb);
	} else {
		sprintf(webdir, "%s/%s", dir, rootWeb);
	}

/*
 *	Configure the web server options before opening the web server
 */
	websSetDefaultDir(webdir);
	cp = inet_ntoa(intaddr);
	ascToUni(wbuf, cp, min(strlen(cp) + 1, sizeof(wbuf)));
	websSetIpaddr(wbuf);
	ascToUni(wbuf, host, min(strlen(host) + 1, sizeof(wbuf)));
	websSetHost(wbuf);

/*
 *	Configure the web server options before opening the web server
 */
	websSetDefaultPage(T("default.asp"));
	websSetPassword(password);

/*
 *	Open the web server on the given port. If that port is taken, try
 *	the next sequential port for up to "retries" attempts.
 */
	websOpenServer(port, retries);

/*
 * 	First create the URL handlers. Note: handlers are called in sorted order
 *	with the longest path handler examined first. Here we define the security
 *	handler, forms handler and the default web page handler.
 */
	websUrlHandlerDefine(T(""), NULL, 0, websSecurityHandler,WEBS_HANDLER_FIRST);
	websUrlHandlerDefine(T("/goform"), NULL, 0, websFormHandler, 0);
	websUrlHandlerDefine(T("/cgi-bin"), NULL, 0, websCgiHandler, 0);
	websUrlHandlerDefine(T(""), NULL, 0, websDefaultHandler,WEBS_HANDLER_LAST);

/*
 *	Now define two test procedures. Replace these with your application
 *	relevant ASP script procedures and form functions.
 */
	websAspDefine(T("aspTest"), aspTest);
	websFormDefine(T("formTest"), formTest);
	websFormDefine(T("formTest1"), formTest1);

/*
 *	Create the Form handlers for the User Management pages
 */
#ifdef USER_MANAGEMENT_SUPPORT
	formDefineUserMgmt();
#endif

/*
 *	Create a handler for the default home page
 */
	websUrlHandlerDefine(T("/"), NULL, 0, websHomePageHandler, 0);
	return 0;
}

1、int socketOpen()

int socketOpen()

int socketOpen()
{
#if (defined (CE) || defined (WIN))
    WSADATA 	wsaData;
#endif

	if (++socketOpenCount > 1) {
		return 0;
	}

#if (defined (CE) || defined (WIN))
	if (WSAStartup(MAKEWORD(1,1), &wsaData) != 0) {
		return -1;
	}
	if (wsaData.wVersion != MAKEWORD(1,1)) {
		WSACleanup();
		return -1;
	}
#endif

	socketList = NULL;
	socketMax = 0;
	socketHighestFd = -1;

	return 0;
}




註釋：
#if (defined (CE) || defined (WIN)) 表示只要定義了宏 CE 或者WIN則會執行"WSADATA     wsaData;"
static int                     socketOpenCount = 0;    /* Number of task using sockets */  使用SOCKET的數量，初始化的時候應該爲1
socketList                 socket 隊列；
socketMax                 soket最大個數；
socketHighestFd     Highest socket  fd opened  最大的socket

2、gethostname

簡述：返回本地主機的標準主機名。　　

        

#include <Winsock2.h>　　
int PASCAL FAR gethostname(char FAR *name, int namelen);

name： 一個指向將要存放主機名的緩衝區指針。
namelen：緩衝區的長度。


編輯本段註釋：

該函數把本地主機名存放入由name參數指定的緩衝區中。返回的主機名是一個以NULL結束的字符串。主機名的形式取決於Windows Sockets實現－它可能是一個簡單的主機名，或者是一個域名。然而，返回的名字必定可以在gethostbyname()和WSAAsyncGetHostByName()中使用。


返回值：

如果沒有錯誤發生，gethostname()返回0。否則它返回SOCKET_ERROR。應用程序可以通過WSAGetLastError()來得到一個特定的錯誤代碼。


錯誤代碼：

WSAEFAULT                 名字長度參數太小。　　

WSANOTINTIALISED          在應用這個API前，必須成功地調用WSAStartup()。　　

WSAENTDOWN                Windows Sockets實現檢測到了網絡子系統的錯誤。　　

WSAEINPROGRESS            一個阻塞的Windows Sockets操作正在進行。