gnuserv.h

linux 操作系统下对系统资源监控程序的编写

/* -*-C-*-

 Header file for the GNU Emacs server and client C code.

 This file is part of GNU Emacs.

 Copying is permitted under those conditions described by the GNU
 General Public License.

 Copyright (C) 1989 Free Software Foundation, Inc.

 Author: Andy Norman ([e-mail]), based on 
         'etc/server.c' and 'etc/emacsclient.c' from the 18.52 GNU
         Emacs distribution.

 Please mail bugs and suggestions to the author at the above address.
*/

/* HISTORY 
 * 11-Nov-1990		bristor@simba	
 *    Added EOT stuff.
 */

/*
 * This file incorporates new features added by Bob Weiner <[e-mail]>,
 * Darrell Kindred <[e-mail]> and Arup Mukherjee <[e-mail]>.
 * Please see the note at the end of the README file for details.
 *
 * (If gnuserv came bundled with your emacs, the README file is probably
 * ../etc/gnuserv.README relative to the directory containing this file)
 */

#if 0
static char header_rcsid [] = "!Header: gnuserv.h,v 2.4 95/02/16 11:58:11 arup alpha !";
#endif

#define NO_SHORTNAMES

#define PATCHLEVEL 2

#define NO_SHORTNAMES
/* gnuserv should not be compiled using SOCKS */
#define DO_NOT_SOCKSIFY
#include <glibtop.h>
#include <glibtop/error.h>
#undef read
#undef write
#undef open
#undef close
#undef signal

/* Define the communication method between server and clients:
 *   You can have either or both kinds of sockets, but you can't mix
 *   sockets with sysv ipc
 */

#define INTERNET_DOMAIN_SOCKETS
#define UNIX_DOMAIN_SOCKETS

/*
 * Define additional authentication protocols to be used. These methods will
 * be tried before falling back to the default gnuserv protocol (based on
 * the GNU_SECURE environment variable). Currently, only MIT-MAGIC-COOKIE-1
 * is also supported.
 *
 * Comment out the next line(s) if you don't want to enable the
 * appropriate authentication protocol.
 */

#if defined (HAVE_XAUTH)
#define AUTH_MAGIC_COOKIE
#endif /* HAVE_XAUTH */

/*
 * stuff related to supporting MIT-MAGIC-COOKIE-1
 */

#if 0
#define MCOOKIE_SCREEN "42980"   /* screen # to use as the gnuserv cookie */ 
#endif
#define MCOOKIE_NAME   "MAGIC-1" /* authentication protocol name */
#define MCOOKIE_X_NAME "MIT-MAGIC-COOKIE-1"  /* as needed by X */


#define DEFAUTH_NAME "GNU-SECURE"  /* name of default auth protocol */
#define AUTH_TIMEOUT  15           /* # seconds to wait for auth data */
#define AUTH_NAMESZ   15           /* max allows auth protocol name size */


/*
 * Pick a default communication scheme, if none was specified.
 */

#if !defined(UNIX_DOMAIN_SOCKETS) && !defined(INTERNET_DOMAIN_SOCKETS)

/* BSD systems use Unix Domain sockets by default */

#ifdef BSD
#define UNIX_DOMAIN_SOCKETS
#endif

#endif /* No communication method pre-defined */

/*
 * If you are using SYSV_IPC, you might want to make the buffer size bigger
 * since it limits the size of requests and responses. Don't make it bigger
 * than your system's max message size though (usually a couple of k) or else
 * msgsend will start failing. For sockets, using the system BUFSIZ is usually
 * what you want. 
 */

#if defined(INTERNET_DOMAIN_SOCKETS) || defined(UNIX_DOMAIN_SOCKETS)
#include <sys/socket.h>
#endif /* INTERNET_DOMAIN_SOCKETS || UNIX_DOMAIN_SOCKETS */

#ifdef INTERNET_DOMAIN_SOCKETS
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define TABLE_SIZE 101		/* The number of entries in the hash table */
#define HASH(host) host		/* Rather simplistic hash function */
#define DEFAULT_PORT 21490	/* default port number to use is
				 * DEFAULT_PORT + uid */
#endif /* INTERNET_DOMAIN_SOCKETS */

#ifdef UNIX_DOMAIN_SOCKETS
#include <sys/un.h>
#define HIDE_UNIX_SOCKET	/* put the unix socket in a protected dir */
#endif /* UNIX_DOMAIN_SOCKETS */

#define HOSTNAMSZ 255		/* max size of a hostname */
#define REPLYSIZ 300		/* max size of reply from server to client */
#undef FALSE
#define FALSE 0
#undef TRUE
#define TRUE 1

/* The casts shut Sun's compiler up and are safe in the context these
   are actually used. */
#define max2(x,y) (((int) (x) > (int) (y)) ? (x) : (y))
#define min2(x,y) (((int) (x) < (int) (y)) ? (x) : (y))

#ifndef _NFILE            /* rough guess at maximum number of open files */
#define _NFILE 20
#endif

#define EOT_STR "\004"
#define EOT_CHR '\004'

/* connection types */
#define CONN_UNIX     0
#define CONN_INTERNET 1
#define CONN_IPC      2

/* function declarations */
int glibtop_make_connection (const char *hostarg, int portarg, int *s);

#ifdef INTERNET_DOMAIN_SOCKETS
long glibtop_internet_addr (const char *host);
#endif