?? isdn.c
字號:
/* $Id: isdn.c,v 1.10 2003/06/21 05:46:18 reinelt Exp $ * * ISDN specific functions * * Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.at) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: isdn.c,v $ * Revision 1.10 2003/06/21 05:46:18 reinelt * DVB client integrated * * Revision 1.9 2001/05/27 07:19:28 reinelt * * fixed a warning in pixmap.c * temporarily fixed a bug in isdn.c (ISDN_MAX_CHANNELS is no longer defined?) * fixed a bug in configure.in (--with-drivers=xyz did not work) * * Revision 1.8 2000/08/10 18:42:20 reinelt * * fixed some bugs with the new syslog code * * Revision 1.7 2000/08/10 09:44:09 reinelt * * new debugging scheme: error(), info(), debug() * uses syslog if in daemon mode * * Revision 1.6 2000/04/15 11:56:35 reinelt * * more debug messages * * Revision 1.5 2000/03/13 15:58:24 reinelt * * release 0.9 * moved row parsing to parser.c * all basic work finished * * Revision 1.4 2000/03/10 17:36:02 reinelt * * first unstable but running release * * Revision 1.3 2000/03/07 11:01:34 reinelt * * system.c cleanup * * Revision 1.2 2000/03/06 06:04:06 reinelt * * minor cleanups * *//* * exported functions: * * Isdn (int *rx, int *tx, int *usage) * returns 0 if ok, -1 if error * sets *usage to all channels USAGE or'ed together * sets received/transmitted bytes in *rx, *tx * */#include <stdlib.h>#include <stdio.h>#include <string.h>#include <unistd.h>#include <errno.h>#include <fcntl.h>#include <sys/ioctl.h>#include <sys/types.h>#include <linux/isdn.h>// Fixme: ISDN_MAX_CHANNELS seems undefined in recent kernels#ifndef ISDN_MAX_CHANNELS#define ISDN_MAX_CHANNELS 64#endif#include "debug.h"#include "isdn.h"#include "filter.h"typedef struct { unsigned long in; unsigned long out;} CPS;static int Usage (void){ static int fd=0; char buffer[4096], *p; int i, usage; if (fd==-1) return 0; fd=open ("/dev/isdninfo", O_RDONLY | O_NDELAY); if (fd==-1) { error ("open(/dev/isdninfo) failed: %s", strerror(errno)); return 0; } if (read (fd, buffer, sizeof(buffer))==-1) { error ("read(/dev/isdninfo) failed: %s", strerror(errno)); fd=-1; return 0; } if (close(fd)==-1) { error ("close(/dev/isdninfo) failed: %s", strerror(errno)); fd=-1; return 0; } p=strstr(buffer, "usage:"); if (p==NULL) { error ("parse(/dev/isdninfo) failed: no usage line"); fd=-1; return 0; } p+=6; usage=0; for (i=0; i<ISDN_MAX_CHANNELS; i++) { usage|=strtol(p, &p, 10); } return usage;}int Isdn (int *rx, int *tx, int *usage){ static int fd=-2; CPS cps[ISDN_MAX_CHANNELS]; double cps_i, cps_o; int i; *usage=0; *rx=0; *tx=0; if (fd==-1) return -1; if (fd==-2) { fd = open("/dev/isdninfo", O_RDONLY | O_NDELAY); if (fd==-1) { error ("open(/dev/isdninfo) failed: %s", strerror(errno)); return -1; } debug ("open (/dev/isdninfo)=%d", fd); } if (ioctl(fd, IIOCGETCPS, &cps)) { error("ioctl(IIOCGETCPS) failed: %s", strerror(errno)); fd=-1; return -1; } cps_i=0; cps_o=0; for (i=0; i<ISDN_MAX_CHANNELS; i++) { cps_i+=cps[i].in; cps_o+=cps[i].out; } *rx=(int)smooth("isdn_rx", 1000, cps_i); *tx=(int)smooth("isdn_tx", 1000, cps_o); *usage=Usage(); return 0;}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -