osdcpufreq.c

能够动态显示cpu工作频率的软件源代码

/* 
 * OSD CPU frequency monitor (osdcpufreq) - It displays an OSD-like window
 * with information about the CPU current status: frequency, CPU driver,
 * governor... It is very useful for laptops equipped with
 * mobile technology processors (like the Intel Centrino), which can change the
 * speed or the governor on the fly.
 * Copyright 2005 V韈tor Mart韓ez Romanos.
 * web site: http://osdcpufreq.sourceforge.net
 *
 * Based on the idea of osdbattery program written by Maxim Uvarov <[e-mail]>.
 * 
 * This file is part of osdcpufreq.
 * Written by V韈tor Mart韓ez Romanos <[e-mail]>
 * 
 * osdcpufreq 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 of the License, or
 * (at your option) any later version.
 *
 * osdcpufreq 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *  
 */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "osdcpufreq.h"
#include <xosd.h>

#define FILE_CONF ".osdcpufreq.conf"
#define CPUFREQD_ERROR "\nDo you have a processor that supports frequency scaling, like the Intel Centrino?\nDoes your kernel support CPU Frequency scaling? See zcat /proc/config.gz | grep CPU_FREQ output\nDoes your kernel support CPU frequency translation statistics? See zcat /proc/config.gz | grep CPU_FREQ_STAT output\nIs your CPUFreq driver loaded? If you have a centrino processor, as root try modprobe speedstep-centrino. If you have an AMD64 processor with Cool and Quiet enabled, try modprobe powernow-k8.\n\n"
#define XOSD_ERROR "Is xosd installed?\n\n"
#define CONTACT_ERROR "-->The program doesn't work properly.\n-->Please send me the error message and a short description about your computer:\n-->hardware, OS, xosd version, kernel version, etc.\n-------->to [e-mail] (English or Spanish)<--------\n" 

#define version 0.3

void get_cpu_info(cpufreq_info_struct *cpufreq_info, char cpu_num) {
	char file[54];	
	FILE *fp;

	sprintf(file, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", cpu_num);

	fp = fopen (file, "r");
	if (fp == NULL ) {
		printf("Error reading scaling_cur_freq file. ");
		printf("%s",CPUFREQD_ERROR);
		printf("%s",CONTACT_ERROR);
		exit(1);
	} else {
		fscanf (fp,"%i",&(cpufreq_info->cur_freq));
		fclose (fp);
	}

	
	sprintf(file, "/sys/devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu_num);
	
	fp = fopen (file, "r");
	if (fp == NULL ) {
		printf("Error reading cpuinfo_max_freq file. ");
		printf("%s",CPUFREQD_ERROR);
		printf("%s",CONTACT_ERROR);
		exit(1);
	} else {
		fscanf (fp,"%i",&(cpufreq_info->max_freq));
		fclose (fp);
	}
	
	
	sprintf(file, "/sys/devices/system/cpu/cpu%d/cpufreq/cpuinfo_min_freq", cpu_num);

	fp = fopen (file, "r");
	if (fp == NULL ) {
		printf("Error reading cpuinfo_min_freq file. ");
		printf("%s",CPUFREQD_ERROR);
		printf("%s",CONTACT_ERROR);
		exit(1);
	} else {
		fscanf (fp,"%i",&(cpufreq_info->min_freq));
		fclose (fp);
	}
	

	sprintf(file, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_driver", cpu_num);

	fp = fopen (file, "r");
	if (fp == NULL ) {
		printf("Error reading scaling_driver file. ");
		printf("%s",CPUFREQD_ERROR);
		printf("%s",CONTACT_ERROR);
		exit(1);
	} else {
		fscanf (fp,"%s",(char *)&(cpufreq_info->driver));
		fclose (fp);
	}


	sprintf(file, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_governor", cpu_num);

	fp = fopen (file, "r");
	if (fp == NULL ) {
		printf("Error reading scaling_driver file ");
		printf("%s",CPUFREQD_ERROR);
		printf("%s",CONTACT_ERROR);
		exit(1);
	} else {
		fscanf (fp,"%s",(char *)&(cpufreq_info->governor));
		fclose (fp);
	}


}

void configure(config_struct *config) {
	char line[256];
	char value[64];
	char *the_home;
	char config_file[48];
	int chars_number, i;
	FILE *fp;
	
	/* getting user home directory */
	the_home =getenv("HOME");
	sprintf(config_file, "%s/%s",the_home,FILE_CONF);

	/* Load default values. If user doesn't set properly one or more values, 
	 * or if no config file found, I use program default values  */
	config->cpu_num = 0;
	config->align = 2;
	config->vertical_offset = 5;
	config->horizontal_offset = 5;
	strncpy(config->font, "-misc-fixed-medium-r-semicondensed--*-*-*-*-c-*-*-*", 63);
	strncpy(config->colour, "green", 63);
	config->shadow_offset = 1;
	strncpy(config->shadow_colour, "black", 63);
	config->bar_length = 52;
	config->on_time = 3;
	config->refresh = 1;
	

	fp = fopen(config_file,"r");
	if (fp == NULL) {
		printf("WARNING: no config file found at %s, using default settings.\n\n", config_file);
	}
	else {
		while (!feof(fp)) {

			/* get a line of the config file */
			if (fgets(line, 256, fp) == NULL) {
				fclose(fp);
				break;
			}

			/* Delete ' ' chars at the start of a line */
			while (*line==' ') {
				chars_number=strlen(line);
				for (i=0;i<=chars_number;i++)
					*(line+i)=*(line+i+1);
			}

			/* set config values from the config file */	
			if (*line!='#') { //uncommented lines

				if (sscanf(line, "display cpu = %s", value) != errno) 
					config->cpu_num = atoi(value);
				
				if (sscanf(line, "align = %s", value) != errno) 
					config->align = atoi(value);

				if (sscanf(line, "vertical offset = %s", value) != errno) 
					config->vertical_offset = atoi(value);	
				
				if (sscanf(line, "horizontal offset = %s", value) != errno) 
					config->horizontal_offset = atoi(value);	

				if (sscanf(line, "font = %s", value) != errno) 
					strcpy(config->font, value);

				if (sscanf(line, "colour = %s", value) != errno)
					strcpy(config->colour, value);

				if (sscanf(line, "shadow offset = %s", value) != errno) 
					config->shadow_offset = atoi(value);

				if (sscanf(line, "shadow colour = %s", value) != errno) 
					strcpy(config->shadow_colour, value);

				if (sscanf(line, "bar length = %s", value) != errno) 
					config->bar_length = atoi(value);

				if (sscanf(line, "on time = %s", value) != errno) 
					config->on_time = atoi(value);	

				if (sscanf(line, "refresh = %s", value) != errno) 
					config->refresh = atoi(value);

		//	printf("%s",line); //Debug info: show cleared config file

			}
		}
	 }
}

void strup(char *cadena) {
	char i=0;
	do {
		if ( (*(cadena+i)>='a') && (*(cadena+i)<='z') )
        		*(cadena+i)-=32;
		i++;
        } while (*(cadena+i)!=0);
}

int main () {
	cpufreq_info_struct *cpufreq_info;
	config_struct *config;
	char freq_perc;
	/* OSD drawing vars */
	xosd *osd = NULL;
	char *string;


	/* Parse configuration (file or default values) */
	config=malloc(sizeof(config_struct));
	if (config == NULL) {
		printf("Error: malloc failed. Can't allocate dinamic memory for config.\n");
		printf ("%s", CONTACT_ERROR);
		exit(1);
	}
	configure(config);
	

	/* Allocate dinamic memory for cpufreq_info */
	cpufreq_info=malloc(sizeof(cpufreq_info_struct));
	if (cpufreq_info==NULL) {
		printf ("Error: malloc failed. Can't allocate dinamic memory for cpufreq_info.\n");
		printf ("%s", CONTACT_ERROR);
		exit(1);
	}

			
	/* create OSD object */
	osd = xosd_create(3);
	if (osd == NULL) {
		printf("Error creating xosd object.\n");
		printf ("%s", XOSD_ERROR);
		printf ("%s", CONTACT_ERROR);
		exit(1);
	}

	xosd_set_font(osd, config->font);
	xosd_set_align (osd, config->align);
	xosd_set_vertical_offset (osd, config->vertical_offset);
	xosd_set_horizontal_offset (osd, config->horizontal_offset);
	xosd_set_bar_length(osd, config->bar_length);;
	xosd_set_colour(osd, config->colour);
	xosd_set_shadow_colour(osd, config->shadow_colour);
	xosd_set_shadow_offset(osd, config->shadow_offset);

	string=(char *)malloc(64);
	do {
		/* getting cpu info */
		get_cpu_info(cpufreq_info,config->cpu_num);
		freq_perc=(((cpufreq_info->cur_freq)-(cpufreq_info->min_freq)))*100/((cpufreq_info->max_freq)-(cpufreq_info->min_freq));

		/* Display CPU Current freq */
		sprintf(string, "CPU current frequency: %dMHz", cpufreq_info->cur_freq/1000);
		xosd_display (osd, 0, XOSD_string, string);

		/* Display CPU freq percent bar */
		xosd_display (osd, 1, XOSD_percentage, freq_perc);

		/* Display CPU general info */
		strup(cpufreq_info->driver);
		strup(cpufreq_info->governor);
		sprintf(string, "driver: %s  governor: %s", cpufreq_info->driver, cpufreq_info->governor);
		xosd_display (osd, 2, XOSD_string, string);

		/* Wait */
		switch (config->on_time) {
			case 0: sleep(config->refresh); //always on top
				break;
			default: sleep(config->on_time);
				 break;
		}
		xosd_hide(osd);
	} while (config->on_time==0); /* Always on top? */
		
		
	/* Clear memory */
	free (string);
	free (config);
	free (cpufreq_info);
		
	return (0); //Bye ;-)
}