/* $Id: plugin_xmms.c,v 1.9 2004/03/03 03:47:04 reinelt Exp $ * * XMMS-Plugin for LCD4Linux * Copyright 2003 Markus Keil * * This file is part of LCD4Linux. * * LCD4Linux 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. * * LCD4Linux 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: plugin_xmms.c,v $ * Revision 1.9 2004/03/03 03:47:04 reinelt * big patch from Martin Hejl: * - use qprintf() where appropriate * - save CPU cycles on gettimeofday() * - add quit() functions to free allocated memory * - fixed lots of memory leaks * * Revision 1.8 2004/02/05 23:58:18 mkeil * Fixed/Optimized Hashage-timings * * Revision 1.7 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.6 2004/01/21 11:31:23 reinelt * two bugs with hash_age() ixed * * Revision 1.5 2004/01/21 10:48:17 reinelt * hash_age function added * * Revision 1.4 2004/01/16 11:12:26 reinelt * some bugs in plugin_xmms fixed, parsing moved to own function * plugin_proc_stat nearly finished * * Revision 1.3 2004/01/16 10:09:49 mkeil * -include caching for values * * Revision 1.2 2004/01/06 22:33:14 reinelt * Copyright statements cleaned up * * Revision 1.1 2003/12/19 06:27:33 reinelt * added XMMS plugin from Markus Keil * */ /* * exported functions: * * int plugin_init_xmms (void) * adds parser for /tmp/xmms-info * */ /* * The Argument 'arg1' must be one of these Things (without brackets): * * 'Title' - The title of the current song * 'Status' - The status of XMMS (playing, pause, ...) * 'Tunes in playlist' - How many entries are in the playlist * 'Currently playing' - which playlist-entry is playing * 'uSecPosition' - The position of the title in seconds (usefull for bargraphs ;-) ) * 'Position' - The position of the title in mm:ss * 'uSecTime' - The length of the current title in seconds * 'Time' - The length of the current title in mm:ss * 'Current bitrate' - The current bitrate in bit * 'Samping Frequency' - The current samplingfreqency in Hz * 'Channels' - The current number of audiochannels * 'File' - The full path of the current file * * These arguments are case-sensitive */ #include "config.h" #include #include #include #include "hash.h" #include "debug.h" #include "plugin.h" static HASH xmms = { 0, }; static int parse_xmms_info (void) { int age; FILE *xmms_stream; char zeile[200]; // reread every 100msec only age=hash_age(&xmms, NULL, NULL); if (age>=0 && age<=200) return 0; // Open Filestream for '/tmp/xmms-info' xmms_stream = fopen("/tmp/xmms-info","r"); // Check for File if( !xmms_stream ) { error("Error: Cannot open XMMS-Info Stream! Is XMMS started?"); return -1; } // Read Lines from the Stream while(fgets(zeile,sizeof(zeile),xmms_stream)) { char *c, *key, *val; c=strchr(zeile, ':'); if (c==NULL) continue; key=zeile; val=c+1; // strip leading blanks from key while (isspace(*key)) *key++='\0'; // strip trailing blanks from key do *c='\0'; while (isspace(*--c)); // strip leading blanks from value while (isspace(*val)) *val++='\0'; // strip trailing blanks from value for (c=val; *c!='\0';c++); while (isspace(*--c)) *c='\0'; hash_set (&xmms, key, val); } fclose(xmms_stream); return 0; } static void my_xmms (RESULT *result, RESULT *arg1) { char *key, *val; if (parse_xmms_info()<0) { SetResult(&result, R_STRING, ""); return; } key=R2S(arg1); val=hash_get(&xmms, key); if (val==NULL) val=""; SetResult(&result, R_STRING, val); } int plugin_init_xmms (void) { // register xmms info AddFunction ("xmms", 1, my_xmms); return 0; } void plugin_exit_xmms(void) { hash_destroy(&xmms); } 2 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 
/* $Id: plugin_proc_stat.c,v 1.26 2005/05/08 04:32:45 reinelt Exp $
 *
 * plugin for /proc/stat parsing
 *
 * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux 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.
 *
 * LCD4Linux 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: plugin_proc_stat.c,v $
 * Revision 1.26  2005/05/08 04:32:45  reinelt
 * CodingStyle added and applied
 *
 * Revision 1.25  2005/01/18 06:30:23  reinelt
 * added (C) to all copyright statements
 *
 * Revision 1.24  2005/01/11 10:19:33  reinelt
 * changes to lcd4linux.conf.sample
 *
 * Revision 1.23  2004/06/26 12:05:00  reinelt
 *
 * uh-oh... the last CVS log message messed up things a lot...
 *
 * Revision 1.22  2004/06/26 09:27:21  reinelt
 *
 * added '-W' to CFLAGS
 * changed all C++ comments to C ones
 * cleaned up a lot of signed/unsigned mistakes
 *
 * Revision 1.21  2004/06/20 10:09:56  reinelt
 *
 * 'const'ified the whole source
 *
 * Revision 1.20  2004/06/17 06:23:43  reinelt
 *
 * hash handling rewritten to solve performance issues
 *
 * Revision 1.19  2004/05/27 03:39:47  reinelt
 *
 * changed function naming scheme to plugin::function
 *
 * Revision 1.18  2004/03/11 06:39:59  reinelt
 * big patch from Martin:
 * - reuse filehandles
 * - memory leaks fixed
 * - earlier busy-flag checking with HD44780
 * - reuse memory for strings in RESULT and hash
 * - netdev_fast to wavid time-consuming regex
 *
 * Revision 1.17  2004/03/03 04:44:16  reinelt
 * changes (cosmetics?) to the big patch from Martin
 * hash patch un-applied
 *
 * Revision 1.16  2004/03/03 03:47:04  reinelt
 * big patch from Martin Hejl:
 * - use qprintf() where appropriate
 * - save CPU cycles on gettimeofday()
 * - add quit() functions to free allocated memory
 * - fixed lots of memory leaks
 *
 * Revision 1.15  2004/02/04 19:10:51  reinelt
 * Crystalfontz driver nearly finished
 *
 * Revision 1.14  2004/02/01 19:37:40  reinelt
 * got rid of every strtok() incarnation.
 *
 * Revision 1.13  2004/01/29 04:40:02  reinelt
 * every .c file includes "config.h" now
 *
 * Revision 1.12  2004/01/27 08:13:39  reinelt
 * ported PPP token to plugin_ppp
 *
 * Revision 1.11  2004/01/25 05:30:09  reinelt
 * plugin_netdev for parsing /proc/net/dev added
 *
 * Revision 1.10  2004/01/22 08:55:30  reinelt
 * fixed unhandled kernel-2.6 entries in /prco/stat
 *
 * Revision 1.9  2004/01/21 14:29:03  reinelt
 * new helper 'hash_get_regex' which delivers the sum over regex matched items
 * new function 'disk()' which uses this regex matching
 *
 * Revision 1.8  2004/01/21 11:31:23  reinelt
 * two bugs with hash_age() ixed
 *
 * Revision 1.7  2004/01/21 10:48:17  reinelt
 * hash_age function added
 *
 * Revision 1.6  2004/01/20 12:45:47  reinelt
 * "Default screen" working with MatrixOrbital
 *
 * Revision 1.5  2004/01/18 09:01:45  reinelt
 * /proc/stat parsing finished
 *
 * Revision 1.4  2004/01/18 06:54:08  reinelt
 * bug in expr.c fixed (thanks to Xavier)
 * some progress with /proc/stat parsing
 *
 * Revision 1.3  2004/01/16 11:12:26  reinelt
 * some bugs in plugin_xmms fixed, parsing moved to own function
 * plugin_proc_stat nearly finished
 *
 * Revision 1.2  2004/01/16 07:26:25  reinelt
 * moved various /proc parsing to own functions
 * made some progress with /proc/stat parsing
 *
 * Revision 1.1  2004/01/16 05:04:53  reinelt
 * started plugin proc_stat which should parse /proc/stat
 * which again is a paint in the a**
 * thinking over implementation methods of delta functions
 * (CPU load, ...)
 *
 */

/* 
 * exported functions:
 *
 * int plugin_init_proc_stat (void)
 *  adds functions to access /proc/stat
 *
 */


#include "config.h"

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

#include "debug.h"
#include "plugin.h"
#include "qprintf.h"
#include "hash.h"


static HASH Stat;
static FILE *stream = NULL;


static void hash_put1(const char *key1, const char *val)
{
    hash_put_delta(&Stat, key1, val);
}


static void hash_put2(const char *key1, const char *key2, const char *val)
{
    char key[32];

    qprintf(key, sizeof(key), "%s.%s", key1, key2);
    hash_put1(key, val);
}


static void hash_put3(const char *key1, const char *key2, const char *key3, const char *val)
{
    char key[32];

    qprintf(key, sizeof(key), "%s.%s.%s", key1, key2, key3);
    hash_put1(key, val);
}


static int parse_proc_stat(void)
{
    int age;

    /* reread every 10 msec only */
    age = hash_age(&Stat, NULL);
    if (age > 0 && age <= 10)
	return 0;

    if (stream == NULL)
	stream = fopen("/proc/stat", "r");
    if (stream == NULL) {
	error("fopen(/proc/stat) failed: %s", strerror(errno));
	return -1;
    }

    rewind(stream);

    while (!feof(stream)) {
	char buffer[1024];
	if (fgets(buffer, sizeof(buffer), stream) == NULL)
	    break;

	if (strncmp(buffer, "cpu", 3) == 0) {
	    char *key[] = { "user", "nice", "system", "idle" };
	    char delim[] = " \t\n";
	    char *cpu, *beg, *end;
	    int i;

	    cpu = buffer;

	    /* skip "cpu" or "cpu0" block */
	    if ((end = strpbrk(buffer, delim)) != NULL)
		*end = '\0';
	    beg = end ? end + 1 : NULL;

	    for (i = 0; i < 4 && beg != NULL; i++) {
		while (strchr(delim, *beg))
		    beg++;
		if ((end = strpbrk(beg, delim)))
		    *end = '\0';
		hash_put2(cpu, key[i], beg);
		beg = end ? end + 1 : NULL;
	    }
	}

	else if (strncmp(buffer, "page ", 5) == 0) {
	    char *key[] = { "in", "out" };
	    char delim[] = " \t\n";
	    char *beg, *end;
	    int i;

	    for (i = 0, beg = buffer + 5; i < 2 && beg != NULL; i++) {
		while (strchr(delim, *beg))
		    beg++;
		if ((end = strpbrk(beg, delim)))
		    *end = '\0';
		hash_put2("page", key[i], beg);
		beg = end ? end + 1 : NULL;
	    }
	}

	else if (strncmp(buffer, "swap ", 5) == 0) {
	    char *key[] = { "in", "out" };
	    char delim[] = " \t\n";
	    char *beg, *end;
	    int i;

	    for (i = 0, beg = buffer + 5; i < 2 && beg != NULL; i++) {
		while (strchr(delim, *beg))
		    beg++;
		if ((end = strpbrk(beg, delim)))
		    *end = '\0';
		hash_put2("swap", key[i], beg);
		beg = end ? end + 1 : NULL;
	    }
	}

	else if (strncmp(buffer, "intr ", 5) == 0) {
	    char delim[] = " \t\n";
	    char *beg, *end, num[4];
	    int i;

	    for (i = 0, beg = buffer + 5; i < 17 && beg != NULL; i++) {
		while (strchr(delim, *beg))
		    beg++;
		if ((end = strpbrk(beg, delim)))
		    *end = '\0';
		if (i == 0)
		    strcpy(num, "sum");
		else
		    qprintf(num, sizeof(num), "%d", i - 1);
		hash_put2("intr", num, beg);
		beg = end ? end + 1 : NULL;
	    }
	}

	else if (strncmp(buffer, "disk_io:", 8) == 0) {
	    char *key[] = { "io", "rio", "rblk", "wio", "wblk" };
	    char delim[] = " ():,\t\n";
	    char *dev, *beg, *end, *p;
	    int i;

	    dev = buffer + 8;
	    while (dev != NULL) {
		while (strchr(delim, *dev))
		    dev++;
		if ((end = strchr(dev, ')')))
		    *end = '\0';
		while ((p = strchr(dev, ',')) != NULL)
		    *p = ':';
		beg = end ? end + 1 : NULL;
		for (i = 0; i < 5 && beg != NULL; i++) {
		    while (strchr(delim, *beg))
			beg++;
		    if ((end = strpbrk(beg, delim)))
			*end = '\0';
		    hash_put3("disk_io", dev, key[i], beg);
		    beg = end ? end + 1 : NULL;
		}
		dev = beg;
	    }
	}

	else {
	    char delim[] = " \t\n";
	    char *beg, *end;

	    beg = buffer;
	    if ((end = strpbrk(beg, delim)))
		*end = '\0';
	    beg = end ? end + 1 : NULL;
	    if ((end = strpbrk(beg, delim)))
		*end = '\0';
	    while (strchr(delim, *beg))
		beg++;
	    hash_put1(buffer, beg);
	}
    }
    return 0;
}


static void my_proc_stat(RESULT * result, const int argc, RESULT * argv[])
{
    char *string;
    double number;

    if (parse_proc_stat() < 0) {
	SetResult(&result, R_STRING, "");
	return;
    }

    switch (argc) {
    case 1:
	string = hash_get(&Stat, R2S(argv[0]), NULL);
	if (string == NULL)
	    string = "";
	SetResult(&result, R_STRING, string);
	break;
    case 2:
	number = hash_get_delta(&Stat, R2S(argv[0]), NULL, R2N(argv[1]));
	SetResult(&result, R_NUMBER, &number);
	break;
    default:
	error("proc_stat(): wrong number of parameters");
	SetResult(&result, R_STRING, "");
    }
}


static void my_cpu(RESULT * result, RESULT * arg1, RESULT * arg2)
{
    char *key;
    int delay;
    double value;
    double cpu_user, cpu_nice, cpu_system, cpu_idle, cpu_total;

    if (parse_proc_stat() < 0) {
	SetResult(&result, R_STRING, "");
	return;
    }

    key = R2S(arg1);
    delay = R2N(arg2);

    cpu_user = hash_get_delta(&Stat, "cpu.user", NULL, delay);
    cpu_nice = hash_get_delta(&Stat, "cpu.nice", NULL, delay);
    cpu_system = hash_get_delta(&Stat, "cpu.system", NULL, delay);
    cpu_idle = hash_get_delta(&Stat, "cpu.idle", NULL, delay);

    cpu_total = cpu_user + cpu_nice + cpu_system + cpu_idle;

    if (strcasecmp(key, "user") == 0)
	value = cpu_user;
    else if (strcasecmp(key, "nice") == 0)
	value = cpu_nice;
    else if (strcasecmp(key, "system") == 0)
	value = cpu_system;
    else if (strcasecmp(key, "idle") == 0)
	value = cpu_idle;
    else if (strcasecmp(key, "busy") == 0)
	value = cpu_total - cpu_idle;

    if (cpu_total > 0.0)
	value = 100 * value / cpu_total;
    else
	value = 0.0;

    SetResult(&result, R_NUMBER, &value);
}


static void my_disk(RESULT * result, RESULT * arg1, RESULT * arg2, RESULT * arg3)
{
    char *dev, *key, buffer[32];
    int delay;
    double value;

    if (parse_proc_stat() < 0) {
	SetResult(&result, R_STRING, "");
	return;
    }

    dev = R2S(arg1);
    key = R2S(arg2);
    delay = R2N(arg3);

    qprintf(buffer, sizeof(buffer), "disk_io\\.%s\\.%s", dev, key);
    value = hash_get_regex(&Stat, buffer, NULL, delay);

    SetResult(&result, R_NUMBER, &value);
}


int plugin_init_proc_stat(void)
{
    hash_create(&Stat);
    AddFunction("proc_stat", -1, my_proc_stat);
    AddFunction("proc_stat::cpu", 2, my_cpu);
    AddFunction("proc_stat::disk", 3, my_disk);
    return 0;
}

void plugin_exit_proc_stat(void)
{
    if (stream != NULL) {
	fclose(stream);
	stream = NULL;
    }
    hash_destroy(&Stat);
}
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