/* $Id: plugin_proc_stat.c,v 1.8 2004/01/21 11:31:23 reinelt Exp $ * * plugin for /proc/stat parsing * * Copyright 2003 Michael Reinelt * Copyright 2004 The LCD4Linux Team * * 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 1.8 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 #include #include #include #include #include "debug.h" #include "plugin.h" #include "hash.h" static HASH Stat = { 0, }; static void hash_set1 (char *key1, char *val) { hash_set_filter (&Stat, key1, val); } static void hash_set2 (char *key1, char *key2, char *val) { char key[32]; snprintf (key, sizeof(key), "%s.%s", key1, key2); hash_set1 (key, val); } static void hash_set3 (char *key1, char *key2, char *key3, char *val) { char key[32]; snprintf (key, sizeof(key), "%s.%s.%s", key1, key2, key3); hash_set1 (key, val); } static int parse_proc_stat (void) { int age; FILE *stream; // reread every 10 msec only age=hash_age(&Stat, NULL, NULL); if (age>0 && age<=10) return 0; stream=fopen("/proc/stat", "r"); if (stream==NULL) { error ("fopen(/proc/stat) failed: %s", strerror(errno)); return -1; } while (!feof(stream)) { char buffer[1024]; if (fgets (buffer, sizeof(buffer), stream) ==NULL) break; if (strncmp(buffer, "cpu", 3)==0) { char *cpu; cpu=strtok(buffer, " \t\n"); hash_set2 (cpu, "user", strtok(NULL, " \t\n")); hash_set2 (cpu, "nice", strtok(NULL, " \t\n")); hash_set2 (cpu, "system", strtok(NULL, " \t\n")); hash_set2 (cpu, "idle", strtok(NULL, " \t\n")); } else if (strncmp(buffer, "page ", 5)==0) { strtok(buffer, " \t\n"); hash_set2 ("page", "in", strtok(NULL, " \t\n")); hash_set2 ("page", "out", strtok(NULL, " \t\n")); } else if (strncmp(buffer, "swap ", 5)==0) { strtok(buffer, " \t\n"); hash_set2 ("swap", "in", strtok(NULL, " \t\n")); hash_set2 ("swap", "out", strtok(NULL, " \t\n")); } else if (strncmp(buffer, "intr ", 5)==0) { int i; strtok(buffer, " \t\n"); hash_set2 ("intr", "sum", strtok(NULL, " \t\n")); for (i=0; i<16; i++) { char buffer[3]; snprintf(buffer, sizeof(buffer), "%d", i); hash_set2 ("intr", buffer, strtok(NULL, " \t\n")); } } else if (strncmp(buffer, "disk_io:", 8)==0) { char *dev=strtok(buffer+8, " \t\n:()"); while (dev!=NULL) { char *p; while ((p=strchr(dev, ','))!=NULL) *p=':'; hash_set3 ("disk_io", dev, "io", strtok(NULL, " :(,")); hash_set3 ("disk_io", dev, "rio", strtok(NULL, " ,")); hash_set3 ("disk_io", dev, "rblk", strtok(NULL, " ,")); hash_set3 ("disk_io", dev, "wio", strtok(NULL, " ,")); hash_set3 ("disk_io", dev, "wblk", strtok(NULL, " ,)")); dev=strtok(NULL, " \t\n:()"); } } else if (strncmp(buffer, "ctxt ", 5)==0) { strtok(buffer, " \t\n"); hash_set2 ("ctxt", NULL, strtok(NULL, " \t\n")); } else if (strncmp(buffer, "btime ", 6)==0) { strtok(buffer, " \t\n"); hash_set2 ("btime", NULL, strtok(NULL, " \t\n")); } else if (strncmp(buffer, "processes ", 10)==0) { strtok(buffer, " \t\n"); hash_set1 ("processes", strtok(NULL, " \t\n")); } else { error ("internal error: unhandled entry '%s' from /proc/stat", strtok(buffer, " \t\n")); } } fclose (stream); return 0; } static void my_proc_stat (RESULT *result, 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])); if (string==NULL) string=""; SetResult(&result, R_STRING, string); break; case 2: number=hash_get_filter(&Stat, R2S(argv[0]), 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_filter(&Stat, "cpu.user", delay); cpu_nice = hash_get_filter(&Stat, "cpu.nice", delay); cpu_system = hash_get_filter(&Stat, "cpu.system", delay); cpu_idle = hash_get_filter(&Stat, "cpu.idle", 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); } int plugin_init_proc_stat (void) { AddFunction ("proc_stat", -1, my_proc_stat); AddFunction ("cpu", 2, my_cpu); return 0; } ef='#n137'>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