dtv-scan-tables.git - dtv-scan-tables Debian packaging

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/* $Id: plugin_proc_stat.c,v 1.11 2004/01/25 05:30:09 reinelt Exp $ * * plugin for /proc/stat parsing * * Copyright 2003 Michael Reinelt <reinelt@eunet.at> * Copyright 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 1.11 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 <stdlib.h> #include <stdio.h> #include <string.h> #include <ctype.h> #include <errno.h> #include "debug.h" #include "plugin.h" #include "hash.h" static HASH Stat = { 0, }; static void hash_set1 (char *key1, char *val) { hash_set_delta (&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 { char *key=strtok(buffer, " \t\n"); hash_set2 (key, NULL, strtok(NULL, " \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_delta(&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_delta(&Stat, "cpu.user", delay); cpu_nice = hash_get_delta(&Stat, "cpu.nice", delay); cpu_system = hash_get_delta(&Stat, "cpu.system", delay); cpu_idle = hash_get_delta(&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); } 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); snprintf (buffer, sizeof(buffer), "disk_io\\.%s\\.%s", dev, key); value = hash_get_regex(&Stat, buffer, delay); SetResult(&result, R_NUMBER, &value); } int plugin_init_proc_stat (void) { AddFunction ("proc_stat", -1, my_proc_stat); AddFunction ("cpu", 2, my_cpu); AddFunction ("disk", 3, my_disk); return 0; }


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