lcd4linux.git - lcd4linux

Age	Commit message (Expand)	Author	Files	Lines
2000-04-03	[lcd4linux @ 2000-04-03 17:31:52 by reinelt]	reinelt	1	-2/+17
2000-04-03	[lcd4linux @ 2000-04-03 06:53:09 by reinelt]	reinelt	1	-0/+24

/* $Id: plugin_meminfo.c,v 1.12 2005/05/08 04:32:44 reinelt Exp $ * * plugin for /proc/meminfo 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_meminfo.c,v $ * Revision 1.12 2005/05/08 04:32:44 reinelt * CodingStyle added and applied * * Revision 1.11 2005/01/18 06:30:23 reinelt * added (C) to all copyright statements * * Revision 1.10 2004/06/26 12:05:00 reinelt * * uh-oh... the last CVS log message messed up things a lot... * * Revision 1.9 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 1.8 2004/06/17 06:23:43 reinelt * * hash handling rewritten to solve performance issues * * Revision 1.7 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 1.6 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 1.5 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.4 2004/01/25 05:30:09 reinelt * plugin_netdev for parsing /proc/net/dev added * * Revision 1.3 2004/01/21 10:48:17 reinelt * hash_age function added * * 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 2004/01/15 04:29:45 reinelt * moved lcd4linux.conf.sample to *.old * lcd4linux.conf.sample with new layout * new plugins 'loadavg' and 'meminfo' * text widget have pre- and postfix * */ /* * exported functions: * * int plugin_init_meminfo (void) * adds functions to access /proc/meminfo * */ #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 "hash.h" static HASH MemInfo; static FILE *stream = NULL; static int parse_meminfo(void) { int age; /* reread every 10 msec only */ age = hash_age(&MemInfo, NULL); if (age > 0 && age <= 10) return 0; if (stream == NULL) stream = fopen("/proc/meminfo", "r"); if (stream == NULL) { error("fopen(/proc/meminfo) failed: %s", strerror(errno)); return -1; } rewind(stream); while (!feof(stream)) { char buffer[256]; char *c, *key, *val; fgets(buffer, sizeof(buffer), stream); c = strchr(buffer, ':'); if (c == NULL) continue; key = buffer; 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'; /* skip lines that do not end with " kB" */ if (*c == 'B' && *(c - 1) == 'k' && *(c - 2) == ' ') { /* strip trailing " kB" from value */ *(c - 2) = '\0'; /* add entry to hash table */ hash_put(&MemInfo, key, val); } } return 0; } static void my_meminfo(RESULT * result, RESULT * arg1) { char *key, *val; if (parse_meminfo() < 0) { SetResult(&result, R_STRING, ""); return; } key = R2S(arg1); val = hash_get(&MemInfo, key, NULL); if (val == NULL) val = ""; SetResult(&result, R_STRING, val); } int plugin_init_meminfo(void) { hash_create(&MemInfo); AddFunction("meminfo", 1, my_meminfo); return 0; } void plugin_exit_meminfo(void) { if (stream != NULL) { fclose(stream); stream = NULL; } hash_destroy(&MemInfo); }