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https://github.com/netfun2000/lcd4linux.git
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870fec3b7b
plugin_netdev for parsing /proc/net/dev added git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@338 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/* $Id: plugin_meminfo.c,v 1.4 2004/01/25 05:30:09 reinelt Exp $
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*
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* plugin for /proc/meminfo parsing
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*
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* Copyright 2003 Michael Reinelt <reinelt@eunet.at>
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* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: plugin_meminfo.c,v $
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* Revision 1.4 2004/01/25 05:30:09 reinelt
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* plugin_netdev for parsing /proc/net/dev added
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*
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* Revision 1.3 2004/01/21 10:48:17 reinelt
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* hash_age function added
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*
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* Revision 1.2 2004/01/16 07:26:25 reinelt
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* moved various /proc parsing to own functions
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* made some progress with /proc/stat parsing
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*
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* Revision 1.1 2004/01/15 04:29:45 reinelt
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* moved lcd4linux.conf.sample to *.old
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* lcd4linux.conf.sample with new layout
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* new plugins 'loadavg' and 'meminfo'
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* text widget have pre- and postfix
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*
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*/
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/*
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* exported functions:
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*
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* int plugin_init_meminfo (void)
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* adds functions to access /proc/meminfo
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include "debug.h"
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#include "plugin.h"
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#include "hash.h"
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static HASH MemInfo = { 0, };
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static int parse_meminfo (void)
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{
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int age;
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FILE *stream;
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// reread every 10 msec only
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age=hash_age(&MemInfo, NULL, NULL);
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if (age>0 && age<=10) return 0;
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stream=fopen("/proc/meminfo", "r");
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if (stream==NULL) {
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error ("fopen(/proc/meminfo) failed: %s", strerror(errno));
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return -1;
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}
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while (!feof(stream)) {
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char buffer[256];
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char *c, *key, *val;
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fgets (buffer, sizeof(buffer), stream);
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c=strchr(buffer, ':');
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if (c==NULL) continue;
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key=buffer; val=c+1;
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// strip leading blanks from key
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while (isspace(*key)) *key++='\0';
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// strip trailing blanks from key
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do *c='\0'; while (isspace(*--c));
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// strip leading blanks from value
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while (isspace(*val)) *val++='\0';
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// strip trailing blanks from value
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for (c=val; *c!='\0';c++);
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while (isspace(*--c)) *c='\0';
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// skip lines that do not end with " kB"
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if (*c=='B' && *(c-1)=='k' && *(c-2)==' ') {
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// strip trailing " kB" from value
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*(c-2)='\0';
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// add entry to hash table
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hash_set (&MemInfo, key, val);
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}
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}
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fclose (stream);
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return 0;
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}
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static void my_meminfo (RESULT *result, RESULT *arg1)
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{
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char *key, *val;
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if (parse_meminfo()<0) {
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SetResult(&result, R_STRING, "");
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return;
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}
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key=R2S(arg1);
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val=hash_get(&MemInfo, key);
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if (val==NULL) val="";
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SetResult(&result, R_STRING, val);
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}
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int plugin_init_meminfo (void)
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{
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AddFunction ("meminfo", 1, my_meminfo);
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return 0;
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}
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