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-rw-r--r--plugin_meminfo.c119
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+/* $Id: plugin_meminfo.c,v 1.1 2004/01/15 04:29:45 reinelt Exp $
+ *
+ * plugin for /proc/meminfo 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_meminfo.c,v $
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <time.h>
+
+#include "debug.h"
+#include "plugin.h"
+#include "hash.h"
+
+
+static void my_meminfo (RESULT *result, RESULT *arg1)
+{
+ static HASH MemInfo = { 0, 0, NULL };
+
+ static time_t now=0;
+ char *key, *val;
+ int line;
+
+ // reread every second only
+ if (time(NULL)!=now) {
+ FILE *stream;
+
+ // destroy previous hash table
+ hash_destroy (&MemInfo);
+
+ stream=fopen("/proc/meminfo", "r");
+ if (stream==NULL) {
+ error ("fopen(/proc/meminfo) failed: %s", strerror(errno));
+ SetResult(&result, R_STRING, "");
+ return;
+ }
+
+ line=0;
+ while (!feof(stream)) {
+ char buffer[256];
+ char *c;
+ 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_set (&MemInfo, key, val);
+ }
+ }
+ fclose (stream);
+ time(&now);
+ }
+
+ key=R2S(arg1);
+ val=hash_get(&MemInfo, key);
+ if (val==NULL) val="";
+
+ SetResult(&result, R_STRING, val);
+}
+
+
+int plugin_init_meminfo (void)
+{
+ AddFunction ("meminfo", 1, my_meminfo);
+ return 0;
+}
+