From a94ba7634d312728e25f888ff252e7c8a731a578 Mon Sep 17 00:00:00 2001
From: reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>
Date: Thu, 15 Jan 2004 04:29:45 +0000
Subject: [lcd4linux @ 2004-01-15 04:29:45 by reinelt] moved
 lcd4linux.conf.sample to *.old lcd4linux.conf.sample with new layout new
 plugins 'loadavg' and 'meminfo' text widget have pre- and postfix

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@311 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
---
 plugin_meminfo.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 plugin_meminfo.c

(limited to 'plugin_meminfo.c')

diff --git a/plugin_meminfo.c b/plugin_meminfo.c
new file mode 100644
index 0000000..6115515
--- /dev/null
+++ b/plugin_meminfo.c
@@ -0,0 +1,119 @@
+/* $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;
+}
+
-- 
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