mirror of
https://github.com/netfun2000/lcd4linux.git
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6d5d1055ea
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@840 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
138 lines
2.9 KiB
C
138 lines
2.9 KiB
C
/* $Id$
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* $URL$
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*
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* plugin for /proc/meminfo parsing
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*
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* Copyright (C) 2003 Michael Reinelt <michael@reinelt.co.at>
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* Copyright (C) 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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/*
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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 "config.h"
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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;
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static FILE *stream = NULL;
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static int parse_meminfo(void)
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{
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int age;
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/* reread every 10 msec only */
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age = hash_age(&MemInfo, NULL);
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if (age > 0 && age <= 10)
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return 0;
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if (stream == NULL)
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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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rewind(stream);
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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)
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continue;
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key = buffer;
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val = c + 1;
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/* strip leading blanks from key */
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while (isspace(*key))
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*key++ = '\0';
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/* strip trailing blanks from key */
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do
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*c = '\0';
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while (isspace(*--c));
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/* strip leading blanks from value */
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while (isspace(*val))
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*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))
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*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_put(&MemInfo, key, val);
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}
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}
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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, NULL);
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if (val == NULL)
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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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hash_create(&MemInfo);
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AddFunction("meminfo", 1, my_meminfo);
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return 0;
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}
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void plugin_exit_meminfo(void)
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{
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if (stream != NULL) {
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fclose(stream);
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stream = NULL;
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}
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hash_destroy(&MemInfo);
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}
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