dockapps/wmmemfree/mem_linux.c

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/*
* mem_linux.c - get memory status
*
* Copyright (C) 2003 Draghicioiu Mihai <misuceldestept@go.ro>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
long long int mem_total, mem_used, mem_free, mem_shared, mem_buffers, mem_cached;
long long int swp_total, swp_used, swp_free;
void mem_getfree()
{
FILE *file;
int count;
file = fopen("/proc/meminfo", "r");
if(!file)
{
perror("/proc/meminfo");
exit(1);
}
count = fscanf(file, "MemTotal: %lld kB MemFree: %lld kB "
"MemAvailable: %*d kB Buffers: %lld kB Cached: %lld kB",
&mem_total, &mem_free, &mem_buffers, &mem_cached);
if (count != 4) {
mem_total = 1;
mem_free = 1;
mem_buffers = 0;
mem_cached = 0;
}
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for (int i = 0; i < 10; i++) {
while (fgetc(file) != '\n') {}
}
count = fscanf(file, "SwapTotal: %lld kB SwapFree: %lld kB",
&swp_total, &swp_free);
if (count != 2) {
swp_total = 1;
swp_free = 1;
}
fclose(file);
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mem_used = mem_total - mem_free;
swp_used = swp_total - swp_free;
}