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/*
* mem.c - memory checking
*
* Copyright (C) 2010-2011 Red Hat, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Red Hat Author(s): Ales Kozumplik <akozumpl@redhat.com>
* David Cantrell <dcantrell@redhat.com>
*/
#include <errno.h>
#include <glib.h>
#include <stdlib.h>
#include "mem.h"
#include "log.h"
/* report total system memory in kB (given to us by /proc/meminfo) */
guint64 totalMemory(void) {
int i = 0, len = 0;
guint64 total = 0;
unsigned long long int dtotal = 0;
gchar *contents = NULL;
gchar **lines = NULL, **fields = NULL;
GError *fileErr = NULL;
if (!g_file_get_contents(MEMINFO, &contents, NULL, &fileErr)) {
logMessage(ERROR, "error reading %s: %s", MEMINFO, fileErr->message);
g_error_free(fileErr);
return total;
}
lines = g_strsplit(contents, "\n", 0);
g_free(contents);
for (i = 0; i < g_strv_length(lines); i++) {
if (g_str_has_prefix(lines[i], "MemTotal:")) {
fields = g_strsplit(lines[i], " ", 0);
len = g_strv_length(fields);
if (len < 3) {
logMessage(ERROR, "unknown format for MemTotal line in %s", MEMINFO);
g_strfreev(fields);
g_strfreev(lines);
return total;
}
errno = 0;
total = g_ascii_strtoull(fields[len - 2], NULL, 10);
if ((errno == ERANGE && total == G_MAXUINT64) ||
(errno == EINVAL && total == 0)) {
logMessage(ERROR, "%s: %d: %m", __func__, __LINE__);
abort();
}
g_strfreev(fields);
break;
}
}
/* Because /proc/meminfo only gives us the MemTotal (total physical RAM
* minus the kernel binary code), we need to round this up. Assuming
* every machine has the total RAM MB number divisible by 128. */
total /= 1024;
total = (total / 128 + 1) * 128;
total *= 1024;
dtotal = total;
logMessage(INFO, "%lld kB (%lld MB) are available", dtotal, dtotal / 1024);
return total;
}
/* vim:set shiftwidth=4 softtabstop=4: */
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