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