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https://gitlab.freedesktop.org/upower/upower.git
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cf5d24922e
I don't think the kernel exports any numbers with a decimal portion, but if they did, they would get the wrong values because some locales use "," as the decimal separator, and not "." as the kernel/C locale would.
151 lines
3.3 KiB
C
151 lines
3.3 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
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*
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* Copyright (C) 2008 David Zeuthen <davidz@redhat.com>
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <grp.h>
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#include <stdint.h>
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#include <linux/fs.h>
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#include <sys/ioctl.h>
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#include <glib.h>
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#include "sysfs-utils.h"
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double
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sysfs_get_double_with_error (const char *dir, const char *attribute)
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{
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double result;
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char *contents;
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char *filename;
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filename = g_build_filename (dir, attribute, NULL);
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if (g_file_get_contents (filename, &contents, NULL, NULL)) {
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result = g_ascii_strtod (contents, NULL);
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g_free (contents);
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} else {
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result = -1.0;
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}
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g_free (filename);
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return result;
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}
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double
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sysfs_get_double (const char *dir, const char *attribute)
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{
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double result;
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char *contents;
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char *filename;
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result = 0.0;
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filename = g_build_filename (dir, attribute, NULL);
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if (g_file_get_contents (filename, &contents, NULL, NULL)) {
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result = g_ascii_strtod (contents, NULL);
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g_free (contents);
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}
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g_free (filename);
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return result;
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}
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char *
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sysfs_get_string (const char *dir, const char *attribute)
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{
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char *result;
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char *filename;
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result = NULL;
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filename = g_build_filename (dir, attribute, NULL);
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if (!g_file_get_contents (filename, &result, NULL, NULL)) {
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result = g_strdup ("");
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}
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g_free (filename);
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return result;
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}
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int
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sysfs_get_int (const char *dir, const char *attribute)
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{
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int result;
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char *contents;
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char *filename;
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result = 0;
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filename = g_build_filename (dir, attribute, NULL);
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if (g_file_get_contents (filename, &contents, NULL, NULL)) {
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result = atoi (contents);
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g_free (contents);
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}
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g_free (filename);
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return result;
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}
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gboolean
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sysfs_get_bool (const char *dir, const char *attribute)
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{
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gboolean result;
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char *contents;
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char *filename;
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result = FALSE;
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filename = g_build_filename (dir, attribute, NULL);
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if (g_file_get_contents (filename, &contents, NULL, NULL)) {
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g_strdelimit (contents, "\n", '\0');
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result = (g_strcmp0 (contents, "1") == 0);
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g_free (contents);
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}
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g_free (filename);
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return result;
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}
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gboolean
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sysfs_file_exists (const char *dir, const char *attribute)
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{
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gboolean result;
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char *filename;
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result = FALSE;
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filename = g_build_filename (dir, attribute, NULL);
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if (g_file_test (filename, G_FILE_TEST_EXISTS)) {
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result = TRUE;
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}
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g_free (filename);
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return result;
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}
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