initial commit

1 files changed, 203 insertions, 0 deletions

diff --git a/src/sysfs-utils.c b/src/sysfs-utils.c
new file mode 100644
index 0000000..0a06c2d
--- /dev/null
+++ b/src/sysfs-utils.c
@@ -0,0 +1,203 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2008 David Zeuthen <david@fubar.dk>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <grp.h>
+#include <linux/fs.h>
+#include <sys/ioctl.h>
+
+#include "sysfs-utils.h"
+
+double
+sysfs_get_double (const char *dir, const char *attribute)
+{
+        double result;
+        char *contents;
+        char *filename;
+
+        result = 0.0;
+        filename = g_build_filename (dir, attribute, NULL);
+        if (g_file_get_contents (filename, &contents, NULL, NULL)) {
+                result = atof (contents);
+                g_free (contents);
+        }
+        g_free (filename);
+
+
+        return result;
+}
+
+gboolean
+sysfs_file_contains (const char *dir, const char *attribute, const char *string)
+{
+        gboolean result;
+        char *filename;
+        char *s;
+
+        result = FALSE;
+
+        filename = g_build_filename (dir, attribute, NULL);
+        if (g_file_get_contents (filename, &s, NULL, NULL)) {
+                result = (strstr(s, string) != NULL);
+                g_free (s);
+        }
+        g_free (filename);
+
+        return result;
+}
+
+char *
+sysfs_get_string (const char *dir, const char *attribute)
+{
+        char *result;
+        char *filename;
+
+        result = NULL;
+        filename = g_build_filename (dir, attribute, NULL);
+        if (!g_file_get_contents (filename, &result, NULL, NULL)) {
+                result = g_strdup ("");
+        }
+        g_free (filename);
+
+        return result;
+}
+
+int
+sysfs_get_int (const char *dir, const char *attribute)
+{
+        int result;
+        char *contents;
+        char *filename;
+
+        result = 0;
+        filename = g_build_filename (dir, attribute, NULL);
+        if (g_file_get_contents (filename, &contents, NULL, NULL)) {
+                result = atoi (contents);
+                g_free (contents);
+        }
+        g_free (filename);
+
+
+        return result;
+}
+
+guint64
+sysfs_get_uint64 (const char *dir, const char *attribute)
+{
+        guint64 result;
+        char *contents;
+        char *filename;
+
+        result = 0;
+        filename = g_build_filename (dir, attribute, NULL);
+        if (g_file_get_contents (filename, &contents, NULL, NULL)) {
+                result = atoll (contents);
+                g_free (contents);
+        }
+        g_free (filename);
+
+
+        return result;
+}
+
+gboolean
+sysfs_file_exists (const char *dir, const char *attribute)
+{
+        gboolean result;
+        char *filename;
+
+        result = FALSE;
+        filename = g_build_filename (dir, attribute, NULL);
+        if (g_file_test (filename, G_FILE_TEST_EXISTS)) {
+                result = TRUE;
+        }
+        g_free (filename);
+
+        return result;
+}
+
+char *
+_dupv8 (const char *s)
+{
+        const char *end_valid;
+
+        if (!g_utf8_validate (s,
+                             -1,
+                             &end_valid)) {
+                g_warning ("The string '%s' is not valid UTF-8. Invalid characters begins at '%s'", s, end_valid);
+                return g_strndup (s, end_valid - s);
+        } else {
+                return g_strdup (s);
+        }
+}
+
+char *
+sysfs_resolve_link (const char *dir, const char *attribute)
+{
+        char *full_path;
+        char link_path[PATH_MAX];
+        char resolved_path[PATH_MAX];
+        ssize_t num;
+        gboolean found_it;
+
+        found_it = FALSE;
+
+        full_path = g_build_filename (dir, attribute, NULL);
+
+        //g_warning ("attribute='%s'", attribute);
+        //g_warning ("full_path='%s'", full_path);
+        num = readlink (full_path, link_path, sizeof (link_path) - 1);
+        if (num != -1) {
+                char *absolute_path;
+
+                link_path[num] = '\0';
+
+                //g_warning ("link_path='%s'", link_path);
+                absolute_path = g_build_filename (dir, link_path, NULL);
+                //g_warning ("absolute_path='%s'", absolute_path);
+                if (realpath (absolute_path, resolved_path) != NULL) {
+                        //g_warning ("resolved_path='%s'", resolved_path);
+                        found_it = TRUE;
+                }
+                g_free (absolute_path);
+        }
+        g_free (full_path);
+
+        if (found_it)
+                return g_strdup (resolved_path);
+        else
+                return NULL;
+}