#include <linux/module.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
MODULE_AUTHOR("Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>");
MODULE_LICENSE("GPL");
+static int hello_show(struct seq_file *file, void *data)
+{
+ seq_puts(file, "Hello, world!\n");
+ return 0;
+}
+
+#if 0
+static void * hello_start(struct seq_file *file, loff_t *pos)
+{
+ return NULL;
+}
+
+static void hello_stop(struct seq_file *file, void *data)
+{
+}
+
+static void * hello_next(struct seq_file *file, void *data, loff_t *pos)
+{
+ return NULL;
+}
+
+static const struct seq_operations hello_seqops =
+{
+ .start = hello_start,
+ .stop = hello_stop,
+ .next = hello_next,
+ .show = hello_show,
+};
+#endif
+
+static int hello_procfs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, hello_show, NULL);
+}
+
+static const struct file_operations hello_procfs_fops =
+{
+ .open = hello_procfs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
static int hello_procfs_init(void)
{
+ struct proc_dir_entry *entry;
+ entry = create_proc_entry("gnu", 0666, NULL);
+ entry->proc_fops = &hello_procfs_fops;
return 0;
}
static void hello_procfs_exit(void)
{
+ remove_proc_entry("gnu", NULL);
}
module_init(hello_procfs_init);