fs/proc/cmdline.c

   1 #include <linux/fs.h>
   2 #include <linux/init.h>
   3 #include <linux/proc_fs.h>
   4 #include <linux/seq_file.h>
   5
   6 static int cmdline_proc_show(struct seq_file *m, void *v)
   7 {
   8         seq_printf(m, "%s\n", saved_command_line);
   9         return 0;
  10 }
  11
  12 static int cmdline_proc_open(struct inode *inode, struct file *file)
  13 {
  14         return single_open(file, cmdline_proc_show, NULL);
  15 }
  16
  17 static const struct file_operations cmdline_proc_fops = {
  18         .open           = cmdline_proc_open,
  19         .read           = seq_read,
  20         .llseek         = seq_lseek,
  21         .release        = single_release,
  22 };
  23
  24 static int __init proc_cmdline_init(void)
  25 {
  26         proc_create("cmdline", 0, NULL, &cmdline_proc_fops);
  27         return 0;
  28 }
  29 fs_initcall(proc_cmdline_init);