fs/proc/cmdline.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/fs.h>
   3 #include <linux/init.h>
   4 #include <linux/proc_fs.h>
   5 #include <linux/seq_file.h>
   6
   7 static int cmdline_proc_show(struct seq_file *m, void *v)
   8 {
   9         seq_printf(m, "%s\n", saved_command_line);
  10         return 0;
  11 }
  12
  13 static int cmdline_proc_open(struct inode *inode, struct file *file)
  14 {
  15         return single_open(file, cmdline_proc_show, NULL);
  16 }
  17
  18 static const struct file_operations cmdline_proc_fops = {
  19         .open           = cmdline_proc_open,
  20         .read           = seq_read,
  21         .llseek         = seq_lseek,
  22         .release        = single_release,
  23 };
  24
  25 static int __init proc_cmdline_init(void)
  26 {
  27         proc_create("cmdline", 0, NULL, &cmdline_proc_fops);
  28         return 0;
  29 }
  30 fs_initcall(proc_cmdline_init);