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_puts(m, saved_command_line);
  10         seq_putc(m, '\n');
  11         return 0;
  12 }
  13
  14 static int cmdline_proc_open(struct inode *inode, struct file *file)
  15 {
  16         return single_open(file, cmdline_proc_show, NULL);
  17 }
  18
  19 static const struct file_operations cmdline_proc_fops = {
  20         .open           = cmdline_proc_open,
  21         .read           = seq_read,
  22         .llseek         = seq_lseek,
  23         .release        = single_release,
  24 };
  25
  26 static int __init proc_cmdline_init(void)
  27 {
  28         proc_create("cmdline", 0, NULL, &cmdline_proc_fops);
  29         return 0;
  30 }
  31 fs_initcall(proc_cmdline_init);