1#include <linux/fs.h> 2#include <linux/init.h> 3#include <linux/proc_fs.h> 4#include <linux/seq_file.h> 5 6static 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 12static int cmdline_proc_open(struct inode *inode, struct file *file) 13{ 14 return single_open(file, cmdline_proc_show, NULL); 15} 16 17static 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 24static int __init proc_cmdline_init(void) 25{ 26 proc_create("cmdline", 0, NULL, &cmdline_proc_fops); 27 return 0; 28} 29module_init(proc_cmdline_init); 30