#include <linux/fs.h> #include <linux/init.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> static int cmdline_proc_show(struct seq_file *m, void *v) { seq_printf(m, "%s\n", saved_command_line); return 0; } static int cmdline_proc_open(struct inode *inode, struct file *file) { return single_open(file, cmdline_proc_show, NULL); } static const struct file_operations cmdline_proc_fops = { .open = cmdline_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int __init proc_cmdline_init(void) { proc_create("cmdline", 0, NULL, &cmdline_proc_fops); return 0; } fs_initcall(proc_cmdline_init);