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v6.2
 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#include "internal.h"
 7
 8static int cmdline_proc_show(struct seq_file *m, void *v)
 9{
10	seq_puts(m, saved_command_line);
11	seq_putc(m, '\n');
12	return 0;
13}
14
15static int __init proc_cmdline_init(void)
16{
17	struct proc_dir_entry *pde;
 
 
 
 
 
 
 
 
18
19	pde = proc_create_single("cmdline", 0, NULL, cmdline_proc_show);
20	pde->size = saved_command_line_len + 1;
 
21	return 0;
22}
23fs_initcall(proc_cmdline_init);
v4.17
 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
 7static 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
14static int cmdline_proc_open(struct inode *inode, struct file *file)
15{
16	return single_open(file, cmdline_proc_show, NULL);
17}
18
19static 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
26static int __init proc_cmdline_init(void)
27{
28	proc_create("cmdline", 0, NULL, &cmdline_proc_fops);
29	return 0;
30}
31fs_initcall(proc_cmdline_init);