mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
1.7 KiB
79 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
|
*/ |
|
|
|
#include <linux/ctype.h> |
|
#include <linux/init.h> |
|
#include <linux/kernel.h> |
|
#include <linux/module.h> |
|
#include <linux/proc_fs.h> |
|
#include <linux/seq_file.h> |
|
#include <linux/types.h> |
|
#include <linux/uaccess.h> |
|
|
|
/* |
|
* If read and write race, the read will still atomically read a valid |
|
* value. |
|
*/ |
|
int uml_exitcode = 0; |
|
|
|
static int exitcode_proc_show(struct seq_file *m, void *v) |
|
{ |
|
int val; |
|
|
|
/* |
|
* Save uml_exitcode in a local so that we don't need to guarantee |
|
* that sprintf accesses it atomically. |
|
*/ |
|
val = uml_exitcode; |
|
seq_printf(m, "%d\n", val); |
|
return 0; |
|
} |
|
|
|
static int exitcode_proc_open(struct inode *inode, struct file *file) |
|
{ |
|
return single_open(file, exitcode_proc_show, NULL); |
|
} |
|
|
|
static ssize_t exitcode_proc_write(struct file *file, |
|
const char __user *buffer, size_t count, loff_t *pos) |
|
{ |
|
char *end, buf[sizeof("nnnnn\0")]; |
|
size_t size; |
|
int tmp; |
|
|
|
size = min(count, sizeof(buf)); |
|
if (copy_from_user(buf, buffer, size)) |
|
return -EFAULT; |
|
|
|
tmp = simple_strtol(buf, &end, 0); |
|
if ((*end != '\0') && !isspace(*end)) |
|
return -EINVAL; |
|
|
|
uml_exitcode = tmp; |
|
return count; |
|
} |
|
|
|
static const struct proc_ops exitcode_proc_ops = { |
|
.proc_open = exitcode_proc_open, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_release = single_release, |
|
.proc_write = exitcode_proc_write, |
|
}; |
|
|
|
static int make_proc_exitcode(void) |
|
{ |
|
struct proc_dir_entry *ent; |
|
|
|
ent = proc_create("exitcode", 0600, NULL, &exitcode_proc_ops); |
|
if (ent == NULL) { |
|
printk(KERN_WARNING "make_proc_exitcode : Failed to register " |
|
"/proc/exitcode\n"); |
|
return 0; |
|
} |
|
return 0; |
|
} |
|
|
|
__initcall(make_proc_exitcode);
|
|
|