+++ /dev/null
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * wrapper/random.c
- *
- * wrapper around bootid read. Read the boot id through the /proc filesystem.
- *
- * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <linux/errno.h>
-
-/* boot_id depends on sysctl */
-#if defined(CONFIG_SYSCTL)
-
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/sched.h>
-#include <linux/uaccess.h>
-#include <wrapper/random.h>
-
-/*
- * Returns string boot id.
- */
-int wrapper_get_bootid(char *bootid)
-{
- struct file *file;
- int ret;
- ssize_t len;
- mm_segment_t old_fs;
-
- file = filp_open("/proc/sys/kernel/random/boot_id", O_RDONLY, 0);
- if (IS_ERR(file))
- return PTR_ERR(file);
-
- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
- if (!file->f_op || !file->f_op->read) {
- ret = -EINVAL;
- goto end;
- }
-
- len = file->f_op->read(file, bootid, BOOT_ID_LEN - 1, &file->f_pos);
- if (len != BOOT_ID_LEN - 1) {
- ret = -EINVAL;
- goto end;
- }
-
- bootid[BOOT_ID_LEN - 1] = '\0';
- ret = 0;
-end:
- set_fs(old_fs);
- filp_close(file, current->files);
- return ret;
-}
-EXPORT_SYMBOL_GPL(wrapper_get_bootid);
-
-#else
-
-int wrapper_get_bootid(char *bootid)
-{
- return -ENOSYS;
-}
-EXPORT_SYMBOL_GPL(wrapper_get_bootid);
-
-#endif