static ssize_t srm_env_proc_write()

in kernel/srm_env.c [89:120]

• 27 lines of code
• 6 McCabe index (conditional complexity)

static ssize_t srm_env_proc_write(struct file *file, const char __user *buffer,
				  size_t count, loff_t *pos)
{
	int res;
	unsigned long	id = (unsigned long)PDE_DATA(file_inode(file));
	char		*buf = (char *) __get_free_page(GFP_USER);
	unsigned long	ret1, ret2;

	if (!buf)
		return -ENOMEM;

	res = -EINVAL;
	if (count >= PAGE_SIZE)
		goto out;

	res = -EFAULT;
	if (copy_from_user(buf, buffer, count))
		goto out;
	buf[count] = '\0';

	ret1 = callback_setenv(id, buf, count);
	if ((ret1 >> 61) == 0) {
		do
			ret2 = callback_save_env();
		while((ret2 >> 61) == 1);
		res = (int) ret1;
	}

 out:
	free_page((unsigned long)buf);
	return res;
}