/* * linux/fs/proc/kmsg.c * * Copyright (C) 1992 by Linus Torvalds * */ #include <linux/types.h> #include <linux/errno.h> #include <linux/time.h> #include <linux/kernel.h> #include <linux/poll.h> #include <linux/fs.h> #include <asm/uaccess.h> #include <asm/io.h> extern wait_queue_head_t log_wait; extern int do_syslog(int type, char __user *bug, int count); static int kmsg_open(struct inode * inode, struct file * file) { return do_syslog(1,NULL,0); } static int kmsg_release(struct inode * inode, struct file * file) { (void) do_syslog(0,NULL,0); return 0; } static ssize_t kmsg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0)) return -EAGAIN; return do_syslog(2, buf, count); } static unsigned int kmsg_poll(struct file *file, poll_table *wait) { poll_wait(file, &log_wait, wait); if (do_syslog(9, NULL, 0)) return POLLIN | POLLRDNORM; return 0; } const struct file_operations proc_kmsg_operations = { .read = kmsg_read, .poll = kmsg_poll, .open = kmsg_open, .release = kmsg_release, };