kmsg.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * linux/fs/proc/kmsg.c
- *
- * Copyright (C) 1992 by Linus Torvalds
- *
- */
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/poll.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- extern wait_queue_head_t log_wait;
- extern int do_syslog(int type, char * 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 * buf,
- size_t count, loff_t *ppos)
- {
- 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, 0, 0))
- return POLLIN | POLLRDNORM;
- return 0;
- }
- struct file_operations proc_kmsg_operations = {
- read: kmsg_read,
- poll: kmsg_poll,
- open: kmsg_open,
- release: kmsg_release,
- };