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kmsg.c
Package: linux-2.4.20.tar.gz　[view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 1k
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Linux-Unix program

Development Platform:

Unix_Linux

kmsg.c：Code Content
  1. /*
  2.  *  linux/fs/proc/kmsg.c
  3.  *
  4.  *  Copyright (C) 1992  by Linus Torvalds
  5.  *
  6.  */
  8. #include <linux/types.h>
  9. #include <linux/errno.h>
  10. #include <linux/sched.h>
  11. #include <linux/kernel.h>
  12. #include <linux/poll.h>
  14. #include <asm/uaccess.h>
  15. #include <asm/io.h>
  17. extern wait_queue_head_t log_wait;
  19. extern int do_syslog(int type, char * bug, int count);
  21. static int kmsg_open(struct inode * inode, struct file * file)
  22. {
  23. return do_syslog(1,NULL,0);
  24. }
  26. static int kmsg_release(struct inode * inode, struct file * file)
  27. {
  28. (void) do_syslog(0,NULL,0);
  29. return 0;
  30. }
  32. static ssize_t kmsg_read(struct file * file, char * buf,
  33.  size_t count, loff_t *ppos)
  34. {
  35. return do_syslog(2,buf,count);
  36. }
  38. static unsigned int kmsg_poll(struct file *file, poll_table * wait)
  39. {
  40. poll_wait(file, &log_wait, wait);
  41. if (do_syslog(9, 0, 0))
  42. return POLLIN | POLLRDNORM;
  43. return 0;
  44. }
  47. struct file_operations proc_kmsg_operations = {
  48. read: kmsg_read,
  49. poll: kmsg_poll,
  50. open: kmsg_open,
  51. release: kmsg_release,
  52. };