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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/proc/kmsg.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/proc/kmsg.c')
-rw-r--r--fs/proc/kmsg.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/fs/proc/kmsg.c b/fs/proc/kmsg.c
new file mode 100644
index 000000000000..10d37bf25206
--- /dev/null
+++ b/fs/proc/kmsg.c
@@ -0,0 +1,55 @@
+/*
+ * 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;
+}
+
+
+struct file_operations proc_kmsg_operations = {
+ .read = kmsg_read,
+ .poll = kmsg_poll,
+ .open = kmsg_open,
+ .release = kmsg_release,
+};