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authorAlexey Dobriyan <adobriyan@gmail.com>2008-10-03 02:38:18 +0400
committerAlexey Dobriyan <adobriyan@gmail.com>2008-10-23 13:48:01 +0400
commit9617760287eec9091d26e6967bd3e4194de18f97 (patch)
tree8a13097b1c3e86f989f9c067bc76a451362a1c13 /fs/proc/uptime.c
parent5b3acc8de8b2bc459afae6e09ada45c7e5b11bbf (diff)
downloadop-kernel-dev-9617760287eec9091d26e6967bd3e4194de18f97.zip
op-kernel-dev-9617760287eec9091d26e6967bd3e4194de18f97.tar.gz
proc: switch /proc/uptime to seq_file
and move it to fs/proc/uptime.c while I'm at it. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Diffstat (limited to 'fs/proc/uptime.c')
-rw-r--r--fs/proc/uptime.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/fs/proc/uptime.c b/fs/proc/uptime.c
new file mode 100644
index 0000000..0c10a0b
--- /dev/null
+++ b/fs/proc/uptime.c
@@ -0,0 +1,43 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/time.h>
+#include <asm/cputime.h>
+
+static int uptime_proc_show(struct seq_file *m, void *v)
+{
+ struct timespec uptime;
+ struct timespec idle;
+ cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
+
+ do_posix_clock_monotonic_gettime(&uptime);
+ monotonic_to_bootbased(&uptime);
+ cputime_to_timespec(idletime, &idle);
+ seq_printf(m, "%lu.%02lu %lu.%02lu\n",
+ (unsigned long) uptime.tv_sec,
+ (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
+ (unsigned long) idle.tv_sec,
+ (idle.tv_nsec / (NSEC_PER_SEC / 100)));
+ return 0;
+}
+
+static int uptime_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, uptime_proc_show, NULL);
+}
+
+static const struct file_operations uptime_proc_fops = {
+ .open = uptime_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init proc_uptime_init(void)
+{
+ proc_create("uptime", 0, NULL, &uptime_proc_fops);
+ return 0;
+}
+module_init(proc_uptime_init);
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