Initial revision

kernel/main.c

@@ -0,0 +1,90 @@
+/*
+ * linux/table/table_impl.c
+ * Copyright (C) 1998 Martin Baulig
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/tty.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+
+#include <asm/segment.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#include <linux/table.h>
+
+#include "version.h"
+
+asmlinkage int
+sys_table (int type, union table *buf)
+{
+	union table tbl;
+	struct sysinfo i;
+	int err;
+
+	if (type == TABLE_VERSION)
+		return _TABLE_VERSION;
+
+	if (!buf)
+		return -EFAULT;
+
+	switch (type) {
+	case TABLE_CPU:
+		tbl.cpu.total = jiffies;    
+		tbl.cpu.user  = kstat.cpu_user;
+		tbl.cpu.nice  = kstat.cpu_nice;
+		tbl.cpu.sys   = kstat.cpu_system;
+		tbl.cpu.idle  = tbl.cpu.total - (tbl.cpu.user + tbl.cpu.nice + tbl.cpu.sys);
+		tbl.cpu.frequency = HZ;
+		break;
+	case TABLE_MEM:
+		si_meminfo (&i);
+		tbl.mem.total  = i.totalram;
+		tbl.mem.used   = i.totalram - i.freeram;
+		tbl.mem.free   = i.freeram;
+		tbl.mem.shared = i.sharedram;
+		tbl.mem.buffer = i.bufferram;
+		tbl.mem.cached = page_cache_size << PAGE_SHIFT;
+		break;
+	case TABLE_SWAP:
+		si_swapinfo (&i);
+		tbl.swap.total = i.totalswap;
+		tbl.swap.used  = i.totalswap - i.freeswap;
+		tbl.swap.free  = i.freeswap;
+		break;
+	case TABLE_LOADAVG:
+		tbl.loadavg.loadavg [0] = avenrun [0];
+		tbl.loadavg.loadavg [1] = avenrun [1];
+		tbl.loadavg.loadavg [2] = avenrun [2];
+		tbl.loadavg.nr_running = nr_running;
+		tbl.loadavg.nr_tasks = nr_tasks;
+		tbl.loadavg.last_pid = last_pid;
+		break;
+	case TABLE_UPTIME:
+		tbl.uptime.uptime = jiffies;
+		tbl.uptime.idle   = task[0]->utime + task[0]->stime;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	err = verify_area (VERIFY_WRITE, buf, sizeof (struct table));
+	if (err)
+		return err;
+
+	memcpy_tofs (buf, &tbl, sizeof (union table));
+	return 0;
+}