First edition of my Busybox kernel patch. implements devps, devmtab, and
devmodules. With this patch, you can enable BB_FEATURE_USE_DEVPS_N_DEVMTAB and
have a completely full featured busybox without having to even compile /proc
into the kernel. I'm pretty proud of this patch. It has a few loose ends that
should be filled in sometime, but arn't used by busybox (so they arn't very
important).
-Erik
diff --git a/examples/kernel-patches/devps.patch.3_7 b/examples/kernel-patches/devps.patch.3_7
new file mode 100644
index 0000000..0f354a0
--- /dev/null
+++ b/examples/kernel-patches/devps.patch.3_7
@@ -0,0 +1,2316 @@
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/alpha/defconfig linux/arch/alpha/defconfig
+--- linux-2.2.15-pre13.virgin/arch/alpha/defconfig Tue Jan 4 11:12:10 2000
++++ linux/arch/alpha/defconfig Tue Mar 7 19:57:29 2000
+@@ -239,6 +239,9 @@
+ # CONFIG_SERIAL_CONSOLE is not set
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ CONFIG_MOUSE=y
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/arm/defconfig linux/arch/arm/defconfig
+--- linux-2.2.15-pre13.virgin/arch/arm/defconfig Thu Feb 25 11:46:46 1999
++++ linux/arch/arm/defconfig Tue Mar 7 20:01:46 2000
+@@ -156,6 +156,10 @@
+ CONFIG_SCSI_PPA=m
+ CONFIG_SCSI_PPA_HAVE_PEDANTIC=2
+
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
++
+ #
+ # Network device support
+ #
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/i386/defconfig linux/arch/i386/defconfig
+--- linux-2.2.15-pre13.virgin/arch/i386/defconfig Tue Mar 7 19:46:57 2000
++++ linux/arch/i386/defconfig Tue Mar 7 19:57:40 2000
+@@ -300,6 +300,9 @@
+ # CONFIG_SERIAL_CONSOLE is not set
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ CONFIG_MOUSE=y
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/i386/kernel/Makefile linux/arch/i386/kernel/Makefile
+--- linux-2.2.15-pre13.virgin/arch/i386/kernel/Makefile Wed Jan 20 11:18:53 1999
++++ linux/arch/i386/kernel/Makefile Tue Mar 7 19:52:45 2000
+@@ -14,8 +14,8 @@
+
+ O_TARGET := kernel.o
+ O_OBJS := process.o signal.o entry.o traps.o irq.o vm86.o \
+- ptrace.o ioport.o ldt.o setup.o time.o sys_i386.o
+-OX_OBJS := i386_ksyms.o
++ ptrace.o ioport.o ldt.o time.o sys_i386.o
++OX_OBJS := i386_ksyms.o setup.o
+ MX_OBJS :=
+
+ ifdef CONFIG_PCI
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/m68k/defconfig linux/arch/m68k/defconfig
+--- linux-2.2.15-pre13.virgin/arch/m68k/defconfig Thu Feb 25 11:46:46 1999
++++ linux/arch/m68k/defconfig Tue Mar 7 19:58:10 2000
+@@ -223,6 +223,9 @@
+ CONFIG_AMIGAMOUSE=y
+ CONFIG_ATARIMOUSE=y
+ CONFIG_AMIGA_BUILTIN_SERIAL=y
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ # CONFIG_GVPIOEXT is not set
+ # CONFIG_GVPIOEXT_LP is not set
+ # CONFIG_GVPIOEXT_PLIP is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/mips/defconfig linux/arch/mips/defconfig
+--- linux-2.2.15-pre13.virgin/arch/mips/defconfig Mon Aug 9 13:04:38 1999
++++ linux/arch/mips/defconfig Tue Mar 7 19:58:30 2000
+@@ -252,6 +252,9 @@
+ CONFIG_SERIAL=m
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ # CONFIG_UNIX98_PTYS is not set
+ # CONFIG_MOUSE is not set
+ # CONFIG_QIC02_TAPE is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/apus_defconfig linux/arch/ppc/apus_defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/apus_defconfig Thu Feb 25 11:46:47 1999
++++ linux/arch/ppc/apus_defconfig Tue Mar 7 19:59:14 2000
+@@ -303,6 +303,9 @@
+ CONFIG_SERIAL=m
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ # CONFIG_MOUSE is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/chrp_defconfig linux/arch/ppc/chrp_defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/chrp_defconfig Thu Feb 25 11:46:47 1999
++++ linux/arch/ppc/chrp_defconfig Tue Mar 7 19:58:57 2000
+@@ -261,6 +261,9 @@
+ # CONFIG_SERIAL_CONSOLE is not set
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ # CONFIG_UNIX98_PTYS is not set
+ # CONFIG_MOUSE is not set
+ # CONFIG_UMISC is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/common_defconfig linux/arch/ppc/common_defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/common_defconfig Tue Jan 4 11:12:12 2000
++++ linux/arch/ppc/common_defconfig Tue Mar 7 19:59:35 2000
+@@ -337,6 +337,9 @@
+ CONFIG_SERIAL=m
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ CONFIG_MOUSE=y
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/defconfig linux/arch/ppc/defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/defconfig Tue Jan 4 11:12:12 2000
++++ linux/arch/ppc/defconfig Tue Mar 7 19:58:43 2000
+@@ -337,6 +337,9 @@
+ CONFIG_SERIAL=m
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ CONFIG_MOUSE=y
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/gemini_defconfig linux/arch/ppc/gemini_defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/gemini_defconfig Tue Jan 4 11:12:12 2000
++++ linux/arch/ppc/gemini_defconfig Tue Mar 7 19:59:23 2000
+@@ -285,6 +285,9 @@
+ CONFIG_SERIAL_CONSOLE=y
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ # CONFIG_MOUSE is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/mbx_defconfig linux/arch/ppc/mbx_defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/mbx_defconfig Wed Mar 10 22:30:32 1999
++++ linux/arch/ppc/mbx_defconfig Tue Mar 7 19:59:49 2000
+@@ -192,6 +192,9 @@
+ CONFIG_SERIAL_CONSOLE=y
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ # CONFIG_UNIX98_PTYS is not set
+ # CONFIG_MOUSE is not set
+ # CONFIG_QIC02_TAPE is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/ppc/pmac_defconfig linux/arch/ppc/pmac_defconfig
+--- linux-2.2.15-pre13.virgin/arch/ppc/pmac_defconfig Tue Oct 26 18:53:39 1999
++++ linux/arch/ppc/pmac_defconfig Tue Mar 7 19:59:59 2000
+@@ -368,6 +368,9 @@
+ # CONFIG_SERIAL is not set
+ # CONFIG_SERIAL_EXTENDED is not set
+ # CONFIG_SERIAL_NONSTANDARD is not set
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+ CONFIG_UNIX98_PTYS=y
+ CONFIG_UNIX98_PTY_COUNT=256
+ # CONFIG_PRINTER is not set
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/s390/defconfig linux/arch/s390/defconfig
+--- linux-2.2.15-pre13.virgin/arch/s390/defconfig Tue Mar 7 19:46:57 2000
++++ linux/arch/s390/defconfig Tue Mar 7 20:02:36 2000
+@@ -64,6 +64,9 @@
+ CONFIG_3215_CONSOLE=y
+ CONFIG_HWC=y
+ CONFIG_HWC_CONSOLE=y
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
+
+ #
+ # Networking options
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/sparc/defconfig linux/arch/sparc/defconfig
+--- linux-2.2.15-pre13.virgin/arch/sparc/defconfig Tue Mar 7 19:46:57 2000
++++ linux/arch/sparc/defconfig Tue Mar 7 20:01:00 2000
+@@ -219,6 +219,10 @@
+ CONFIG_SUNQE=m
+ CONFIG_MYRI_SBUS=m
+
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
++
+ #
+ # Unix98 PTY support
+ #
+diff -ur --new-file linux-2.2.15-pre13.virgin/arch/sparc64/defconfig linux/arch/sparc64/defconfig
+--- linux-2.2.15-pre13.virgin/arch/sparc64/defconfig Tue Mar 7 19:46:57 2000
++++ linux/arch/sparc64/defconfig Tue Mar 7 20:01:16 2000
+@@ -262,6 +262,10 @@
+ CONFIG_EEXPRESS_PRO100=m
+ CONFIG_SK98LIN=m
+
++# CONFIG_DEVPS is not set
++# CONFIG_DEVMTAB is not set
++# CONFIG_DEVMODULES is not set
++
+ #
+ # Unix 98 PTY support
+ #
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/Config.in linux/drivers/char/Config.in
+--- linux-2.2.15-pre13.virgin/drivers/char/Config.in Tue Mar 7 19:46:58 2000
++++ linux/drivers/char/Config.in Tue Mar 7 19:52:45 2000
+@@ -56,6 +56,9 @@
+ dep_tristate 'Microgate SyncLink card support' CONFIG_SYNCLINK m
+ dep_tristate 'HDLC line discipline support' CONFIG_N_HDLC m
+ fi
++tristate 'Devps support' CONFIG_DEVPS
++tristate 'Devmounts support' CONFIG_DEVMTAB
++tristate 'Devmodules support' CONFIG_DEVMODULES
+ bool 'Unix98 PTY support' CONFIG_UNIX98_PTYS
+ if [ "$CONFIG_UNIX98_PTYS" = "y" ]; then
+ int 'Maximum number of Unix98 PTYs in use (0-2048)' CONFIG_UNIX98_PTY_COUNT 256
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/Makefile linux/drivers/char/Makefile
+--- linux-2.2.15-pre13.virgin/drivers/char/Makefile Tue Mar 7 19:46:58 2000
++++ linux/drivers/char/Makefile Tue Mar 7 19:52:45 2000
+@@ -620,6 +620,30 @@
+ L_OBJS += dz.o
+ endif
+
++ifeq ($(CONFIG_DEVPS),y)
++L_OBJS += devps.o
++else
++ ifeq ($(CONFIG_DEVPS),m)
++ M_OBJS += devps.o
++ endif
++endif
++
++ifeq ($(CONFIG_DEVMTAB),y)
++L_OBJS += devmtab.o
++else
++ ifeq ($(CONFIG_DEVMTAB),m)
++ M_OBJS += devmtab.o
++ endif
++endif
++
++ifeq ($(CONFIG_DEVMODULES),y)
++L_OBJS += devmodules.o
++else
++ ifeq ($(CONFIG_DEVMODULES),m)
++ M_OBJS += devmodules.o
++ endif
++endif
++
+ include $(TOPDIR)/Rules.make
+
+ fastdep:
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/devmodules.c linux/drivers/char/devmodules.c
+--- linux-2.2.15-pre13.virgin/drivers/char/devmodules.c Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/devmodules.c Tue Mar 7 22:37:42 2000
+@@ -0,0 +1,270 @@
++/* vi: set sw=8 ts=8: */
++/*
++ * linux/drivers/char/devmodules.c
++ *
++ * Copyright (C) 2000 Erik Andersen <andersee@debian.org>
++ *
++ * May be copied or modified under the terms of the GNU General Public License.
++ * See linux/COPYING for more information.
++ *
++ * This driver implements an interface whereby programs such as lsmod(8) may
++ * obtain all the information they need to do their jobs. Now you may ask,
++ * "Why not use /proc/modules?". Thanks for asking. Because /proc is big and
++ * bloated, and because using this driver we can avoid all that bloat and avoid
++ * having the kernel need to pretty print stuff and avoid having user-space
++ * then have to parse the stuff the kernel wasted its time formatting.
++ *
++ *
++ * Suggestions are welcome. Patches that work are more welcome though. ;-)
++ *
++ * When using this driver, running:
++ * mknod /dev/modules c 10 23
++ * could be considered helpful.
++ *
++ * ----------------------------------
++ * 1.00 Mar 07, 2000 -- Initial version.
++ *
++ *
++ *************************************************************************/
++
++#define DEVMODULES_VERSION "1.00"
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/sched.h>
++#include <linux/fs.h>
++#include <linux/mm.h>
++#include <linux/pagemap.h>
++#include <linux/malloc.h>
++#include <linux/miscdevice.h>
++#include <linux/devmodules.h>
++#include <linux/wrapper.h>
++#include <asm/pgtable.h>
++#include <asm/uaccess.h>
++
++
++/* Some variables used by this device */
++static struct wait_queue *devmodules_waitq = NULL;
++static int devmodules_already_opened = 0;
++static char *devmodulesfile = NULL;
++static int devmodules_ptr;
++static int devmodules_size;
++
++
++
++/****************************************************************************
++ * Handle opening and closing of the device
++ */
++
++static long long
++devmodules_lseek (struct file *file, long long offset, int orig)
++{
++ return -ESPIPE;
++}
++
++static ssize_t
++devmodules_read (struct file *file, char *buf, size_t count, loff_t * ppos)
++{
++ int n = devmodules_size - devmodules_ptr;
++
++ if (devmodules_size == 0) {
++ /* Make some space */
++ if (!(devmodulesfile = (char *) get_free_page (GFP_KERNEL)))
++ return -ENOMEM;
++ /* Grab the module list */
++ get_module_list (devmodulesfile);
++ devmodules_ptr = 0;
++ devmodules_size = strlen (devmodulesfile);
++ n = devmodules_size - devmodules_ptr;
++ }
++
++ if (n > count)
++ n = count;
++ if (n <= 0)
++ return 0;
++
++ if (copy_to_user (buf, devmodulesfile, n))
++ return -EFAULT;
++ devmodules_ptr += n;
++ return n;
++}
++
++static int devmodules_open (struct inode *ip, struct file *fp)
++{
++ /* Only let one process use us at any time -- putting other
++ * processes to sleep. Those opening us O_NONBLOCK will
++ * get an EAGAIN error */
++ if ((fp->f_flags & O_NONBLOCK) && devmodules_already_opened)
++ return -EAGAIN;
++
++ MOD_INC_USE_COUNT;
++
++ while (devmodules_already_opened) {
++ int i, got_signal=0;
++
++ /* Go to sleep until we get woken up
++ * by devmodules_close or we receive a signal */
++ module_interruptible_sleep_on(&devmodules_waitq);
++
++ for(i=0; i<_NSIG_WORDS && !got_signal; i++)
++ got_signal = current->signal.sig[i] & ~current->blocked.sig[i];
++
++ /* If we got a signal, decrement the use count
++ * and return to user space */
++ if (got_signal) {
++ MOD_DEC_USE_COUNT;
++ return -EINTR;
++ }
++ }
++
++ /* Since we got here, then devmodules_already_opened must equal 0 */
++ devmodules_already_opened=1;
++ devmodules_ptr = 0;
++ devmodules_size = 0;
++
++ return 0;
++}
++
++static int devmodules_release (struct inode *ip, struct file *fp)
++{
++ /* Clean up */
++ if (devmodulesfile != NULL) {
++ free_page ((unsigned long) devmodulesfile);
++ devmodulesfile = NULL;
++ }
++
++ /* Zero out the reference counter */
++ devmodules_already_opened=0;
++
++ /* Wake up anybody that is waiting to access this device */
++ module_wake_up(&devmodules_waitq);
++
++ MOD_DEC_USE_COUNT;
++
++ return 0;
++}
++
++static int
++devmodules_ioctl (struct inode *ip, struct file *fp,
++ unsigned int cmd, unsigned long arg)
++{
++ switch (cmd) {
++
++ case DEVMODULES_COUNT_MODULES:{
++#ifdef CONFIG_MODULES
++ return(count_kmodules());
++#else
++ return -ENOSYS;
++#endif
++ }
++
++ case DEVMODULES_GET_MODULES_LIST:{
++#if !defined CONFIG_MODULES
++ return -ENOSYS;
++#else
++
++ int stat, count;
++ struct k_module_item* module_list;
++
++
++ /* How many are there? */
++ count = count_kmodules();
++
++ /* Make some space */
++ module_list = (struct k_module_item *)kmalloc(sizeof(struct k_module_item) * count, GFP_KERNEL);
++ if (!module_list)
++ return -ENOMEM;
++ memset(module_list, 0, sizeof(struct k_module_item) * count);
++
++ /* Grab the list of modules */
++ get_kmodule_list(count, module_list);
++
++ /* Make sure there is enough room */
++ stat = verify_area (VERIFY_WRITE, (struct k_module_item *) arg,
++ sizeof(struct k_module_item) * count);
++ if (stat) {
++ printk (KERN_INFO
++ "devmodules: Insufficient space was provided.\n");
++ return stat;
++ }
++
++ /* Send it to user space */
++ copy_to_user_ret ((struct k_module_item *) arg, module_list,
++ sizeof(struct k_module_item) * count,
++ -EFAULT);
++
++ /* Clean up */
++ kfree( module_list);
++ return 0;
++#endif
++ }
++
++ default:
++ return -EINVAL;
++
++ }
++ return 0;
++}
++
++
++
++/****************************************************************************
++ * Set up the file operations devmodules will support
++ */
++static struct file_operations devmodules_fops = {
++ devmodules_lseek,
++ devmodules_read,
++ NULL, /* No write */
++ NULL, /* No readdir */
++ NULL, /* No poll */
++ devmodules_ioctl,
++ NULL, /* No mmap */
++ devmodules_open,
++ NULL, /* flush */
++ devmodules_release,
++ NULL, /* fsync */
++ NULL, /* fasync */
++ NULL, /* check_media_change */
++ NULL /* revalidate */
++};
++
++static struct miscdevice devmodules_misc_dev = {
++ DEVMODULES_MINOR,
++ "devmodules",
++ &devmodules_fops
++};
++
++/* The real driver initialization function */
++extern int devmodules_init (void)
++{
++ printk (KERN_INFO "devmodules: driver %s loaded\n", DEVMODULES_VERSION);
++
++ if (misc_register (&devmodules_misc_dev)) {
++ printk ("devmodules: can't register misc device %d\n",
++ DEVMODULES_MINOR);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++#ifdef MODULE
++
++MODULE_AUTHOR ("Erik Andersen <andersee@debian.org>");
++MODULE_DESCRIPTION
++ ("devmodules driver -- exports filesystem and mount information to user space");
++
++/* Stub driver initialization function */
++int init_module (void)
++{
++ return (devmodules_init ());
++}
++
++void cleanup_module (void)
++{
++ printk (KERN_INFO "devmodules: driver unloaded\n");
++ misc_deregister (&devmodules_misc_dev);
++}
++
++#endif /* MODULE */
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/devmtab.c linux/drivers/char/devmtab.c
+--- linux-2.2.15-pre13.virgin/drivers/char/devmtab.c Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/devmtab.c Tue Mar 7 19:52:45 2000
+@@ -0,0 +1,304 @@
++/* vi: set sw=8 ts=8: */
++/*
++ * linux/drivers/char/devmtab.c
++ *
++ * Copyright (C) 2000 Erik Andersen <andersee@debian.org>
++ *
++ * May be copied or modified under the terms of the GNU General Public License.
++ * See linux/COPYING for more information.
++ *
++ * This driver implements an interface whereby programs such as mount(8),
++ * umount(8), and df(1) may obtain all the process information they need to do
++ * their jobs without needing to use /proc. This driver another step in my
++ * evil plan to completely dismantle /proc. Muhahahaha!
++ *
++ * Suggestions are welcome. Patches that work are more welcome though. ;-)
++ *
++ *
++ * When using this driver, running:
++ * mknod /dev/mtab c 10 22
++ * could be considered helpful.
++ *
++ * ----------------------------------
++ * 1.00 Mar 07, 2000 -- Initial version.
++ *
++ *************************************************************************/
++
++#define DEVMTAB_VERSION "1.00"
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/sched.h>
++#include <linux/fs.h>
++#include <linux/mm.h>
++#include <linux/pagemap.h>
++#include <linux/malloc.h>
++#include <linux/miscdevice.h>
++#include <linux/devmtab.h>
++#include <linux/wrapper.h>
++#include <asm/pgtable.h>
++#include <asm/uaccess.h>
++
++
++/* Some variables used by this device */
++static struct wait_queue *devmtab_waitq = NULL;
++static int devmtab_already_opened = 0;
++static char *mtabfile = NULL;
++static int mtab_ptr;
++static int mtab_size;
++
++
++
++/****************************************************************************
++ * Handle opening and closing of the device
++ */
++
++static long long
++devmtab_lseek (struct file *file, long long offset, int orig)
++{
++ return -ESPIPE;
++}
++
++static ssize_t
++devmtab_read (struct file *file, char *buf, size_t count, loff_t * ppos)
++{
++ int n = mtab_size - mtab_ptr;
++
++ if (mtab_size == 0) {
++ /* Make some space */
++ if (!(mtabfile = (char *) get_free_page (GFP_KERNEL)))
++ return -ENOMEM;
++ /* Grab the mtab */
++ get_filesystem_info (mtabfile);
++ mtab_ptr = 0;
++ mtab_size = strlen (mtabfile);
++ n = mtab_size - mtab_ptr;
++ }
++
++ if (n > count)
++ n = count;
++ if (n <= 0)
++ return 0;
++
++ if (copy_to_user (buf, mtabfile, n))
++ return -EFAULT;
++ mtab_ptr += n;
++ return n;
++}
++
++static int devmtab_open (struct inode *ip, struct file *fp)
++{
++ /* Only let one process use us at any time -- putting other
++ * processes to sleep. Those opening us O_NONBLOCK will
++ * get an EAGAIN error */
++ if ((fp->f_flags & O_NONBLOCK) && devmtab_already_opened)
++ return -EAGAIN;
++
++ MOD_INC_USE_COUNT;
++
++ while (devmtab_already_opened) {
++ int i, got_signal=0;
++
++ /* Go to sleep until we get woken up
++ * by devmtab_close or we receive a signal */
++ module_interruptible_sleep_on(&devmtab_waitq);
++
++ for(i=0; i<_NSIG_WORDS && !got_signal; i++)
++ got_signal = current->signal.sig[i] & ~current->blocked.sig[i];
++
++ /* If we got a signal, decrement the use count
++ * and return to user space */
++ if (got_signal) {
++ MOD_DEC_USE_COUNT;
++ return -EINTR;
++ }
++ }
++
++ /* Since we got here, then devmtab_already_opened must equal 0 */
++ devmtab_already_opened=1;
++ mtab_ptr = 0;
++ mtab_size = 0;
++
++ return 0;
++}
++
++static int devmtab_release (struct inode *ip, struct file *fp)
++{
++ /* Clean up */
++ if (mtabfile != NULL) {
++ free_page ((unsigned long) mtabfile);
++ mtabfile = NULL;
++ }
++
++ /* Zero out the reference counter */
++ devmtab_already_opened=0;
++
++ /* Wake up anybody that is waiting to access this device */
++ module_wake_up(&devmtab_waitq);
++
++ MOD_DEC_USE_COUNT;
++
++ return 0;
++}
++
++static int
++devmtab_ioctl (struct inode *ip, struct file *fp,
++ unsigned int cmd, unsigned long arg)
++{
++ switch (cmd) {
++ case DEVMTAB_COUNT_FILESYSTEMS:{
++ return(count_kfstypes());
++ }
++
++ case DEVMTAB_GET_FILESYSTEMS:{
++ int stat, count;
++ struct k_fstype* fstypelist;
++
++ /* How many are there? */
++ count = count_kfstypes();
++
++ /* Make some space */
++ fstypelist = (struct k_fstype *)kmalloc(sizeof(struct k_fstype) * count, GFP_KERNEL);
++ if (!fstypelist)
++ return -ENOMEM;
++ memset(fstypelist, 0, sizeof(struct k_fstype) * count);
++
++ /* Grab the mtab entries */
++ get_kfstype_list(count, fstypelist);
++
++ /* Make sure there is enough room */
++ stat = verify_area (VERIFY_WRITE, (struct k_fstype *) arg,
++ sizeof(struct k_fstype) * count);
++ if (stat) {
++ printk (KERN_INFO
++ "devmtab: Insufficient space was provided.\n");
++ return stat;
++ }
++
++ /* Send it to user space */
++ copy_to_user_ret ((struct k_fstype *) arg, fstypelist,
++ sizeof(struct k_fstype) * count,
++ -EFAULT);
++
++ /* Clean up */
++ kfree( fstypelist);
++ return 0;
++ }
++
++ case DEVMTAB_COUNT_MOUNTS:{
++ return(count_mounted_filesystems());
++ }
++
++ case DEVMTAB_GET_MOUNTS:{
++ int stat, count;
++ struct k_mntent* mntentlist;
++
++ /* How many are there? */
++ count = count_mounted_filesystems();
++
++ /* Make some space */
++ mntentlist = (struct k_mntent *)kmalloc(sizeof(struct k_mntent) * count, GFP_KERNEL);
++ if (!mntentlist)
++ return -ENOMEM;
++ memset(mntentlist, 0, sizeof(struct k_mntent) * count);
++
++ /* Grab the mtab entries */
++ get_mtab_entries (count, mntentlist);
++
++ /* Make sure there is enough room */
++ stat = verify_area (VERIFY_WRITE, (void*) arg,
++ sizeof(struct k_mntent) * count);
++ if (stat) {
++ printk (KERN_INFO
++ "devmtab: Insufficient space was provided.\n");
++ return stat;
++ }
++
++ /* Send it to user space */
++ copy_to_user_ret ((struct k_mntent *) arg, mntentlist,
++ sizeof(struct k_mntent) * count,
++ -EFAULT);
++
++ /* Clean up */
++ kfree( mntentlist);
++ return 0;
++ }
++
++ case DEVMTAB_SET_ROOTFS_DEVNAME:{
++ char rootdevname[256];
++
++ copy_from_user_ret (rootdevname, (char*) arg,
++ sizeof(rootdevname), -EFAULT);
++ return( set_root_filesystem_name( rootdevname));
++ }
++
++
++ default:
++ return -EINVAL;
++
++ }
++ return 0;
++}
++
++
++
++/****************************************************************************
++ * Set up the file operations devmtab will support
++ */
++static struct file_operations devmtab_fops = {
++ devmtab_lseek,
++ devmtab_read,
++ NULL, /* No write */
++ NULL, /* No readdir */
++ NULL, /* No poll */
++ devmtab_ioctl,
++ NULL, /* No mmap */
++ devmtab_open,
++ NULL, /* flush */
++ devmtab_release,
++ NULL, /* fsync */
++ NULL, /* fasync */
++ NULL, /* check_media_change */
++ NULL /* revalidate */
++};
++
++static struct miscdevice devmtab_misc_dev = {
++ DEVMTAB_MINOR,
++ "devmtab",
++ &devmtab_fops
++};
++
++/* The real driver initialization function */
++extern int devmtab_init (void)
++{
++ printk (KERN_INFO "devmtab: driver %s loaded\n", DEVMTAB_VERSION);
++
++ if (misc_register (&devmtab_misc_dev)) {
++ printk ("devmtab: can't register misc device %d\n",
++ DEVMTAB_MINOR);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++#ifdef MODULE
++
++MODULE_AUTHOR ("Erik Andersen <andersee@debian.org>");
++MODULE_DESCRIPTION
++ ("devmtab driver -- exports filesystem and mount information to user space");
++
++/* Stub driver initialization function */
++int init_module (void)
++{
++ return (devmtab_init ());
++}
++
++void cleanup_module (void)
++{
++ printk (KERN_INFO "devmtab: driver unloaded\n");
++ misc_deregister (&devmtab_misc_dev);
++}
++
++#endif /* MODULE */
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/devps.c linux/drivers/char/devps.c
+--- linux-2.2.15-pre13.virgin/drivers/char/devps.c Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/devps.c Tue Mar 7 19:52:45 2000
+@@ -0,0 +1,518 @@
++/* vi: set sw=8 ts=8: */
++/*
++ * linux/drivers/char/devps.c
++ *
++ * Copyright (C) 2000 Erik Andersen <andersee@debian.org>
++ *
++ * May be copied or modified under the terms of the GNU General Public License.
++ * See linux/COPYING for more information.
++ *
++ * This driver implements an interface whereby programs such as ps(1), top(1),
++ * killall(1) and the like may obtain all the process information they need to
++ * do their jobs. Now you may ask, "Why not use /proc? BSD uses /proc.".
++ * Thanks for asking. /proc is designed as a virtual filesystem. As such it
++ * presents all of its information in a nice, human readable format. But not
++ * human readable enough that mere mortals can actually look at the /proc
++ * information and know what is happening on their computer (which is why we
++ * have nice programs like ps(1) to help us out. Additionally, for ps (using
++ * /proc) to do its job, it has to do something like:
++ *
++ * dir = opendir("/proc");
++ * while ((entry = readdir(dir)) != NULL) {
++ * if (!isdigit(*entry->d_name))
++ * continue;
++ * open_lots_of files();
++ * parse_lots_of_strings();
++ * close_lots_of_files();
++ * print_stuff();
++ * }
++ *
++ *
++ * This is bad, because:
++ *
++ * 1) opening and closing lots of files is slow,
++ *
++ * 2) parsing lots of strings is slow,
++ *
++ * 3) every one of those strings had to be carefully printed out and formatted
++ * by the kernel, which is slow,
++ *
++ * 4) using a virtual filesystem is not the traditional UN*X solution to
++ * getting information from the kernel out to userspace (ioctls and syscalls
++ * are the established way to do this), and worst of all
++ *
++ * 5) having a virtual filesystem around has been so inviting that everyone has
++ * put their own weird little files into it, causing /proc to become a
++ * cluttered rubbish heap of 64 flavors of strange that takes a ridiculous
++ * amount of memory.
++ *
++ * This driver is the first step in my evil plan to completely
++ * dismantle /proc. Muhahahaha!
++ *
++ * Suggestions are welcome. Patches that work are more welcome though. ;-)
++ *
++ * When using this driver, running:
++ * mknod /dev/ps c 10 21
++ * could be considered helpful.
++ *
++ * ----------------------------------
++ * 1.00 Mar 07, 2000 -- Initial version.
++ *
++ *
++ * TODO
++ * ----------------------------------
++ *
++ * * Right now none of the vm or fd info is being returned to user space.
++ * * There is probably other stuff that should be exported to user space.
++ *
++ *
++ *************************************************************************/
++
++#define DEVPS_VERSION "1.00"
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/sched.h>
++#include <linux/fs.h>
++#include <linux/mm.h>
++#include <linux/pagemap.h>
++#include <linux/malloc.h>
++#include <linux/miscdevice.h>
++#include <linux/devps.h>
++#include <linux/wrapper.h>
++#include <asm/pgtable.h>
++#include <asm/uaccess.h>
++
++/* Some variables used by this device */
++static struct wait_queue *devps_waitq = NULL;
++static int devps_already_opened = 0;
++
++/****************************************************************************
++ * Handle opening and closing of the device
++ */
++
++static int devps_open (struct inode *ip, struct file *fp)
++{
++ /* Only let one process use us at any time -- putting other
++ * processes to sleep. Those opening us O_NONBLOCK will
++ * get an EAGAIN error */
++ if ((fp->f_flags & O_NONBLOCK) && devps_already_opened)
++ return -EAGAIN;
++
++ MOD_INC_USE_COUNT;
++
++ while (devps_already_opened) {
++ int i, got_signal=0;
++
++ /* Go to sleep until we get woken up
++ * by devps_close or we receive a signal */
++ module_interruptible_sleep_on(&devps_waitq);
++
++ for(i=0; i<_NSIG_WORDS && !got_signal; i++)
++ got_signal = current->signal.sig[i] & ~current->blocked.sig[i];
++
++ /* If we got a signal, decrement the use count
++ * and return to user space */
++ if (got_signal) {
++ MOD_DEC_USE_COUNT;
++ return -EINTR;
++ }
++ }
++
++ /* Since we got here, then device_already_opened must equal 0 */
++ devps_already_opened=1;
++ return 0;
++}
++
++static int devps_release (struct inode *ip, struct file *fp)
++{
++ /* Zero out the reference counter */
++ devps_already_opened=0;
++
++ /* Wake up anybody that is waiting to access this device */
++ module_wake_up(&devps_waitq);
++
++ MOD_DEC_USE_COUNT;
++ return 0;
++}
++
++
++/*
++ * This pretty-prints the pathname of a dentry,
++ * clarifying sockets etc.
++ */
++static int
++get_name_from_dentry (struct dentry *dentry, char *buffer, int buflen)
++{
++ struct inode *inode;
++ char *tmp = (char *) __get_free_page (GFP_KERNEL), *path, *pattern;
++ int len;
++
++ if (tmp == NULL)
++ return -ENOMEM;
++
++ /* Check for special dentries.. */
++ pattern = NULL;
++ inode = dentry->d_inode;
++ if (inode && dentry->d_parent == dentry) {
++ if (S_ISSOCK (inode->i_mode))
++ pattern = "socket:[%lu]";
++ if (S_ISFIFO (inode->i_mode))
++ pattern = "pipe:[%lu]";
++ }
++
++ if (pattern) {
++ len = sprintf (tmp, pattern, inode->i_ino);
++ path = tmp;
++ } else {
++ path = d_path (dentry, tmp, PAGE_SIZE);
++ len = tmp + PAGE_SIZE - 1 - path;
++ }
++
++ if (len < buflen)
++ buflen = len;
++ dput (dentry);
++ strncpy (buffer, path, buflen);
++ free_page ((unsigned long) tmp);
++ return buflen;
++}
++
++static unsigned long get_phys_addr (struct task_struct *p,
++ unsigned long ptr)
++{
++ pgd_t *page_dir;
++ pmd_t *page_middle;
++ pte_t pte;
++
++ if (!p || !p->mm || ptr >= TASK_SIZE)
++ return 0;
++ /* Check for NULL pgd .. shouldn't happen! */
++ if (!p->mm->pgd) {
++ printk ("get_phys_addr: pid %d has NULL pgd!\n", p->pid);
++ return 0;
++ }
++
++ page_dir = pgd_offset (p->mm, ptr);
++ if (pgd_none (*page_dir))
++ return 0;
++ if (pgd_bad (*page_dir)) {
++ printk ("bad page directory entry %08lx\n",
++ pgd_val (*page_dir));
++ pgd_clear (page_dir);
++ return 0;
++ }
++ page_middle = pmd_offset (page_dir, ptr);
++ if (pmd_none (*page_middle))
++ return 0;
++ if (pmd_bad (*page_middle)) {
++ printk ("bad page middle entry %08lx\n",
++ pmd_val (*page_middle));
++ pmd_clear (page_middle);
++ return 0;
++ }
++ pte = *pte_offset (page_middle, ptr);
++ if (!pte_present (pte))
++ return 0;
++ return pte_page (pte) + (ptr & ~PAGE_MASK);
++}
++
++static int get_array (struct task_struct *p, unsigned long start,
++ unsigned long end, char *buffer)
++{
++ unsigned long addr;
++ int size = 0, result = 0;
++ char c;
++
++ if (start >= end)
++ return result;
++ for (;;) {
++ addr = get_phys_addr (p, start);
++ if (!addr)
++ return result;
++ do {
++ c = *(char *) addr;
++ if (!c)
++ result = size;
++ if (size < PAGE_SIZE)
++ buffer[size++] = c;
++ else
++ return result;
++ addr++;
++ start++;
++ if (!c && start >= end)
++ return result;
++ } while (addr & ~PAGE_MASK);
++ }
++ return result;
++}
++
++static int
++devps_ioctl (struct inode *ip, struct file *fp,
++ unsigned int cmd, unsigned long arg)
++{
++ switch (cmd) {
++
++ /* Count up the total number of processes,
++ * and then return that total */
++ case DEVPS_GET_NUM_PIDS:{
++ struct task_struct *p;
++ pid_t num_pids = 0;
++
++ read_lock (&tasklist_lock);
++ for_each_task (p) {
++ if (!p->pid)
++ continue;
++ num_pids++;
++ }
++ read_unlock (&tasklist_lock);
++
++ copy_to_user_ret ((pid_t *) arg, &num_pids,
++ sizeof (num_pids), -EFAULT);
++ return 0;
++ }
++
++ /* Returns an array containing all current pids, where
++ pidlist[0]=number of PIDs in the array. pidlist[0] also
++ specifies the size of the array for the kernel to
++ fill... */
++ case DEVPS_GET_PID_LIST:{
++ struct task_struct *p;
++ pid_t *pid_array = NULL;
++ pid_t num_pids;
++ int stat;
++
++ /* Grab the first element to see how many * entries
++ they want us to fill */
++ stat = verify_area (VERIFY_READ, (char *) arg,
++ sizeof (pid_t));
++ if (stat) {
++ printk (KERN_INFO
++ "devps: can't tell how many "
++ "to pid's to write.\n");
++ return stat;
++ }
++
++ copy_from_user (&num_pids, (void *) arg,
++ sizeof (num_pids));
++
++ /* Now make sure we can write the specified amount
++ of stuff into the array. If we can't we might
++ as well quit now and save ourselves the bother. */
++ stat = verify_area (VERIFY_WRITE, (char *) arg,
++ sizeof (pid_t) * num_pids);
++ if (stat) {
++ printk (KERN_INFO
++ "devps: Insufficient space was "
++ "provided to write %d pid's.\n",
++ num_pids);
++ return stat;
++ }
++
++ /* Allocate some memory to hold this stuff in before
++ * we copy it out to user-space */
++ pid_array = (pid_t *) kmalloc (num_pids *
++ sizeof (pid_t),
++ GFP_KERNEL);
++ if (pid_array == NULL)
++ return -ENOMEM;
++
++ /* Now march through the PID list */
++ pid_array[0] = 0;
++ read_lock (&tasklist_lock);
++ for_each_task (p) {
++ if (!p->pid)
++ continue;
++ (pid_array[0])++;
++ if (pid_array[0] >= (num_pids - 1))
++ continue;
++ pid_array[pid_array[0]] = p->pid;
++ }
++ read_unlock (&tasklist_lock);
++
++ /* Copy out to the user the number we actually filled
++ */
++ copy_to_user_ret ((void *) arg, pid_array,
++ sizeof (pid_t) * pid_array[0],
++ -EFAULT);
++ kfree (pid_array);
++
++ return 0;
++ }
++
++ /* Find the details on a particular pid, and fill out a
++ struct with all the gory details. */
++ case DEVPS_GET_PID_INFO:{
++ struct task_struct *p;
++ struct pid_info mypidinfo;
++ unsigned int state;
++ /* 'R' running */
++ /* 'S' sleeping */
++ /* 'D' disk sleep */
++ /* 'Z' zombie */
++ /* 'T' stopped */
++ /* 'W' paging */
++ const char *state_string = "RSDZTW";
++
++ copy_from_user_ret (&mypidinfo,
++ (struct pid_info *) arg,
++ sizeof (mypidinfo), -EFAULT);
++
++ read_lock (&tasklist_lock);
++ p = find_task_by_pid (mypidinfo.pid);
++ read_unlock (&tasklist_lock);
++
++ /* Now copy all this crap so we can tell user space
++ all about it. ick. */
++ memset (mypidinfo.name, 0,
++ sizeof (mypidinfo.name));
++ strcpy (mypidinfo.name, p->comm);
++ mypidinfo.flags = p->flags;
++ mypidinfo.pgrp = p->pgrp;
++ mypidinfo.tms_cutime = p->times.tms_cutime;
++ mypidinfo.tms_cstime = p->times.tms_cstime;
++ mypidinfo.tms_utime = p->times.tms_utime;
++ mypidinfo.tms_stime = p->times.tms_stime;
++ mypidinfo.min_flt = p->min_flt;
++ mypidinfo.cmin_flt = p->cmin_flt;
++ mypidinfo.maj_flt = p->maj_flt;
++ mypidinfo.cmaj_flt = p->cmaj_flt;
++ mypidinfo.session = p->session;
++ mypidinfo.pid = p->pid;
++ mypidinfo.ppid = p->p_pptr->pid;
++ mypidinfo.tty =
++ p->tty ? kdev_t_to_nr (p->tty->device) : 0;
++ mypidinfo.start_time = p->start_time;
++ mypidinfo.uid = p->uid;
++ mypidinfo.euid = p->euid;
++ mypidinfo.suid = p->suid;
++ mypidinfo.fsuid = p->fsuid;
++ mypidinfo.gid = p->gid;
++ mypidinfo.egid = p->egid;
++ mypidinfo.sgid = p->sgid;
++ mypidinfo.fsgid = p->fsgid;
++ mypidinfo.priority = 20 - (p->counter * 10 +
++ DEF_PRIORITY / 2) / DEF_PRIORITY;
++ mypidinfo.nice = 20 - (mypidinfo.priority * 20 +
++ DEF_PRIORITY / 2) / DEF_PRIORITY;
++ state = p-> state & (TASK_RUNNING | TASK_INTERRUPTIBLE
++ | TASK_UNINTERRUPTIBLE |
++ TASK_ZOMBIE | TASK_STOPPED |
++ TASK_SWAPPING);
++ while (state) {
++ state_string++;
++ state >>= 1;
++ }
++ mypidinfo.state = *state_string;
++ mypidinfo.processor = p->processor;
++ mypidinfo.nswap = p->nswap;
++ mypidinfo.cnswap = p->cnswap;
++ if (p && p->mm) {
++ char *page = NULL;
++
++ /* Look for some elbow room */
++ if (!(page = (char*)get_free_page (GFP_KERNEL)))
++ return -ENOMEM;
++ /* Grab the command line */
++ get_array (p, p->mm->arg_start,
++ p->mm->arg_end, page);
++ memcpy( mypidinfo.command_line, page, sizeof( mypidinfo.command_line));
++ mypidinfo.command_line[sizeof( mypidinfo.command_line)-1]='\0';
++
++ /* Grab the environment */
++ memset (page, 0, PAGE_SIZE);
++ get_array (p, p->mm->env_start,
++ p->mm->env_end, page);
++ memcpy( mypidinfo.environment, page, sizeof( mypidinfo.environment));
++ mypidinfo.command_line[sizeof( mypidinfo.environment)-1]='\0';
++ free_page ((unsigned long) page);
++ }
++ memset (mypidinfo.cwd, 0, sizeof (mypidinfo.cwd));
++ get_name_from_dentry (dget (p->fs->pwd), mypidinfo.cwd,
++ sizeof (mypidinfo.cwd));
++ memset (mypidinfo.root, 0, sizeof (mypidinfo.root));
++ get_name_from_dentry (dget (p->fs->root),
++ mypidinfo.root,
++ sizeof (mypidinfo.root));
++
++ copy_to_user_ret ((struct pid_info *) arg,
++ &mypidinfo, sizeof (mypidinfo),
++ -EFAULT);
++
++ return 0;
++ }
++
++ /* Return the PID of the current process */
++ case DEVPS_GET_CURRENT_PID:{
++ return current->pid;
++ }
++
++ default:
++ return -EINVAL;
++
++ }
++ return 0;
++}
++
++
++
++/****************************************************************************
++ * Set up the file operations devps will support
++ */
++static struct file_operations devps_fops = {
++ NULL, /* No lseek */
++ NULL, /* No read */
++ NULL, /* No write */
++ NULL, /* No readdir */
++ NULL, /* No poll */
++ devps_ioctl,
++ NULL, /* No mmap */
++ devps_open,
++ NULL, /* flush */
++ devps_release,
++ NULL, /* fsync */
++ NULL, /* fasync */
++ NULL, /* check_media_change */
++ NULL /* revalidate */
++};
++
++static struct miscdevice devps_misc_dev = {
++ DEVPS_MINOR,
++ "devps",
++ &devps_fops
++};
++
++/* The real driver initialization function */
++extern int devps_init (void)
++{
++ printk (KERN_INFO "devps driver %s loaded\n", DEVPS_VERSION);
++
++ if (misc_register (&devps_misc_dev)) {
++ printk ("devps: unable to get misc device %d\n",
++ DEVPS_MINOR);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++#ifdef MODULE
++
++MODULE_AUTHOR ("Erik Andersen <andersee@debian.org>");
++MODULE_DESCRIPTION
++ ("devps driver -- exports kernel process information to user space");
++
++
++/* Stub driver initialization function */
++int init_module (void)
++{
++ return (devps_init ());
++}
++
++void cleanup_module (void)
++{
++ printk (KERN_INFO "devps driver unloaded\n");
++ misc_deregister (&devps_misc_dev);
++}
++
++#endif /* endif MODULE */
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/makedevps.sh linux/drivers/char/makedevps.sh
+--- linux-2.2.15-pre13.virgin/drivers/char/makedevps.sh Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/makedevps.sh Tue Mar 7 23:31:52 2000
+@@ -0,0 +1,6 @@
++#!/bin/sh -x
++
++gcc -Wall -g -I /usr/src/linux/include ps-devps.c -o ps-devps
++gcc -Wall -g -I /usr/src/linux/include mounts.c -o mounts
++gcc -Wall -g -I /usr/src/linux/include modules.c -o modules
++
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/misc.c linux/drivers/char/misc.c
+--- linux-2.2.15-pre13.virgin/drivers/char/misc.c Tue Mar 7 19:46:58 2000
++++ linux/drivers/char/misc.c Tue Mar 7 19:52:45 2000
+@@ -84,6 +84,8 @@
+ extern void hfmodem_init(void);
+ extern int pc110pad_init(void);
+ extern int pmu_device_init(void);
++extern int devps_init(void);
++extern int devmtab_init(void);
+
+ static int misc_read_proc(char *buf, char **start, off_t offset,
+ int len, int *eof, void *private)
+@@ -267,6 +269,12 @@
+ #endif
+ #ifdef CONFIG_PMAC_PBOOK
+ pmu_device_init();
++#endif
++#ifdef CONFIG_DEVPS
++ devps_init();
++#endif
++#ifdef CONFIG_DEVMTAB
++ devmtab_init();
+ #endif
+ #ifdef CONFIG_SGI_NEWPORT_GFX
+ gfx_register ();
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/modules.c linux/drivers/char/modules.c
+--- linux-2.2.15-pre13.virgin/drivers/char/modules.c Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/modules.c Tue Mar 7 23:35:26 2000
+@@ -0,0 +1,102 @@
++/* vi: set sw=4 ts=4: */
++/*
++ * devmodules tester
++ *
++ *
++ * Copyright (C) 2000 by Erik Andersen <andersee@debian.org>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <errno.h>
++#include <string.h>
++#include <unistd.h>
++#include <time.h>
++#include <fcntl.h>
++#include <sys/ioctl.h>
++#include <sys/types.h>
++#include <linux/devmodules.h>
++
++
++int main (int argc, char **argv)
++{
++ char device[80] = "/dev/modules";
++ int fd; /* file descriptor for devmodules device */
++ int i, num_modules;
++ struct k_module_item *modlist;
++
++ if (argc > 1 && **(argv + 1) == '-') {
++ fprintf(stderr, "Usage: modules\n\nLists loaded modules\n\nThis version of modules accepts no options.\n\n");
++ exit(1);
++ }
++
++ /* open device */
++ fd = open(device, O_RDONLY);
++ if (fd < 0) {
++ fprintf (stderr, "open failed for `%s': %s\n",
++ device, strerror (errno));
++ exit (1);
++ }
++
++ /* How many modules? We need to know to allocate
++ * enough space for later... */
++ num_modules = ioctl (fd, DEVMODULES_COUNT_MODULES);
++ if (num_modules<0) {
++ fprintf (stderr, "\nDEVMODULES_COUNT_MODULES: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++ modlist = (struct k_module_item *) calloc ( num_modules, sizeof(struct k_module_item));
++
++ /* Grab the list of loaded modules */
++ if (ioctl (fd, DEVMODULES_GET_MODULES_LIST, modlist)<0) {
++ fprintf (stderr, "\nDEVMODULES_GET_MODULES_LIST: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++ fprintf( stdout, "\nEquivalent of /proc/modules:\n");
++ for( i = 0 ; i < num_modules ; i++) {
++ fprintf( stdout, "%-20s%8lu%4ld", modlist[i].name,
++ modlist[i].size, modlist[i].usecount);
++ if (modlist[i].flags & MOD_DELETED)
++ fprintf( stdout, " (deleted)");
++ else if (modlist[i].flags & MOD_RUNNING) {
++ if (modlist[i].flags & MOD_AUTOCLEAN)
++ fprintf( stdout, " (autoclean)");
++ if (!(modlist[i].flags & MOD_USED_ONCE))
++ fprintf( stdout, " (unused)");
++ }
++ else if (modlist[i].flags & MOD_INITIALIZING)
++ fprintf( stdout, " (initializing)");
++ else
++ fprintf( stdout, " (uninitialized)");
++ /* TODO: Add in module reference list */
++ fprintf( stdout, "\n");
++ }
++
++ /* Clean up */
++ free( modlist);
++ if (close (fd) != 0) {
++ fprintf (stderr, "close failed for `%s': %s\n",
++ device, strerror (errno));
++ exit (1);
++ }
++
++ exit (0);
++}
++
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/mounts.c linux/drivers/char/mounts.c
+--- linux-2.2.15-pre13.virgin/drivers/char/mounts.c Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/mounts.c Tue Mar 7 23:29:27 2000
+@@ -0,0 +1,124 @@
++/* vi: set sw=4 ts=4: */
++/*
++ * devmtab tester
++ *
++ *
++ * Copyright (C) 2000 by Erik Andersen <andersee@debian.org>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <errno.h>
++#include <string.h>
++#include <unistd.h>
++#include <time.h>
++#include <fcntl.h>
++#include <sys/ioctl.h>
++#include <sys/types.h>
++#include <linux/devmtab.h>
++
++
++int main (int argc, char **argv)
++{
++ char device[80] = "/dev/mtab";
++ int fd; /* file descriptor for devmtab device */
++ int i, numfilesystems;
++ struct k_fstype *fslist;
++ struct k_mntent *mntentlist;
++
++ if (argc > 1 && **(argv + 1) == '-') {
++ fprintf(stderr, "Usage: mounts\n\nReport mounted stuff\n\nThis version of mounts accepts no options.\n\n");
++ exit(1);
++ }
++
++ /* open device */
++ if ((fd = open(device, O_RDONLY)) < 0) {
++ fprintf (stderr, "open failed for `%s': %s\n",
++ device, strerror (errno));
++ exit (1);
++ }
++
++ /* How many filesystems? We need to know to allocate
++ * enough space for later... */
++ numfilesystems = ioctl (fd, DEVMTAB_COUNT_FILESYSTEMS);
++ if (numfilesystems<0) {
++ fprintf (stderr, "\nDEVMTAB_COUNT_FILESYSTEMS: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++ fslist = (struct k_fstype *) calloc ( numfilesystems, sizeof(struct k_fstype));
++
++ /* Grab the list of available filesystems */
++ if (ioctl (fd, DEVMTAB_GET_FILESYSTEMS, fslist)<0) {
++ fprintf (stderr, "\nDEVMTAB_GET_FILESYSTEMS: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++ fprintf( stdout, "\nEquivalent of /proc/filesystems:\n");
++ for( i = 0 ; i < numfilesystems ; i++) {
++ fprintf( stdout, "%s%s\n", fslist[i].mnt_type,
++ (fslist[i].mnt_nodev)? " nodev" : "");
++ }
++
++
++ /* How many mounted filesystems? We need to know to
++ * allocate enough space for later... */
++ numfilesystems = ioctl (fd, DEVMTAB_COUNT_MOUNTS);
++ if (numfilesystems<0) {
++ fprintf (stderr, "\nDEVMTAB_COUNT_MOUNTS: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++ mntentlist = (struct k_mntent *) calloc ( numfilesystems, sizeof(struct k_mntent));
++
++ /* Grab the list of mounted filesystems */
++ if (ioctl (fd, DEVMTAB_GET_MOUNTS, mntentlist)<0) {
++ fprintf (stderr, "\nDEVMTAB_GET_MOUNTS: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++
++ fprintf( stdout, "\nEquivalent of /proc/mounts:\n");
++ for( i = 0 ; i < numfilesystems ; i++) {
++ fprintf( stdout, "%s %s %s %s %d %d\n", mntentlist[i].mnt_fsname,
++ mntentlist[i].mnt_dir, mntentlist[i].mnt_type,
++ mntentlist[i].mnt_opts, mntentlist[i].mnt_freq,
++ mntentlist[i].mnt_passno);
++ }
++
++
++ /* Change the root filesystem's device name */
++ if (ioctl (fd, DEVMTAB_SET_ROOTFS_DEVNAME, "/dev/foo")<0) {
++ fprintf (stderr, "\nDEVMTAB_SET_ROOTFS_DEVNAME: %s\n",
++ strerror (errno));
++ exit (1);
++ }
++
++
++ /* clean up */
++ free( fslist);
++ free( mntentlist);
++ if (close (fd) != 0) {
++ fprintf (stderr, "close failed for `%s': %s\n",
++ device, strerror (errno));
++ exit (1);
++ }
++
++ exit (0);
++}
++
+diff -ur --new-file linux-2.2.15-pre13.virgin/drivers/char/ps-devps.c linux/drivers/char/ps-devps.c
+--- linux-2.2.15-pre13.virgin/drivers/char/ps-devps.c Wed Dec 31 17:00:00 1969
++++ linux/drivers/char/ps-devps.c Tue Mar 7 19:52:45 2000
+@@ -0,0 +1,147 @@
++/* vi: set sw=4 ts=4: */
++/*
++ * Mini ps implementation for use with the Linux devps driver
++ *
++ *
++ * Copyright (C) 2000 by Erik Andersen <andersee@debian.org>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <errno.h>
++#include <string.h>
++#include <unistd.h>
++#include <time.h>
++#include <fcntl.h>
++#include <sys/ioctl.h>
++#include <linux/devps.h>
++#include <pwd.h>
++#include <grp.h>
++#include <sys/types.h>
++
++
++#define MAX_COLUMN 79
++
++int
++main (int argc, char **argv)
++{
++ char device[80] = "/dev/ps";
++ int i, j, len;
++ int fd; /* file descriptor for devps device */
++ int status; /* return status for system calls */
++ pid_t num_pids;
++ pid_t* pid_array = NULL;
++ struct pid_info info;
++ struct passwd *pwd;
++ struct group *grp;
++ char uidName[10] = "";
++ char groupName[10] = "";
++
++ if (argc > 1 && **(argv + 1) == '-') {
++ fprintf(stderr, "Usage: ps-devps\n\nReport process status\n\nThis version of ps accepts no options.\n\n");
++ exit(1);
++ }
++
++ /* open device */
++ fd = open(device, O_RDWR);
++ if (fd < 0) {
++ fprintf (stderr, "open failed for `%s': %s\n",
++ device, strerror (errno));
++ goto error;
++ }
++
++ /* Find out how many processes there are */
++ status = ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids);
++ if (status<0) {
++ fprintf (stderr, "\nDEVPS_GET_PID_LIST: %s\n",
++ strerror (errno));
++ goto error;
++ }
++
++ /* Allocate some memory -- grab a few extras just in case
++ * some new processes start up while we wait. The kernel will
++ * just ignore any extras if we give it too many, and will trunc.
++ * the list if we give it too few. */
++ pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
++ pid_array[0] = num_pids+10;
++
++ /* Now grab the pid list */
++ status = ioctl (fd, DEVPS_GET_PID_LIST, pid_array);
++ if (status<0) {
++ fprintf (stderr, "\nDEVPS_GET_PID_LIST: %s\n",
++ strerror (errno));
++ goto error;
++ }
++
++ /* Print up a ps listing */
++ fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
++ "State", "Command");
++
++ for (i=1; i<pid_array[0] ; i++) {
++ info.pid = pid_array[i];
++ status = ioctl (fd, DEVPS_GET_PID_INFO, &info);
++ if (status<0) {
++ fprintf (stderr, "\nDEVPS_GET_PID_INFO: %s\n",
++ strerror (errno));
++ goto error;
++ }
++ /* Make some adjustments as needed */
++ pwd = getpwuid(info.euid);
++ if (pwd == NULL)
++ sprintf(uidName, "%lu", info.euid);
++ else
++ sprintf(uidName, "%s", pwd->pw_name);
++ grp = getgrgid(info.egid);
++ if (grp == NULL)
++ sprintf(groupName, "%lu", info.egid);
++ else
++ sprintf(groupName, "%s", grp->gr_name);
++
++ len = fprintf(stdout, "%5d %-8s %-8s %c ", info.pid, uidName, groupName, info.state);
++
++ if (strlen(info.command_line) > 1) {
++ for( j=0; j<(sizeof(info.command_line)-1) && j < (MAX_COLUMN-len); j++) {
++ if (*(info.command_line+j) == '\0' && *(info.command_line+j+1) != '\0') {
++ *(info.command_line+j) = ' ';
++ }
++ }
++ *(info.command_line+j) = '\0';
++ fprintf(stdout, "%s\n", info.command_line);
++ } else {
++ fprintf(stdout, "[%s]\n", info.name);
++ }
++ }
++
++ /* Free memory */
++ free( pid_array);
++
++ /* close device */
++ status = close (fd);
++ if (status != 0) {
++ fprintf (stderr, "close failed for `%s': %s\n",
++ device, strerror (errno));
++ goto error;
++ }
++
++ exit (0);
++error:
++ fflush(stdout);
++ fflush(stderr);
++ exit (1);
++}
++
+diff -ur --new-file linux-2.2.15-pre13.virgin/fs/Makefile linux/fs/Makefile
+--- linux-2.2.15-pre13.virgin/fs/Makefile Mon Mar 6 10:23:14 2000
++++ linux/fs/Makefile Tue Mar 7 19:52:45 2000
+@@ -11,9 +11,10 @@
+ L_OBJS = $(join $(SUB_DIRS),$(SUB_DIRS:%=/%.o))
+ O_TARGET := fs.o
+ O_OBJS = open.o read_write.o devices.o file_table.o buffer.o \
+- super.o block_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
++ block_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
+ ioctl.o readdir.o select.o fifo.o locks.o filesystems.o \
+ dcache.o inode.o attr.o bad_inode.o file.o $(BINFMTS)
++OX_OBJS = super.o
+
+ MOD_LIST_NAME := FS_MODULES
+ ALL_SUB_DIRS = coda minix ext2 fat msdos vfat proc isofs nfs umsdos ntfs \
+diff -ur --new-file linux-2.2.15-pre13.virgin/fs/proc/array.c linux/fs/proc/array.c
+--- linux-2.2.15-pre13.virgin/fs/proc/array.c Tue Mar 7 19:47:04 2000
++++ linux/fs/proc/array.c Tue Mar 7 19:52:45 2000
+@@ -44,6 +44,7 @@
+ *
+ */
+
++#include <linux/module.h>
+ #include <linux/types.h>
+ #include <linux/errno.h>
+ #include <linux/sched.h>
+@@ -1306,10 +1307,6 @@
+ }
+ #endif
+
+-#ifdef CONFIG_MODULES
+-extern int get_module_list(char *);
+-extern int get_ksyms_list(char *, char **, off_t, int);
+-#endif
+ extern int get_device_list(char *);
+ extern int get_partition_list(char *);
+ extern int get_filesystem_list(char *);
+diff -ur --new-file linux-2.2.15-pre13.virgin/fs/super.c linux/fs/super.c
+--- linux-2.2.15-pre13.virgin/fs/super.c Tue Jan 4 11:12:23 2000
++++ linux/fs/super.c Tue Mar 7 19:52:45 2000
+@@ -18,6 +18,7 @@
+ */
+
+ #include <linux/config.h>
++#include <linux/module.h>
+ #include <linux/malloc.h>
+ #include <linux/locks.h>
+ #include <linux/smp_lock.h>
+@@ -25,6 +26,7 @@
+ #include <linux/init.h>
+ #include <linux/quotaops.h>
+ #include <linux/acct.h>
++#include <linux/devmtab.h>
+
+ #include <asm/uaccess.h>
+
+@@ -309,7 +311,57 @@
+ { 0, NULL }
+ };
+
+-int get_filesystem_info( char *buf )
++
++extern int count_mounted_filesystems()
++{
++ struct vfsmount *tmp = vfsmntlist;
++ int count = 0;
++
++ while (tmp)
++ {
++ tmp = tmp->mnt_next;
++ count++;
++ }
++
++ return count;
++}
++EXPORT_SYMBOL(count_mounted_filesystems);
++
++
++extern void get_mtab_entries( int count, struct k_mntent* mntentlist)
++{
++ struct vfsmount *tmp = vfsmntlist;
++ struct proc_fs_info *fs_infop;
++ int i = 0, len;
++
++ while (tmp && i < count)
++ {
++ strncpy(mntentlist[i].mnt_fsname, tmp->mnt_devname,
++ sizeof(mntentlist[i].mnt_fsname));
++ strncpy(mntentlist[i].mnt_dir, tmp->mnt_dirname,
++ sizeof(mntentlist[i].mnt_dir));
++ strncpy(mntentlist[i].mnt_type, tmp->mnt_sb->s_type->name,
++ sizeof(mntentlist[i].mnt_type));
++ len = 0;
++ len+=sprintf(mntentlist[i].mnt_opts, "%s",
++ tmp->mnt_flags & MS_RDONLY ? "ro" : "rw");
++ for (fs_infop = fs_info; fs_infop->flag; fs_infop++) {
++ if (tmp->mnt_flags & fs_infop->flag) {
++ strncpy(mntentlist[i].mnt_opts+len, fs_infop->str,
++ sizeof(mntentlist[i].mnt_opts)-len);
++ len += strlen(fs_infop->str);
++ }
++ }
++
++ /* TODO -- add in NFS stuff */
++
++ tmp = tmp->mnt_next;
++ i++;
++ }
++}
++EXPORT_SYMBOL(get_mtab_entries);
++
++extern int get_filesystem_info( char *buf )
+ {
+ struct vfsmount *tmp = vfsmntlist;
+ struct proc_fs_info *fs_infop;
+@@ -379,8 +431,54 @@
+
+ return len;
+ }
++EXPORT_SYMBOL(get_filesystem_info);
++
++extern int count_kfstypes()
++{
++ struct file_system_type * tmp = file_systems;
++ int count = 0;
++
++ while (tmp) {
++ count++;
++ tmp = tmp->next;
++ }
++
++ return count;
++}
++EXPORT_SYMBOL(count_kfstypes);
++
++extern int set_root_filesystem_name( char *newname)
++{
++ struct vfsmount *tmp = vfsmntlist;
++ char *name;
++
++ if (tmp && newname) {
++ kfree( tmp->mnt_devname);
++ name = (char *) kmalloc(strlen(newname)+1, GFP_KERNEL);
++ if (!name)
++ return -ENOMEM;
++ strcpy(name, newname);
++ tmp->mnt_devname = name;
++ }
++ return 0;
++}
++EXPORT_SYMBOL(set_root_filesystem_name);
++
++extern void get_kfstype_list(int count, struct k_fstype* fstypelist)
++{
++ int i = 0;
++ struct file_system_type * tmp = file_systems;
++
++ while (tmp && i < count) {
++ strncpy(fstypelist[i].mnt_type, tmp->name, sizeof(fstypelist[i].mnt_type));
++ fstypelist[i].mnt_nodev = (tmp->fs_flags & FS_REQUIRES_DEV)? 0 : 1;
++ tmp = tmp->next;
++ i++;
++ }
++}
++EXPORT_SYMBOL(get_kfstype_list);
+
+-int get_filesystem_list(char * buf)
++extern int get_filesystem_list(char * buf)
+ {
+ int len = 0;
+ struct file_system_type * tmp;
+@@ -394,6 +492,7 @@
+ }
+ return len;
+ }
++EXPORT_SYMBOL(get_filesystem_list);
+
+ struct file_system_type *get_fs_type(const char *name)
+ {
+diff -ur --new-file linux-2.2.15-pre13.virgin/include/linux/devmodules.h linux/include/linux/devmodules.h
+--- linux-2.2.15-pre13.virgin/include/linux/devmodules.h Wed Dec 31 17:00:00 1969
++++ linux/include/linux/devmodules.h Tue Mar 7 23:37:48 2000
+@@ -0,0 +1,55 @@
++/* vi: set sw=8 ts=8: */
++/*
++ * -- <linux/devmodules.h>
++ *
++ * Copyright (C) 2000 Erik Andersen <andersee@debian.org>
++ *
++ * May be copied or modified under the terms of the GNU General Public License.
++ * See linux/COPYING for more information.
++ *
++ * This driver implements an interface whereby programs such as lsmod(8) may
++ * obtain all the information they need to do their jobs without needing to
++ * use /proc.
++ *
++ */
++
++#ifndef _LINUX_DEVMODULES_H
++#define _LINUX_DEVMODULES_H
++
++
++/*******************************************************
++ * The list of all ioctl(2) commands suported by devmodules.
++ * For the devmodules ioctls, I have commandeered some of the
++ * higher bits of byte 0xeb.
++ *******************************************************/
++#define DEVMODULES_COUNT_MODULES 0xebba /* How many modules are there? */
++#define DEVMODULES_GET_MODULES_LIST 0xebbb /* Get a list of all installed modules */
++
++/*******************************************************
++ * devmodules ioctl(2) structures
++ *******************************************************/
++
++/* An array of these is returned by the DEVMODULES_GET_MODULES_LIST ioctl.
++ */
++struct k_module_item {
++ char name[255];/* Name of the module */
++ unsigned long size; /* Size of module in bytes */
++ unsigned long flags; /* Flags set by the module */
++ long usecount; /* Module use count value */
++
++ /* TODO: Add in module reference list */
++
++};
++
++/* Possible bits for k_module_item's flags. */
++#define MOD_UNINITIALIZED 0
++#define MOD_RUNNING 1
++#define MOD_DELETED 2
++#define MOD_AUTOCLEAN 4
++#define MOD_VISITED 8
++#define MOD_USED_ONCE 16
++#define MOD_JUST_FREED 32
++#define MOD_INITIALIZING 64
++
++
++#endif /* _LINUX_DEVMODULES_H */
+diff -ur --new-file linux-2.2.15-pre13.virgin/include/linux/devmtab.h linux/include/linux/devmtab.h
+--- linux-2.2.15-pre13.virgin/include/linux/devmtab.h Wed Dec 31 17:00:00 1969
++++ linux/include/linux/devmtab.h Tue Mar 7 19:52:45 2000
+@@ -0,0 +1,55 @@
++/* vi: set sw=8 ts=8: */
++/*
++ * -- <linux/devmtab.h>
++ *
++ * Copyright (C) 2000 Erik Andersen <andersee@debian.org>
++ *
++ * May be copied or modified under the terms of the GNU General Public License.
++ * See linux/COPYING for more information.
++ *
++ * This driver implements an interface whereby programs such as mount(8),
++ * umount(8), and df(1) may obtain all the process information they need to do
++ * their jobs without needing to use /proc.
++ *
++ */
++
++#ifndef _LINUX_DEVMTAB_H
++#define _LINUX_DEVMTAB_H
++
++
++/*******************************************************
++ * The list of all ioctl(2) commands suported by devmtab.
++ * For the devmtab ioctls, I have commandeered some of the
++ * higher bits of byte 0xeb.
++ *******************************************************/
++#define DEVMTAB_COUNT_FILESYSTEMS 0xebaa /* Get a list of all fs */
++#define DEVMTAB_GET_FILESYSTEMS 0xebab /* Get a list of all fs */
++#define DEVMTAB_COUNT_MOUNTS 0xebac /* Returns number of mounted filesystems */
++#define DEVMTAB_GET_MOUNTS 0xebad /* Get a list of a mounted fs */
++#define DEVMTAB_SET_ROOTFS_DEVNAME 0xebae /* Replace /dev/root with real name */
++
++/*******************************************************
++ * devmtab ioctl(2) structures
++ *******************************************************/
++
++/* An array of these is returned by the DEVMTAB_GET_FILESYSTEMS ioctl.
++ */
++struct k_fstype {
++ char mnt_type[255]; /* filesystem type: ext2, nfs, etc. */
++ int mnt_nodev; /* Is this a device-less filesystem? */
++};
++
++/* An array of these is returned by the DEVMTAB_GET_MOUNTS ioctl.
++ * This struct should be the same as what libc returns via the
++ * getmntent(3) function (excat this comes from the kernel, not
++ * from whatever noise is in /etc/mtab at the moment... */
++struct k_mntent {
++ char mnt_fsname[255]; /* name of mounted file system */
++ char mnt_dir[255]; /* path of file system mount point */
++ char mnt_type[255]; /* filesystem type: ext2, nfs, etc. */
++ char mnt_opts[255]; /* Comma-separated list of mount options */
++ int mnt_freq; /* dump frequency in days */
++ int mnt_passno; /* pass number for parallel fsck */
++};
++
++#endif /* _LINUX_DEVMTAB_H */
+diff -ur --new-file linux-2.2.15-pre13.virgin/include/linux/devps.h linux/include/linux/devps.h
+--- linux-2.2.15-pre13.virgin/include/linux/devps.h Wed Dec 31 17:00:00 1969
++++ linux/include/linux/devps.h Tue Mar 7 19:52:45 2000
+@@ -0,0 +1,78 @@
++/*
++ * -- <linux/devps.h>
++ *
++ * Copyright (C) 2000 Erik Andersen <andersee@debian.org>
++ *
++ * May be copied or modified under the terms of the GNU General Public License.
++ * See linux/COPYING for more information.
++ *
++ * This driver implements an interface whereby programs such as ps(1), top(1),
++ * killall(1) and the like may obtain all the process information they need to
++ * do their jobs.
++ *
++ */
++
++#ifndef _LINUX_DEVPS_H
++#define _LINUX_DEVPS_H
++
++
++/*******************************************************
++ * The list of all ioctl(2) commands suported by devps.
++ * For the devps ioctls, I have commandeered some of the
++ * higher bits of byte 0xeb.
++ *******************************************************/
++#define DEVPS_GET_NUM_PIDS 0xeba1 /* Get a list of all PIDs */
++#define DEVPS_GET_PID_LIST 0xeba2 /* Get a list of all PIDs */
++#define DEVPS_GET_PID_INFO 0xeba3 /* Get info about a specific PID */
++#define DEVPS_GET_CURRENT_PID 0xeba4 /* Get the current PID */
++
++/*******************************************************
++ * devps ioctl(2) structures
++ *******************************************************/
++
++
++struct pid_info
++{
++ char name[16];
++ long flags;
++ pid_t pgrp;
++ clock_t tms_cutime;
++ clock_t tms_cstime;
++ clock_t tms_utime;
++ clock_t tms_stime;
++ unsigned long min_flt;
++ unsigned long cmin_flt;
++ unsigned long maj_flt;
++ unsigned long cmaj_flt;
++ pid_t session;
++ pid_t pid;
++ pid_t ppid;
++ int tty;
++ unsigned long start_time;
++ unsigned long uid,euid,suid,fsuid;
++ unsigned long gid,egid,sgid,fsgid;
++ long priority, nice;
++ char state;
++ int processor;
++ unsigned long nswap, cnswap;
++ char command_line[256];
++ char environment[256];
++ char root[256];
++ char cwd[256];
++#if 0
++ /* TODO: Add in this (and probably more) stuff */
++
++ int resident;
++ int size;
++ int share;
++ unsigned long vsize;
++ char exe[MAX_PATH];
++ unsigned long vm_total, vm_locked, vm_rss, vm_data, vm_stack, vm_exec, vm_lib;
++ unsigned long start_code, end_code, start_data, eip, esp;
++ unsigned long signal, blocked;
++#endif
++
++
++};
++
++#endif /* _LINUX_DEVPS_H */
+diff -ur --new-file linux-2.2.15-pre13.virgin/include/linux/fs.h linux/include/linux/fs.h
+--- linux-2.2.15-pre13.virgin/include/linux/fs.h Mon Mar 6 10:23:14 2000
++++ linux/include/linux/fs.h Tue Mar 7 21:14:11 2000
+@@ -566,6 +566,17 @@
+ struct semaphore s_vfs_rename_sem; /* Kludge */
+ };
+
++/* fs/super.c */
++#include <linux/devmtab.h>
++
++extern int count_kfstypes( void);
++extern void get_kfstype_list( int count, struct k_fstype* fstypelist);
++extern int count_mounted_filesystems( void);
++extern int get_filesystem_info(char *buf);
++extern int get_filesystem_list(char *buf);
++extern void get_mtab_entries( int count, struct k_mntent* mntentlist);
++extern int set_root_filesystem_name( char *newname);
++
+ /*
+ * VFS helper functions..
+ */
+diff -ur --new-file linux-2.2.15-pre13.virgin/include/linux/miscdevice.h linux/include/linux/miscdevice.h
+--- linux-2.2.15-pre13.virgin/include/linux/miscdevice.h Mon Aug 9 13:04:41 1999
++++ linux/include/linux/miscdevice.h Tue Mar 7 22:24:50 2000
+@@ -11,6 +11,9 @@
+ #define APOLLO_MOUSE_MINOR 7
+ #define PC110PAD_MINOR 9
+ #define MAC_MOUSE_MINOR 10
++#define DEVPS_MINOR 21
++#define DEVMTAB_MINOR 22
++#define DEVMODULES_MINOR 23
+ #define WATCHDOG_MINOR 130 /* Watchdog timer */
+ #define TEMP_MINOR 131 /* Temperature Sensor */
+ #define RTC_MINOR 135
+diff -ur --new-file linux-2.2.15-pre13.virgin/include/linux/module.h linux/include/linux/module.h
+--- linux-2.2.15-pre13.virgin/include/linux/module.h Tue Mar 7 19:47:04 2000
++++ linux/include/linux/module.h Tue Mar 7 21:26:48 2000
+@@ -8,6 +8,7 @@
+ #define _LINUX_MODULE_H
+
+ #include <linux/config.h>
++#include <linux/types.h>
+
+ #ifdef __GENKSYMS__
+ # define _set_ver(sym) sym
+@@ -143,6 +144,21 @@
+
+ /* Find a symbol exported by the kernel or another module */
+ extern unsigned long get_module_symbol(char *, char *);
++/* Used by /proc and devmodules to export kernel symbols */
++extern int get_ksyms_list(char *buf, char **start, off_t offset, int length);
++/* Used by /proc and devmodules to export the list of modules
++ * in human readable form */
++extern int get_module_list(char *);
++#if defined CONFIG_DEVMODULES || defined CONFIG_DEVMODULES_MODULE
++#include <linux/devmodules.h>
++/* Used by devmodules to export the list of modules
++ * in machine readable form */
++extern void get_kmodule_list( int count, struct k_module_item* modlst);
++/* Used by devmodules to export the number of modules */
++extern int count_kmodules(void);
++#endif
++
++
+
+ #if defined(MODULE) && !defined(__GENKSYMS__)
+
+diff -ur --new-file linux-2.2.15-pre13.virgin/kernel/Makefile linux/kernel/Makefile
+--- linux-2.2.15-pre13.virgin/kernel/Makefile Wed May 6 12:01:46 1998
++++ linux/kernel/Makefile Tue Mar 7 22:47:07 2000
+@@ -11,11 +11,11 @@
+ $(CPP) -traditional $< -o $*.s
+
+ O_TARGET := kernel.o
+-O_OBJS = sched.o dma.o fork.o exec_domain.o panic.o printk.o sys.o \
+- module.o exit.o itimer.o info.o time.o softirq.o resource.o \
++O_OBJS = sched.o dma.o exec_domain.o panic.o printk.o sys.o \
++ exit.o itimer.o info.o time.o softirq.o resource.o \
+ sysctl.o acct.o capability.o
+
+-OX_OBJS += signal.o
++OX_OBJS += fork.o module.o signal.o
+
+ ifeq ($(CONFIG_KMOD),y)
+ O_OBJS += kmod.o
+diff -ur --new-file linux-2.2.15-pre13.virgin/kernel/fork.c linux/kernel/fork.c
+--- linux-2.2.15-pre13.virgin/kernel/fork.c Tue Oct 26 18:53:42 1999
++++ linux/kernel/fork.c Tue Mar 7 19:52:45 2000
+@@ -36,6 +36,7 @@
+ kmem_cache_t *files_cachep;
+
+ struct task_struct *pidhash[PIDHASH_SZ];
++EXPORT_SYMBOL(pidhash);
+
+ struct task_struct **tarray_freelist = NULL;
+ spinlock_t taskslot_lock = SPIN_LOCK_UNLOCKED;
+diff -ur --new-file linux-2.2.15-pre13.virgin/kernel/module.c linux/kernel/module.c
+--- linux-2.2.15-pre13.virgin/kernel/module.c Tue Mar 7 19:47:05 2000
++++ linux/kernel/module.c Tue Mar 7 22:42:58 2000
+@@ -816,10 +816,40 @@
+ module_unmap(mod);
+ }
+
++/* Used by devmodules to export the number of modules */
++extern int
++count_kmodules(void)
++{
++ int i=0;
++ struct module *mod;
++ for (mod = module_list; mod != &kernel_module; mod = mod->next, i++);
++ return i;
++}
++EXPORT_SYMBOL(count_kmodules);
++
++extern void
++get_kmodule_list( int count, struct k_module_item* modlst)
++{
++ int i = 0;
++ struct module *mod = module_list;
++
++ while (mod && i < count)
++ {
++ strncpy(modlst[i].name, mod->name,
++ sizeof(modlst[i].name));
++ modlst[i].size = mod->size;
++ modlst[i].flags = mod->flags;
++ modlst[i].usecount = (long)atomic_read(&mod->uc.usecount);
++ mod = mod->next;
++ i++;
++ }
++}
++EXPORT_SYMBOL(get_kmodule_list);
++
++
+ /*
+ * Called by the /proc file system to return a current list of modules.
+ */
+-
+ int get_module_list(char *p)
+ {
+ size_t left = PAGE_SIZE;
+@@ -897,11 +927,11 @@
+ fini:
+ return PAGE_SIZE - left;
+ }
++EXPORT_SYMBOL(get_module_list);
+
+ /*
+ * Called by the /proc file system to return a current list of ksyms.
+ */
+-
+ int
+ get_ksyms_list(char *buf, char **start, off_t offset, int length)
+ {
