#!/bin/perl
#
# Copyright (C) 1995 Transarc Corporation - All rights reserved 
#

# afs_rtsymtab.pl	(For IRIX 6.1 only)
# 	This script modifies /var/sysgen/master.d/rtsymtab file so that 
# AFS kernel extentions can be dynamically loaded using /sbin/ml.
# The original version of rtsymtab is saved as 
# /var/sysgen/master.d/rtsymtab.orig. This script must be run only 
# once on each SGI IRIX 5.3 machine that is to be an AFS 3.4 client.
# 
# Usage: afs_rtsymtab.pl -run [-force] [-help]
#



@scriptnameparts = split('/', $0);
$scriptname = pop @scriptnameparts;

$FILE = "/var/sysgen/master.d/rtsymtab";
$LOG = "/tmp/$scriptname.log";

#
# This script must be run by the superuser
# 
die ("\n$scriptname: Sorry, this script must be run by root.\n\n") 
	if ($< != 0);

$USAGE="\nUsage: $scriptname -run [-force] [-help]

	This script modifies $FILE in IRIX 6.1 so that 
	AFS 3.4 kernel extentions may be dynamically loaded using 
	/sbin/ml. A copy of $FILE is saved 
	as $FILE.orig before it is changed. 
	You will need to run this script only once after you install 
	AFS 3.4 on your clients. 

	This script will exit if it determines that 
	$FILE has already been modifed for AFS. 
	If this is incorrect, run this script again with the 
	-force flag.\n\n";
	
#
# Parse command line
#
$run = $force = 0;
for $_ (@ARGV) {
	if (/-run/) {
		$run = 1;
	} elsif (/-force/) {
		$force = 1;
	} else {
		die $USAGE	
	}
}
die $USAGE if (! $run);

#
# The following extern definitions are required by AFS and 
# must be added to $FILE
# These headers are part of the mimimal OS configuration. They should always
# be present on the system.
#
$ExternHeaders = 
"#include <sys/vnode.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <netinet/ip_var.h>
#include <sys/fs_subr.h>
#include <sys/sema.h>";

$ExternDefns =
"extern time(), remapf(), exit(), iget(), iput(), efs_ialloc(),
	iunlock(), estgroups(), setgroups(), setgroupsp(), afs_vfsopsp(),
	afs_vnodeopsp(), afsidestroyp(), afsdptoipp(), afsiptodpp(),
	hostintable(), idbg_prafsnodep(), idbg_afsvfslistp(), 
	checkauth(), __ll_rem(), exported_lock(), rfsdisptab_v3(),
	vattr_to_wcc_data(), vattr_to_wcc_attr(), vattr_to_fattr3(),
	puterrno3(), makefh3(), xdr_string(), xdr_u_long(), xdr_char(),
	xdr_long(), xdr_short(), xdr_bytes(), xdr_opaque(), xdr_u_short(),
	xdr_u_int(), xdr_int(), xdr_array(), vsync(),
	assfail(), in_cksum(), convoff(), debug(),
	stime(), sysent(), syscallsw(), wtodc(), in_ifaddr();";

#
# For each member of @NewSymtabEntries, an entry of the following type must be
# added (if one does not exist) to the rtsymtab[] array.
#
#  {(long) &time,         "time"},                /* DDI/DKI */
#
@NewSymtabEntries = (
"assfail",
"time",
"vmonitor",
"doass",
"pmonitor",
"rmonitor",
"amonitor",
"vn_rele",
"vn_hold",
"vn_rdwr",
"vn_initlist",
"ptossvp",
"cleanlocks",
"crget",
"crdup",
"crhold",
"crfree",
"lookupname",
"sys_cred",
"vfs_devsearch",
"iget",
"iput",
"efs_ialloc",
"falloc",
"iunlock",
"fready",
"vrelvm",
"settime",
"wtodc",
"socreate",
"soreserve",
"sobind",
"soclose",
"xdr_string",
"xdr_u_long",
"xdr_char",
"xdr_long",
"xdr_short",
"xdr_bytes",
"xdr_opaque",
"xdr_u_short",
"xdr_u_int",
"xdr_int",
"xdr_array",
"inetdomain",
"udpcksum",
"ifcksum",
"ip_stripoptions",
"in_cksum",
"stime",
"sysent",
"syscallsw",
"estgroups",
"setgroups",
"setgroupsp",
"afs_vfsopsp",
"afs_vnodeopsp",
"afsidestroyp",
"afsdptoipp",
"afsiptodpp",
"idbg_prafsnodep",
"idbg_afsvfslistp",
"initmonitor",
"pflushinvalvp",
"pflushvp",
"pdflush",
"ngroups_max",
"pinvalfree",
"fs_setfl",
"fs_cmp",
"fs_nosys",
"fs_poll",
"fs_pathconf",
"fs_frlock",
"convoff",
"chunkread",
"getchunk",
"bp_mapin",
"bawrite",
"bwrite",
"fs_map_subr",
"checkauth",
"imon_event",
"imon_enabled",
"exported_lock",
"rfsdisptab_v3",
"getvfs",
"vattr_to_wcc_data",
"vattr_to_wcc_attr",
"vattr_to_fattr3",
"hostintable",
"puterrno3",
"makefh3",
"vsync",
"in_ifaddr",
"irix5_microtime"
);

#
# Check that /var/sysgen/master.d/rtsymtab exists and does not contain
# AFS symbols
#

die ("\n\tError: Cannot find $FILE\n" .
     "\tCheck your Operating System installation documentation.\n") 
    if (! -f $FILE); 
if (! $force && ! system("/bin/grep afs_vnodeops $FILE > /dev/null")) {
	die ("\n\tError: It looks like $FILE has already been 
	modified for dynamically loading AFS. If this is incorrect, run 
	this script again with the -force flag\n\n");
}

#
# Read all the symbols in the rtsymtab[] table from  $FILE
# and mark them in an associative array indexed by the symbol name.
#

open(SYMTAB, "<$FILE") || die("\nError: failed to open $FILE: $!\n");
$found = 0;
while (<SYMTAB>) {		# Skip ahead to rtsymtab definition
	last if /rtsymtab\[\]/;
}
while (<SYMTAB>) {		# Extract the name of each symbol
	if (/{.*,.*"(.*)"}/) {
		$OldSymtabEntries{$1} = 1;
		$found++;
	}
}
#
# Make sure that the above loop worked! 
#
die("Error: Could not locate the rtsymtab\[\] table in $FILE\n\n")
	if (! $found); 

close(SYMTAB);


#
# Check if any of the new symbols that we need to add exist in the rtsymtab
# table. Keep track of all symbols that we delete from NewSymtabEntries.
#

$offset=0;
# This section of code does not work. If a variable is already in the list
# the following variable is not tested. We don't need this anyway, since
# it's ok for an item to be in the list more than once.
#for $var (@NewSymtabEntries) {
#        print "@@@: var: $var\n";
#	if ($OldSymtabEntries{$var}) {
#		$del = splice(@NewSymtabEntries,$offset,1);
#		push(@DelSymtabEntries, $del);
#		print "debug: $var exists\n";
#	}
#        $offset++;
#}

#
# Create the new rtsymtab file.
# Place the new extern definitions just before the rtsymtab[] table 
# definition. Append new entries to the rtsymtab table to the end 
# of the file.
#

open(NEWSYMTAB, ">$FILE.new") || die("Error: Could not open $File.new: $!\n");
open(OLDSYMTAB, "<$FILE") || die("Error: Could not open $FILE: $!\n");

print "Creating $FILE.new\n";

while (<OLDSYMTAB>) {
	if (/rtsymtab\[\] = {/) {
		print NEWSYMTAB "\n /*\n  * The following extern definitions";
		print NEWSYMTAB " are required by AFS\n  */\n";
		print NEWSYMTAB "$ExternHeaders\n\n";
		print NEWSYMTAB "$ExternDefns\n\n";
		print NEWSYMTAB $_;
	} else {
		print NEWSYMTAB $_;
	}
} 

#
# Append the new rtsymtab[] entries to the end of the file
#

print NEWSYMTAB "\t/*\n\t  * The following symbols are required by AFS\n";
print NEWSYMTAB "\t  */\n\n";

foreach $var (@NewSymtabEntries) {
	printf(NEWSYMTAB "\t {(long) &%s,%15s},\t\t%s\n",
			$var, "\"$var\"", "/* DDI/DDK */");
}

close(NEWSYMTAB);
close(OLDSYMTAB);

#
# Replace $FILE with $FILE.new
# 
#print "NOT renaming files!\n";

die ("Error: Could not move $FILE to $FILE.orig: $!\n")
	if (! rename($FILE, "$FILE.orig"));
print "Moved $FILE to $FILE.orig\n";
die ("Error: Could not move $FILE.new to $FILE: $!\n")
	if (! rename("$FILE.new", $FILE));
print "Moved $FILE.new to $FILE\n";


#
# List rtsymtab[] entries that were not added to the new file.
# 

if ($#DelSymtabEntries >= 0) {

	open(LOGFILE,">$LOG") || die("Error: Could not open $LOG: $!");

	print LOGFILE "\n\n\tThe following entries were already defined 
	in the rtsymtab\[\] table in $FILE.
	View $FILE and verify the correctness of these entries.
	Make sure that these entries are correctly defined for this 
	machine. \n\n";

	for $var (@DelSymtabEntries) {
		printf(LOGFILE "\t {(long) &%s,%15s},\t\t%s\n",
				$var, "\"$var\"", "/* DDI/DDK */");
	}
	print LOGFILE "\n\tNOTE: This message has been saved in $LOG\n";
	close(LOGFILE);
	system("/bin/cat $LOG");
}

print "\n$scriptname Done. $FILE has been modified to allow 
AFS 3.4 kernel extentions to be dynamically loaded using /sbin/ml.\n\n";