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|
#!@PERL@
#
# $Id$
#
eval "exec @PERL@ -S $0 $*"
if $running_under_some_shell;
# dump shared memory segment tony@divnc.com
require 'sys/shm.ph';
require 'getopts.pl';
&Getopts("vhi:k:f:l:b:w"); # verbose, help, id, key, first, length, word, base
if ($opt_h || ($opt_i && $opt_k))
{
print STDERR <<NO_MORE_HELP;
shmdump
Dump contents of specifed shared memory segment.
Usage: $0 [options]
-h -- help
-v -- possibly more verbose
-i shmid -- shm id
-k shmkey -- shm key
-f first -- start of partial dump
-l length -- length of partial dump
-w -- dump as 4byte words instead of bytes
-b base -- use 'base' as base address for output
anything else == this help message
NO_MORE_HELP
exit 1;
}
$verbose = $opt_v;
$id = $opt_i;
$key = $opt_k;
$offset = $opt_f;
$print_length = $opt_l;
$base = $opt_b;
$word_dump = $opt_w;
if ($key)
{
# ensure key is an integer
$key = oct($key) if $key =~ /^0/;
die "Could not convert key to id; $!" unless $id = shmget($key, 1, 0);
}
# ensure integerhood in case of leading '0x'
$base = oct($base) if $base =~ /^0/;
$offset = oct($offset) if $offset =~ /^0/;
$print_length = oct($print_length) if $print_length =~ /^0/;
if ( ! shmctl($id, &IPC_STAT, $shmid_ds))
{
die "shmctl(2) for id $id failed -- (I was trying to get size): $!";
}
# Pick the length out.
# It is at byte offset 0x30 on hpux9 and probably hpux10
# Also get the key if we don't have it already. Don't need it tho...
$length = unpack("I", substr($shmid_ds, 0x30, 4));
$key = unpack("I", substr($shmid_ds, 0x14, 4)) if ! $key;
# poke around looking for length and key
# print "I guess: length: $length, key: $key\n";
# print "****$shmid_ds****\n"; die "";
# make sure offset and print length make sense
$print_length = $length if ! $print_length;
if (($offset + $print_length) > $length)
{
die "offset ($offset) and length ($print_length) go beyond end of segment ($length bytes)";
}
printf("KEY: 0x%X (%d) ", $key, $key) if ($key);
printf "ID: $id\n";
printf " %d bytes (0x%X), %d words, logical base is 0x%X\n",
$length, $length, $length / 4, $base;
if ($offset || ($print_length != $length))
{
printf " printing %X (%d) bytes starting at offset 0x%X (%d)\n",
$print_length, $print_length, $offset, $offset;
}
printf "\n";
if ( ! shmread($id, $shm_data, $offset, $print_length))
{
die "could not attach and read from shmid $id: $!";
}
# the dump code below derived from "Real Perl Programs" example "xdump"
# from Camel book
$base += $offset;
$offset = 0;
for ($len = $print_length; $len >= 16; )
{
$data = substr($shm_data, $offset, 16);
@array = unpack('N4', $data);
$data =~ tr/\0-\37\177-\377/./;
printf "%8.8lX %8.8lX %8.8lX %8.8lX %8.8lX |%s|\n",
$base, @array, $data;
$offset += 16;
$base += 16;
$len -= 16;
}
# Now finish up the end a byte at a time
if ($len)
{
$data = substr($shm_data, $offset, $len);
@array = unpack('C*', $data);
for (@array)
{
$_ = sprintf('%2.2X', $_);
}
push(@array, ' ') while $len++ < 16;
$data =~ tr/\0-\37\177-\377/./;
$data =~ s/[^ -~]/./g;
printf "%8.8lX ", $base;
printf "%s%s%s%s %s%s%s%s %s%s%s%s %s%s%s%s |%-16s|\n",
@array, $data;
}
|
