freebsd: setuid core

$ sysctl kern.sugid_coredump=1
kern.sugid_coredump: 0 -> 1
$ sysctl kern.corefile="/var/coredumps/%N/%P.core"
kern.corefile: /var/coredumps/%N/%P.core -> /var/coredumps/%N/%P.core
$ mkdir /var/coredumps/[process name]
$ chown [process owner] /var/coredumps/[process name]

%N = process name
%P = process id

from core

9 ways to count to 10

$ i=1;while [ $i -lt 11 ];do echo $i; i=$(($i+1));done
$ i=1;until [ $i -eq 11 ];do echo $i; i=$(($i+1));done
$ seq 1 10
$ python -c 'for i in xrange(1,11): print i'
$ perl -e 'for $i (1 .. 10){ print "$i\n";}'
$ ruby -e '(1..10).each {|i| print i,"\n"}'
$ ruby -e '1.upto(10) {|i| puts i}'`
$ ruby -e 'for i in 1..10 do print i, "\n" end'
$ lua -e 'for i=1,10 do print(i) end'

the fun continues

/* Convert users input into ascii, hex and decimal. */
I may actually be getting this programming thing down. It started life as a perl script, moved to python, and now its redone in glorious C.

$ cfun 
Usage: cfun [string] [hex] [decimal]
$ cfun syndrowm.com
 ascii: syndrowm.com
 hex: 73 79 6e 64 72 6f 77 6d 2e 63 6f 6d 
 dec: 115 121 110 100 114 111 119 109 46 99 111 109 
 oct: 163 171 156 144 162 157 167 155 56 143 157 155 
$ cfun 0x73796e64726f776d2e636f6d
 ascii: syndrowm.com
 hex: 73 79 6e 64 72 6f 77 6d 2e 63 6f 6d 
 dec: 115 121 110 100 114 111 119 109 46 99 111 109 
 oct: 163 171 156 144 162 157 167 155 56 143 157 155

fedora 7 encrypt a partition

# Encrypt /home
umount /home
$ cryptsetup --verbose --verify-passphrase luksFormat /dev/sda3

WARNING!
========
This will overwrite data on /dev/sda3 irrevocably.

Are you sure? (Type uppercase yes): YES
Enter LUKS passphrase:
Verify passphrase:
Command successful.
$ cryptsetup luksOpen /dev/sda3 /home
$ mkfs.ext3 -j /dev/mapper/home
$ cat /etc/cryptab
home /dev/sda3 none
$ grep home /etc/fstab

#LABEL=/home        /home      ext3    defaults     1 2
/dev/mapper/home    /home      ext3    defaults     1 2

fedora 7 and sucky ATI drivers

******* Resolution issues/ATI driver issues **************

ati-fglrx driver has issues with xorg reporting version 1.6
Can't we all just get along?

1) downgrade xorg here
$ rpm -U --oldversion xorg-x11-server-Xorg-1.2.0-6.fc7.i386.rpm
2) tell yum not to upgrade xorg
$ exclude=xorg-x11-server-Xorg*
3) create xorg.conf
$ aticonfig --initial
4) update /etc/X11/xorg.conf
...................
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1600x1200"
HorizSync 31.5 - 90.0
VertRefresh 60.0 - 60.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[0]"
ModeLine "1920x1200" 154.0 1920 1968 2000 2080 1200 1203 1209 1235 +hsync -vsync
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
Option "IgnoreEDID" "true"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]"
Driver "fglrx"
Option "MonitorLayout" "LVDS,AUTO"
Option "VideoOverlay" "off"
Option "OpenGLOverlay" "on"
Option "mtrr" "off"
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]"
Device "aticonfig-Device[0]"
Monitor "aticonfig-Monitor[0]"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1920x1200" "1680x1050" "1280x1024"
EndSubSection
EndSection

simple python stuff

$ ./maps.py -h
Usage: ./maps.py [-h --help] [-s --specify=arg] [-t --automatic]
Mandatory arguments to long options are mandatory for short options too.
-s --specify=ARGUMENT   print specified argument
-a --automatic          print predefined
-h --help               display this help and exit
$ ./maps.py -a
I like Yahoo maps
$ ./maps.py --automatic
I like Yahoo maps
$ ./maps.py -s amazon
I like amazon maps
$ ./maps.py -s google
Google maps is the BEST!
True that, DOUBLE TRUE!

objdasm.vim

(objdump syntax highlighting)

8049b5a:   f2 ae                   repnz scas %es:(%edi),%l
8049b5c:   89 c8                   mov    %ecx,%eax
8049b5e:   f7 d0                   not    %eax
**8049b60:   48                      dec    %eax       ; two *'s will highlight whatver
8049b61:   83 f8 20                cmp    $0x20,%eax
8049b64:   74 0a                   je     8049b70 <__gmon_start__@plt+0xcd0>
8049b66:   e8 50 fc ff ff          call   80497bb <__gmon_start__@plt+0x91b>
8049b6b:   e9 f3 01 00 00          jmp    8049d63 <__gmon_start__@plt+0xec3>
8049b70:   8b 45 cc                mov    0xffffffcc(%ebp),%eax
8049b73:   40                      inc    %eax
8049b74:   0f b6 00                movzbl (%eax),%eax
8049b77:   0f be c0                movsbl %al,%eax
8049b7a:   89 44 24 08             mov    %eax,0x8(%esp)
8049b7e:   c7 44 24 04 1a a9 04    movl   $0x804a91a,0x4(%esp)

$HOME/.vim/filetype.vim
$HOME/.vim/syntax/objdasm.vim

You will need to name the objdump -D output [something].objd