Commands tagged Programming sorted by votes

Commands tagged Programming (12)

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Get all shellcode on binary file from objdump

Tired copy paste to get opcode from objdump huh ? Get more @ http://gunslingerc0de.wordpress.com Show Sample Output

This is sample output - yours may be different.

gunslinger@localhost:~/$ objdump -d shell

shell:     file format elf32-i386


Disassembly of section .text:

08048060 <.text>:
 8048060:	31 c0                	xor    %eax,%eax
 8048062:	31 db                	xor    %ebx,%ebx
 8048064:	31 c9                	xor    %ecx,%ecx
 8048066:	31 d2                	xor    %edx,%edx
 8048068:	b0 46                	mov    $0x46,%al
 804806a:	31 db                	xor    %ebx,%ebx
 804806c:	31 c9                	xor    %ecx,%ecx
 804806e:	cd 80                	int    $0x80
 8048070:	b0 0b                	mov    $0xb,%al
 8048072:	53                   	push   %ebx
 8048073:	68 2f 2f 73 68       	push   $0x68732f2f
 8048078:	68 2f 62 69 6e       	push   $0x6e69622f
 804807d:	89 e3                	mov    %esp,%ebx
 804807f:	31 c9                	xor    %ecx,%ecx
 8048081:	31 c9                	xor    %ecx,%ecx
 8048083:	53                   	push   %ebx
 8048084:	cd 80                	int    $0x80
gunslinger@localhost:~/$ objdump -d ./shell|grep '[0-9a-f]:'|grep -v 'file'|cut -f2 -d:|cut -f1-6 -d' '|tr -s ' '|tr '\t' ' '|sed 's/ $//g'|sed 's/ /\\x/g'|paste -d '' -s |sed 's/^/"/'|sed 's/$/"/g'
"\x31\xc0\x31\xdb\x31\xc9\x31\xd2\xb0\x46\x31\xdb\x31\xc9\xcd\x80\xb0\x0b\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x31\xc9\x31\xc9\xcd\x80\x31\xc0\xb0\x0b\x31\xdb\xcd\x80"
gunslinger@localhost:~/$

-------------------------------shellcodetest.c---------------------------------
char shellcode[] = "\x31\xc0\x31\xdb\x31\xc9\x31\xd2\xb0\x46\x31\xdb\x31"
		   "\xc9\xcd\x80\xb0\x0b\x53\x68\x2f\x2f\x73\x68\x68\x2f"
		   "\x62\x69\x6e\x89\xe3\x31\xc9\x31\xc9\x53\xcd\x80";

int main(void)
{
	(*(void(*)()) shellcode)();
}
------------------------------------EOF----------------------------------------

root@localhost:/home/gunslinger/# vim shellcodetest.c
root@localhost:/home/gunslinger/# cat shellcodetest.c
char shellcode[] = "\x31\xc0\x31\xdb\x31\xc9\x31\xd2\xb0\x46\x31\xdb\x31"
		   "\xc9\xcd\x80\xb0\x0b\x53\x68\x2f\x2f\x73\x68\x68\x2f"
		   "\x62\x69\x6e\x89\xe3\x31\xc9\x31\xc9\x53\xcd\x80";

int main(void)
{
	(*(void(*)()) shellcode)();
}
root@localhost:/home/gunslinger/# gcc -o shellcodetest shellcodetest.c
root@localhost:/home/gunslinger/# chown root:root shellcodetest.c
root@localhost:/home/gunslinger/# chmod 4755 shellcodetest
root@localhost:/home/gunslinger/# exit
gunslinger@localhost:~/$ ./shellcodetest
# id
uid=0(root) gid=1000(gunslinger) groups=4(adm),20(dialout),24(cdrom),46(plugdev),106(lpadmin),121(admin),122(sambashare),1000(gunslinger)
# whoami
root
# echo GAMEOVER
GAMEOVER
# exit
gunslinger@localhost:~/$

gunslinger_ · 2010-07-11 15:44:48 112

Indent all the files in a project using emacs

use -iname \*[.ch] instead of -iname \*.c -o -iname \*.h
This is sample output - yours may be different.
3

find -iname \*.[ch] -exec emacs -nw -q {} --eval "(progn (mark-whole-buffer) (indent-region (point-min) (point-max) nil) (save-buffer))" --kill \;

ioggstream · 2010-09-10 12:24:58 3
List symbols from a dynamic library (.so file)

You can get what functions at which addresses are inside a dynamic link library by this tool.
This is sample output - yours may be different.
2

nm --dynamic <libfile.so>

Vereb · 2009-09-13 09:27:57 11
Get all shellcode on binary file from objdump

Better than the others, and actually works unlike some of them. Show Sample Output
This is sample output - yours may be different.
```
\x31\xc0\x48\xbb\xd1\x9d\x96\x91\xd0\x8c\x97\xff\x48\xf7\xdb\x53\x54\x5f\x99\x52\x57\x54\x5e\xb0\x3b\x0f\x05
```
1

objdump -d $1 | grep -Po '\s\K[a-f0-9]{2}(?=\s)' | sed 's/^/\\x/g' | perl -pe 's/\r?\n//' | sed 's/$/\n/'

Daytona · 2015-05-23 01:21:58 10
Indent all the files in a project using emacs

indenting all the files at a time, if the file has local variable for indentation style its even better. This one liner is not pretty but it does the job.
This is sample output - yours may be different.
0

lst=`find . -iname \*.c -or -iname \*.h`; for i in $lst; do emacs -nw -q $i --eval "(mark-whole-buffer)" --eval "(indent-region (point-min) (point-max) nil)" --eval "(save-buffer)" --kill; done

JollyJumper · 2010-09-09 22:02:54 3
Indent all the files in a project using emacs

Use find's exec and reduce the need for multiple evals with a progn wrapper.
This is sample output - yours may be different.
0

find . -iname \*.c -or -iname \*.h -exec emacs -nw -q {} --eval "(progn (mark-whole-buffer) (indent-region (point-min) (point-max) nil) (save-buffer))" --kill \;

zev · 2010-09-10 05:07:11 3
Find .java files with high complexity (counting curly braces)
This is sample output - yours may be different.
0

find src/ -name "*.java" | while read f; do echo -n "$f "; cat "$f" | tr -dc '{}'; echo; done | awk '{ print length($2), $1 }' | sort -n

mindsocket · 2011-07-21 01:25:31 8
Command to get list of all existing programming languages from Wikipedia article

Requirements: curl, grep, awk, internet connection with access to wikipedia Loaded page: http://en.wikipedia.org/wiki/List_of_programming_languages If you can make shorter version of this listgetter, you are welcome to paste it here :) Show Sample Output
This is sample output - yours may be different.
```
R (programming language)
R++
Racket (programming language)
RAPID
Rapira
Ratfiv
Ratfor
Rc
REBOL
Core War
REFAL
Reia (programming language)
Revolution (programming language)
Rex (language)
REXX
Rlab
ROOP (programming language)
IBM RPG
RPL (programming language)
Robot Battle
RTL/2
Ruby (programming language)
Rust (programming language)
```
0

curl http://en.wikipedia.org/wiki/List_of_programming_languages | grep "<li>" | awk -F"title=" '{ print $2 }' | awk -F\" '{ print $2 }'

sxiii · 2013-01-09 21:40:11 11
Quickly write and run a C program.
This is sample output - yours may be different.
0

vim test.c && gcc -x c -o a.out test.c && ./a.out && rm a.out test.c

ari2015 · 2013-09-08 15:09:09 6
Get all shellcode on binary file from objdump
This is sample output - yours may be different.
0

echo "\"$(objdump -d BINARY | grep '[0-9a-f]:' | cut -d$'\t' -f2 | grep -v 'file' | tr -d " \n" | sed 's/../\\x&/g')\""

reiderroque · 2015-09-25 20:21:26 11
Calculate comment density of shell scripts in a directory

Show Sample Output
This is sample output - yours may be different.
```
7882 lines = 7576 sloc [96%] + 306 comments [3%]
```
0

dir=/rom; a=$(find $dir -name \*.sh -exec cat '{}' \; | egrep -cv '^[[:space:]]*#'); b=$(find $dir -name \*.sh -exec cat '{}' \; | egrep -c '^[[:space:]]*#'); echo $((a+b)) lines = ${a} sloc [$((a*100/(a+b)))%] + ${b} comments [$((b*100/(a+b)))%]

koniu · 2016-05-19 08:35:56 86
Indent all the files in a project using indent

This version uses the indent C formatting utility. Doesn't appear to be included with ubuntu. But CentOS and MacOS have it.
This is sample output - yours may be different.
-1

find . -iname \*.[ch] -exec indent "{}" \;

putnamhill · 2010-09-10 13:25:10 4

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Query ip pools based on successive netnames via whois

Useful if you f.i. want to block/allow all connections from a certain provider which uses successive netnames for his ip blocks. In this example I used the german Deutsche Telekom which has DTAG-DIAL followed by a number as netname for the dial in pools. There are - as always ;) - different ways to do this. If you have seq available you can use $ net=DTAG-DIAL ; for i in `seq 1 30`; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done or without seq you can use bash brace expansion $ net=DTAG-DIAL ; for i in {1..30}; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done or if you like while better than for use something like $ net=DTAG-DIAL ; i=1 ; while true ; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; test $i = 30 && break ; i=$(expr $i + 1) ; done and so on.

Calculate files' size

Command to logout all the users in one command

Logs all users out except root. I changed the grep to use a regexp in case a user's username contained the word root.

Recursively compare two directories and output their differences on a readable format

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Simplest port scanner

Very handy way to perform a host scan if you don't have nmap,ncat,nc ...or other tools installed locally. When executing a command on a /dev/tcp/$host/$port pseudo-device file, Bash opens a TCP connection to the associated socket and UDP connection when using /dev/udp/$host/$port.A simlpe way to get servers banner is to run this command "cat < /dev/tcp/localhost/25" , here you will get mail server's banner. NOTE: Bash, as packaged for Debian, does not support using the /dev/tcp and /dev/udp pseudo-device it's not enabled by default Because bash in Debian is compiled with ?disable-net-redirections.

Regenerate the /etc/mtab file

Prepend a text to a file.

Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.

wrap long lines of a text

wraps text lines at the specified width (90 here). -s option is to force to wrap on blank characters -b count bytes instead of columns

return a titlecased version of the string[str.title() in python]

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Commands tagged Programming (12)

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