RARUN2(1)

NAME
rarun2 - radare2 utility to run programs in exotic environments

SYNOPSIS
rarun2 [[directives]] [[script.rr2]] [[--] [program] [args]]

DESCRIPTION
This program is used as a launcher for running programs with different environment, arguments, permissions, directories and overridden default file descriptors.

rarun2 -t will show the terminal name and wait for a connection from another process. try rarun2 stdio=<ttypath> program=/bin/sh

The program just accepts a single argument which is the filename of the configuration file to run the program.

It is useful when you have to run a program using long arguments or pass long data to stdin or things like that usually are required for exploiting crackmes :)

DIRECTIVES

The rr2 (rarun2) configuration file accepts the following directives, described as key=value entries and comments defined as lines starting with '#'.

arg[0-N]
    set value for argument N passed to the program

aslr
    enable or disable ASLR

bits
    set 32 or 64 bit (if the architecture supports it)

chdir
    change directory before executing the program

chroot
    run the program in chroot. requires some previous setup

clearenv
    unset the whole environment

core
    set no limit the core file size

times
    boolean value (true|false) to print runtime in milliseconds to stderr after program execution

connect
    connect stdin/stdout/stderr to a socket

pty use a pty for connection over socket (with connect/listen)

envfile
    set a file with lines like `var=value` to be used as env

fork
    used with the listen option, allow to spawn a different process for each connection. Ignored when debugging.

input
    set string to be passed to the program via stdin

libpath
    override path where the dynamic loader will look for shared libraries

listen
    bound stdin/stdout/stderr to a listening socket

maxstack
    set the maximum size for the stack

maxproc
    set the maximum number of processes

maxfd
    set the maximum number of file descriptors

nice
    set the niceness level of the process

preload
    preload a library (not supported on Windows, only linux,osx,bsd)

daemon
    Set to false by default, otherwise it will run the program in background, detached from the terminal.

program
    path to program to be executed

execve
    use execve instead of posix_spawn (osx tricks)

runlib
    path to the library to be executed

runlib.fcn
    function name to call from runlib library

r2preload
    preload with libr2, kill -USR1 to get an r2 shell or -USR2 to spawn a webserver in a thread

r2preweb
    run the webserver in a thread just at starting the r2preload

setenv
    set value for given environment variable

setegid
    set effective process group id

seteuid
    set effective process uid

setgid
    set process group id

setuid
    set process uid

sleep
    sleep for the given amount of seconds

stdin
    select file to read data from stdin

stdout
    select file to replace stdout file descriptor

system
    execute the given command

timeout
    set a timeout

timeoutsig
    signal to use when killing the child because the timeout happens

unsetenv
    unset one environment variable

VALUE PREFIXES
Every value in this configuration file can contain a special

@filename
    Slurp contents of file and put them inside the key

text
    Escape characters useful for hex chars

'string'
    Escape characters useful for hex chars

!cmd
    Run command to store the output in the variable

:102030
    Parse hexpair string and store it in the variable

:!cmd
    Parse hexpair string from output of command and store it in the variable

%1234
    Parses the input string and returns it as integer

EXAMPLES
Sample rarun2 script

$ cat foo.rr2 #!/usr/bin/rarun2 program=./pp400 arg0=10 stdin=foo.txt chdir=/tmp clearenv=true setenv=EGG=eggsy setenv=NOFUN=nogames unsetenv=NOFUN # EGG will be the only env variable #chroot=. ./foo.rr2

Connecting a program to a socket

$ nc -l 9999 $ rarun2 program=/bin/ls connect=localhost:9999

Debugging a program redirecting IO to another terminal

## open a new terminal and type 'tty' to get $ tty ; clear ; sleep 999999 /dev/ttyS010 ## in another terminal run r2 $ r2 -r foo.rr2 -d ls $ cat foo.rr2 #!/usr/bin/rarun2 stdio=/dev/ttys010 ## Or you can use -R to set a key=value r2 -R stdio=/dev/ttys010 -d ls

You can also use the -- flag to specify program and arguments in a more natural way:

$ rarun2 timeout=2 -- sleep 4

Run a library function

$ rarun2 runlib=/lib/libc-2.25.so runlib.fcn=system arg1="ls /"

ENVIRONMENT
RARUN2_ARGS useful to just run "rarun2" but parse arguments from environment var

SEE ALSO

radare2(1)

AUTHORS

Written by pancake <pancake@nopcode.org>