RZ_RUN(1) General Commands Manual RZ_RUN(1)

rz-run — rizin utility to run programs in custom environments

rz-run [[directives]] [[script.rz]] [[--] [program] [args]]

This command is part of the Rizin project.

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

List all the supported profile options.
Output a base template profile. Try rz-run -d > profile.rz
Show the terminal name and wait for a connection from another process. Try rz-run 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 required for exploiting crackmes :)

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

arg[0-511]
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
core
Set no limit the core file size
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
pid
Set to true to print the PID of the process to stderr
pidfile
Print the PID of the process to the specified file
runlib
Path to the library to be executed
runlib.fcn
Function name to call from runlib library
rzpreload
Preload with librz, kill -USR1 to get an rizin shell or -USRZ to spawn a webserver in a thread
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
stdio=value
Set io streams (stdin, stdout, stderr) to a value
stdio=!cmd
Redirect input/output to the process created by the specified command
stdin
Set stdin, stdout, and stderr streams to the specified value
stdout
Select file to replace stdout file descriptor
stderr
Select file to replace stderr 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

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

Sample rz-run script


$ cat foo.rrz
#!/usr/bin/rz-run
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.rrz

Connecting a program to a socket

nc -l 9999

rz-run 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 rizin
$ rizin -r foo.rrz -d ls
$ cat foo.rrz
#!/usr/bin/rz-run
stdio=/dev/ttys010
## Or you can use -R to set a key=value
rizin -R stdio=/dev/ttys010 -d ls

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

rz-run timeout=2 -- sleep 4

Run a library function

rz-run runlib=/lib/libc-2.25.so runlib.fcn=system arg1="ls /"

rizin(1), rz-hash(1), rz-find(1), rz-bin(1), rz-diff(1), rz-gg(1), rz-asm(1),

pancake <pancake@nopcode.org>

byteninjaa0

January 24, 2024