The utility qsstv is an open-source slow scan television program. Slow scan television was allowed for use by radio amateurs in 1968, and was utilized as a part of the Apollo lunar missions.Ī sample SSTV signal is provided on Wikipedia: This is a method for transmitting images, pioneered by ham radio operators, for transmitting images using narrow bandwidth (3 kHz), an order of magnitude smaller than the bandwidth required to send moving television images (6 MHz). My first experience using qsstv was part of the Defcon Darknet CTF game, where one of the challenges involved slow scan TV images and several related challenges.įirst, let's talk about slow scan TV. Qsstv is a utility for dealing with slow scan television signals. 2.1.3.2 hook up output monitor to qsstv input:.Reading symbols from /bin/ls.(no debugging symbols found).done. Gef loaded, `gef help' to start, `gef config' to configureģ7 commands loaded (15 sub-commands), using Python engine 3.5 You should see the following header and prompt $ gdb -q /bin/ls To check that GEF has been correctly installed, simply start a new gdb Otherwise, it willĪutomatically disable all the gef commands that require this invalid module. Gef will assume the module installations are valid. Have problems while installing those modules.

Gef works out of the box, please do not send issues to this project if you Please refer to each project for installation and troubleshooting guides. Some of those modules can be installed through python-pip. Ropper - an improved version of ROPgadget.Highly recommended to install the following modules (but not required): (gdb) pi import urllib.request as u, tempfile as t g=t.NamedTemporaryFile(suffix='-gef.py') open(g.name, 'wb+').write(u.urlopen('').read()) gdb.execute('source %s' % g.name)Ī few commands were added to GEF to extend its capabilities. $ echo source ~/.gdbinit-gef.py > ~/.gdbinitĪlternatively from inside gdb directly: $ gdb -q One-time setup script # via the install script The latest, though you're more likely to encounter a bug. $ echo 'source /path/to/gef.py' > ~/.gdbinit Then sourcing the file from your ~/.gdbinit. The best way to use GEF is by cloning the git repository from GitHub, and

If you see an error here, it means that your GDB installation does not support Python. $ gdb -nx -ex 'pi print(sys.version)' -ex quit This should display your version of Python compiled with gdb. You can verify it with the following command: $ gdb -nx -ex 'pi print(sys.version)' -ex quit Gef-legacy won't provide new features, and only functional If you absolutely require GDB + Python 2, For most people, simply using yourĭistribution package manager should be enough.Īs of January 2020, GEF officially doesn't support Python 2 any longer, due to It must beĬompiled with Python 3.6 or higher support. There is NO mandatory dependency to have gef running contrarily to other projects.Ī simple recent GDB compiled with Python scripting support will do.

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