$ cat foo.r2p
program=./stack5
stdin=!python stack5_exploit.py

$ python stack5_exploit.py
aaaabaaacaaadaaaeaaafaaagaaahaaaiaaajaaakaaalaaamaaanaaaoaaapaaaqaaaraaasaaataaauaaavaaawaaaxaaayaaa

$ r2 -e dbg.profile=foo.r2p -d -
PID = 26457
p/debug_native.c:410 ptrace_setoptions: No such process
r_debug_native_map_get: No selected pid (-1)
r_debug_select: 26457 26457
p/debug_native.c:1523 debug_init_maps: /proc: No such file or directory
r_io_open_nomap: Unable to open file: -
r_io_open_nomap: Unable to open file: -
p/debug_native.c:410 ptrace_setoptions: No such process
r_debug_reg: error reading registers
r_debug_reg: error reading registers
 -- Move between your search hits in visual mode using the 'f' and 'F' keys
r_debug_reg: error reading registers