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Radare2 provides a wide set of a features to automate boring work. It ranges from the simple sequencing of the commands to the calling scripts/another programs via IPC (Inter-Process Communication), called r2pipe.
As mentioned a few times before there is an ability to sequence commands using ; semicolon operator.
It simply runs the second command after finishing the first one, like in a shell.
The second important way to sequence the commands is with a simple pipe |
Note, the | pipe only can pipe output of r2 commands to external (shell) commands, like system programs or builtin shell commands. There is a similar way to sequence r2 commands, using the backtick operator `command` . The quoted part will undergo command substitution and the output will be used as an argument of the command line.
For example, we want to see a few bytes of the memory at the address referred to by the 'mov eax, addr' instruction. We can do that without jumping to it, using a sequence of commands:
And of course it's possible to redirect the output of an r2 command into a file, using the > and >> commands
The ?$? command describes several helpful variables you can use to do similar actions even more easily, like the $v "immediate value" variable, or the $m opcode memory reference variable.
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