Radare2: Running executable from a specific point

Question

I am using radare2 to reverse engineer a standard crackme executable. I have obtained the password, but now I need use the program to read & print a restricted file to which the executable has access.

I can see from the executable's main function through radare2 that there is a "login" section that asks for a password and this then proceeds to execute a system command that prints the restricted file.

However, it seems the program flow skips past this section and terminates the program.

Given an address or a string reference, how can I use radare2 to execute the program from a certain point so that I can avoid skipping it?

From this:

entry point 0x00000
|
|  desired section 0x000c8 "enter password: "
v
termination 0x000f9 "no entry"

To this:

entry point
|
|_-> desired section 0x000c8 "enter password: " -> 0x000ca "cat /root/file.txt" -
                                                                                 |
termination 0x000f9 <-___________________________________________________________|