Rating:
# Revving up (798 solves)
> Clam wrote a program for his school's cybersecurity club's first rev lecture!
>
> Can you get it to give you the flag?
>
> You can find it at `/problems/2020/revving_up` on the shell server, which you can access via the "shell" link at the top of the site.
>
> Author: aplet123
```c++
int __cdecl main(int argc, const char argv, const char envp)
{
int result; eax
char v4; [rsp+18h] [rbp-98h]
char s; [rsp+20h] [rbp-90h]
unsigned __int64 v6; [rsp+A8h] [rbp-8h]
v6 = __readfsqword(0x28u);
puts("Congratulations on running the binary!");
puts("Now there are a few more things to tend to.");
puts("Please type give flag (without the quotes).");
fgets(&s, 128, stdin);
v4 = strchr(&s, 10);
if ( v4 )
v4 = 0;
if ( !strcmp(&s, "give flag") )
{
puts("Good job!");
if ( argc 1 )
{
if ( !strcmp(argv[1], "banana") )
{
puts("ell I think it's about time you got the flag!");
print_flag();
result = 0;
}
else
{
printf("You provided %s, not banana. Please try again\n", argv[1]);
result = 1;
}
}
else
{
puts("Now run the program with a command line argument of banana and you'll be done!");
result = 1;
}
}
else
{
printf("You entered %s, not give flag. Please try again\n", &s);
result = 1;
}
return result;
}
```
Solution:
calling binary with "banana" and telling it "give flag" yields flag
```
actf{g3tting_4_h4ng_0f_l1nux_4nd_b4sh}
```
