findExportByName with Frida in libc*.so

Question

I tried to find the address of fopen in libc

But sometimes the libc is libc-2.20.so or libc-2.21.so

So I tried Module.findExportByName("libc*.so", 'fopen');

But that not help, why? is there any solution ?

Answer 1

Module.findExportByName expects a full name of a module, wildcards are not supported.

If you don't know the exact module name you have to get the list of all modules and pick the correct one:

for (let m of Process.enumerateModules()) {
    console.log("Checking module " + m.name);
    if (m.name.match("libc.*\\.so")) {
        let x = Module.findExportByName(m.name, 'fopen');
        ...
    }
}