CODEWITHSUNDEEP
glibcdynamic-linkingdlopen
sak
sak

Reputation: 3307

Glibc error: invalid mode for dlopen(): Invalid argument

I'm attempting to load a dynamic library at runtime using dlopen. I am calling it like this:

dlopen("/absolute/path/to/libFoo.so", 0);

And this yields the following error:

invalid mode for dlopen(): Invalid argument

This code works perfectly on macOS, but fails on Ubuntu 18.04.4 LTS. What is the meaning of this error, and how can I fix it?

Upvotes: 2

Views: 3248

Answers (1)

Employed Russian
Employed Russian

Reputation: 213877

This code works perfectly on macOS

That doesn't mean it has no bugs.

What is the meaning of this error, and how can I fix it?

From the man page: One of the following two values must be included in flags: RTLD_LAZY, RTLD_NOW.

You didn't include either flag, and that is a bug in your program, which GLIBC is telling you about.

To fix it, replace 0 with either RTLD_LAZY or RTLD_NOW, whichever is appropriate for your program.

Upvotes: 4

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