在带有符号链接的可执行文件中使用相对路径

Question

I'm trying to figure out how to use my application with a link in ubuntu. I've compiled the code and it contains relative paths to certain files. When I create a link to the executable in a different directory, I can't use these paths. Is there a way (in my code or in the creation of the link) to make it work with the relative paths?

Thanks

Answer 1

Is it realpath you're after? Something like this (source for test in below example):

#include <iostream>
#include <cstdlib>

int main(int argc, char *argv[])
{
        char *path = realpath(argv[0], NULL);
        std::cout << path << '\n';
        free(path);
        return 0;
}

Example execution:

$ ln -s tmp/test
$ ./test
/home/mlil/tmp/test
$

Answer 2

In linux:

ln -sr <source relative path> <destination relative path>

You can verify the symbolic link created in the desination by navigating to that directory and typing the command:

ls -l

The accepted answer is the one that should be used if it is an executable, which is what your question is about. If outside an executable, this is a quick an easy solution.