How Can I Get the Execution Directory in a Cross-Platform C/C Program?

How to Determine the Execution Directory in a Cross-Platform Environment

In the realm of programming, determining the execution directory of a program is a crucial yet platform- and filesystem-dependent task. C and C developers often seek a universal solution that transcends these dependencies.

While there may not be a completely platform-agnostic method, here are tailored solutions for Windows and Linux:

Windows:

#include <windows.h>

int main() {
    char pBuf[256];
    size_t len = sizeof(pBuf);
    int bytes = GetModuleFileName(NULL, pBuf, len);
    printf("Execution directory: %s", pBuf);
    return 0;
}

Linux:

#include <unistd.h>
#include <string.h>

int main() {
    char pBuf[256];
    size_t len = sizeof(pBuf);
    int bytes = MIN(readlink("/proc/self/exe", pBuf, len), len - 1);
    if (bytes >= 0)
        pBuf[bytes] = '';
    printf("Execution directory: %s", pBuf);
    return 0;
}

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