There are many ways to approach this, each with their own pros and cons: require.main.filename From http://nodejs.org/api/modules.html: When a file is run directly from Node, require.main is set to its module. That means that you can determine whether a file has been run directly by testing require.main === module Because module provides a filename property … Read more
There is no reliable way to do this in pure Java. Setting the user.dir property via System.setProperty() or java -Duser.dir=… does seem to affect subsequent creations of Files, but not e.g. FileOutputStreams. The File(String parent, String child) constructor can help if you build up your directory path separately from your file path, allowing easier swapping. … Read more
Here’s code to get the full path to the executing app: Windows: char pBuf[256]; size_t len = sizeof(pBuf); int bytes = GetModuleFileName(NULL, pBuf, len); return bytes ? bytes : -1; Linux: int bytes = MIN(readlink(“/proc/self/exe”, pBuf, len), len – 1); if(bytes >= 0) pBuf[bytes] = ‘\0’; return bytes;