-char *absolute_path(const char *path) {
-#ifdef HAVE_WINDOWS
- // Works for nonexistent paths
- return _fullpath(NULL, path, 0);
-#else
-
- if(!path || !*path) {
- return NULL;
- }
-
- // If an absolute path was passed, return its copy
- if(*path == '/') {
- return xstrdup(path);
- }
-
- // Try using realpath. If it fails for any reason
- // other than that the file was not found, bail out.
- char *abs = realpath(path, NULL);
-
- if(abs || errno != ENOENT) {
- return abs;
- }
-
- // Since the file does not exist, we're forced to use a fallback.
- // Get current working directory and concatenate it with the argument.
- char cwd[PATH_MAX];
-
- if(!getcwd(cwd, sizeof(cwd))) {
- return NULL;
- }
-
- // Remove trailing slash if present since we'll be adding our own
- size_t cwdlen = strlen(cwd);
-
- if(cwdlen && cwd[cwdlen - 1] == '/') {
- cwd[cwdlen - 1] = '\0';
- }
-
- // We don't do any normalization because it's complicated, and the payoff is small.
- // If user passed something like '.././../foo' — that's their choice; fopen works either way.
- xasprintf(&abs, "%s/%s", cwd, path);
-
- if(strlen(abs) >= PATH_MAX) {
- free(abs);
- abs = NULL;
- }
-
- return abs;
-#endif
-}
-