+ exepath = path;
+#endif
+
+#elif defined(HAVE_REALPATH) /* Assume POSIX.1-2008 */
+ /* Try Unices in order of likelihood. */
+ exepath = realpath("/proc/self/exe", NULL); /* Linux/Cygwin */
+ if (exepath == NULL)
+ exepath = realpath("/proc/self/path/a.out", NULL); /* Solaris */
+ if (exepath == NULL)
+ exepath = realpath("/proc/curproc/file", NULL); /* FreeBSD (Should be covered above) */
+#endif
+ } while (0);
+
+ if (exepath != NULL) {
+ /* Strip executable file name, leaving path */
+ *strrchr(exepath, '/') = '\0';
+ } else {
+ LOG_WARNING("Could not determine executable path, using configured BINDIR.");
+ LOG_DEBUG("BINDIR = %s", BINDIR);
+#ifdef HAVE_REALPATH
+ exepath = realpath(BINDIR, NULL);
+#else
+ exepath = strdup(BINDIR);
+#endif
+ }
+
+ return exepath;
+}
+
+static char *find_relative_path(const char *from, const char *to)
+{
+ size_t i;
+
+ /* Skip common /-separated parts of from and to */
+ i = 0;
+ for (size_t n = 0; from[n] == to[n]; n++) {
+ if (from[n] == '\0') {
+ i = n;
+ break;
+ }
+ if (from[n] == '/')
+ i = n + 1;
+ }
+ from += i;
+ to += i;
+
+ /* Count number of /-separated non-empty parts of from */
+ i = 0;
+ while (from[0] != '\0') {
+ if (from[0] != '/')
+ i++;
+ char *next = strchr(from, '/');
+ if (next == NULL)
+ break;
+ from = next + 1;
+ }
+
+ /* Prepend that number of ../ in front of to */
+ char *relpath = malloc(i * 3 + strlen(to) + 1);
+ relpath[0] = '\0';
+ for (size_t n = 0; n < i; n++)
+ strcat(relpath, "../");
+ strcat(relpath, to);
+
+ return relpath;
+}
+
+static void add_default_dirs(void)
+{
+ char *path;
+ char *exepath = find_exe_path();
+ char *bin2data = find_relative_path(BINDIR, PKGDATADIR);
+
+ LOG_DEBUG("bindir=%s", BINDIR);
+ LOG_DEBUG("pkgdatadir=%s", PKGDATADIR);
+ LOG_DEBUG("exepath=%s", exepath);
+ LOG_DEBUG("bin2data=%s", bin2data);
+