}
#endif
+/* app_dirname section */
+
+/*
+ * This exactly follows what POSIX's
+ * dirname does, but is implemented
+ * in a more platform independent way.
+ *
+ * path dirname
+ * /usr/lib /usr
+ * /usr/ /
+ * usr .
+ * / /
+ * . .
+ * .. .
+ * "" .
+ *
+ * Note: this function also keeps the
+ * possibility of modifying the 'path'
+ * string same as POSIX dirname.
+ */
+static char *posix_dirname(char *path)
+{
+ size_t l;
+ char *ret = ".";
+
+ l = strlen(path);
+ if (l == 0)
+ goto out;
+ if (strcmp(path, ".") == 0)
+ goto out;
+ if (strcmp(path, "..") == 0)
+ goto out;
+ if (strcmp(path, "/") == 0) {
+ ret = "/";
+ goto out;
+ }
+ if (path[l - 1] == '/') {
+ /* /usr/ */
+ path[l - 1] = '\0';
+ }
+ if ((ret = strrchr(path, '/')) == NULL) {
+ /* usr */
+ ret = ".";
+ } else if (ret == path) {
+ /* /usr */
+ *++ret = '\0';
+ ret = path;
+ } else {
+ /* /usr/lib */
+ *ret = '\0';
+ ret = path;
+ }
+ out:
+ return ret;
+}
+
+/*
+ * TODO: implement app_dirname for Windows
+ * and VMS.
+ */
+#if !defined(_WIN32) && !defined(__VMS)
+char *app_dirname(char *path)
+{
+ return posix_dirname(path);
+}
+#endif
+
/* raw_read|write section */
#if defined(__VMS)
# include "vms_term_sock.h"