[syslinux] [MODULE] pwd

[Gene Cumm]

From: Gene Cumm <gene.cumm at gmail.com>

[MODULE] pwd to list present (current) working directory.  If the
returned string is empty, display ".".  If the return value is NULL,
display an error message.

Signed-off-by: Gene Cumm <gene.cumm at gmail.com>

Unfortunately, it appears that COM32 getcwd is not working properly at
this moment, it calling the COMBOOT call and getting an empty string.

---
diff --git a/com32/modules/pwd.c b/com32/modules/pwd.c
new file mode 100644
index 0000000..23421c8
--- /dev/null
+++ b/com32/modules/pwd.c
@@ -0,0 +1,51 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2010 Gene Cumm - All Rights Reserved
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ *   Boston MA 02111-1307, USA; either version 2 of the License, or
+ *   (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Display present (current) working directory
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <console.h>
+#include <unistd.h>
+#include <dirent.h>
+
+/* Size of path buffer string */
+#ifndef PATH_MAX
+#  ifdef NAME_MAX
+#    define PATH_MAX   NAME_MAX
+#  elif FILENAME_MAX
+#    define PATH_MAX   FILENAME_MAX
+#  else
+#    define PATH_MAX   256
+#  endif       /* NAME_MAX */
+#endif /* PATH_MAX */
+
+int main(void)
+{
+    int rv = 0;
+    char pwd[PATH_MAX], *pwdptr;
+
+    openconsole(&dev_rawcon_r, &dev_stdcon_w);
+    pwdptr = getcwd(pwd, PATH_MAX);
+    if (pwdptr) {
+       if (pwd[0] != 0)
+           puts(pwd);
+       else
+           puts(".");
+    } else {
+       rv = errno;
+       puts("ERROR: getcwd() returned NULL");
+    }
+    return rv;
+}