common: Add function gnupg_getcwd.

* tools/gpg-connect-agent.c (gnu_getcwd): Move to ...
* common/sysutils.c (gnupg_getcwd): .. here.
* tools/gpg-connect-agent.c (get_var_ext): Use gnupg_getcwd.

common/sysutils.c

@@ -657,6 +657,36 @@ gnupg_unsetenv (const char *name)
 #endif
 }
 
+
+/* Return the current working directory as a malloced string.  Return
+   NULL and sets ERRNo on error.  */
+char *
+gnupg_getcwd (void)
+{
+  char *buffer;
+  size_t size = 100;
+
+  for (;;)
+    {
+      buffer = xtrymalloc (size+1);
+      if (!buffer)
+        return NULL;
+#ifdef HAVE_W32CE_SYSTEM
+      strcpy (buffer, "/");  /* Always "/".  */
+      return buffer;
+#else
+      if (getcwd (buffer, size) == buffer)
+        return buffer;
+      xfree (buffer);
+      if (errno != ERANGE)
+        return NULL;
+      size *= 2;
+#endif
+    }
+}
+
+
+
 #ifdef HAVE_W32CE_SYSTEM
 /* There is a isatty function declaration in cegcc but it does not
    make sense, thus we redefine it.  */

common/sysutils.h

@@ -63,6 +63,7 @@ int  gnupg_remove (const char *fname);
 int  gnupg_mkdir (const char *name, const char *modestr);
 int  gnupg_setenv (const char *name, const char *value, int overwrite);
 int  gnupg_unsetenv (const char *name);
+char *gnupg_getcwd (void);
 
 #ifdef HAVE_W32_SYSTEM
 void *w32_get_user_sid (void);

tools/gpg-connect-agent.c

@@ -212,30 +212,6 @@ my_strusage( int level )
 }
 
 
-static char *
-gnu_getcwd (void)
-{
-  char *buffer;
-  size_t size = 100;
-
-  for (;;)
-    {
-      buffer = xmalloc (size+1);
-#ifdef HAVE_W32CE_SYSTEM
-      strcpy (buffer, "/");
-      return buffer;
-#else
-      if (getcwd (buffer, size) == buffer)
-        return buffer;
-      xfree (buffer);
-      if (errno != ERANGE)
-        return NULL;
-      size *= 2;
-#endif
-    }
-}
-
-
 /* Unescape STRING and returned the malloced result.  The surrounding
    quotes must already be removed from STRING.  */
 static char *
@@ -568,7 +544,7 @@ get_var_ext (const char *name)
         s++;
       if (!strcmp (s, "cwd"))
         {
-          result = gnu_getcwd ();
+          result = gnupg_getcwd ();
           if (!result)
             log_error ("getcwd failed: %s\n", strerror (errno));
         }