From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 sys/fio/fdirname.x | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 sys/fio/fdirname.x

(limited to 'sys/fio/fdirname.x')

diff --git a/sys/fio/fdirname.x b/sys/fio/fdirname.x
new file mode 100644
index 00000000..aa24709d
--- /dev/null
+++ b/sys/fio/fdirname.x
@@ -0,0 +1,46 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<ctype.h>
+include	<knet.h>
+
+# FDIRNAME -- Return the concatenatable directory prefix for the named
+# directory.  If no vfn is given (null string), a path to the current
+# directory is returned.
+
+procedure fdirname (vfn, path, maxch)
+
+char	vfn[ARB]		# VFN of directory
+char	path[ARB]		# unpacked path to directory
+int	maxch
+
+int	len1, len2, ch
+int	gstrcpy()
+
+begin
+	if (vfn[1] == EOS) {
+	    # Null vfn; return current directory.
+	    call strcpy ("./", path, maxch)
+	    return
+	}
+
+	# Do we have an OS directory reference?
+	call zfxdir (vfn, path, maxch, len2)
+	ch = path[len2]
+	if (len2 > 0 && !(IS_ALNUM(ch) || ch == '_'))
+	    return
+
+	# Do we have an "ldir$" or "subdir/"?  If so, quit, else if the last
+	# char is a normal identifier class filename char, assume that we have
+	# a VFN and add the / delimiter.  This technique is not infallible,
+	# and a better solution would be to have ZFXDIR or FDIRNAME itself
+	# execute on the remote node.
+
+	len1 = gstrcpy (vfn, path, maxch)
+	ch = path[len1]
+	if (ch == '$' || ch == '/')
+	    return
+
+	# Must be a subdirectory of the form "subdir".  Add the /.
+	path[len1+1] = '/'
+	path[len1+2] = EOS
+end
-- 
cgit