We should figure out what behavior we want. In Linux 2.2, it is impossible
to create a symlink with empty contents (symlink returns ENOENT). In
FreeBSD 4.1, you can create a symlink to empty--and it acts like a symlink
to /. What I would have expected was that it act like a symlink to ., but
it is easy to see how an implementation could wind up acting like FreeBSD
appears to.
That said, I hacked this patch, which might work. The intent of this patch
is to make a symlink to empty behave like a symlink to ., but I have not
even tried to compile this.
Index: dir-lookup.c
===================================================================
RCS file: /cvs/hurd/libdiskfs/dir-lookup.c,v
retrieving revision 1.44
diff -u -b -p -r1.44 dir-lookup.c
--- dir-lookup.c 2000/03/17 10:36:19 1.44
+++ dir-lookup.c 2000/12/03 22:22:03
@@ -333,6 +333,12 @@ diskfs_S_dir_lookup (struct protid *dirc
if (error)
goto out;
+ if (np->dn_stat.st_size == 0)
+ /* We don't want to prepend a leading slash to NEXTNAME,
+ we just want to continue with it as it is. */
+ path = nextname;
+ else
+ {
if (nextname)
{
pathbuf[np->dn_stat.st_size] =
pathbuf[np->'/';
@@ -351,6 +357,7 @@ diskfs_S_dir_lookup (struct protid *dirc
}
path = pathbuf;
+ }
if (lastcomp)
{
lastcomp = 0;
@@ -378,6 +385,14 @@ diskfs_S_dir_lookup (struct protid *dirc
dnp = 0;
}
} while (path && *path);
+
+ if (np == 0)
+ {
+ assert (!newnode);
+ assert (dnp != 0);
+ np = dnp;
+ dnp = 0;
+ }
/* At this point, np is the node to return. If newnode is set, then
we just created this node. */
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