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From: Melvyn Sopacua <freebsd.stable@melvyn.homeunix.org>
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Subject: Re: lsof on 6.0
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On Thursday 22 December 2005 16:27, Danny Braniss wrote:

> > > > Do you have a mount which is a symlink?
> > >
> > > no, but many nfs.
> > > minbari> mount
> > > 132.65.16.100:/d/6 on / (nfs)

> Breakpoint 1 at 0x402779: file dmnt.c, line 159.
> (gdb) run
> Starting program:
> /home/pobj/r+d/ports/sysutils/lsof/work/lsof_4.77A.freebsd/ls of
> lsof: WARNING: access /root/.lsof_shuttle-3: No such file or directory
> lsof: WARNING: can't open /root/.lsof_shuttle-3: Read-only file system
>
> Breakpoint 1, dev2udev (c=0xe) at dmnt.c:159
> 159                 if (ln != dn)
> (gdb)  print sr
> $1 = -1
> (gdb)  print ln
> $2 = 0x525140 "132.65.16.100:/d/8"
> (gdb) print dn
> $3 = 0x525140 "132.65.16.100:/d/8"

As I figured, statsafely (which wraps around stat(2)) returns -1 on your nfs 
mount, therefore ss never gets set. I've got no idea what the "user device 
random seed" is needed for, so I suggest you file a pr with the above info.

Additionally, you can try the following patch to see why exactly the stat(2) 
call fails:
--- dmnt.c.orig Mon Oct  3 15:22:52 2005
+++ dmnt.c      Thu Dec 22 16:51:23 2005
@@ -163,6 +163,9 @@
            dn = (char *)NULL;
            if (sr)
                continue;
+           else
+               (void)fprintf(stderr, "%s: cannot stat %s: %s\n", Pn, ln, 
strerror(errno));
+
            ss = 1;
            s = (u_int)sb.st_ino ^ (u_int)sb.st_rdev;
            break;

-- 
Melvyn Sopacua
freebsd.stable@melvyn.homeunix.org

FreeBSD 6.0-STABLE
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