Using liblsof on Darwin/MacOS, the name field is not populated for regular files

[neek78]

Describe the bug
When running on Darwin/MacOS, lsof_file.name seems to always be NULL for regular files. When running command line lsof, the name field is populated correctly. lsof_file.name seems to be correctly populated on (at least) Linux.

To Reproduce
Steps to reproduce the behavior:

1 Run lsof_gather() against any process with an open regular file.
2. Examine lsof_file.name

Expected behavior
lsof_file.name to be populated

Environment (please complete the following information):

• Kernel: Darwin
• OS: MacOS 26.3
• lsof Version: Current Git Master (63c2646)
• Origin: Built from Git.

Additional context
It seems that void enter_vnode_info() never calls enter_nm() for regular files, as Namech is never populated.

When running in cmdline mode (ie not using liblsof directly), the name is outputted via a cache. I.e. via this mechanism -

#if defined(HASPRIVNMCACHE)
    if (HASPRIVNMCACHE(ctx, Lf)) {
        ps++;
        goto print_nma;
    }
#endif /* defined(HASPRIVNMCACHE) */

The following seems to fix the problem, but I have no idea if it's correct.

--- a/lib/dialects/darwin/dfile.c
+++ b/lib/dialects/darwin/dfile.c
@@ -205,14 +205,12 @@ void enter_vnode_info(
     /*
      * Enter name characters.
      */
+    if(!Namech[0]) {
+        snpf(Namech, Namechl, "%s", Lf->V_path);
+    }
+

[jiegec]

Nice observation! Will try to fix this very soon.

[jiegec]

Hi, I have proposed my fix at #348, maybe you can try this. After fixing it on FreeBSD, it can be merged.

[neek78]

I tried it on darwin - it works great so far, and the tests pass. I'll keep testing, but looks good.. Thanks so much!