[Bug nscd/29402] nscd: No such file or directory

["mingli.yu at windriver dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29402

--- Comment #2 from Mingli <mingli.yu at windriver dot com> ---
And add some debug info as below.
# vi nss/nss_files/files-init.c
[snip]
static void
register_file (void (*cb) (size_t, struct traced_file *), 
               int db, const char *path, int crinit)
{
  size_t pathlen = strlen (path) + 1;
  struct traced_file *file = malloc (sizeof (struct traced_file) + pathlen);
  /* Do not register anything on memory allocation failure.  nscd will
     fail soon anyway.  */
  if (file != NULL)
    {   
      init_traced_file (file, path, crinit);
      syslog (LOG_NOTICE, "in register_file before %s %p", file->fname, file);
      cb (db, file);
      syslog (LOG_NOTICE, "in register_file after %s %p", file->fname, file);
    }
}
[snip]

# vi nscd/connections.c
[snip]
void
register_traced_file (size_t dbidx, struct traced_file *finfo)
{
  /* If the database is disabled or file checking is disabled
     then ignore the registration.  */
  dbg_log("in register_traced_file %s %p", finfo->fname, file);
[snip]


Install the patched nscd and run "systemctl status nscd"
# cat /var/log/syslog
[snip]
2022-08-10T08:28:49.403612+00:00 intel-x86-64 nscd: in  register_file before
/etc/passwd 0x56610fe0
2022-08-10T08:28:49.411267+00:00 intel-x86-64 nscd: in register_traced_file
/passwd 0x56610fe0
2022-08-10T08:28:49.403612+00:00 intel-x86-64 nscd: in  register_file after
/etc/passwd 0x56610fe0
[snip]

It turns out the pointer address is the same as 0x56610fe0 for file both in
function register_file and register_traced_file. But the contents of
file->fname is different. Confusing about the different behavior and I think it
should be same for file->fname. Why it is different? Any hints?

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