From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id AECF8385801A; Wed, 10 Aug 2022 03:00:09 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AECF8385801A
From: "mingli.yu at windriver dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nscd/29402] nscd: No such file or directory
Date: Wed, 10 Aug 2022 03:00:09 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: nscd
X-Bugzilla-Version: 2.35
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mingli.yu at windriver dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-29402-131-xQWxDZCX3a@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-29402-131@http.sourceware.org/bugzilla/>
References: <bug-29402-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: glibc-bugs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Glibc-bugs mailing list <glibc-bugs.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/glibc-bugs/>
List-Help: <mailto:glibc-bugs-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Wed, 10 Aug 2022 03:00:09 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D29402

--- 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 *),=20
               int db, const char *path, int crinit)
{
  size_t pathlen =3D strlen (path) + 1;
  struct traced_file *file =3D malloc (sizeof (struct traced_file) + pathle=
n);
  /* Do not register anything on memory allocation failure.  nscd will
     fail soon anyway.  */
  if (file !=3D NULL)
    {=20=20=20
      init_traced_file (file, path, crinit);
      syslog (LOG_NOTICE, "in register_file before %s %p", file->fname, fil=
e);
      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 thin=
k it
should be same for file->fname. Why it is different? Any hints?

--=20
You are receiving this mail because:
You are on the CC list for the bug.=