Re: .forward ignored

[Nikolaos Milas]

On 13/10/2011 6:40 μμ, Wietse Venema wrote:

A few messages ago, I asked this:

To find out what system call is failing, see the strace instructions
in http://www.postfix.org/DEBUG_README.html, and compare strace results.

Hi Wietse,



Sorry for the noise...





I added in /etc/postfix/main.cf:
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
(strace -p $process_id 2>&1 | logger -p mail.info) & sleep 5

and then in /etc/postfix/master.cf:
local unix - n n - - local -D





So, I tried running manually in the background:

# strace -f -p12843 -odebug2 &







But what did I do wrong and strace was not done "automatically"?

Thanks,
Nick

First, I found the cause: It was selinux (once more...). Although I thought it was disabled, in fact it wasn't. (And I was SO SURE I had checked; it's embarrassing.) But, I would like to have a clarification on what I do wrong with the debugging: I believed I followed in detail the directions (as described in that doc, "Automatically tracing a Postfix daemon process"): I expected "local" to be automatically strace'd but I didn't see anything in the logs except: Oct 13 19:33:42 vpnspot postfix/local[12852]: running: PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin (strace -p 12852 2>&1 | logger -p mail.info) & sleep 5 where 12843 was the "master" postfix process (at that point). (AFAIK local process is created on the fly and we don't know its process-id beforehand to run strace on it.) Then I retried sending a local mail to root. The following indication in strace output guided me to re-investigate selinux settings... 12952 lstat("/root/.forward", 0x7fffbbb16660) = -1 EACCES (Permission denied)

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