10-04-2005
sendmail -q hangs
Hi,
I have a system where sendmail deamon not running.
(And I have lot of jobs under crontab).
But I have whole lot of sendmail processes started-up by cron process, eating up its CPU resources. (for a sample - see below)
$ ps -ef|grep 248
root 248 1 0 Aug 12 ? 0:56 /usr/sbin/cron
root 11861 248 0 Sep 26 ? 0:00 sh -c if [ -x /usr/lib/sendmail ]; then /usr/lib/sendmail -q; fi
root 7328 248 0 Oct 02 ? 0:00 sh -c if [ -x /usr/lib/sendmail ]; then /usr/lib/sendmail -q; fi
root 14735 248 0 Sep 26 ? 0:00 sh -c if [ -x /usr/lib/sendmail ]; then /usr/lib/sendmail -q; fi
root 25825 248 0 Oct 03 ? 0:00 sh -c if [ -x /usr/lib/sendmail ]; then /usr/lib/sendmail -q; fi
root 16386 248 0 Sep 30 ? 0:00 sh -c if [ -x /usr/lib/sendmail ]; then /usr/lib/sendmail -q; fi
When I tried to startup the deamon as used in the cron executable like:
"/usr/lib/sendmail -q" I get errors: (see below)
# /usr/lib/sendmail -q
hash map "Alias0": missing map file /etc/aliases.db: No such file or directory
dbm map "Alias0": missing map file /etc/aliases
Operating system error
Operating system error
But If I run the command like this: "/usr/lib/sendmail -q15m", then it works fine.
1. How to get rid of following type of processes:
"root 14735 248 0 Sep 26 ? 0:00 sh -c if [ -x /usr/lib/sendmail ]; then /usr/lib/sendmail -q; fi"
My system details:
$ uname -i
SUNW,Ultra-60
$ uname -a
SunOS stib2 5.8 Generic_117350-26 sun4u sparc SUNW,Ultra-60s:
Thanks in advance.
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SMRSH(8) System Manager's Manual SMRSH(8)
NAME
smrsh - restricted shell for sendmail
SYNOPSIS
smrsh -c command
DESCRIPTION
The smrsh program is intended as a replacement for sh for use in the ``prog'' mailer in sendmail(8) configuration files. It sharply limits
the commands that can be run using the ``|program'' syntax of sendmail in order to improve the over all security of your system. Briefly,
even if a ``bad guy'' can get sendmail to run a program without going through an alias or forward file, smrsh limits the set of programs
that he or she can execute.
Briefly, smrsh limits programs to be in a single directory, by default /usr/lib/sendmail.d/bin/ allowing the system administrator to choose
the set of acceptable commands, and to the shell builtin commands ``exec'', ``exit'', and ``echo''. It also rejects any commands with the
characters ``', `<', `>', `;', `$', `(', `)', `
' (carriage return), or `
' (newline) on the command line to prevent ``end run'' attacks.
It allows ``||'' and ``&&'' to enable commands like: ``"|exec /usr/local/bin/filter || exit 75"''
Initial pathnames on programs are stripped, so forwarding to ``/usr/bin/vacation'', ``/usr/bin/vacation'', ``/home/server/mydir/bin/vaca-
tion'', and ``vacation'' all actually forward to `/usr/lib/sendmail.d/bin/vacation''.
System administrators should be conservative about populating the /usr/lib/sendmail.d/bin/ directory. For example, a reasonable additions
is vacation(1), and the like. No matter how brow-beaten you may be, never include any shell or shell-like program (such as perl(1)) in the
/usr/lib/sendmail.d/bin/ directory. Note that this does not restrict the use of shell or perl scripts in the /usr/lib/sendmail.d/bin/
directory (using the ``#!'' syntax); it simply disallows execution of arbitrary programs. Also, including mail filtering programs such as
procmail(1) is a very bad idea. procmail(1) allows users to run arbitrary programs in their procmailrc(5).
COMPILATION
Compilation should be trivial on most systems. You may need to use -DSMRSH_PATH="path" to adjust the default search path (defaults to
``/bin:/usr/bin'') and/or -DSMRSH_CMDDIR="dir" to change the default program directory (defaults to ``/usr/lib/sendmail.d/bin/'').
FILES
/usr/lib/sendmail.d/bin/ - default directory for restricted programs on SuSE Linux
SEE ALSO
sendmail(8)
$Date: 2004/08/06 03:55:35 $ SMRSH(8)