 | | | kermit configuration file | kermit configuration file 2006-04-10 - By Rick Stevens
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On Sat, 2006-04-08 at 09:16 -0700, Bob Kinney wrote:
>
> --- Rick Stevens <rstevens@(protected)> wrote:
>
> > On Mon, 2006-03-13 at 07:51 -0800, Bob Kinney wrote:
> > >
> > >
> > >
> > > > On Sun, 2006-02-19 at 15:46 -0800, Bob Kinney wrote:
> > > > > I've searched high and low for an answer to this; hopefully somebody
> > here
> > > > can
> > > > > help.
> > > > >
> > > > > I'm trying to get kermit to read two commands from a .mykermrc file in
> > my
> > > > home
> > > > > directory:
> > > > >
> > > > > SET LINE /dev/ttyS0
> > > > > SET CARRIER-WATCH OFF
> > > > >
> > > > > I also have an identical .kermrc.
> > > > >
> > > > > For some reason, the SET LINE command does not work.
> > > > >
> > > > > [bob@(protected) ~]$ kermit
> > > > > /var/lock
> > > > > C-Kermit 8.0.209, 17 Mar 2003, for Red Hat Linux 8.0
> > > > > Copyright (C) 1985, 2003,
> > > > > Trustees of Columbia University in the City of New York.
> > > > > Type ? or HELP for help.
> > > > > (/home/bob/) C-Kermit>show file
> > > > >
> > > > > Transfer mode: automatic
> > > > > File patterns: automatic (SHOW PATTERNS for list)
> > > > > File scan: on 49152
> > > > > Default file type: binary
> > > > > File names: converted
> > > > > Send pathnames: off
> > > > > Receive pathnames: auto
> > > > > Match dot files: no
> > > > > Wildcard-expansion: kermit
> > > > > File collision: backup
> > > > > File destination: disk
> > > > > File incomplete: auto
> > > > > File bytesize: 8
> > > > > File character-set: ascii
> > > > > File default 7-bit: ascii
> > > > > File default 8-bit: latin1-iso
> > > > > File UCS bom: on
> > > > > File UCS byte-order: little-endian
> > > > > Computer byteorder: little-endian
> > > > > File end-of-line: lf
> > > > > File eof: length
> > > > > File download-directory: (none)
> > > > > Send move-to: (none)
> > > > > Send rename-to: (none)
> > > > > Receive move-to: (none)
> > > > > Receive rename-to: (none)
> > > > > Initialization file: /home/bob/.kermrc
> > > > > Root set: (none)
> > > > > Disk output buffer: 32768 (writes are buffered, blocking)
> > > > > Stringspace: 500000
> > > > > Listsize: 102400
> > > > > Longest filename: 255
> > > > > Longest pathname: 4096
> > > > > Last file sent: (none)
> > > > > Last file received: (none)
> > > > >
> > > > > Also see:
> > > > > SHOW PROTOCOL, SHOW XFER, SHOW PATTERNS, SHOW STREAMING, SHOW
> > > > CHARACTER-SETS
> > > > > (/home/bob/) C-Kermit>show comm
> > > > >
> > > > > Communications Parameters:
> > > > > Line: /dev/tty, speed: unknown, mode: remote, modem: generic
> > > > > Parity: none, duplex: full, flow: none, handshake: none
> > > > > Carrier-watch: off, close-on-disconnect: off
> > > > > Lockfile directory: /var/lock
> > > > > Typical port device name: /dev/ttyS0
> > > > >
> > > > > Modem signals unavailable
> > > > >
> > > > > Type SHOW DIAL to see DIAL-related items.
> > > > > Type SHOW MODEM to see modem-related items.
> > > > >
> > > > > (/home/bob/) C-Kermit>
> > > > >
> > > > >
> > > > > If I rename .kermrc to hide it, the CARRIER-WATCH line changes to the
> > > > > system default of "auto".
> > > > >
> > > > >
> > > > > Using FC3 on kernel 2.6.12-1.1381_FC3.
> > > > >
> > > > > Anyone have any advice?
> > > >
> > > > First, swap the "SET CARRIER-WATCH OFF" and the "SET LINE /dev/ttyS0"
> > > > lines. You have to turn off carrier watch before swapping to a line
> > > > without carrier.
> > > >
> > >
> > > Thanks for the advice Rick. I tried it, without success. This seems to
> > > be something that broke between RH9 and FC3 distros. I had it working on
> > > RH9, but I did FC3 as a fresh install.
>
>
> Hmmm...here's a clue: When invoking kermit as a non-root user, I get this:
>
> [bob@(protected) ~]$ kermit
> /var/lock
> C-Kermit 8.0.209, 17 Mar 2003, for Red Hat Linux 8.0
> Copyright (C) 1985, 2003,
> Trustees of Columbia University in the City of New York.
> Type ? or HELP for help.
> (/home/bob/) C-Kermit>set line /dev/ttyS0
> /var/lock
> Sorry, write access to UUCP lockfile directory denied.
>
>
> What's /var/lock look like?
>
> [bob@(protected) ~]$ ll -d /var/lock
> drwxrwxr-x 10 root lock 4096 Apr 8 11:01 /var/lock
> [bob@(protected) ~]$ ll /var/lock
> total 64
> drwx-- --- 2 root root 4096 Aug 9 2004 iptraf
> drwx-- --- 2 root root 4096 Sep 27 2005 lvm
> drwxrwsr-x 2 root mailman 4096 Mar 21 2005 mailman
> drwxr-xr-x 2 root root 4096 Apr 8 11:05 mrtg
> drwxr-xr-x 2 rpm rpm 4096 Feb 20 03:22 rpm
> drwxr-xr-x 2 root root 4096 Apr 7 20:22 subsys
> drwxr-xr-x 2 uucp uucp 4096 Oct 14 2004 uucp
> drwxrwxrwt 2 root root 4096 Feb 13 2005 xemacs
> [bob@(protected) ~]$
>
> What would be the security-conscious way to allow non-root users to access
> the serial port? Should I add myself to the "lock" group, or give universal
> write access to /var/lock? A better plan?
Either would work. The more restrictive thing (the least impact on
security) is to add yourself to the lock group. I can't recall if
kermit runs as the invoking user or as a user in and of itself. If it's
the latter, then add the user kermit runs as to the lock group.
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
- Rick Stevens, Senior Systems Engineer rstevens@(protected) -
- VitalStream, Inc. http://www.vitalstream.com -
- -
- When in doubt, mumble. -
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
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