On Tue, Mar 20, 2001 at 12:36:13PM -0500, Peter Green wrote:
[snip]
> #!/bin/bash2
>
> # check vmailmgr first; save the environment
> # /tmp/scr just executes /usr/bin/id
> ENVIRON = $(/usr/bin/checkvpw /tmp/scr Maildir/)
> rc=$?
> if [ $rc -ne 0 ]; then
> # failed; try vpopmail
> ENVIRON = $(/usr/local/vpopmail/bin/vchkpw /tmp/scr Maildir/)
> rc=$?
> if [ $rc -ne 0 ]; then
> # failed all
> echo "-ERR Authorization failed"
> exit $rc
> else
> export $ENVIRON
> exec qmail-pop3d "$@"
> fi
> else
> export $ENVIRON
> exec qmail-pop3d "$MAILDIR"
> fi
>
> It mostly works, since all child processes inherit FD 3 properly. However,
> if the first method fails, it cannot try the second method, since FD 3 has
> already hit EOF; how can I rewind this from bash? Also, if it succeeds, the
> exec line simply does not work; the error is always ``-ERR this user has no
> $HOME/Maildir''. I have double-checked the environment with
> ``env>>/tmp/debug'' after the export call, and home get set properly.
[snip]
You can rewind by saving FD3 to an ordinary file. Try this example:
#! /bin/sh
exec 0<&3
cat>/tmp/pwd
exec 3</tmp/pwd
checkpassword qmail-pop3d Maildir
exec 3</tmp/pwd
checkpassword qmail-pop3d Maildir
I don't know if you mind the file /tmp/pwd or if it is possible to get
rid of it at all but pop is insecure anyway -- don't forget to create a
unique file instead (and to remove it after the session).
I had the same problem with $HOME/Maildir when I started qmail-pop3d by
itself...
This example isn't all good since qmail-pop3d terminates directly :)
Jörgen
