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114 lines
4.3 KiB
Bash
Executable file
114 lines
4.3 KiB
Bash
Executable file
#!/bin/bash
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#
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# Copyright (C) 2008 Massimo Del Fedele <max@veneto.com>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 2 of the License, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# Based on previous works of following authors :
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#
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# Copyright (C) 2001-2002 Sebastiano Vigna <vigna@acm.org>
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# Modified by Michael Goffioul <goffioul@imec.be>
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# Modified by Arnold Moene <a.f.moene@eduphys.xs4all.nl>
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# Additional fixes by Kevin Ivory <Ivory@SerNet.de>
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# Derived from fax4CUPS 1.22, a fax backend for CUPS, to use X app to
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# pick up fax info by Glenn Burkhardt <gbburkhardt@verizon.net>
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export PATH=$PATH:/usr/local/bin
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prefix=/usr
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exec_prefix=${prefix}
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bindir=${exec_prefix}/bin
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PDFGUI=$bindir/maxpdf_frontend
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# Called with no arguments, we list the provided maxpdf backend
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# (serial devices are irrelevant here).
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if [ $# -eq 0 ]; then
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which $PDFGUI >& /dev/null
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if [ $? != 0 ]; then
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echo "ERROR: can't find MaxPdf program $i" 1>&2
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exit 1;
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fi
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echo "direct maxpdf:/local \"Unknown\" \"MaxPdf printer\""
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exit 0
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fi
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# Check that 'sudo' can be executed by whatever account CUPS uses to run
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SM=`sudo -l`
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if [ $? != 0 ]; then
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UIDMSG=`id`
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echo "ERROR: CUPS runs under '$UIDMSG'; can't run 'sudo': $SM" 1>&2
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exit 1
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fi
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# Get the user that owns the job
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USER=$2
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echo 1>&2 # Apparently the first character emitted is somehow "eaten" by the reader
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# Check for correct display variable to use. Most systems use :0.0;
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unset XAUTHORITY
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disp=`sudo -H -u $USER xauth list :0`
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if [ "$disp" = "" ] ; then
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disp=`sudo -H -u $USER xauth list | awk 'match($0, /(unix)(:[0-9][0-9]*)/, dn) { print dn[2]; exit }'`
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# check result
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export DISPLAY=$disp
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else
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export DISPLAY=:0
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fi
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# If we find six arguments, the last one is the pdf name; otherwise,
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# we're reading the fax data from stdin.
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# we copy the file in tmp directory, so everybody can access it
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PDFNAME=$(mktemp </dev/null /tmp/pdf.XXXXXX) || (echo "ERROR: Failed to create temporary file" 1>&2; exit 1)
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if [ $# -eq 6 ]; then
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# copy over file from spool directory
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cp $6 $PDFNAME
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else
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# copy from stdin
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cat > $PDFNAME
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fi
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# changes owner of temporary file so we can remove it from gui app
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# this is needed because this shell can terminate before gui app
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# finishes processing the file, so we can't remove it from here
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# This is the only sudo root access to the system, it can be safely
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# removed, but then spool files will stay in tmp directory until reboot
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chmod ugo+rw $PDFNAME
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sudo chown $USER:$USER $PDFNAME
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# Checks for the gui part of driver
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which $PDFGUI >& /dev/null
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if [ $? != 0 ]; then
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echo "ERROR: can't find '$PDFGUI' program; check execution search path" 1>&2
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exit 1
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fi
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# Use sudo to make sure that job is owned by the user that wants to "print",
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# not root. This is needed so that the owner of the job can remove it if
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# needed.
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# Some systems have /etc/sudoers configured with "Default env_reset", which
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# causes the DISPLAY environment variable to be thrown away. So we tell
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# 'sudo' to invoke a shell, and make sure the DISPLAY variable is set.
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# We use -b sudo option to run the command in background and detached from
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# this shell, so it can stay opened for more print cycles.
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# Doing so, we can't check the gui return value, so we assume it's ok
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# We add the PRINTER parameted to allow gui part of application to control
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# the print job, and to remove when it's completed; I didn't find any other
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# reliable way to empty printer queue AND leave gui part opened
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# CUPS ARGUMENTS : job user title copies options faxfile printer
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sudo -b -H -u $USER /bin/sh -c "DISPLAY=$DISPLAY $PDFGUI $1 $2 \"$3\" $4 \"$5\" $PDFNAME $PRINTER"
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# exit signaling all ok to cups subsystem
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exit 0
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