From 4ca4febd67fb0f54d1f3d1081c674c322b1b87a7 Mon Sep 17 00:00:00 2001 From: Jelmer Vernooij Date: Mon, 4 Nov 2002 18:25:25 +0000 Subject: Large number of updates - new structure of the HOWTO, better names, introductions, updating to 3.0 (This used to be commit dfc3d55493c40201244a9e44b89868f7128c6f85) --- docs/docbook/projdoc/printer_driver2.sgml | 501 ++++++++++++++++++++++++------ 1 file changed, 401 insertions(+), 100 deletions(-) (limited to 'docs/docbook/projdoc/printer_driver2.sgml') diff --git a/docs/docbook/projdoc/printer_driver2.sgml b/docs/docbook/projdoc/printer_driver2.sgml index 85ae0713b3..7bca8dc6f5 100644 --- a/docs/docbook/projdoc/printer_driver2.sgml +++ b/docs/docbook/projdoc/printer_driver2.sgml @@ -11,12 +11,16 @@ - - + + PatrickPowell + +
papowell@lprng.org
+ + (3 May 2001) -Printing Support in Samba 2.2.x +Printing Support Introduction @@ -59,12 +63,7 @@ SPOOLSS support includes: There has been some initial confusion about what all this means and whether or not it is a requirement for printer drivers to be installed on a Samba host in order to support printing from Windows -clients. A bug existed in Samba 2.2.0 which made Windows NT/2000 clients -require that the Samba server possess a valid driver for the printer. -This is fixed in Samba 2.2.1 and once again, Windows NT/2000 clients -can use the local APW for installing drivers to be used with a Samba -served printer. This is the same behavior exhibited by Windows 9x clients. -As a side note, Samba does not use these drivers in any way to process +clients. As a side note, Samba does not use these drivers in any way to process spooled files. They are utilized entirely by the clients. @@ -104,16 +103,9 @@ parameter named printer driver provided a means of defining the printer driver name to be sent to the client. - - -These parameters, including printer driver -file parameter, are being deprecated and should not -be used in new installations. For more information on this change, -you should refer to the Migration section -of this document. - - + + Creating [print$] @@ -243,10 +235,8 @@ that matches the printer shares defined on your Samba host. The initial listing of printers in the Samba host's Printers folder will have no real printer driver assigned -to them. By default, in Samba 2.2.0 this driver name was set to -NO PRINTER DRIVER AVAILABLE FOR THIS PRINTER. -Later versions changed this to a NULL string to allow the use -tof the local Add Printer Wizard on NT/2000 clients. +to them. This defaults to a NULL string to allow the use +of the local Add Printer Wizard on NT/2000 clients. Attempting to view the printer properties for a printer which has this default driver assigned will result in the error message: @@ -603,84 +593,6 @@ foreach (supported architecture for a given driver) - - -<anchor id="MIGRATION">Migration to from Samba 2.0.x to 2.2.x - - -Given that printer driver management has changed (we hope improved) in -2.2 over prior releases, migration from an existing setup to 2.2 can -follow several paths. Here are the possible scenarios for -migration: - - - - If you do not desire the new Windows NT - print driver support, nothing needs to be done. - All existing parameters work the same. - - If you want to take advantage of NT printer - driver support but do not want to migrate the - 9x drivers to the new setup, the leave the existing - printers.def file. When smbd attempts - to locate a - 9x driver for the printer in the TDB and fails it - will drop down to using the printers.def (and all - associated parameters). The make_printerdef - tool will also remain for backwards compatibility but will - be removed in the next major release. - - If you install a Windows 9x driver for a printer - on your Samba host (in the printing TDB), this information will - take precedence and the three old printing parameters - will be ignored (including print driver location). - - If you want to migrate an existing printers.def - file into the new setup, the current only solution is to use the Windows - NT APW to install the NT drivers and the 9x drivers. This can be scripted - using smbclient and rpcclient. See the - Imprints installation client at http://imprints.sourceforge.net/ - for an example. - - - - - -Achtung! - - -The following smb.conf parameters are considered to -be deprecated and will be removed soon. Do not use them in new -installations - - - - printer driver file (G) - - - printer driver (S) - - - printer driver location (S) - - - - - - -The have been two new parameters add in Samba 2.2.2 to for -better support of Samba 2.0.x backwards capability (disable -spoolss) and for using local printers drivers on Windows -NT/2000 clients (use client driver). Both of -these options are described in the smb.coinf(5) man page and are -disabled by default. - - - - - - + +Diagnosis + + +Introduction + + +This is a short description of how to debug printing problems with +Samba. This describes how to debug problems with printing from a SMB +client to a Samba server, not the other way around. For the reverse +see the examples/printing directory. + + + +Ok, so you want to print to a Samba server from your PC. The first +thing you need to understand is that Samba does not actually do any +printing itself, it just acts as a middleman between your PC client +and your Unix printing subsystem. Samba receives the file from the PC +then passes the file to a external "print command". What print command +you use is up to you. + + + +The whole things is controlled using options in smb.conf. The most +relevant options (which you should look up in the smb.conf man page) +are: + + + + [global] + print command - send a file to a spooler + lpq command - get spool queue status + lprm command - remove a job + [printers] + path = /var/spool/lpd/samba + + + +The following are nice to know about: + + + + queuepause command - stop a printer or print queue + queueresume command - start a printer or print queue + + + +Example: + + + + print command = /usr/bin/lpr -r -P%p %s + lpq command = /usr/bin/lpq -P%p %s + lprm command = /usr/bin/lprm -P%p %j + queuepause command = /usr/sbin/lpc -P%p stop + queuepause command = /usr/sbin/lpc -P%p start + + + +Samba should set reasonable defaults for these depending on your +system type, but it isn't clairvoyant. It is not uncommon that you +have to tweak these for local conditions. The commands should +always have fully specified pathnames, as the smdb may not have +the correct PATH values. + + + +When you send a job to Samba to be printed, it will make a temporary +copy of it in the directory specified in the [printers] section. +and it should be periodically cleaned out. The lpr -r option +requests that the temporary copy be removed after printing; If +printing fails then you might find leftover files in this directory, +and it should be periodically cleaned out. Samba used the lpq +command to determine the "job number" assigned to your print job +by the spooler. + + + +The %>letter< are "macros" that get dynamically replaced with appropriate +values when they are used. The %s gets replaced with the name of the spool +file that Samba creates and the %p gets replaced with the name of the +printer. The %j gets replaced with the "job number" which comes from +the lpq output. + + + + + +Debugging printer problems + + +One way to debug printing problems is to start by replacing these +command with shell scripts that record the arguments and the contents +of the print file. A simple example of this kind of things might +be: + + + + print command = /tmp/saveprint %p %s + + #!/bin/saveprint + # we make sure that we are the right user + /usr/bin/id -p >/tmp/tmp.print + # we run the command and save the error messages + # replace the command with the one appropriate for your system + /usr/bin/lpr -r -P$1 $2 2>>&/tmp/tmp.print + + + +Then you print a file and try removing it. You may find that the +print queue needs to be stopped in order to see the queue status +and remove the job: + + + + +h4: {42} % echo hi >/tmp/hi +h4: {43} % smbclient //localhost/lw4 +added interface ip=10.0.0.4 bcast=10.0.0.255 nmask=255.255.255.0 +Password: +Domain=[ASTART] OS=[Unix] Server=[Samba 2.0.7] +smb: \> print /tmp/hi +putting file /tmp/hi as hi-17534 (0.0 kb/s) (average 0.0 kb/s) +smb: \> queue +1049 3 hi-17534 +smb: \> cancel 1049 +Error cancelling job 1049 : code 0 +smb: \> cancel 1049 +Job 1049 cancelled +smb: \> queue +smb: \> exit + + + +The 'code 0' indicates that the job was removed. The comment +by the smbclient is a bit misleading on this. +You can observe the command output and then and look at the +/tmp/tmp.print file to see what the results are. You can quickly +find out if the problem is with your printing system. Often people +have problems with their /etc/printcap file or permissions on +various print queues. + + + + +What printers do I have? + + +You can use the 'testprns' program to check to see if the printer +name you are using is recognized by Samba. For example, you can +use: + + + + testprns printer /etc/printcap + + + +Samba can get its printcap information from a file or from a program. +You can try the following to see the format of the extracted +information: + + + + testprns -a printer /etc/printcap + + testprns -a printer '|/bin/cat printcap' + + + + + +Setting up printcap and print servers + + +You may need to set up some printcaps for your Samba system to use. +It is strongly recommended that you use the facilities provided by +the print spooler to set up queues and printcap information. + + + +Samba requires either a printcap or program to deliver printcap +information. This printcap information has the format: + + + + name|alias1|alias2...:option=value:... + + + +For almost all printing systems, the printer 'name' must be composed +only of alphanumeric or underscore '_' characters. Some systems also +allow hyphens ('-') as well. An alias is an alternative name for the +printer, and an alias with a space in it is used as a 'comment' +about the printer. The printcap format optionally uses a \ at the end of lines +to extend the printcap to multiple lines. + + + +Here are some examples of printcap files: + + + + + +pr just printer name + + +pr|alias printer name and alias + + +pr|My Printer printer name, alias used as comment + + +pr:sh:\ Same as pr:sh:cm= testing + :cm= \ + testing + + +pr:sh Same as pr:sh:cm= testing + :cm= testing + + + + + +Samba reads the printcap information when first started. If you make +changes in the printcap information, then you must do the following: + + + + + +make sure that the print spooler is aware of these changes. +The LPRng system uses the 'lpc reread' command to do this. + + + +make sure that the spool queues, etc., exist and have the +correct permissions. The LPRng system uses the 'checkpc -f' +command to do this. + + + +You now should send a SIGHUP signal to the smbd server to have +it reread the printcap information. + + + + + + +Job sent, no output + + +This is the most frustrating part of printing. You may have sent the +job, verified that the job was forwarded, set up a wrapper around +the command to send the file, but there was no output from the printer. + + + +First, check to make sure that the job REALLY is getting to the +right print queue. If you are using a BSD or LPRng print spooler, +you can temporarily stop the printing of jobs. Jobs can still be +submitted, but they will not be printed. Use: + + + + lpc -Pprinter stop + + + +Now submit a print job and then use 'lpq -Pprinter' to see if the +job is in the print queue. If it is not in the print queue then +you will have to find out why it is not being accepted for printing. + + + +Next, you may want to check to see what the format of the job really +was. With the assistance of the system administrator you can view +the submitted jobs files. You may be surprised to find that these +are not in what you would expect to call a printable format. +You can use the UNIX 'file' utitily to determine what the job +format actually is: + + + + cd /var/spool/lpd/printer # spool directory of print jobs + ls # find job files + file dfA001myhost + + + +You should make sure that your printer supports this format OR that +your system administrator has installed a 'print filter' that will +convert the file to a format appropriate for your printer. + + + + + +Job sent, strange output + + +Once you have the job printing, you can then start worrying about +making it print nicely. + + + +The most common problem is extra pages of output: banner pages +OR blank pages at the end. + + + +If you are getting banner pages, check and make sure that the +printcap option or printer option is configured for no banners. +If you have a printcap, this is the :sh (suppress header or banner +page) option. You should have the following in your printer. + + + + printer: ... :sh + + + +If you have this option and are still getting banner pages, there +is a strong chance that your printer is generating them for you +automatically. You should make sure that banner printing is disabled +for the printer. This usually requires using the printer setup software +or procedures supplied by the printer manufacturer. + + + +If you get an extra page of output, this could be due to problems +with your job format, or if you are generating PostScript jobs, +incorrect setting on your printer driver on the MicroSoft client. +For example, under Win95 there is a option: + + + + Printers|Printer Name|(Right Click)Properties|Postscript|Advanced| + + + +that allows you to choose if a Ctrl-D is appended to all jobs. +This is a very bad thing to do, as most spooling systems will +automatically add a ^D to the end of the job if it is detected as +PostScript. The multiple ^D may cause an additional page of output. + + + + + +Raw PostScript printed + + +This is a problem that is usually caused by either the print spooling +system putting information at the start of the print job that makes +the printer think the job is a text file, or your printer simply +does not support PostScript. You may need to enable 'Automatic +Format Detection' on your printer. + + + + + +Advanced Printing + + +Note that you can do some pretty magic things by using your +imagination with the "print command" option and some shell scripts. +Doing print accounting is easy by passing the %U option to a print +command shell script. You could even make the print command detect +the type of output and its size and send it to an appropriate +printer. + + + + + +Real debugging + + +If the above debug tips don't help, then maybe you need to bring in +the bug guns, system tracing. See Tracing.txt in this directory. + + + + -- cgit