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HP-UX Reference > Ppcnfsd(1M)HP-UX 11i Version 2: December 2007 Update |
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NAMEpcnfsd: rpc.pcnfsd — PC-NFS authentication and print request server DESCRIPTIONpcnfsd is an RPC server that supports ONC clients on PC (DOS, OS/2, Macintosh, and other) systems. This describes version two of the pcnfsd server. pcnfsd can be started from the /sbin/init.d/nfs.server startup script by setting the PCNFS_SERVER variable to 1 in /etc/rc.config.d/nfsconf, or from the inetd daemon (see inetd(1M)). It reads the configuration file /etc/pcnfsd.conf, if present, and services RPC requests directed to program number 150001. The pcnfsd daemon supports version 1 and version 2 of the PCNFSD protocol. A fixed port can be specified for pcnfsd by adding a line to the /etc/pcnfsd.conf file in the form: port port_number The port number can have any value between 1 and 65535. After adding the line for specifying the fixed port to the /etc/pcnfsd.conf file, pcnfsd must be restarted for this to take effect. This feature can be disabled by deleting or commenting out the line specifying the fixed port from the /etc/pcnfsd.conf file and restarting pcnfsd. The requests serviced by pcnfsd fall into three categories: authentication, printing, and other. Only the authentication and printing categories have administrative significance. AuthenticationWhen pcnfsd receives a PCNFSD_AUTH or PCNFSD2_AUTH request, it will "log in" the user by validating the user name and password, returning the corresponding user ID, group IDs, home directory, and umask. It will also append a record to the wtmp data base (see wtmp(4)). If you do not want PC "logins" recorded in this way, add a line to the /etc/pcnfsd.conf file in the form: wtmp off By default, pcnfsd will only allow authentication or print requests for users with user IDs in the range 101 to 60002 (this corresponds, in SVR4, to the range for nonsystem accounts). To override this, add a line to the /etc/pcnfsd.conf file in the form: uidrange range [, range ]... where each range is a user ID number in the form uid or an inclusive range of user ID numbers in the form uid-uid NOTE: pcnfsd will deny authentication if the /etc/shells file is incorrectly setup. Printingpcnfsd supports a printing model that uses NFS to transfer print data from the client to the server. The client system issues a PCNFSD_PR_INIT or PCNFSD2_PR_INIT request, and the server returns the path to a spool directory that is exported by NFS for use by the client. pcnfsd creates a subdirectory for each client. By default, the parent directory is /var/spool/pcnfs, and the name of each subdirectory is the same as its client's host name. To use a different parent directory, add a line to the /etc/pcnfsd.conf file in the form: spooldir path Once a client has mounted the spool directory using NFS, and transferred print data to a file in that directory, it will issue a PCNFSD_PR_START or PCNFSD2_PR_START request. pcnfsd handles most print-related requests by constructing a command based on the printing services of the server's operating system, and executing that command using the identity of the PC user. Because this involves set-user-ID privileges, pcnfsd must be run as root. Every print request from a client includes the name of the printer to be used. This name corresponds to a printer that has been configured into the line printer spooling system using the lpadmin command. To process print data in a special way (for example, to print it in landscape mode, or to print it in duplex mode), define a new printer and arrange for the client to print to that printer. There are two ways to define the new printer:
ReconfigurationBy checking the modification time (and contents) of the file /var/spool/lp/pstatus, pcnfsd will detect when printers have been added or deleted, and will rebuild its list of valid printers. However, pcnfsd does not monitor the file /etc/pcnfsd.conf for updates; if you change this file, you must kill and restart pcnfsd for the changes to take effect. EXAMPLESGiven the following entries for the file /etc/pcnfsd.conf: printer abc lj lp -dlj -oraw printer test - /usr/bin/cp $FILE /usr/tmp/$HOST-$USER If a user on a client system prints a job on printer abc, the request will be sent to destination lj in raw mode. If the client requests a list of the print queue for printer abc, the pcnfsd daemon will translate this into a request for a listing for printer lj. Printer test is used only for testing. Any file sent to this printer will be copied into the directory /usr/tmp. Any request to list the queue, check the status, and so on, of printer test will be rejected because alias-for has been specified as a hyphen (-). |
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