LPRng-HOWTO: 15 Oct 2001 (For LPRng-3.7.9)
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# 2.7. Checking System Installation with checkpc

The checkpc program is used to make sure that the spool directories and files used by LPRng have the correct permissions and are in place. By default, checkpc will check permissions and report if there are any problems. You should run this as `root`. For example:

        h4: {2} # checkpc
        Warning - No configuration file '/etc/lpd.conf'
        Warning - No lpd only printcap file found in '/etc/lpd_printcap'
        Warning -  ** cannot open '/var/run/lpd.printer' - 'Permission denied'
        Warning -  bad directory - /var/spool/lpd/lp
        Warning -   Printer 'lp' spool dir '/var/spool/lpd/lp' needs fixing

In the above example, checkpc has discovered that the `lpd.conf` file is missing. This is a serious problem and indicates that the software may be incorrectly installed.

The `lpd only printcap` message is usually of concern to administrators who wish to use some of LPRng's more exotic configuration options. It is possible to have separate `printcap` files for client and server programs. This is useful when `printcap` files get extremely large and cuts down substantially on system management problems.

The `permission denied` message for `/var/run/lpd.printer` is serious, as the lpd server uses this as a lock file.

The `bad directory` message about the spool directory is usually caused by wrong permissions or a missing directory.

The `checkpc -f` (fix) option causes checkpc to take action to rectify errors. The `checkpc -f -V` (verbose) option causes the fixup activity to be displayed a well:

        h4: {3} # checkpc -f -V
        Checking for configuration files '/etc/lpd.conf'
          found '/usr/local/etc/lpd.conf', mod 0100644
        Checking for printcap files '/etc/printcap'
          found '/usr/local/etc/printcap', mod 0100644
        Checking for lpd only printcap files '/etc/lpd_printcap'
         DaemonUID 1, DaemonGID 1
        Using Config file '/etc/lpd.conf'
        LPD lockfile '/var/run/lpd.printer'
         Checking directory: '/var/run'
           directory '/var'
           directory '/var/run'
          checking '/var/run/lpd.printer' file

        Checking printer 'lp'
         Checking directory: '/var/spool/lp'
           directory '/var'
           directory '/var/spool'
           directory '/var/spool/lp'
          file 'control.lp', zero length file unchanged in 1 hours
          file 'status.lp', zero length file unchanged in 1 hours
          file 'status', zero length file unchanged in 1 hours
          file 'log', zero length file unchanged in 1 hours
          file 'acct', zero length file unchanged in 1 hours
          checking 'control.lp' file
          checking 'status.lp' file
          checking 'status' file
          cleaning 'status' file, 0K bytes: no truncation
          checking 'log' file
          cleaning 'log' file, 0K bytes: no truncation
          checking 'acct' file
          cleaning 'acct' file, 0K bytes: no truncation

checkpc will create the spool directories and any missing files, and fix the permissions of existing files.

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