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cups-files.conf(5) OpenPrinting cups-files.conf(5) NAME cups-files.conf - file and directory configuration file for cups DESCRIPTION The cups-files.conf file configures the files and directories used by the CUPS scheduler, cupsd(8). It is normally located in the /usr/lo- cal/etc/cups directory. Each line in the file can be a configuration directive, a blank line, or a comment. Configuration directives typically consist of a name and zero or more values separated by whitespace. The configuration direc- tive name and values are case-insensitive. Comment lines start with the # character. DIRECTIVES The following directives are understood by cupsd(8): AccessLog AccessLog filename AccessLog stderr AccessLog syslog Defines the access log filename. Specifying a blank filename dis- ables access log generation. The value "stderr" causes log en- tries to be sent to the standard error file when the scheduler is running in the foreground, or to the system log daemon when run in the background. The value "syslog" causes log entries to be sent to the system log daemon. The server name may be included in filenames using the string "%s", for example: AccessLog /var/log/cups/%s-access_log The default is "/var/log/cups/access_log". CacheDir directory Specifies the directory to use for long-lived temporary (cache) files. The default is "/var/spool/cups/cache" or "/var/cache/cups" depending on the platform. ConfigFilePerm mode Specifies the permissions for all configuration files that the scheduler writes. The default is "0644" on macOS and "0640" on all other operating systems. Note: The permissions for the printers.conf file are currently masked to only allow access from the scheduler user (typically root). This is done because printer device URIs sometimes contain sensitive authenti- cation information that should not be generally known on the system. There is no way to disable this security feature. CreateSelfSignedCerts yes CreateSelfSignedCerts no Specifies whether the scheduler automatically creates self-signed certificates for client connections using TLS. The default is yes. DataDir path Specifies the directory where data files can be found. The de- fault is usually "/usr/share/cups". DocumentRoot directory Specifies the root directory for the CUPS web interface content. The default is usually "/usr/share/doc/cups". ErrorLog ErrorLog filename ErrorLog stderr ErrorLog syslog Defines the error log filename. Specifying a blank filename dis- ables error log generation. The value "stderr" causes log entries to be sent to the standard error file when the scheduler is run- ning in the foreground, or to the system log daemon when run in the background. The value "syslog" causes log entries to be sent to the system log daemon. The server name may be included in filenames using the string "%s", for example: ErrorLog /var/log/cups/%s-error_log The default is "/var/log/cups/error_log". FatalErrors none FatalErrors all -kind [ ... -kind ] FatalErrors kind [ ... kind ] Specifies which errors are fatal, causing the scheduler to exit. The default is "config". The kind strings are: none No errors are fatal. all All of the errors below are fatal. browse Browsing initialization errors are fatal, for example failed connections to the DNS-SD daemon. config Configuration file syntax errors are fatal. listen Listen or Port errors are fatal, except for IPv6 failures on the loopback or "any" addresses. log Log file creation or write errors are fatal. permissions Bad startup file permissions are fatal, for example shared TLS certificate and key files with world-read permissions. Group group-name-or-number Specifies the group name or ID that will be used when executing external programs. The default group is operating system specific but is usually "lp" or "nobody". LogFileGroup group-name-or-number Specifies the group name or ID that will be used for log files. The default group is operating system specific but is usually "lp" or "nobody". LogFilePerm mode Specifies the permissions of all log files that the scheduler writes. The default is "0644". PageLog [ filename ] PageLog stderr PageLog syslog Defines the page log filename. The value "stderr" causes log en- tries to be sent to the standard error file when the scheduler is running in the foreground, or to the system log daemon when run in the background. The value "syslog" causes log entries to be sent to the system log daemon. Specifying a blank filename disables page log generation. The server name may be included in filenames using the string "%s", for example: PageLog /var/log/cups/%s-page_log The default is "/var/log/cups/page_log". PassEnv variable [ ... variable ] Passes the specified environment variable(s) to child processes. Note: the standard CUPS filter and backend environment variables cannot be overridden using this directive. RemoteRoot username Specifies the username that is associated with unauthenticated ac- cesses by clients claiming to be the root user. The default is "remroot". RequestRoot directory Specifies the directory that contains print jobs and other HTTP request data. The default is "/var/spool/cups". Sandboxing relaxed Sandboxing strict Specifies the level of security sandboxing that is applied to print filters, backends, and other child processes of the sched- uler. The default is "strict". This directive is currently only used/supported on macOS. ServerBin directory Specifies the directory containing the backends, CGI programs, filters, helper programs, notifiers, and port monitors. The de- fault is "/usr/lib/cups" or "/usr/libexec/cups" depending on the platform. ServerKeychain path Specifies the location of TLS certificates and private keys. The default is "/Library/Keychains/System.keychain" on macOS and "/usr/local/etc/cups/ssl" on all other operating systems. macOS uses its keychain database to store certificates and keys while other platforms use separate files in the specified directory, *.crt for PEM-encoded certificates and *.key for PEM-encoded pri- vate keys. ServerRoot directory Specifies the directory containing the server configuration files. The default is "/usr/local/etc/cups". SetEnv variable value Set the specified environment variable to be passed to child processes. Note: the standard CUPS filter and backend environment variables cannot be overridden using this directive. StateDir directory Specifies the directory to use for PID and local certificate files. The default is "/var/run/cups" or "/usr/local/etc/cups" depending on the platform. ipUserDomain Yes ipUserDomain No Specifies whether to remove domain from user name during local user authentication (e.g., "user@example.com" > "user"). This practice can be beneficial for maintaining compatibility with older versions of Kerberos. However, enabling this option can have negative consequences. It may result in confusion between domain and local users with identical names, potentially leading to incorrect assignment of user permissions and unintentional per- mission escalation, thus creating a security risk. Therefore, it is advisable to avoid using this option in most cases. SyncOnClose Yes SyncOnClose No Specifies whether the scheduler calls fsync(2) after writing con- figuration or state files. SystemGroup group-name [ ... group-name ] Specifies the group(s) to use for @SYSTEM group authentication. The default contains "admin", "lpadmin", "root", "sys", and/or "system". TempDir directory Specifies the directory where short-term temporary files are stored. The default is "/var/spool/cups/tmp". User username Specifies the user name or ID that is used when running external programs. The default is "lp". DEPRECATED DIRECTIVES The following directives are deprecated and will be removed from a fu- ture version of CUPS: FileDevice Yes FileDevice No Specifies whether the file pseudo-device can be used for new printer queues. The URI "file:///dev/null" is always allowed. File devices cannot be used with "raw" print queues - a PPD file is required. The specified file is overwritten for every print job. Writing to directories is not supported. Printcap filename Specifies a file that is filled with a list of local print queues. PrintcapFormat bsd PrintcapFormat plist PrintcapFormat solaris Specifies the format to use for the Printcap file. "bsd" is the historical LPD printcap file format. "plist" is the Apple plist file format. "solaris" is the historical Solaris LPD printcap file format. NOTES The scheduler MUST be restarted manually after making changes to the cups-files.conf file. On Linux this is typically done using the sys- temctl(8) command, while on macOS the launchctl(8) command is used in- stead. SEE ALSO classes.conf(5), cups(1), cupsd(8), cupsd.conf(5), mime.convs(5), mime.types(5), printers.conf(5), subscriptions.conf(5), CUPS Online Help (http://localhost:631/help) COPYRIGHT Copyright (C) 2020-2024 by OpenPrinting. 2021-03-06 CUPS cups-files.conf(5)
NAME | DESCRIPTION | NOTES | SEE ALSO | COPYRIGHT
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