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 /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 entries
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 file-
names 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 authentica-
tion 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 default
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 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 file-
names 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 ex-
ternal 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 re-
quest 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 scheduler. The
default is "strict". This directive is currently only used/sup-
ported on macOS.
ServerBin directory
Specifies the directory containing the backends, CGI programs, fil-
ters, helper programs, notifiers, and port monitors. The default
is "/usr/lib/cups" or "/usr/libexec/cups" depending on the plat-
form.
ServerKeychain path
Specifies the location of TLS certificates and private keys. The
default is "/Library/Keychains/System.keychain" on macOS and
"/etc/cups/ssl" on all other operating systems. macOS uses its
keychain database to store certificates and keys while other plat-
forms use separate files in the specified directory, *.crt for PEM-
encoded certificates and *.key for PEM-encoded private keys.
ServerRoot directory
Specifies the directory containing the server configuration files.
The default is "/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 "/etc/cups" depending on the
platform.
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 system-
ctl(8) command, while on macOS the launchctl(8) command is used instead.
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 © 2020-2024 by OpenPrinting.
2021-03-06 CUPS cups-files.conf(5)
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