freetds.conf — configuration file for FreeTDS

A section begins with a servername — the name of the server — in square brackets. The servername is chosen at the client's descretion. (One exception: with Sybase ASA the servername must match the database name to be used.) Sections contain properties, one per line, in the form name=value where name is the connection property to be described. Servernames and properties are not case sensitive. Values are case-preserving i.e., copied literally. Comments begin with either a semicolon (‘;’) or pound sign (‘#’) and continue to end of line. Blank lines are ignored. Whitespace surrounding the ‘=’ is ignored.

FREETDSCONF overrides name and location of the system-wide conf file TDSDUMP overrides the name and location of the FreeTDS log file TDSDUMPCONFIG specifies a name and location of a file that logs the search of configuration files TDSHOST overrides the host property TDSPORT overrides the port property TDSQUERY synonym for DSQUERY, the default servername TDSVER overrides the version specified in the freetds.conf The environment variables TDSVER, TDSDUMP, TDSPORT, TDSQUERY, and TDSHOST override values set by a .conf or interfaces file.

/etc/freetds/freetds.conf, ${HOME}/.freetds.conf

.conf files first appeared with version 0.53 of FreeTDS. FreeTDS 1.5.2 May 2, 2017 FREETDS.CONF(FreeTDS 5)

freetds.conf — configuration file for FreeTDS

The file is normally named /etc/freetds.conf or ${HOME}/.freetds.conf. That name can be overridden with the FREETDSCONF environment variable. FreeTDS will search conf files for a servername in the following order: 1. a filename set programmatically via dbsetifile() that is in .conf format 2. a filename in the environment variable FREETDSCONF that is in .conf format 3. ${HOME}/.freetds.conf if extant 4. /etc/freetds/freetds.conf The search stops with the first file containing the servername. If no conf file is found, FreeTDS searches for an interfaces file in the following order: 1. a filename set programmatically via dbsetifile() that is in interfaces format 2. ${HOME}/.interfaces 3. $SYBASE/interfaces (where $SYBASE is an environment variable) If the requested servername is not found in any configuration file, the fallback mechanism is: 1. attempt to convert the name to an IP address with inet_addr(3), else 2. attempt to convert the name to an IP address with gethostbyname(3), else 3. attempt to look up the literal name “SYBASE”

client charset encoding of client data; overrides locale(1) settings Domain: iconv character set names Default: ISO-8859-1 connect timeout seconds to wait for response from connect request Domain: 0 to MAX_INT Default: none debug flags logging granularity Domain: 32-bit integer Default: 0x4fff dump file specifies location of a logfile and turns on logging Domain: valid file name Default: none dump file append log data appended to file instead of re-writing for each connection Domain: yes/no Default: no emulate little endian forces big endian machines to act as little endian to communicate with Microsoft Servers Domain: yes/no Default: no encryption off disables encryption request use if available (default when tds version greater than 7.0) required allow encrypted connections only host Name of the host the server is running on. Domain: host name or IP address Default: SYBASE initial block size maximum size of a protocol block Domain: multiple of 512 Default: 512 instance name of Microsoft SQL Server instance to connect to (supersedes port) Domain: instance name Default: none port port number that the server is listening to Domain: any valid port Default: TDS 5.0, 5000; TDS 7.0 and up, 1433 tds version TDS protocol version to use Domain: 4.2, 5.0, 7.0, 7.1, 7.2 Default: --with-tdsver value (5.0 if unspecified) text size default value of TEXTSIZE, in bytes Domain: 0 to 4,294,967,295 Default: 4,294,967,295 timeout seconds to wait for response to a query Domain: 0 to MAX_INT Default: none (wait forever) Do not define both port and instance. One implies the other. Boolean property values may be denoted as on/off, true/false, or 1/0. DEBUGFLAGS The log's granularity can be controlled with the debugflags property. ValueMeaning0x02severeerror0x04error0x08warning0x10network0x20informationlevel10x40informationlevel20x80functiontraceandinfo0x1000showpid0x2000showtime0x4000showsourcelevelinfo(sourcefileandline)0x8000threadid(notimplemented).

The freetds.conf file describes Sybase and Microsoft database servers to the FreeTDS library. It comprises sections headed by a servername, followed by a list of connection properties denoted as name- value pairs. Defaults are defined via a [global] section. This file supersedes the interfaces file that Sybase defines for the same purpose, although the latter is still supported.