MAN.CONF(5)

NAME
man.conf - configuration file for manual pages

DESCRIPTION
The man.conf file contains the default configuration used by man(1), apropos(1), whatis(1), catman(8), and makemandb(8) to find manual pages and information about manual pages (e.g., the whatis(1) database).

Manual pages are located by searching an ordered set of directories called the “man path” for a file that matches the name of the requested page. Each directory in the search path usually has a set of subdirectories in it (though this is not required). When subdirectories are used, there are normally two subdirectories for each section of the manual. One subdirectory contains formatted copies of that section's manual pages that can be directly displayed to a terminal, while the other section subdirectory contains unformatted copies of the pages (see nroff(1) and mdoc(7)). Formatted manual pages are normally named with a trailing ‘.0’ suffix.

The man.conf file contains comment and configuration lines. Comment lines start with the ‘#’ character. Blank lines are also treated as comment lines. Configuration lines consist of a configuration keyword followed by a configuration string. There are two types of configuration keywords: control keywords and section keywords. Control keywords must start with the ‘_’ character. The following control keywords are currently defined:

_build
    Identifies the set of suffixes used for manual pages that must be formatted for display and the command that should be used to format them. Manual file names, regardless of their format, are expected to end in a “.*” pattern, i.e. a ‘’. followed by some suffix. The first field of a _build line contains a man page suffix specification. The suffix specification may contain the normal shell globbing characters ( not including csh-style curly braces). The rest of the _build line is a shell command line whose standard output is a formatted manual page that can be directly displayed to the user. There should be exactly one occurrence of the string ‘%s’ in the shell command line, and it will be replaced by the name of the file which is being formatted.

_crunch
    Used by catman(8) to determine how to crunch formatted pages which originally were compressed man pages. The first field lists a suffix which indicates what kind of compression was used to compress the man page. The rest of the line must be a shell command line, used to compress the formatted pages. There should be exactly one occurrence of the string ‘%s’ in the shell command line, and it will be replaced by the name of the output file.

_default
    Contains the system-wide default man path used to search for man pages.

_mandb
    Defines the full pathname (not just a directory path) for a database to be used by the apropos(1) and whatis(1) commands. The pathname may contain the normal shell globbing characters, including csh-style curly braces; to escape a shell globbing character, precede it with a backslash (‘\’).

_subdir
    Contains the list (in search order) of section subdirectories which will be searched in any man path directory named with a trailing slash (‘/’) character. This list is also used, even if there is no trailing slash character, when a path is specified to the man(1) utility by the user, by the MANPATH environment variable, or by the -M and -m options.

_suffix
    identifies the set of suffixes used for formatted man pages (the ‘.0’ suffix is normally used here). Formatted man pages can be directly displayed to the user. Each suffix may contain the normal shell globbing characters ( not including csh-style curly braces).

_version
    Contains the version of the configuration file.

_<machine>
    Defines additional paths to be searched for the particular machine hardware name whose literal value is taken from uname(1) -m. For example, on an amd64, the _amd64 control keyword is used, where ‘x86’ is supplied by default as an alternate machine path to also search.

Section configuration lines in man.conf consist of a section keyword naming the section and a configuration string that defines the directory or subdirectory path that the section's manual pages are located in. The path may contain the normal shell globbing characters, including csh-style curly braces; to escape a shell globbing character, precede it with a backslash (‘\’). Section keywords must not start with the ‘_’ character.

A section path may contain either a list of absolute directories or a list of relative directories (but not both). Relative directory paths are treated as a list of subdirectories that are appended to the current man path directory being searched. Section configuration lines with absolute directory paths (starting with ‘/’) completely replace the current man search path directory with their content.

Section configuration lines with absolute directory paths ending with a trailing slash character are expected to contain subdirectories of manual pages, (see the keyword _subdir above). The _subdir subdirectory list is not applied to absolute section directories if there is no trailing slash.

In addition to the above rules, the man(1) command also always checks in each directory that it searches for a subdirectory with the same name as the current machine type. If a machine-specific subdirectory is found, it is also searched before the parent directory is. This allows the manual to contain machine-specific man pages. Note that the machine subdirectory does not need to be specified in the man.conf file.

Multiple specifications for all types of man.conf configuration lines are cumulative and the entries are used in the order listed in the file; multiple entries may be listed per line, as well.

FILES
/etc/man.conf
    Standard manual configuration file.

EXAMPLES
Given the following man.conf file:

    _version	BSD.2
    _subdir		cat[123]
    _suffix		.0
    _build		.[1-9]	nroff -man %s
    _build		.tbl	tbl %s | nroff -man
    _i386		x86
    _default	/usr/share/man/
    sect3		/usr/share/man/{old/,}cat3

By default, the command “man mktemp” will search for mktemp.<digit> and mktemp.tbl in the directories /usr/share/man/cat1, /usr/share/man/cat2, and /usr/share/man/cat3. If on a machine of type “vax”, the subdirectory vax in each directory would be searched as well, before the directory was searched.

If mktemp.tbl was found first, the command “tbl <manual page> | nroff -man” would be run to build a man page for display to the user.

The command “man sect3 mktemp” would search the directories /usr/share/man/old/cat3 and /usr/share/man/cat3, in that order, for the mktemp manual page. If a subdirectory with the same name as the current machine type existed in any of them, it would be searched as well, before each of them were searched.

SEE ALSO
apropos(1), machine(1), man(1), whatis(1), whereis(1), fnmatch(3), glob(3), catman(8), makemandb(8)