84 lines
2 KiB
Groff
84 lines
2 KiB
Groff
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.TH CONFIGFILE 5
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.SH NAME
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configfile \- generic configuration file format
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.SH SYNOPSIS
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.B */etc/*.conf
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.SH DESCRIPTION
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.de SP
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.if t .sp 0.4
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.if n .sp
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..
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The syntax of the generic configuration file format is as follows:
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.PP
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.RS
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.nf
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.ta +16n
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configfile: empty
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.ta +8n +8n
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| configline configfile
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;
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.ta +16n
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configline: wordlist '\fB;\fR'
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.ta +8n +8n
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| \fBinclude\fR string '\fB;\fR'
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;
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.ta +16n
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wordlist: empty
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.ta +8n +8n
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| word wordlist
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| string wordlist
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| '\fB{\fR' configfile '\fB}\fR' wordlist
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;
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empty: ;
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.fi
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.RE
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.PP
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A word is a sequence of letters, numbers, and characters from the set
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.BR "!#$%&*+-./<=>?[\e]^_|~" .
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A backslash
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.RB ( \e )
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may be followed by a character in the set
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.B abefnrstv
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to form a BEL, BS, ESC, FF, NL, CR, SP, TAB, or VT character. Followed by
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up to three octal digits a character of that value is formed, and likewise
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for an
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.B x
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followed by up to two hexadecimal digits. Any other character is left
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as-is. A backslash followed by whitespace is completely removed from the
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input. (This includes comments.)
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.PP
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A string is started by a single or double quote, a series of characters, and
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ended by the same type of quote it started with. Any character or
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escape with
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.B \e
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may be found in a string. Strings may not span lines.
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.PP
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Tokens are separated by whitespace, being the usual whitespace characters
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and comments. A comment starts with the
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.B #
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character, and ends at a newline.
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.PP
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The special word
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.B include
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tells that the file mentioned in the following string must be read and
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included at that point. The file is found relative to the directory the
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current configuration file is found in, unless its name starts with a
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.BR / .
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A file that doesn't exist is seen as empty.
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.PP
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A generic configuration file can be read with the functions described in
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.BR configfile (3).
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.SH EXAMPLES
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Have a look at
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.BR /etc/dhcp.conf .
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.SH "SEE ALSO"
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.BR configfile (3).
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.SH NOTES
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Inspired by the configuration file of Paul Vixie's
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.BR bind .
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.SH AUTHOR
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Kees J. Bot (kjb@cs.vu.nl)
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