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.Dd Apr 26, 2017
.Dt CSI 1
.Os
.Sh NAME
.Nm csi
.Nd The CHICKEN Scheme interpreter
.Sh SYNOPSIS
.Nm
.Op Ar OPTION  ...
.Op Ar FILENAME ...
.Sh DESCRIPTION
.Nm
is an interpreter for the programming language Scheme supporting most of
the features as described in the Revised^5 Report on the Algorithmic
Language Scheme.
.Nm
is implemented as a program compiled with the CHICKEN compiler.
.Pp
.Ar FILENAME
is a Scheme source file name with optional extension.
.Ar OPTION
may be  one of the following:
.Bl -tag -width Ds
.It Fl h , Fl help
Display usage and exit.
.It Fl version
Display version and exit.
.It Fl release
Print release number and exit.
.It Fl i , Fl case-insensitive
Enable case-insensitive reading.
.It Fl e Ar EXPRESSION , Fl eval Ar EXPRESSION
Evaluate the given expression.
.It Fl p Ar EXPRESSION , Fl print Ar EXPRESSION
Evaluate and print the result(s) of the given expression.
.It Fl P Ar EXPRESSION , Fl pretty-print Ar EXPRESSION
Evaluate and print result(s) prettily.
.It Fl D Ar SYMBOL , Fl feature Ar SYMBOL
Register feature identifier.
.It Fl no-feature Ar SYMBOL
Disable built-in feature identifier.
.It Fl q , Fl quiet
Do not print banner.
.It Fl n , Fl no-init
Do not load initialization file.
.Sq .csirc
.It Fl b , Fl batch
Terminate after command-line processing.
.It Fl w , Fl no-warnings
Disable all warnings.
.It Fl K Ar STYLE , Fl keyword-style Ar STYLE
Enable alternative keyword-syntax
.Po prefix, suffix or none Pc
.It Fl no-parentheses-synonyms
Disable list delimiter synonyms.
.It Fl no-symbol-escape
Disables support for escaped symbols.
.It Fl r5rs-syntax
Disable the CHICKEN extensions to R5RS syntax.
.It Fl s Ar PATHNAME , Fl script Ar PATHNAME
Use interpreter for shell scripts.
.It Fl ss Ar PATHNAME
Run a script with a
.Sq main
procedure
.It Fl sx Ar PATHNAME
Same as
.Fl s ,
but print each expression as it is evaluated.
.It Fl setup-mode
Prefer the current directory when locating extensions.
.It Fl R Ar NAME , Fl require-extension Ar NAME
Import extension before executing code.
.It Fl I Ar PATHNAME , Fl include-path Ar PATHNAME
Add
.Ar PATHNAME
to the include path.
.It Fl -
Ignore all following options.
.El
.Sh ENVIRONMENT
The following environment variables change the behaviour of
.Nm Ns :
.Bl -tag -width CHICKEN_INCLUDE_PATH
.It Ev CSI_OPTIONS
When set to a string of command-line options, then the options are
passed implicitly to every direct or indirect invocation of
.Nm . Note that runtime options of the form
.Sq \&-: Ns Aq OPTIONS
cannot be passed using this method.
.It Ev CHICKEN_INCLUDE_PATH
Contains one or more pathnames where the interpreter should also look
for include files, separated by
.Sq \&;
characters.
.El
.Sh FILES
.Bl -tag -width 4n
.It Pa $XDG_CONFIG_HOME/chicken/csirc
Scheme file loaded on startup. (
.Ev $XDG_CONFIG_HOME
defaults to
.Pa $HOME/.config
)
.It Pa $HOME/.csirc
Scheme file loaded on startup if the previous one doesn’t exists.
.El
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr chicken 1 ,
.Xr csc 1
.Pp
More information can be found in the
.Lk http://wiki.call-cc.org/manual/index "CHICKEN User's Manual".
.Sh AUTHORS
.An The CHICKEN Team
.Sh BUGS
Submit bug reports by e-mail to
.Mt chicken-janitors@nongnu.org