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gmid.8
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.\" Copyright (c) 2021, 2022, 2023, 2024 Omar Polo <op@omarpolo.com>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.Dd April 27, 2024
.Dt GMID 8
.Os
.Sh NAME
.Nm gmid
.Nd Gemini server
.Sh SYNOPSIS
.Nm
.Bk -words
.Op Fl fhnVv
.Op Fl c Ar config
.Op Fl D Ar macro Ns = Ns Ar value
.Op Fl P Ar pidfile
.Ek
.Sh DESCRIPTION
.Nm
is a simple and minimal gemini server that can serve static files,
talk to FastCGI applications and act as a gemini reverse proxy.
.Pp
.Nm
rereads the configuration file when it receives
.Dv SIGHUP
and reopens log files when it receives
.Dv SIGUSR1 .
.Pp
The options are as follows:
.Bl -tag -width 14m
.It Fl c Ar config
Specifies the configuration file.
The default is
.Pa /etc/gmid.conf .
.It Fl D Ar macro Ns = Ns Ar value
Define
.Ar macro
to be set to
.Ar value
on the command line.
Overrides the definition of
.Ar macro
in the config file if present.
.It Fl f
Do not daemonize.
Stay and log in the foreground.
.It Fl h , Fl -help
Print the usage and exit.
.It Fl n
Check that the configuration is valid, but don't start the server.
If specified two or more time, dump the configuration in addition to
verify it.
.It Fl P Ar pidfile
Write daemon's pid to the given location.
.Ar pidfile
will also act as lock: if another process is holding a lock on that
file,
.Nm
will refuse to start.
.It Fl V , Fl -version
Print the version and exit.
.It Fl v
Verbose mode.
.El
.Sh EXAMPLES
To run
.Nm
a configuration file and a X.509 certificate must be provided.
A self-signed certificate, which are commonly used in the Geminispace,
can be generated using for e.g.\&
.Xr openssl 1 :
.Bd -literal -offset indent
# openssl req \-x509 \-newkey rsa:4096 \-nodes \e
\-keyout /etc/ssl/private/example.com.key \e
\-out /etc/ssl/example.com.pem \e
\-days 365 \-subj "/CN=example.com"
# chmod 600 /etc/ssl/example.com.crt
# chmod 600 /etc/ssl/private/example.com.key
.Ed
.Pp
Then
.Nm
can be started with
.Bd -literal -offset indent
# gmid -c /etc/gmid.conf
.Ed
.Sh SEE ALSO
.Xr gemexp 1 ,
.Xr gg 1 ,
.Xr gmid.conf 5
.Sh ACKNOWLEDGEMENTS
.Nm
uses the
.Dq Flexible and Economical
UTF-8 decoder written by
.An Bjoern Hoehrmann .
.Sh AUTHORS
.An -nosplit
The
.Nm
program was written by
.An Omar Polo Aq Mt op@omarpolo.com .
.Sh CAVEATS
.Bl -bullet
.It
All the root directories are opened during the daemon configuration;
if a root directory is deleted and then re-created,
.Nm
won't be able to serve files inside that directory until a reload.
This restriction only applies to the root directories and not their
content.
.It
a %2F sequence is indistinguishable from a literal slash: this is not
RFC3986-compliant.
.It
a %00 sequence is treated as invalid character and thus rejected.
.El