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Дата изменения: Wed Aug 3 06:58:29 2011
Дата индексирования: Thu Feb 27 21:59:35 2014
Кодировка:
Поисковые слова: arp 220

.TH getINDI 1
.SH NAME
getINDI \- get INDI property values
.SH SYNOPSIS
\fBgetINDI [options] [device.property.element ...]\fP
.SH DESCRIPTION
.na
.nh
.PP
getINDI connects to an indiserver and reports the current value of one or more
properties. Each property is specified using three components in the form:
.IP
device.property.element
.PP
Any component may be an asterisk, "*", to serve as a wild card and match all
properties in that component of the specification. If no property is specified,
then all properties match, ie, it is as if the specification "*.*.*" were given.
.PP
The last component of the property specification is usually the element name,
but may be a reserved name to indicate an attribute of the property as a whole.
These reserved names are as follows:
.TP 12
_LABEL
report the label attribute
.TP
_GROUP
report the group attribute
.TP
_STATE
report the state attribute
.TP
_PERM
report the permission attribute
.TP
_TO
report the timeout attribute
.TP
_TS
report the timestamp attribute

.SH OPTIONS
.TP 8
-1
print just the value if expectiong exactly one matching property
.TP
-d
use file descriptor f already open as a socket to the indiserver. This is
useful for scripts to make a session connection one time then reuse it for
each invocation. If the file descriptor seems to be being closed, check that
the close-on-exec flag is off; for example in perl use something like:
.nf

#!/usr/bin/perl
use Socket;
use Fcntl;
socket(SOCK, PF_INET, SOCK_STREAM, getprotobyname('tcp'));
connect(SOCK, sockaddr_in(7624,inet_aton('localhost')));
fcntl(SOCK,F_SETFD,0);
$directfd = fileno(SOCK);
%props = split (/[=\n]/, `getINDI -d $directfd`);
.fi
.TP
-h
connect to alternate host h; the default is localhost.
.TP
-p

connect using alternate port p; the default is 7624.
.TP
-t
wait no longer than t seconds to gather the values for all the specified
properties; the default is 2 seconds.
.TP
-v
generate additional information on stderr. This is cumulative in that specifying
more -v options will generate more output.

.SH OUTPUT FORMAT
For properties that are not BLOBs, the output of getINDI is one line per
property. Unless the -1 option is given, each line is of the form:
.IP
property=value
.PP
A property that is a BLOB is saved in a file name
device.property.element.format. Z compression is handled automatically, other
formats are left unchanged.

.SH EXIT STATUS
The getINDI program exits with a status of 0 if it suceeded in finding the
value for each specified property. It exits with 1 if there was at least
one property for which no value was found within the given timeout period.
It exits with 2 if there was some other error such as not being able to
connect to the indiserver.

.SH EXAMPLES

.PP
In a perl script, gather all properties for the default indiserver and save
them in an associative array %props which can then be used to look up a property
value by name:
.IP
%props = split (/[=\n]/, `getINDI`);

.PP
Wait up to ten seconds to get the values of all properties from the Mount
device on the given host and non-standard port:
.IP
getINDI -h indihost -p 7655 -t 10 "Mount.*.*"

.PP
Print just current value of the wind speed element from the weather device:
.IP
getINDI -1 Weather.Wind.Speed

.SH SEE ALSO
.PP
evalINDI, setINDI, indiserver
.br
http://www.clearskyinstitute.com/INDI/INDI.pdf