getINDI

Name

getINDI − get INDI property values

Synopsis

getINDI [options] [device.property.element ...]

Description

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:

device.property.element

Any component may be an asterisk, “*”, to serve as a wild card that matches all names in that component of the specification. If no property is specified, then all properties match, i.e., it is as if the specification “*.*.*” were given.

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:

_LABEL

report the label attribute

_GROUP

report the group attribute

_STATE

report the state attribute

_PERM

report the permission attribute

_TO

report the timeout attribute

_TS

report the timestamp attribute

Options

-1

print just the value if expectiong exactly one matching property

-B

enable downloading BLOBs

-d <f>

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:

#!/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 (/[=0/, ’getINDI -d $directfd’);

-h <h>

connect to alternate host h; the default is localhost.

-m

continue to monitor for subsequent changes to each specified property until timeout.

-p <p>

connect using alternate port p; the default is 7624.

-q

suppress some error message.

-t <t>

wait no longer than t seconds of no activity to gather the values for all the specified properties; the default is 2 seconds. Specify 0 to wait forever.

-v

generate additional information on stderr. This is cumulative in that specifying more -v options will generate more output.

-w

Usually only readable properties are shown. If this flag is set, then all properties, including those that are write-only, are shown.

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:

property=value

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. Note that BLOBs are not read by default, only when the -B option is used.

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.

Examples

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:

%props = split (/[=0/, ’getINDI’);

Wait up to ten seconds to get the values of all properties from the Mount device on the given host and non-standard port:

getINDI -h indihost -p 7655 -t 10 "Mount.\*.\*"

Print just current value of the wind speed element from the weather device:

getINDI -1 Weather.Wind.Speed