[Solved] Bash command to update a variable

---

@Gleno0h said in Bash command to update a variable:

@temp what @mwittig said and following line doesnt make sense to me…

My comment was referring to the following error and the command snippets @temp sent in post 11, but I have been misled by the strange formatting he used in his post.

curl: (3) [globbing] unmatched close brace/bracket in column 7
SyntaxError: Unexpected end of input

@temp Actually, I think the problem is bad quotation. The following modified command sequence based on post 11 works for me. See also 2nd post at https://superuser.com/questions/835587/how-to-include-environment-variable-in-bash-line-curl for details.

pi@raspi3:~ $ stop_timestamp=1494910730
# Space in the date format string below must be escaped
pi@raspi3:~ $ t=`date -d@$stop_timestamp +%d-%m-%Y\ %H:%M`
# Single quotes around shell variables must be quoted!
pi@raspi3:~ $ curl -X PATCH --header "Content-Type:application/json" --data '{"type": "value", "valueOrExpression": "'"$t"'"}' --user "a:a" http://smarthome:5001/api/variables/variable_string_today
{"variable":{"name":"variable_string_today","readonly":false,"type":"value","value":"16-05-2017 06:58","unit":""},"success":true}

EDIT: @temp In your example the inner double quotes for the variable are missing which expands to the following as the shell with quote the space character for you.... "valueOrExpression": "16-05-2017' '06:58". That’s causing the syntax error. You can easily trace that yourself by setting set -x in your shell.

pi@raspi3:~ $ set -x
pi@raspi3:~ $ curl -X PATCH --header "Content-Type:application/json" --data '{"type": "value", "valueOrExpression": "'"$t"'"}' --user "a:a" http://smarthome:5001/api/variables/variable_string_today
+ curl -X PATCH --header Content-Type:application/json --data '{"type": "value", "valueOrExpression": "16-05-2017 06:58"}' --user a:a http://smarthome:5001/api/variables/variable_string_today
{"variable":{"name":"variable_string_today","readonly":false,"type":"value","value":"16-05-2017 06:58","unit":""},"success":true}pi@raspi3:~ $
pi@raspi3:~ $
pi@raspi3:~ $ curl -X PATCH --header "Content-Type:application/json" --data '{"type": "value", "valueOrExpression": "'$t'"}' --user "a:a" http://smarthome:5001/api/variables/variable_string_today
+ curl -X PATCH --header Content-Type:application/json --data '{"type": "value", "valueOrExpression": "16-05-2017' '06:58"}' --user a:a http://smarthome:5001/api/variables/variable_string_today
curl: (3) [globbing] unmatched close brace/bracket in column 7
SyntaxError: Unexpected end of input
    at Object.parse (native)
    at parse (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/lib/types/json.js:88:17)
    at /home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/lib/read.js:116:18
    at invokeCallback (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/node_modules/raw-body/index.js:262:16)
    at done (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/node_modules/raw-body/index.js:251:7)
    at IncomingMessage.onEnd (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/node_modules/raw-body/index.js:307:7)
    at emitNone (events.js:67:13)
    at IncomingMessage.emit (events.js:166:7)
    at endReadableNT (_stream_readable.js:923:12)
    at nextTickCallbackWith2Args (node.js:458:9)
    at process._tickDomainCallback (node.js:413:17)pi@raspi3:~ $

Use set +x to switch off the trace
Hope, this helps

@Gleno0h said in Bash command to update a variable:

wake_start_time=date -d@$wake_start_timestamp +%d-%m-%Y %H:%M

This wont’t work. The space must be escaped with a backslash \. Otherwise you will get the syntax error in the curl command. It won’t work from the command line, either.

pi@raspi3:~ $ wake_start_timestamp=1494910730                                                                                                                                          
pi@raspi3:~ $ date -d@$wake_start_timestamp +%d-%m-%Y %H:%M
date: zusätzlicher Operand „%H:%M“
„date --help“ liefert weitere Informationen.
pi@raspi3:~ $ date -d@$wake_start_timestamp +%d-%m-%Y\ %H:%M
16-05-2017 06:58

EDIT: Alternatively, you can do the following which is more or less what you suggested

pi@raspi3:~ $ date -d@$wake_start_timestamp '+%d-%m-%Y %H:%M'
16-05-2017 06:58

As you can see, i only removed the /…

No, you also added single quotes around the format string.

@temp Any progress on this?

@mwittig said in Bash command to update a variable:

@Gleno0h said in Bash command to update a variable:

@temp what @mwittig said and following line doesnt make sense to me…

My comment was referring to the following error and the command snippets @temp sent in post 11, but I have been misled by the strange formatting he used in his post.

curl: (3) [globbing] unmatched close brace/bracket in column 7
SyntaxError: Unexpected end of input

@temp Actually, I think the problem is bad quotation. The following modified command sequence based on post 11 works for me. See also 2nd post at https://superuser.com/questions/835587/how-to-include-environment-variable-in-bash-line-curl for details.

pi@raspi3:~ $ stop_timestamp=1494910730
# Space in the date format string below must be escaped
pi@raspi3:~ $ t=`date -d@$stop_timestamp +%d-%m-%Y\ %H:%M`
# Single quotes around shell variables must be quoted!
pi@raspi3:~ $ curl -X PATCH --header "Content-Type:application/json" --data '{"type": "value", "valueOrExpression": "'"$t"'"}' --user "a:a" http://smarthome:5001/api/variables/variable_string_today
{"variable":{"name":"variable_string_today","readonly":false,"type":"value","value":"16-05-2017 06:58","unit":""},"success":true}

EDIT: @temp In your example the inner double quotes for the variable are missing which expands to the following as the shell with quote the space character for you.... "valueOrExpression": "16-05-2017' '06:58". That’s causing the syntax error. You can easily trace that yourself by setting set -x in your shell.

pi@raspi3:~ $ set -x
pi@raspi3:~ $ curl -X PATCH --header "Content-Type:application/json" --data '{"type": "value", "valueOrExpression": "'"$t"'"}' --user "a:a" http://smarthome:5001/api/variables/variable_string_today
+ curl -X PATCH --header Content-Type:application/json --data '{"type": "value", "valueOrExpression": "16-05-2017 06:58"}' --user a:a http://smarthome:5001/api/variables/variable_string_today
{"variable":{"name":"variable_string_today","readonly":false,"type":"value","value":"16-05-2017 06:58","unit":""},"success":true}pi@raspi3:~ $
pi@raspi3:~ $
pi@raspi3:~ $ curl -X PATCH --header "Content-Type:application/json" --data '{"type": "value", "valueOrExpression": "'$t'"}' --user "a:a" http://smarthome:5001/api/variables/variable_string_today
+ curl -X PATCH --header Content-Type:application/json --data '{"type": "value", "valueOrExpression": "16-05-2017' '06:58"}' --user a:a http://smarthome:5001/api/variables/variable_string_today
curl: (3) [globbing] unmatched close brace/bracket in column 7
SyntaxError: Unexpected end of input
    at Object.parse (native)
    at parse (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/lib/types/json.js:88:17)
    at /home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/lib/read.js:116:18
    at invokeCallback (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/node_modules/raw-body/index.js:262:16)
    at done (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/node_modules/raw-body/index.js:251:7)
    at IncomingMessage.onEnd (/home/pi/pimatic-dev/node_modules/pimatic/node_modules/body-parser/node_modules/raw-body/index.js:307:7)
    at emitNone (events.js:67:13)
    at IncomingMessage.emit (events.js:166:7)
    at endReadableNT (_stream_readable.js:923:12)
    at nextTickCallbackWith2Args (node.js:458:9)
    at process._tickDomainCallback (node.js:413:17)pi@raspi3:~ $

Use set +x to switch off the trace
Hope, this helps

–>Solved Thanks to everyone

–>Next topic/question to solve everything https://forum.pimatic.org/topic/3047/kodi-shutdown-command