Escape Double Quotes Inside pct exec "cmd"

[Proxygen]

inside the container

$ bash /home/ubuntu/scripts/logsigmonitor.sh 1 | while read LOGLINE; do echo "${LOGLINE}"; done

continuously outputs the desired (filtered) log messages to the terminal. but on the host

/usr/sbin/pct exec 107 -- bash -c "bash /home/ubuntu/scripts/logsigmonitor.sh 1 | while read LOGLINE; do echo \"${LOGLINE}\"; done"

only outputs blank lines for each line the script inside the container prints.

how do i escape the quotes inside the bash cmd in the host?

 

[Moayad]

Hi,

Are you tried double quotes inside single quotes like this example?

pct exec 107 -- bash -c 'curl -I -k "https://10.0.0.1:8006"; id'

 

[Proxygen]

bash: -c: line 0: syntax error near unexpected token `;'

tried with single quotes around the cmd, and unescaped double quotes inside the cmd:

'bash /home/ubuntu/scripts/logsigmonitor.sh $var | while read LOGLINE; do; echo "${LOGLINE}"; done'

it might work if we didn't need $var inside the cmd. we need $var to be contained within double quotes for variable expansion.

 

[Moayad]

Works with me

pct exec 107 -- bash -c 'curl -I -k "https://10.0.0.1:8006"; 'x=10'; echo $x'

Output:

HTTP/1.1 501 method 'HEAD' not available

Cache-Control: max-age=0

Connection: close

Date: Wed, 27 May 2020 06:21:34 GMT

Pragma: no-cache

Server: pve-api-daemon/3.0

Expires: Wed, 27 May 2020 06:21:34 GMT


10

 

[Proxygen]

This works because $x is created inside the statement `pct exec 107 -- bash -c 'curl -I -k "https://10.0.0.1:8006"; 'x=10'; echo $x'`

This does not work: a variable is passed to the script (on the host) to expand when used inside the `pct exec` statement. it does not expand inside single quotes.