Failure to parse command line string containing colon (:)

[jleveque]

I need supervisor to run a command in which one of the arguments is itsef a format string which contains a colon. However, supervisor errors out upon parsing supervisor.conf with the following error:

Error: Format string [...] for [...] is badly formatted: unsupported format character ':' (0x3a) at index 30

I tried enclosing the argument list in quotes to no avail. Is there a workaround for this?

[mnaberez]

Is there a workaround for this?

Possibly. What is the exact command= line from the config file that it is rejecting?

[jleveque]

Here is an example command line:

command=/usr/sbin/dhcrelay -d -q -a %h:%p %P -i Vlan1000 192.168.0.1

The problem lies in the colon in the format string provided by the -a %h:%p %P argument.

[mnaberez]

supervisord uses the % character for its own format strings in the config file. You can still use the % character but you must escape it like %%:

command=/usr/sbin/dhcrelay -d -q -a %%h:%%p %%P -i Vlan1000 192.168.0.1

[jleveque]

Ah, thank you. I was focused on the colon due to the error message; I didn't realize the percent sign was the real culprit.