utils/kamctl: allow the definition of a specific startup file at star…

[bundasmanu]

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
• Each component has a single commit (if not, squash them into one commit)
• No commits to README files for modules (changes must be done to docbook files
  in doc/ subfolder, the README file is autogenerated)

Type Of Change

• Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)

Checklist:

• PR should be backported to stable branches
• Tested changes locally
• Related to issue #XXXX (replace XXXX with an open issue number)

Description

Added the possibility to specify an alternative file different from the default: kamailio.cfg, when starting kamailio, using the kamctl tool.
This makes it possible to start kamailio by passing a startup file located in a specific folder (via ETCDIR env variable) and with a specific name, instead of using the default name: kamailio.cfg.

Several local tests have been performed and it has been verified that it is now possible to perform the basic start/stop/restart operations of kamailio via kamctl, considering the use of a startup file other than the default: kamailio.cfg.

Example of .kamctlrc used:

ETCDIR="/etc/my-component/confs"
RPCFIFOPATH="/run/my-component/my-component_rpc.fifo"
PID_FILE="/run/my-component/my-component.pid"
STARTUP_CONFIG_FILE="starter.cfg"
STARTOPTIONS="-m 512 -M 64 -u user -g group"

Tested on CentOS Linux release 7.9.2009 (Core).

I think this change will be interesting for many users.

Thanks

[dilyanpalauzov]

If this can be managed over an environment variable, then the latter shall include all the directories. As far as I see with this change, the file must still be in /etc (or $ETCDIR, but I assume both are almost thr same).

[bundasmanu]

No, with this change we can use any directory and any startup config filename to manage kamailio via kamctl. ETCDIR in the example provided uses /etc, but we can use any directory to accomplish that.

[miconda]

Thanks!