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List:       netbsd-users
Subject:    Re: Feed facility/priority to logger(1) via stdin - desirable extension or bad idea?
From:       RVP <rvp () SDF ! ORG>
Date:       2022-10-23 8:14:05
Message-ID: 78fbb063-47e3-4569-8147-5d66e7385cda () SDF ! ORG
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You wrote:

> - Can what I have in mind already be solved (differently or more
> elegantly) with existing tools from the base system?
>
> [...]
>
> Anyway, the motivation behind the idea is for the script case that
> one can save calling a new logger process for each individual line
> to be output.
>

Since a) logger(1) can read input from stdin and b) there are a limited
no. of facilities and levels, you can just start logger(1) processes for
each unique facility.level and keep them around feeding them input.

This work for you?:

```
#!/usr/bin/awk -f

BEGIN {
 	LVL[0] = "emerg"
 	LVL[1] = "alert"
 	LVL[2] = "crit"
 	LVL[3] = "err"
 	LVL[4] = "warning"
 	LVL[5] = "notice"
 	LVL[6] = "info"
 	LVL[7] = "debug"

 	FAC[0] = "kern"
 	FAC[1] = "user"
 	FAC[2] = "mail"
 	FAC[3] = "daemon"
 	FAC[4] = "auth"
 	FAC[5] = "syslog"
 	FAC[6] = "lpr"
 	FAC[7] = "news"
 	FAC[8] = "uucp"
 	FAC[9] = "cron"
 	FAC[10] = "authpriv"
 	FAC[11] = "ftp"
 	FAC[12] = "ntp"
 	FAC[13] = "security"
 	FAC[14] = "console"

 	FAC[16] = "local0"
 	FAC[17] = "local1"
 	FAC[18] = "local2"
 	FAC[19] = "local3"
 	FAC[20] = "local4"
 	FAC[21] = "local5"
 	FAC[22] = "local6"
 	FAC[23] = "local7"

 	DEFPRIO = "user.notice"
}
function getprio(msg, start, len,	i, f, l)
{
 	i = int(substr(msg, start+1, len-2))
 	f = int(i / 8)		# extract facility
 	l = i - (f * 8)		#    "    level
 	return FAC[f] "." LVL[l]
}
function logit(prio, msg)
{
 	proc = "logger -p " prio
 	if (!(proc in PROCS))
 		PROCS[proc] = proc
 	print msg | PROCS[proc]
}
{
 	s = $0
 	if (match(s, "<[[:digit:]]+>")) {
 		prio = getprio(s, RSTART, RLENGTH)
 		s = substr(s, RSTART + RLENGTH)
 	} else
 		prio = DEFPRIO
 	logit(prio, s)
}
END {
 	for (proc in PROCS)
 		close(PROCS[proc])
}
```

Input is of the form:

<134>message line...

as described in the Linux logger(1) man-page (if I've got it right).

-RVP
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