Shell Script Error Logging

Question

I am trying to set up a simple logging structure in my shell scripts. For this, I would like to define a function "log", which can be called

log "LEVEL" $message

If the message is a variable, to which I previously redirected the outputs of the executed commands. My problem is that I get errors with the following

{message=command 2>&3 1>&3 3>&-} >&3
log "INFO" $message

Is there something wrong there?

TIA

Answer 1

Perhaps you want to:

message=$( command 2>&1 )
log INFO "$message"

Answer 2

I developed a simple multi-level magazine for my shell scripts, you can take a look at usage, inspiration or something else you want.

Answer 3

, (, , , ), logger, Unix — . . .

Answer 4

$() ( ):

{ command; }