Check bash script variable against config file settings.

[JLC17]

I'm trying to extend a script which is working fine as is, but can't make exceptions.

I'd like to be able to create a config file of the usual form:

[section]
key=value

and then be able to pull the keys and values into an array in bash so that I can have a line:

if ($myVar is in <array from file>) then ....

a lot of googling (and this forum) doesn't throw up a straightforward way, which must exist.

Could anyone help ?

[1000]

Does it look similar?
viewtopic.php?p=1950916&sid=d59d1be9a45 ... 5#p1950916

I can't help more because I don't see the script and I don't know where the problem is.

Edit.
Script can also be divided into two parts.
But this has its drawbacks

Code: Select all

RELATIVE_PATH_1="$(dirname "$(readlink -f "$0")")"
echo "$RELATIVE_PATH_1"
##  Load variables
. "$RELATIVE_PATH_1/config.sh"

https://www.linux.com/training-tutorial ... linuxunix/

And above relative path looks safer than relative path with dot " ./config.sh"
Why ?
If you will have in script " . ./config.sh "
And if you do

Code: Select all

cd ..

and you run script then you will see

./config.sh: There is no such file or directory

[JLC17]

Does it look similar?
viewtopic.php?p=1950916&sid=d59d1be9a45 ... 5#p1950916

I can't help more because I don't see the script and I don't know where the problem is.

From first glance, no, but thanks.

I'm working to extend this script: viewtopic.php?t=302364 which as is just switches any connected BT device into a2dp mode. As I note on that thread, it's a little bit crude, as I have a headset I'd rather was in HFP mode.

So I thought if I have a .conf file: mydevices.conf, something like ..

Code: Select all

[Headsets]
mac1=HFP
mac2=a2dp

so that I can have a little bit of code that goes:

Code: Select all

		# search for connected device with AudioSink service
		if [[ `bt-device -i $mac | perl -00 -ne '/.*Trusted: 1.*\n\s*Blocked: 0.*\n\s*Connected: 1\n\s*UUIDs: .*AudioSink.*/ and print "1\n"'` ]]; then
			logger -p info "found mac: $mac"
  			# convert mac to pulse card name
    		pulsecard=`perl -pe 's/:/_/g' <<< "bluez_card.$mac"`

            if [[ $mac [b][i]is HFP[/i][/b] ]]; then
                enable_hfphsp
            else
	    		enable_a2dp
            fi

[1000]

Termy example is very well

Example 1

Code: Select all

		if [[ `bt-device -i $mac | perl -00 -ne '/.*Trusted: 1.*\n\s*Blocked: 0.*\n\s*Connected: 1\n\s*UUIDs: .*AudioSink.*/ and print "1\n"'` ]]; then
			logger -p info "found mac: $mac"
            while read; do
                if [[ "$REPLY" == "$mac" ]]; then
                    PROFILE=$(cut -d"=" -f2 <<< "$REPLY")
                    case  $PROFILE  in
                    HFP)  
			            # convert mac to pulse card name
			            pulsecard=`perl -pe 's/:/_/g' <<< "bluez_card.$mac"`
			            # add something      
                    ;;
                    a2dp)
                        # convert mac to pulse card name
			            pulsecard=`perl -pe 's/:/_/g' <<< "bluez_card.$mac"`
			            enable_a2dp 
                    ;;
                    *)  
                        echo "Bad PROFILE = $PROFILE" 
                    ;;            
                    esac 
                    break
                fi
            done < file
		fi

Example 2

Code: Select all

		if [[ `bt-device -i $mac | perl -00 -ne '/.*Trusted: 1.*\n\s*Blocked: 0.*\n\s*Connected: 1\n\s*UUIDs: .*AudioSink.*/ and print "1\n"'` ]]; then
			logger -p info "found mac: $mac"
            PROFILE=$(grep "$mac" file | cut -d"=" -f2)
            case  $PROFILE  in
                HFP)  
			        # convert mac to pulse card name
			        pulsecard=`perl -pe 's/:/_/g' <<< "bluez_card.$mac"`
			        # add something      
                    ;;
                a2dp)
                    # convert mac to pulse card name
			        pulsecard=`perl -pe 's/:/_/g' <<< "bluez_card.$mac"`
			        enable_a2dp 
                    ;;
                *)  
                    echo "Bad PROFILE = $PROFILE" 
                    ;;            
          esac 
		fi

With Bluetooth commands / devices I can not help because I don't use and I don't know.
https://mobilityarena.com/bluetooth-pro ... avrcp-hfp/

Edit
From above

Code: Select all

 if ($myVar is in <array from file>) then ....

Code: Select all

if grep -q "$myVar" file ; then ...

Edit
I have doubts whether this is a good idea device recognition by mac. Maybe there is a better way?

[Termy]

Damn, I think the only programs I have which use a configuration files are written in Perl. However, this is the sort of approach I'd take in BASH:

Code: Select all

#!/usr/bin/env bash

# You may want to include a method by which to reset the user's config, Such as
# by the user using a flag like `--force-reset` or `--reset-config`.
#
# You can make use of boolean True or False values, which are easy toggles for
# which to program, such as to enable or disable a feature. You could have a
# function like this:
#
#     BoolChk(){
#     	if [ "$1" != "$2" ]; then
#     		printf "ERROR: Invalid value for key '$1'." 1>&2
#     		exit 1
#     	fi
#     }
#
# Then you'd need only run something like:
#
#     BoolChk "$CurrentKey" "$CurrentValue"
#
# Where the variables are obviously applicable.

ConfigFile="$HOME/.config/test.cfg"

# To check the user doesn't use a bunch of nonsense.
ValidKeys=(
	'list'      # Description
	'of'        # of
	'valid'     # Each
	'keys'      # Key
)

# Create the configuration directory if it's not found. (parents, too)
[ -d "${ConfigFile%/*}" ] || mkdir -p "${ConfigFile%/*}"
#                 ^--          dirnames          --^

# I would add a timestamp and program version to the config file's header.
if ! [ -f "$ConfigFile" ]; then
	# Config file is generated here.
	while read; do
		printf '%s\n' "$REPLY"
	done <<-EOF 1> "$ConfigFile"
		# Example configuration file.

		list=Value1
		of=Value2
		valid=Value3
		keys=Value4
	EOF
	#   ^ Tabs are ignored in that here-doc. See bash(1) for more information.
else
	if ! [ -r "$ConfigFile" ]; then
		# I usually use an error function to make this cleaner & more concise.
		printf "ERROR: File '$ConfigFile' unreadable." 1>&2
		exit 1
	fi
fi

# Using an associative array. (A Key=Value system) Note that only unique keys
# can be stored in this array; check for duplicates by other means, if needed.
declare -A Keys
while read; do
	# Ignore comments, because of the header & user's own comments.
	[[ $REPLY == \#* || $REPLY == '' ]] && continue
	#                              ^-- Also ignore empty lines, in-case the
	#                                  user wants to organize their config.

	# Using Input Field Separator of '=', read the Key and Value, using
	# here-string. $REPLY expands to the entire line read by first `read`.
	IFS='=' read Key Value <<< "$REPLY"

	Keys[$Key]=$Value
done < "$ConfigFile"

#--------------------------------------------------Now Do Something with Values

for CurKey in "${!Keys[@]}"; {
	printf "Key '%s' is '%s'.\n" "$CurKey" "${Keys[$CurKey]}"
}

Actually forgot to incorporate the $ValidKeys array, but it's just gone 4am, so I'll leave that to your discretion.

BTW, the above is very efficient, in that it doesn't use any external programs except mkdir(1) from coreutils. Requires at least BASH 4, I believe, but pretty much everyone should have that at this point.

[1000]

Do you seen this "Switch between HSP/HFP and A2DP setting" ?
https://wiki.archlinux.org/index.php/Bl ... DP_setting

Because I seen

But starting from Pulseaudio v. 11.0, it's possible to automatically switch the profile whenever microphone access is requested by the application, but it's disabled by default.

in https://askubuntu.com/questions/354383/ ... 06#1120106