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Full Discussion: Associative array index question
Top Forums Shell Programming and Scripting Associative array index question Post 303004269 by Corona688 on Thursday 28th of September 2017 05:08:15 PM
Old 09-28-2017
Quote:
Originally Posted by Riker1204
Eval occured to me because when I trace the output ( bash -x ) I get results like this: DN_COUNT[$NAME]=98 or DN_COUNT[$NAME]=1007 and so on. So of course eval then gives me the desired result. I'm not saying your wrong, but I just don't see how the mangling is occuring.
If your code's as you post it, it has to have occurred somewhere, but if it's not, other problems are possible.

Could you have done '$NAME' instead of "$NAME" ? That definitely will not work, and eval definitely would have "fixed" it. Using double quotes is the better answer of course.
Quote:
Also I did write the whole thing from scratch
What is the -d '\0' for?

Quote:
I tend to use the named pipes to feed with the null delimiter because I know C strings are terminated that way which allows for crazy characters
That's a no-op unless your input actually has nulls, and yours doesn't.
Quote:
and the named pipe always avoids subshells which tend to trip me up.
That's a consideration when using read to dump large lists of things into arrays and variables. But you may not need an array at all.

Code:
    make_dir () {
        for i in "/var/lib/ldap" "/var/lib/ldap/accesslog" "/var/tmp/bdb-log" "/etc/openldap/slapd.d" ; do
            if [ -d "$i" ] ; then
                :
            else
                mkdir "$i"
            fi
        done

        if [ $? -eq 0 ] ; then
            printf "%b\n" "Checking directories:                         [ \e[92mOK\e[0m ]"
        else
            printf "%b\n" "Missing directories, unable to create them:   [ \e[91mFAILED\e[0m ]"
        fi
        cp /usr/share/openldap-servers/DB_CONFIG.example /var/lib/ldap/DB_CONFIG
    }

That if [ $? ] doesn't do what you think it does. It's only checking the very last loop, not any of the ones before. You can replace the whole thing with one mkdir call, anyway:

mkdir has -p which will replace most of your function:

Code:
    make_dir () {
        if ! mkdir -p "/var/lib/ldap" "/var/lib/ldap/accesslog" "/var/tmp/bdb-log" "/etc/openldap/slapd.d"
        then
            printf "%b\n" "Missing directories, unable to create them:   [ \e[91mFAILED\e[0m ]"
            return
        fi

        printf "%b\n" "Checking directories:                         [ \e[92mOK\e[0m ]"

        cp /usr/share/openldap-servers/DB_CONFIG.example /var/lib/ldap/DB_CONFIG
    }

Code:
    set_permissions () {
        for i in "/var/lib/ldap" "/var/tmp/bdb-log" "/etc/openldap/slapd.d" ; do
            chown -R ldap:ldap "$i"
        done

        if [ $? -eq 0 ] ; then
            printf "%b\n" "Setting permissions:                          [ \e[92mOK\e[0m ]"
            return 0
        else
            printf "%b\n" "Unable to set permissions:                    [ \e[91mFAILED\e[0m ]"
            return 1
        fi
    }

Same problem here, your $? doesn't do what you think it does, you could have used if directly, and chown can accept multiple names anyway.

If your ldap permissions are changing all the time, it might be a good idea to find what's doing so...

Code:
    set_permissions () {
        if chown -R ldap:ldap "/var/lib/ldap" "/var/tmp/bdb-log" "/etc/openldap/slapd.d"
        then
            printf "%b\n" "Setting permissions:                          [ \e[92mOK\e[0m ]"
            return 0
        else
            printf "%b\n" "Unable to set permissions:                    [ \e[91mFAILED\e[0m ]"
            return 1
        fi
    }

Never, ever use kill -9 as anything but a last resort. You have to ask it to stop, wait, kill it politely, wait, kill it less politely, wait, and if it doesn't die, THEN you can murder it:

Code:
    stop_ldap () {
        pid_number=$(pgrep slapd)
        systemctl stop slapd
        sleep 2
        for SIG in TERM INT HUP KILL # Increasingly severe signals to kill it with
        do
                pgrep slapd >/dev/null || break
                kill -$SIG "$pid_number"
                sleep 1
        done
    }

I'll have to think about the rest.
 

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