if queue $name== "already there" then

Question

is ist Possible, that i check the names in a until queue ?

b=1      
 read -p "Enter how much databases you want to install: " COUNTER
    until [ ${a} -eq ${COUNTER} ]; do

    a=$((a+1))


    echo "What is the name for the $((b++)) database ?"
        read name

    if [ $name == "already there" ]; then
    echo " Please, don't use the same name for a database!"
    exit 1
    else
    :
    fi

I want, that the script exit when the name is already there...

any ideas ?

Is the name a filename, or what? How do you know if it is "already there"? — cdarke, Dec 04 '13 at 09:06
No that was only a synonym for you guys, that you know what i mean — Atlantikdiver, Dec 04 '13 at 09:11

score 1 · Answer 1 · answered Dec 04 '13 at 09:05

1

Use double brackets to enclose your condition or double quote your variable :

if [[ $name == "already there" ]]; then
    echo " Please, don't use the same name for a database!"
    exit 1
else
    #...
fi

or

if [ "$name" == "already there" ]; then
    echo " Please, don't use the same name for a database!"
    exit 1
else
    #...
fi

answered Dec 04 '13 at 09:05

epsilon

2,604
12
21

I will use `if [ "x$name" == "xalready there" ]; then` in case user just presses Enter without giving any value to $name – ray Dec 04 '13 at 09:22

score 1 · Accepted Answer · edited May 23 '17 at 11:49

1

UPDATED

you need to save entered name into array, and check whether newly inserted name is in there or not . array array checking is came from here. Check if an array contains a value

#!/bin/bash

has_element ()
{
  local e
  for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
  return 1
}

b=1
read -p "Enter how much databases you want to install: " COUNTER

let -a CONTAINER

a=0
until [ ${a} == ${COUNTER} ]
do
    a=$((a+1))

    echo "What is the name for the $((b++)) database ?"
    read name


    if has_element "$name" "${CONTAINER[@]}"
    then
        echo "already has"
        exit
    fi

    CONTAINER+=($name)

done

Orig. Answer

I think you're almost there. modified some error.

b=1
read -p "Enter how much databases you want to install: " COUNTER

a=0
until [ ${a} == ${COUNTER} ]
do
    a=$((a+1))

    echo "What is the name for the $((b++)) database ?"
    read name

    if [ "$name" == "already there" ]
    then
        echo " Please, don't use the same name for a database!"
        exit 1
    else
        echo "stay..."
    fi

done

edited May 23 '17 at 11:49

Community

1
1

answered Dec 04 '13 at 09:08

Jason Heo

9,036
2
30
50

That "already there" was only a synonym for you that you know what i mean. – Atlantikdiver Dec 04 '13 at 09:13
@user3057030 So, my script is still not working? What is real value? could you give us same value? – Jason Heo Dec 04 '13 at 09:23
it is running in an until queue so the variable "name" gets everytime a new value.. – Atlantikdiver Dec 04 '13 at 09:26
For example, when i tipp in in the first time "CHERRY" for the name and the second time "APPLE" and than for the third time again "CHERRY" that the script exit 1 – Atlantikdiver Dec 04 '13 at 09:31
@user3057030 Aha~ I got it. but, currently I'm working my job. wait a minute or somebody – Jason Heo Dec 04 '13 at 09:32
@user3057030 you're very welcome. I have also googled. I learned alot. thanks. – Jason Heo Dec 04 '13 at 10:01
You probably want your shebang line to be `#!/bin/bash`, or your script will break on distributions where `/bin/sh` is not Bash (e.g. Ubuntu, where it's Dash). – Daniel Dec 04 '13 at 10:21

if queue $name== "already there" then

2 Answers2

UPDATED

Orig. Answer