bash adding multiple names Post: 302465872

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Top Forums Shell Programming and Scripting bash adding multiple names Post 302465872 by ctsgnb on Sunday 24th of October 2010 07:25:47 PM

10-24-2010

Registered User

This can easily be adapted to your needs

Code:

#!/usr/bin/bash
LIST=/tmp/list
while [[ "$c" != "2" ]]
do
    echo "1 - Enter a name
    2 - display $LIST
     3 - Exit"
    echo "Make your choice 1/2/3: "
    read c
    case $c in
    1)
        echo "Enter the name :"
        read a
        if ( ! grep ^"$a"$ $LIST >/dev/null 2>&1 )
        then
            echo "$a" >>$LIST
             echo "$a has been added to $LIST"
        else
            echo "filename $a already existing in $LIST, wanna remove it from list y/[n]?"
            read q
            case $q in
                 y|Y) grep -v ^"$a"$ $LIST >$LIST.tmp ; mv $LIST.tmp $LIST ; echo "$a removed from $LIST" ;;
                 n|N) echo "ok $a will stay in $LIST" ;;
                 *) echo "wrong choice, $LIST will stay as is" ;;
            esac
        fi
    ;;
    2) cat $LIST ;;
    3) exit 0 ;;
    *) echo "Wrong choice, try again..." ;;
    esac
done

---------- Post updated at 01:25 AM ---------- Previous update was at 12:54 AM ----------

Could modify the code and add something like and call remove_once "$a"

Code:

remove_once(){
flag=0
while read a
do if [ "$a" = "$1" ]
        then
            if [ $flag -eq 0 ]
            then
                 echo "$a" >>$LIST.tmp
                 let flag++
            fi
        else
             echo "$a" >>$LIST.tmp
        fi
done <$LIST
mv $LIST.tmp $LIST
}

Last edited by ctsgnb; 10-25-2010 at 09:36 AM.. Reason: with indentation ... so Scruti will be happy ;)

ctsgnb

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LEARN ABOUT DEBIAN

rbash

RBASH(1)						      General Commands Manual							  RBASH(1)

NAME

       rbash - restricted bash, see bash(1)

RESTRICTED SHELL

       If  bash  is  started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted.  A restricted shell is
       used to set up an environment more controlled than the standard shell.  It behaves identically to bash with the exception that the  follow-
       ing are disallowed or not performed:

       o      changing directories with cd

       o      setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV

       o      specifying command names containing /

       o      specifying a file name containing a / as an argument to the .  builtin command

       o      specifying a filename containing a slash as an argument to the -p option to the hash builtin command

       o      importing function definitions from the shell environment at startup

       o      parsing the value of SHELLOPTS from the shell environment at startup

       o      redirecting output using the >, >|, <>, >&, &>, and >> redirection operators

       o      using the exec builtin command to replace the shell with another command

       o      adding or deleting builtin commands with the -f and -d options to the enable builtin command

       o      using the enable builtin command to enable disabled shell builtins

       o      specifying the -p option to the command builtin command

       o      turning off restricted mode with set +r or set +o restricted.

       These restrictions are enforced after any startup files are read.

       When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.

SEE ALSO

       bash(1)

GNU Bash-4.0							    2004 Apr 20 							  RBASH(1)

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