Re: pushd, popd and dirs of different bash processes communicate by an external file

[Steven W. Orr]

On 6/9/2011 11:42 PM, Peng Yu wrote:
> Hi,
>
> I'm wondering if there is a way that different bash processes share
> the same stack. One way of doing so is to use a file to save the
> stack. It is not difficult to implement this function myself, but I'm
> just wondering if there is any simpler solution or anybody has done it
> already. Thanks!


.dirstack_fns:


#################################################
# directory stack aliases and functions
#
# pd is just pushd and pd[2-9] do pushd's with the numeric value
# ds is dirs, the short dir stack listing
# dl is the long dirstack listing with directory numbers
# sd saves the dirstack in ~/.dirstack for use in another shell or a login
# gd gets the saved directory stack
# dset assigns the current directory to its argument (variable name)
#
# future versions of pushd will label the window with the current
# directory


make_aliases()
{
    typeset -i ii=1

    alias pd=pushd
    for ((ii=1; ii < 20; ii++))
    do
        alias pd${ii}="pushd +${ii}"
    done
    alias ds=dirs
    alias dl='dirs -v'
    alias sd="dirs -l > ~/.bash_dirs"
}

make_aliases
unset -f make_aliases

function dset() {
    eval $1=$PWD
}

function gd() {
    local readlist
    declare -a dir_list
    declare -i dir_cnt
    declare -i ii
    local dir

    if [ ! -e ~/.bash_dirs ]
    then
        echo "~/.bash_dirs does not exist"
        return
    fi
    read readlist < ~/.bash_dirs
    set ${readlist}
    let dir_cnt=$#-1

    let ii=0
    while [ ${ii} -le ${dir_cnt} ]
    do
        dir_list[${ii}]=$1
        shift
        let ii+=1
    done
    dir=${dir_list[${dir_cnt}]}

    if [ -d "${dir}" ]
    then
        dirs -c         # Clear the stack before reassigning.
        builtin cd ${dir}
    fi
    let dir_cnt-=1
    while [ ${dir_cnt} -ge 0 ]
    do
        dir=${dir_list[${dir_cnt}]}
        if [ -d "${dir}" ]
        then
            builtin pushd ${dir} >/dev/null
        fi
        let dir_cnt-=1
    done
}


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