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                        #!/bin/bash
ps -eo pid,ppid,comm > data
#treeNet[0]=1
depth=0
init=0
tree()
{
#echo $1
let depth=depth+1
treeNet[$depth]=1
for ((i=1;i<depth-1;i++))
do
# echo ${treeNet[$depth]}
if [[ ${treeNet[$i]} -eq 0 ]]
then
echo -n " "
fi
if [[ ${treeNet[$i]} -eq 1 ]]
then
echo -n "¦ "
fi
done
if [[ $init -ne 0 ]]
then
echo -n '¦====='
else
init=1
fi
#let depth=depth+1
# treeNet[depth]=1
#prints process name
echo $(cat data | awk '{ if ($1 == '$1') print $3}' )
#printing branches
local count=0 #amount of child branches
for i in $(cat data | awk ' {if ($2 == '$1' ) print $1 } ')
do
let count=count+1
#echo $i
done
#recursive call tree()
local n=0;
for child in $(cat data | awk ' {if ($2 == '$1' ) print $1 } ')
do
let n=n+1
# echo -n " # child no $n of $count depth $depth debug ${treeNet[1]} ${treeNet[2]} ${treeNet[3]} ${treeNet[4]}"; 
if [[ $n -eq $count ]]
then
#echo -n " last " 
treeNet[$depth]=0
fi
# echo
# let n=n+1
tree $child
done
treeNet[$depth]=0
let depth=depth-1
return 0
}
tree 1
                                 
        
если так сильно хотелось процесы деревцом показывать, могли бы и pstree из psmisc проинсталировать.