execute shell command within sed

[spacewan]

I need some help with sed because im not so used to it.
I want to insert a line into passwd and the input comes from a variable or shell command.

the sed string is or should be:

sed '/\+\:\:\:\:\:\:/ i\echo ${login}::${uid}:${gid}:${fullname}:${homedir}:$sh ell' $pwfile

so my question is, how can i execute shell commands within the sed string/after the i\ ?
would be great if anyone could help me or give me a hint.

regards space

[Lakshmipathi]

you can use an environmental varibale inside sed like

sed s/one/`$PWD`/g sed.txt

google with term "sed environment variable substitution"
sed environment variable substitution - Google Search

HTH

[spacewan]

thx, it's working