Bash command as variable -

i trying store start of sed command inside variable this:

sedcmd="sed -i '' "

later execute command so:

   $sedcmd s/$orig_pkg/$package_name/g $f

and doesn't work. running script bash -x, can see being expanded like:

   sed -i ''\'''\'''

what correct way express this?

define shell function:

mysed () {     sed -i "" "$@" }

and call this:

$ mysed s/$orig_pkg/$package_name/g $f

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