How to write a bash script to execute a different command with additional arguments?

When called as my_cmd -a -b ... c,

the script will finally call program a with addition parameters:

a -additional -a -b ... c

How can I write such a bash开发者_Python百科 script?

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a -additional "$@" [pad to 30 characters]

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Given that the additional arguments come immediately after the command, it is trivial:

exec a -additional "$@"

The exec is optional.

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If the command's name "a" has to be also taken from the my_cmd's parameters:

"${1:1}" -additional "$@"