Question

I have created a wrapper which can execute a given script over SSH with following parameters

sshwrapper.sh <server> <script with path> <username> <password>

Now i want to invoke the following scripts:

start.sh param1 param2 param3 param4

stop.sh param1 param2 param3

using the same wrapper.

Is it possible to have a mechanism where after passing the essential parameters to wrapper script I can post remaining parameters to underlying script?

i.e. I would like to achieve following notation:

Examples:

sshwrapper.sh server start.sh username password param1 param2 param3 param4 

should invoke

start.sh param1 param2 param3 param4 

and

sshwrapper.sh server stop.sh username password param1 param2 param3 

should invoke

stop.sh param1 param2 param3 

in a generic manner.

Answer 1

Use shift and "$@":

SERVER="$1"
SCRIPT="$2"
USERNAME="$3"
PASSWORD="$4"
shift 4

"$SCRIPT" "$@"

Example:

$ cat sshwrapper.sh 
#!/bin/sh

SERVER="$1"
SCRIPT="$2"
USERNAME="$3"
PASSWORD="$4"
shift 4

echo "$SCRIPT" "$@"

$ ./sshwrapper.sh server stop.sh username password param1 param2 param3 
stop.sh param1 param2 param3

Using shift you can remove first arguments from command line and shift the rest:

$ set 1 2 3 4 5
$ echo "$@"
1 2 3 4 5
$ shift 3
$ echo "$@"
4 5

You see here that shift 3 removed first three arguments.