what's the meaning of $@ for /bin/sh 1

[stefanwagner]

I found following line in a script, and don't know what it means:

exec "$FOO_EXEC_CMD" ${1+"$@"}

I guess it will expand to something like "first argument" and a simple echo-hack shows, to all arguments (tested with two).

Shell: /bin/sh
(really invoked: bash)

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[Chacalinc]

$1 is parameter 1
$2 is parameter 1
..

$@ is the complete string of the parameters, example:

ex.sh:

#/bin/bash
echo $1
echo $2
echo $@

# ./ex.sh a b
a
b
a b

Cheers.

Chacal, Inc.

 

[PHV]

${1+"$@"}
If $1 is set then returns "$@" (ie "$1" "$2" ... "$$#") else returns nothing.

In your shell man page have a look to Parameters substitution.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[stefanwagner]

Ah, Thanks, PHV.
That makes sense and earns a star.

Chacalinc: good, but not good enough

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung