Vista - Using @ as argument

I'm writing a simple PS script to automate backup. The files are archived
using RAR (no wordwrap, all on the same line):

rar a -r -m1 -x@xxxxxx:\Tools\Scripts\backup_exclude.txt d:\Backup\epiajob
$dayofweek.rar @c:\Tools\Scripts\backup_include.txt

When running from cmd.exe, it works as intended. But running it inside the
PS script, it gives: "Unrecognized token in source text.". I guess the
parser don't like the @.

How can I fix this?

Thx in advance,
Anders.

Anders wrote:Can you paste the exact error? It will usually tell you the exact character
where the problem is.

--

Hal Rottenberg
Blog: http://halr9000.com
Webmaster, Psi (http://psi-im.org)
Co-host, PowerScripting Podcast (http://powerscripting.net)

Hal Rottenberg <hal@xxxxxx> wrote in
news:Oe$$WH4WIHA.1132@xxxxxx:
Unrecognized token in source text.
At C:\Tools\epia_pscp_backup.ps1:18 char:85
+ rar a -r -m1 -x@xxxxxx:\Tools\Scripts\backup_exclude.txt d:\Backup\epiajob
$dayofweek.rar @ <<<< c:\Tools\Scripts\backup_include.txt

You can't use the "@" sign unless you intend to pass an array, hashtable
or a here-string.
It's a special PowerShell character with special meaning, much like the "$"
symbol.

To compress a file with RAR try this:

$winrar = "$env:ProgramFiles\WinRAR\WinRAR.exe"
& $winrar a -m1 "d:\Backup\epiajob\$dayofweek.rar" "C:\Tools\Scripts\backup_exclude.txt"



-----
Shay Levi
$cript Fanatic
http://scriptolog.blogspot.com
@c:\Tools\Scripts\backup_include.txt

If you ever need to pass an argument that starts with an @, you'll need to
escape it using backtick. e.g.

PS>t @c:\Tools\Scripts\backup_include.t
Unrecognized token in source text.
At line:1 char:3
+ t <<<< @c:\Tools\Scripts\backup_include.t
PS>t `@c:\Tools\Scripts\backup_include.t
args = @c:\Tools\Scripts\backup_include.t

--
Jeffrey P. Snover[MSFT]
Partner Architect, Windows Server
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.

Duh

-----
Shay Levi
$cript Fanatic
http://scriptolog.blogspot.com
PS>> t @c:\Tools\Scripts\backup_include.t
PS>>PS>> t `@c:\Tools\Scripts\backup_include.t
PS>>

"Jeffrey Snover[MSFT]" <jsnover@xxxxxx> wrote in
news:F0569015-872B-4D85-BCEC-8B385494074E@xxxxxx:

Thx, that did the trick :-)

Regards,
Anders

Keep in mind that arguments are passed to external commands as an array of
strings. If one of the arguments passed contains a character that has
special meaning to Powershell then you will have to quote the string.
The command works in CMD.EXE because CMD only recognizes the space character
as a separator between arguments. If you needed to pass an argument that
contained a space you would place double quotes around it.
However, in Powershell there are several more more characters that you must
be aware of, such as @, $, (, and ). There may be others. You may enclose
the string argument in single or double quotes, but remember that a double
quoted string will still need to use tic marks to escape the character.
(e.g. `@, `$, `n, etc...) A single quoted string will have its content
passes as literal.

"Anders" <no@xxxxxx> wrote in message
news:Xns9A2BB17CDA098nospamforme@xxxxxx

"Jeffrey Snover[MSFT]" <jsnover@xxxxxx> wrote in message
news:F0569015-872B-4D85-BCEC-8B385494074E@xxxxxxHmm I wonder if PoSh could benefit from a utility method like
[regex]::escape() escape that it would escape arguments?

--
Keith