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Re: extending PATH on Windows?

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From eryk sun <eryksun@gmail.com>
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Subject Re: extending PATH on Windows?
Date Wed, 17 Feb 2016 13:02:21 -0600
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On Wed, Feb 17, 2016 at 11:49 AM, Ulli Horlacher
<framstag@rus.uni-stuttgart.de> wrote:
> At startup cmd.exe runs a script which is defined by the registry variable
> AutoRun in "HKCU\Software\Microsoft\Command Processor"
>
> I set this variable with:
>
>   rc = "HKCU\Software\Microsoft\Command Processor"
>   ar = "%USERPROFILE%\Desktop\autorun.cmd"
>   system('reg add "%s" /v AutoRun /d "%s"' % (rc,ar))
>
> and write into autorun.cmd:
>
> set PATH=%PATH%;%USERPROFILE%\Desktop

The AutoRun command (it's a command line, not a script path) gets run
for every instance of cmd.exe, unless cmd is started with the /D
option. This includes the CRT's system() function. Your batch file
needs to set a sentinel variable such as YOUR_APP_AUTORUN that, if
set, makes the batch file exit without extending PATH if it was
already done.

Also, you can't just overwrite a user's AutoRun command like that. If
a command currently exists, you have to concatenate your command with
the existing command using parentheses and the "&" operator, e.g.
(previous_command) & (your_command). Use winreg for this.

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Thread

extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-16 08:30 +0000
  Re: extending PATH on Windows? Thorsten Kampe <thorsten@thorstenkampe.de> - 2016-02-16 13:19 +0100
    Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-16 12:38 +0000
      Re: extending PATH on Windows? Thorsten Kampe <thorsten@thorstenkampe.de> - 2016-02-16 14:38 +0100
      Re: extending PATH on Windows? Thorsten Kampe <thorsten@thorstenkampe.de> - 2016-02-16 14:43 +0100
        Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-17 17:49 +0000
          Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-17 13:02 -0600
            Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-17 20:29 +0000
              Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-17 15:17 -0600
                Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-17 22:37 +0000
                Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-18 16:55 +0000
                Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-19 12:07 -0600
          Re: extending PATH on Windows? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-02-17 19:53 -0500
            Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-18 16:24 +0000
              Re: extending PATH on Windows? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-02-18 21:57 -0500
                Re: extending PATH on Windows? pyotr filipivich <phamp@mindspring.com> - 2016-02-18 19:39 -0800
                Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-19 10:42 +0000
                Re: extending PATH on Windows? Chris Angelico <rosuav@gmail.com> - 2016-02-19 21:48 +1100
                Re: extending PATH on Windows? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-02-19 07:45 -0500
                Re: extending PATH on Windows? Gisle Vanem <gvanem@yahoo.no> - 2016-02-19 15:18 +0100
                Re: extending PATH on Windows? pyotr filipivich <phamp@mindspring.com> - 2016-02-19 09:04 -0800
                Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-19 12:04 -0600
                Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-19 12:42 -0600
                Re: extending PATH on Windows? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-02-19 19:57 -0500
                Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-20 07:31 -0600
          Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-18 06:54 -0600
            Re: extending PATH on Windows? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-02-18 16:50 +0000
  Re: extending PATH on Windows? eryk sun <eryksun@gmail.com> - 2016-02-16 07:17 -0600

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