From: krishnaLee <sssky307@163.com>
To: "edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Subject: Re: question about uefi shell-current working directory and shell-script
Date: Fri, 21 Sep 2018 08:30:45 +0800 (CST) [thread overview]
Message-ID: <2b9212c6.20aa.165f9893d53.Coremail.sssky307@163.com> (raw)
In-Reply-To: <CB6E33457884FA40993F35157061515CA414086C@FMSMSX103.amr.corp.intel.com>
Carsey,
The shell may not have a file system assigned,
yes but when it find the stript(startup.nsh) file,it has the default file system-->the startup.nsh's file system,
so the default cwd should exist,I think it is strange that start doing script without a default cwd,
currently, without a default cwd,some people have to write ugly script to make a default cwd like this:
if exist fs0:\mytool.efi then
fs0:
goto work_label
if exist fs1:\mytool.efi then
fs1:
goto work_label
if exist fs2:\mytool.efi then
fs2:
goto work_label
if exist fs3:\mytool.efi then
fs3:
goto work_label
...
At 2018-09-20 22:21:58, "Carsey, Jaben" <jaben.carsey@intel.com> wrote:
>When the shell starts, it the prompt "shell>" or something like "fs0:>"... The shell may not have a file system assigned yet so you cannot change directories until you pick a file system.
>
>> -----Original Message-----
>> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
>> krishnaLee
>> Sent: Thursday, September 20, 2018 2:22 AM
>> To: edk2-devel@lists.01.org
>> Subject: [edk2] question about uefi shell-current working directory and shell-
>> script
>> Importance: High
>>
>> Hi,
>> I wonder if it is a bug:
>> I have a usb Fat32-disk,installed with EDK2 shell2.6 or 2.7,
>> the root directory has a startup.nsh,the startup.nsh has only one line:"cd \",
>> I boot my cannolake machine with this usb disk,
>> in the uefi shell,I got a message:"cd: current directory not specified".it means
>> the cwd environment variable was not set when start doing script.
>>
>>
>> I think it may be an error,because the uefi shell can find the startup.nsh,why
>> not set cwd(current working directory) before execute this script,so the cd
>> command works fine.
>> I mention it because I found if I put a uefi application(using efi_shell_protocol
>> to access .\logfile.txt) in this startup.nsh,the uefi application can't access files,
>> because I found the efi_shell_protocol need cwd to work too,such as
>> efi_shell_protocol.OpenFileByName().
>>
>>
>>
>>
>>
>>
>> thank you,
>> krishna
>>
>>
>>
>> _______________________________________________
>> edk2-devel mailing list
>> edk2-devel@lists.01.org
>> https://lists.01.org/mailman/listinfo/edk2-devel
prev parent reply other threads:[~2018-09-21 0:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 9:21 question about uefi shell-current working directory and shell-script krishnaLee
2018-09-20 14:21 ` Carsey, Jaben
2018-09-21 0:30 ` krishnaLee [this message]
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