Thanks for correction. FileDevicePath(devicepath,L"XYZ\\Par\\Chld\\filename.efi ");
Amit ________________________________ From: af...@apple.com <af...@apple.com> on behalf of Andrew Fish <af...@apple.com> Sent: Friday, April 7, 2017 8:12:46 PM To: Amit kumar Cc: Carsey, Jaben; edk2-devel@lists.01.org Subject: Re: [edk2] How to get fs index from controller handle. On Apr 7, 2017, at 3:40 AM, Amit kumar <akami...@hotmail.com<mailto:akami...@hotmail.com>> wrote: Sorry my bad, actually it works instead of FileDevicePath(devicepath,L"XYZ\Par\Chld\filename.efi "); i have to use FileDevicePath(devicepath,L"XYZ\\\Par\\\Chld\\filename.efi "); I think it is 2 \\ not 3 and you have a space at the end of the string. Thanks, Andrew Fish Thanks for your help and support. Amit ________________________________ From: edk2-devel <edk2-devel-boun...@lists.01.org<mailto:edk2-devel-boun...@lists.01.org>> on behalf of Amit kumar <akami...@hotmail.com<mailto:akami...@hotmail.com>> Sent: Friday, April 7, 2017 3:46:37 PM To: Carsey, Jaben; af...@apple.com<mailto:af...@apple.com> Cc: edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org> Subject: Re: [edk2] How to get fs index from controller handle. Andrew, Jaben Thanks for your suggestions. I have one more query , i have a handle that contains a devicepath and i have a file say filename.efi wich is inside directory structure. say XYZ\Par\Chld\filename.efi NewDevPath =FileDevicePath(devicepath,L"XYZ\Par\Chld\filename.efi "); and then i do gBS->LoadImage ( FALSE, ImageHandle, NewDevPath, NULL, 0, &NewHandle ); which returns me Status = Not Found; But when i place the filename.efi in volume root NewDevPath =FileDevicePath(devicepath,L"filename.efi "); LoadImage succeeds. Can some one tell me how to deal with directories while generating the devicepath for a file inside a directory. Amit ________________________________ From: Carsey, Jaben <jaben.car...@intel.com<mailto:jaben.car...@intel.com>> Sent: Friday, April 7, 2017 2:22:15 AM To: af...@apple.com<mailto:af...@apple.com> Cc: Amit kumar; edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org> Subject: RE: [edk2] How to get fs index from controller handle. Andrew, I was assuming not wanting ShellExecute() might extend to the rest of the shell. If the shell is in use, that can definitely help. While those 2 APIs do exist in theory, there is a single one that does all I think: GetDevicePathFromFilePath. -Jaben From: af...@apple.com<mailto:af...@apple.com> [mailto:af...@apple.com] Sent: Thursday, April 06, 2017 1:49 PM To: Carsey, Jaben <jaben.car...@intel.com<mailto:jaben.car...@intel.com>> Cc: Amit kumar <akami...@hotmail.com<mailto:akami...@hotmail.com>>; edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org> Subject: Re: [edk2] How to get fs index from controller handle. Importance: High On Apr 6, 2017, at 1:30 PM, Carsey, Jaben <jaben.car...@intel.com<mailto:jaben.car...@intel.com><mailto:jaben.car...@intel.com>> wrote: That's the way to do it. the hard work is around finding the DevicePath for the application you want to run to pass to LoadImage. Jaben, It was easy in the old days..... DevPath = gSE2->NameToPath (ShellPathName); gSE2->GetFsName (DevPath, FALSE, & ShellPathName); Maybe we should default EFI_SHELL_ENVIRONMENT2 to on :)? Half joking. I used those 2 APIs in the past to glue in shell volume names to a really simplistic C lib. Also if you have the File System Handle and path you can use the DevicePathLib. /** Allocates a device path for a file and appends it to an existing device path. If Device is a valid device handle that contains a device path protocol, then a device path for the file specified by FileName is allocated and appended to the device path associated with the handle Device. The allocated device path is returned. If Device is NULL or Device is a handle that does not support the device path protocol, then a device path containing a single device path node for the file specified by FileName is allocated and returned. The memory for the new device path is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated. If FileName is NULL, then ASSERT(). If FileName is not aligned on a 16-bit boundary, then ASSERT(). @param Device A pointer to a device handle. This parameter is optional and may be NULL. @param FileName A pointer to a Null-terminated Unicode string. @return The allocated device path. **/ EFI_DEVICE_PATH_PROTOCOL * EFIAPI FileDevicePath ( IN EFI_HANDLE Device, OPTIONAL IN CONST CHAR16 *FileName ); Thanks, Andrew Fish -----Original Message----- From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Amit kumar Sent: Thursday, April 06, 2017 9:45 AM To: Andrew Fish <af...@apple.com<mailto:af...@apple.com><mailto:af...@apple.com>> Cc: edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org><mailto:edk2-devel@lists.01.org> Subject: Re: [edk2] How to get fs index from controller handle. Importance: High Hi, Can i use gbs->loadimage() and gbs->startimage() to load an efi application and execute it. Suppose i have a app1.efi and from app1.efi i want to execute app2.efi. Or is there some other way to do it ? Not considering ShellExecute(); Amit ________________________________ From: af...@apple.com<mailto:af...@apple.com><mailto:af...@apple.com> <af...@apple.com<mailto:af...@apple.com><mailto:af...@apple.com>> on behalf of Andrew Fish <af...@apple.com<mailto:af...@apple.com><mailto:af...@apple.com>> Sent: Thursday, April 6, 2017 4:39:22 PM To: Amit kumar Cc: edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org><mailto:edk2-devel@lists.01.org> Subject: Re: [edk2] How to get fs index from controller handle. On Apr 6, 2017, at 3:30 AM, Amit kumar <akami...@hotmail.com<mailto:akami...@hotmail.com><mailto:akami...@hotmail.com><mailto:akami...@hotmail.com>> wrote: Hi, I want to get the fs index from the controller handle. e.g In map command i see my controller is mapped to fs10. So i there any API i can use in my code to get the fs index( which is 10 as in example) from the controller handle. Amit, It is important to remember that fs0:, and the other device names are a Shell concept and not an EFI concept. So they only exist in the context of the shell. I took a quick look and I did not see an easy way to do this with the current Shell APIs. In the older Shell you could use this protocol EfiShellEnvironment2 Protocol has a function that converts a EFI_DEVICE_PATH_PROTOCOL (would be on your controller handle) to a CHAR16. Thus you can get the volume name the Shell would display to the user. I don't the index exists as a concept. So EFI_SHELL_ENVIRONMENT2.GetFsName() and EFI_SHELL_ENVIRONMENT2.GetFsDevicepath() are the closest thing I can think of. https://github.com/tianocore/edk2/blob/master/ShellPkg/Include/Protocol/ EfiShellEnvironment2.h#L812 The only problem with that is EfiShellEnvironment2 is not produced by the Shell by default. ## This flag is used to control the protocols produced by the shell # If TRUE the shell will produce EFI_SHELL_ENVIRONMENT2 and EFI_SHELL_INTERFACE gEfiShellPkgTokenSpaceGuid.PcdShellSupportOldProtocols|FALSE|BOOLEAN |0x00000002 I've use the EFI_SHELL_ENVIRONMENT2 in the past to enable a non Shell application to print out volume names that match the map command of the shell. Hopefully some one knows how to do this in the modern Shell? Thanks, Andrew Fish Regards Amit _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org><mailto:edk2-devel@lists.01.org><mailto:edk2-devel@lists.01.org> https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org><mailto:edk2-devel@lists.01.org> https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org> https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
