The shell does this be using SimpleTextInEx and registering for a CTRL-C keystroke. Then the interrupt from that will set another event that some applications and all long commands are watching for in a polling loop such that things can be halted.
For example, the ls command checks if this second event is triggered between printing each file/directory entry ... If the event was triggered, the command or application can abort itself. -Jaben > -----Original Message----- > From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of > Andrew Fish > Sent: Friday, September 11, 2015 8:38 AM > To: Mang Chia Ho <laytom...@gmail.com> > Cc: edk2-devel@lists.01.org > Subject: Re: [edk2] Application abort event for EFI_ABORTED > > > > On Sep 11, 2015, at 4:49 AM, Mang Chia Ho <laytom...@gmail.com> wrote: > > > > Dear Sir, > > > > Here are some questions about terminating process command. > > As we know, the Nt32Pkg with simulation support terminate the > progressing > > procees when pressing the ESC key. > > > > There is no process termination happening. There are no processes in EFI, > there is only the currently running driver/application and events. > > Thus the shell and application are the same “process” and some amount of > cooperation is required to terminate a running application. > > I don’t know how the shell does this off the top of my head, but you could > grep for SCAN_ESC. > > Thanks, > > Andrew Fish > > > Example: > > A loop script or a application is proceeding... > > Then user press ESC key, and it will be aborted as an EFI_ABORTED status. > > > > For this feature, does someone can give the tips for implementing this > > feature in the custom shell source. > > I have try keyboard hook, but it still can't implement the same feature as > > the Nt32Pkg with simulation. > > keyboard hook just been execute after the process finished. > > But i want to terminate the process when i pressed the ESC key at the > same > > time. > > > > Thanks > > _______________________________________________ > > edk2-devel mailing list > > edk2-devel@lists.01.org > > https://urldefense.proofpoint.com/v2/url?u=https- > 3A__lists.01.org_mailman_listinfo_edk2- > 2Ddevel&d=BQICAg&c=eEvniauFctOgLOKGJOplqw&r=1HnUuXD1wDvw67rut > 5_idw&m=V4KqqvBb7D9S0T7MeM9Wxh0dAvHIpXfJV3VGgUoSaxg&s=xe3zh > ZtMRVH1ArzkthUBURab6WPtG7iTS_vrjd9yhb8&e= > > _______________________________________________ > edk2-devel mailing list > 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
