On Mon, Oct 5, 2015 at 8:33 AM, Kweh, Hock Leong <hock.leong.kweh@xxxxxxxxx> wrote: >> -----Original Message----- >> From: Borislav Petkov [mailto:bp@xxxxxxxxx] >> Sent: Saturday, October 03, 2015 5:06 PM >> On Sat, Oct 03, 2015 at 03:18:41AM +0000, Kweh, Hock Leong wrote: >> > > What does the error case look like? A standard glibc message about >> > > write(2) failing? >> > > >> > >> > Any upload fail error like -ENOMEM, -EINVAL, -EIO as well as error >> > returned by efi_capsule_update() API. >> >> All I'm asking is, how does the user know that the upload didn't succeed? >> > > I think it should depend on user app about which API they are using. > If they are using syscall then errors would be returned through write(2). > If they are using libc APIs fwrite, fputs and fprintf, then the errors would > return through those APIs. However, this design is targeting the simple > upload action "cat capsule.bin > /dev/efi_capsule_loader", so the errors > should be returned through cat() or I/O redirection mechanism from > shell terminal. Am I answered your question? > > Btw, I have an out topic question: I do notice you guys wrote in the message > that a function look like write(2) or close(2). What actually the "2" mean there? It's the manpage section. Typing 'man 2 write' will give you the manpage 'WRITE(2)'. Section 2 is syscalls. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
