Hi, Stefan <stefan-g...@vodafonemail.de> skribis:
> * gnu/packages/virtualization.scm (qemu): Add a snippet to fix a bug in the > do_ioctl_ifconf() function of qemu to make ioclt(…, SIOCGIFCONF, …) work for > emulated 64 bit architectures. > > The sizeof(struct ifreq) is 40 for 64 bit and 32 for 32 bit architectures. > This structure contains a union of other structures, of which struct ifmap > is the biggest for 64 bit architectures. Calling ioclt(…, SIOCGIFCONF, …) > fills a struct sockaddr of that union, and do_ioctl_ifconf() only considered > that struct sockaddr for the size of the union, which has the same size as > struct ifmap on 32 bit architectures. So do_ioctl_ifconf() assumed a wrong > size of 32 for struct ifreq instead of the correct size of 40 on 64 bit > architectures. > > The fix makes do_ioctl_ifconf() handle struct ifmap as the biggest part of > the union, treating struct ifreq with the correct size. > > This fixes (@ (guix build syscalls) network-interface-names) when used in > emulated 64 bit architectures. Applied, thanks! Ludo’.
