** Changed in: qemu
Status: Unknown => New
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https://bugs.launchpad.net/bugs/2133804
Title:
QEMU does not emulate IOCTL TCGETS2
Status in QEMU:
New
Status in qemu package in Ubuntu:
Confirmed
Status in qemu source package in Jammy:
Confirmed
Status in qemu source package in Noble:
Confirmed
Status in qemu source package in Plucky:
Confirmed
Status in qemu source package in Questing:
Confirmed
Status in qemu source package in Resolute:
Confirmed
Bug description:
In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
implementation of isatty(). It now uses IOCTL TCGETS2 instead of
TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
arm64, ...).
This leads to failures in containers for foreign architectures. E.g. no
console prompt is displayed.
A detailed analysis is contained in LP #2133188.
A proper implementation of the missing IOCTLs will include:
Functions:
in linux-user/syscall.c:
host_to_target_termios2()
target_to_host_termios2()
print_termios2()
Definitions:
in linux-user/syscall.c
#define termios2 host_termios2
in linux-user/syscall_types.h
STRUCT_SPECIAL(termios2)
in linux-user/ioctls.h:
IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
in linux-user/user-internals.h:
void print_termios2(void *arg);
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