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95063bde15
NuttX has no real session/process-group abstraction, so the TTY layer collapses the foreground process group onto the single dev->pid field (pgrp == pid, one member per group). Extend the controlling-terminal support so portable software (e.g. dropbear, socat) that relies on job-control primitives works without losing the existing NuttX-specific behaviour. Driver (serial.c, pty.c): - TIOCSCTTY now accepts a flag: arg > 0 keeps the historical "target PID in arg" semantics (NSH registers the foreground command it just spawned), while arg == 0 selects the calling task via nxsched_getpid(), matching the POSIX flag convention used by dropbear/socat/apue. This preserves all existing callers and makes the previously-dead arg==0 path deliver SIGINT correctly. - Add TIOCGPGRP/TIOCGSID (return dev->pid) and TIOCSPGRP (set it). - pty.c gains the same handlers against pd_pid and includes nuttx/sched.h for nxsched_getpid(). ioctl numbers (tioctl.h): TIOCGPGRP/TIOCSPGRP/TIOCGSID at 0x37-0x39. libc wrappers: - termios: tcgetpgrp(), tcsetpgrp(), tcgetsid() over the new ioctls. - unistd: setsid()/getsid()/setpgid() stubs consistent with the existing getpgrp()/getpgid() single-session model (sid == pgid == pid; setpgid only succeeds for pgid == pid). Declare the new prototypes in unistd.h (tcgetsid was already in termios.h) and register all sources in the Make.defs/CMakeLists. Group-broadcast signalling (kill(-pgrp)) remains unsupported, so tty signals still target the single dev->pid; a real session/process group model is left as a follow-up. Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> |
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| .. | ||
| CMakeLists.txt | ||
| Kconfig | ||
| Kconfig-16550 | ||
| Kconfig-cmsdk | ||
| Kconfig-lpuart | ||
| Kconfig-pci | ||
| Kconfig-pl011 | ||
| Kconfig-sci | ||
| Kconfig-uart | ||
| Kconfig-usart | ||
| Kconfig-xlnxps | ||
| Make.defs | ||
| ptmx.c | ||
| pty.c | ||
| pty.h | ||
| serial.c | ||
| serial_cmsdk.c | ||
| serial_dma.c | ||
| serial_gdbstub.c | ||
| serial_io.c | ||
| uart_16550.c | ||
| uart_bth4.c | ||
| uart_bth5.c | ||
| uart_hostfs.c | ||
| uart_pci_16550.c | ||
| uart_pl011.c | ||
| uart_ram.c | ||
| uart_rpmsg.c | ||
| uart_rpmsg_raw.c | ||
| uart_xlnx_ps.c | ||