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db9531fe96
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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| .. | ||
| analog | ||
| crypto | ||
| input | ||
| leds | ||
| motor | ||
| timers | ||
| wireless | ||
| 1wire.rst | ||
| bch.rst | ||
| can.rst | ||
| contactless.rst | ||
| eeprom.rst | ||
| efuse.rst | ||
| gpio.rst | ||
| i2s.rst | ||
| index.rst | ||
| ipcc.rst | ||
| loop.rst | ||
| math.rst | ||
| modem.rst | ||
| note.rst | ||
| nullzero.rst | ||
| quadrature.rst | ||
| rc.rst | ||
| rf.rst | ||
| serial.rst | ||
| touchscreen.rst | ||