mirror of
https://github.com/apache/nuttx.git
synced 2026-08-07 13:37:18 +00:00
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>
33 lines
1.4 KiB
Text
33 lines
1.4 KiB
Text
############################################################################
|
|
# libs/libc/termios/Make.defs
|
|
#
|
|
# SPDX-License-Identifier: Apache-2.0
|
|
#
|
|
# Licensed to the Apache Software Foundation (ASF) under one or more
|
|
# contributor license agreements. See the NOTICE file distributed with
|
|
# this work for additional information regarding copyright ownership. The
|
|
# ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance with the
|
|
# License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
#
|
|
############################################################################
|
|
|
|
# Add the termios C files to the build
|
|
|
|
CSRCS += lib_cfspeed.c lib_cfmakeraw.c lib_isatty.c lib_tcflush.c
|
|
CSRCS += lib_tcdrain.c lib_tcflow.c lib_tcgetattr.c lib_tcsetattr.c
|
|
CSRCS += lib_tcsendbreak.c lib_ttyname.c lib_ttynamer.c
|
|
CSRCS += lib_tcgetpgrp.c lib_tcsetpgrp.c lib_tcgetsid.c
|
|
|
|
# Add the termios directory to the build
|
|
|
|
DEPPATH += --dep-path termios
|
|
VPATH += termios
|