[SCM] Hurd branch, master, updated. v0.9.git20201127-5-gb9fe5b6

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit b9fe5b6eadc913ead80531905aeafa51ed0d4ccd
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Dec 27 00:58:17 2020 +0100

    Add proc_waitid
    
    proc_wait assumes that the caller always wants WEXITED, but waitid()
    does not. The new proc_waitid RPC requires the caller to specify at
    least one of WEXITED, WSTOPPED, or WCONTINUED.
    
    * hurd/process.defs (proc_waitid): New RPC.
    * hurd/process_reply.defs (proc_waitid): New RPC.
    * hurd/process_request.defs (proc_waitid): New RPC.
    * proc/proc.h (struct proc): Add p_continued field.
    * proc/wait.c (WCONTINUED, WEXITED): Define if not already defined.
    (S_proc_wait): Rename implementation to S_proc_waitid, and modify to
    stop assuming WEXITED. Add support for WCONTINUED.
    (S_proc_wait): Reimplement by just calling S_proc_waitid with an
    additional WEXITED.
    (proc_mark_stop): Clear p_continued.
    (proc_mark_cont): Set p_continued, clear p_waited, wake any waiting
    parent.

commit d7964b08211f5221e73400ed36093d44f9455fff
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Dec 27 00:55:42 2020 +0100

    proc: Also send SIGCHLD on child restart
    
    * proc/wait.c (S_proc_mark_cont): When parent has not set nostopcld,
    send a SIGCHLD with CLD_CONTINUED.

commit a14bade6c6c17df9c0877c30e4903a1e2d8175fd
Author: Jeremie Koenig <jk@jk.fr.eu.org>
Date:   Sun Dec 27 00:53:20 2020 +0100

    proc: send signals with POSIX sigcodes
    
    * proc/stubs.c (send_signal): Add a sigcode argument.
    * proc/proc.h (send_signal): Declare the sigcode argument.
    * proc/pgrp.c (leave_pgrp): Specify a null sigcode.
    * proc/wait.c (alert_parent): Use CLD_EXITED for SIGCHLD on exit.
    (S_proc_mark_stop): Use CLD_STOPPED for SIGCHLD on stop.

-----------------------------------------------------------------------

Summary of changes:
 hurd/process.defs         | 17 +++++++++++++
 hurd/process_reply.defs   |  2 ++
 hurd/process_request.defs |  2 ++
 proc/pgrp.c               |  4 +--
 proc/proc.h               |  3 ++-
 proc/stubs.c              |  3 ++-
 proc/wait.c               | 65 +++++++++++++++++++++++++++++++++++++----------
 7 files changed, 79 insertions(+), 17 deletions(-)


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