1999-09-18 Roland McGrath <roland@baalperazim.frob.com>
* sysdeps/mach/hurd/wait4.c (__wait4): When proc_wait returns EAGAIN, return zero to indicate no children died yet (assuming WNOHANG). * sysdeps/mach/hurd/setsid.c: #include <hurd/fd.h>. 1999-09-17 Roland McGrath <roland@baalperazim.frob.com> * hurd/port2fd.c (_hurd_port2fd): Never change CTTYID port. * sysdeps/mach/hurd/setsid.c (__setsid): Fix return type -> pid_t. Return _hurd_pgrp instead of 0.
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Roland McGrath
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14
ChangeLog
14
ChangeLog
@ -1,3 +1,17 @@
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1999-09-18 Roland McGrath <roland@baalperazim.frob.com>
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* sysdeps/mach/hurd/wait4.c (__wait4): When proc_wait returns EAGAIN,
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return zero to indicate no children died yet (assuming WNOHANG).
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* sysdeps/mach/hurd/setsid.c: #include <hurd/fd.h>.
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1999-09-17 Roland McGrath <roland@baalperazim.frob.com>
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* hurd/port2fd.c (_hurd_port2fd): Never change CTTYID port.
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* sysdeps/mach/hurd/setsid.c (__setsid): Fix return type -> pid_t.
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Return _hurd_pgrp instead of 0.
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1999-09-19 Roland McGrath <roland@baalperazim.frob.com>
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* sysdeps/mach/hurd/brk.c (_hurd_set_brk): Deallocate and reallocate
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@ -27,46 +27,34 @@
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D should be locked, and will not be unlocked. */
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void
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_hurd_port2fd (struct hurd_fd *d, io_t port, int flags)
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_hurd_port2fd (struct hurd_fd *d, io_t dport, int flags)
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{
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io_t ctty;
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mach_port_t cttyid;
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int is_ctty = !(flags & O_IGNORE_CTTY) && ! __term_getctty (port, &cttyid);
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io_t ctty = MACH_PORT_NULL;
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if (is_ctty)
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{
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/* This port is capable of being a controlling tty.
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Is it ours? */
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struct hurd_port *const id = &_hurd_ports[INIT_PORT_CTTYID];
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__spin_lock (&id->lock);
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if (id->port == MACH_PORT_NULL)
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/* We have no controlling tty, so make this one it. */
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_hurd_port_locked_set (id, cttyid);
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else
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{
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if (cttyid != id->port)
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/* We have a controlling tty and this is not it. */
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is_ctty = 0;
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/* Either we don't want CTTYID, or ID->port already is it.
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So we don't need to change ID->port, and we can release
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the reference to CTTYID. */
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__spin_unlock (&id->lock);
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__mach_port_deallocate (__mach_task_self (), cttyid);
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}
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}
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if (!is_ctty || __term_open_ctty (port, _hurd_pid, _hurd_pgrp, &ctty) != 0)
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/* XXX if IS_CTTY, then this port is our ctty, but we are
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not doing ctty style i/o because term_become_ctty barfed.
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What to do? */
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/* No ctty magic happening here. */
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ctty = MACH_PORT_NULL;
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if (!(flags & O_IGNORE_CTTY))
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__USEPORT (CTTYID,
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({
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if (port != MACH_PORT_NULL && /* Do we have a ctty? */
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! __term_getctty (dport, &cttyid)) /* Could this be it? */
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{
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__mach_port_deallocate (__mach_task_self (), cttyid);
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/* This port is capable of being a controlling tty.
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Is it ours? */
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if (cttyid == port)
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__term_open_ctty (dport, _hurd_pid, _hurd_pgrp, &ctty);
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/* XXX if this port is our ctty, but we are not doing
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ctty style i/o because term_become_ctty barfed,
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what to do? */
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}
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0;
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}));
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/* Install PORT in the descriptor cell, leaving it locked. */
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{
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mach_port_t old
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= _hurd_userlink_clear (&d->port.users) ? d->port.port : MACH_PORT_NULL;
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d->port.port = port;
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d->port.port = dport;
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d->flags = 0;
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if (old != MACH_PORT_NULL)
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__mach_port_deallocate (__mach_task_self (), old);
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
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/* Copyright (C) 1993,94,95,97,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -20,38 +20,51 @@
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/port.h>
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#include <hurd/fd.h>
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/* Create a new session with the calling process as its leader.
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The process group IDs of the session and the calling process
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are set to the process ID of the calling process, which is returned. */
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int
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__setsid ()
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pid_t
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__setsid (void)
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{
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error_t err;
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unsigned int stamp;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_dtable_lock);
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stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */
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/* Tell the proc server we want to start a new session. */
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if (err = __USEPORT (PROC, __proc_setsid (port)))
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return __hurd_fail (err);
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err = __USEPORT (PROC, __proc_setsid (port));
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if (!err)
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/* Punt our current ctty. We hold the dtable lock from before the
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proc_setsid call through clearing the cttyid port so that we can be
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sure that it's been cleared by the time the signal thread attempts
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to re-ctty the dtable in response to the pgrp change notification. */
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_hurd_port_set (&_hurd_ports[INIT_PORT_CTTYID], MACH_PORT_NULL);
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/* Punt our current ctty. */
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_hurd_setcttyid (MACH_PORT_NULL);
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__mutex_unlock (&_hurd_dtable_lock);
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/* Synchronize with the signal thread to make sure we have
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received and processed proc_newids before returning to the user. */
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while (_hurd_pids_changed_stamp == stamp)
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{
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if (!err)
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/* Synchronize with the signal thread to make sure we have
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received and processed proc_newids before returning to the user.
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This both updates _hurd_pgrp, and
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*/
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while (_hurd_pids_changed_stamp == stamp)
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{
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#ifdef noteven
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/* XXX we have no need for a mutex, but cthreads demands one. */
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__condition_wait (&_hurd_pids_changed_sync, NULL);
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/* XXX we have no need for a mutex, but cthreads demands one. */
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__condition_wait (&_hurd_pids_changed_sync, NULL);
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#else
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__swtch_pri(0);
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__swtch_pri (0);
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#endif
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}
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}
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return 0;
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HURD_CRITICAL_END;
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return err ? __hurd_fail (err) : _hurd_pgrp;
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}
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weak_alias (__setsid, setsid)
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
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/* Copyright (C) 1993,94,95,96,97,98,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -35,8 +35,21 @@ __wait4 (pid_t pid, __WAIT_STATUS_DEFN stat_loc, int options,
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err = __USEPORT (PROC, __proc_wait (port, pid, options,
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stat_loc ?: &dummy, &sigcode,
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usage ?: &ignored, &dead));
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return err ? (pid_t) __hurd_fail (err) : dead;
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switch (err)
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{
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case 0: /* Got a child. */
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return dead;
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case EAGAIN:
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/* The RPC returns this error when the WNOHANG flag is set and no
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selected children are dead (but some are living). In that
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situation, our return value is zero. (The RPC can't return zero
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for DEAD without also returning some garbage for the other out
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parameters, so an error return is much more natural here. Hence
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the difference between the RPC and the POSIX.1 interface. */
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return (pid_t) 0;
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default:
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return (pid_t) __hurd_fail (err);
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}
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}
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weak_alias (__wait4, wait4)
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