78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* Copyright (C) 1991, 1992 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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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <hurd.h>
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/* Read NBYTES into BUF from FD. Return the number read or -1. */
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ssize_t
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DEFUN(__read, (fd, buf, nbytes),
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int fd AND PTR buf AND size_t nbytes)
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{
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error_t err;
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char *data;
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size_t nread;
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data = buf;
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_HURD_DPORT_USE
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(fd,
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({
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call:
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err = __io_read (port, &data, &nread, -1, nbytes);
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if (ctty != MACH_PORT_NULL && err == EBACKGROUND)
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{
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struct _hurd_sigstate *ss
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= _hurd_thread_sigstate (__mach_thread_self ());
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if (_hurd_orphaned ||
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__sigismember (SIGTTIN, &ss->blocked) ||
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ss->actions[SIGTTIN].sa_handler == SIG_IGN)
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{
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/* We are orphaned, or are blocking or ignoring SIGTTIN.
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Return EOF instead of stopping. */
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__mutex_unlock (&ss->lock);
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nread = 0;
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err = 0;
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}
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else
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{
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const int restart = ss->actions[SIGTTIN].sa_flags & SA_RESTART;
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__sigaddmember (SIGTTIN, &ss->pending);
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__mutex_unlock (&ss->lock);
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/* XXX deliver pending signals */
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if (restart)
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goto call;
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else
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err = EINTR; /* XXX Is this right? */
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}
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}
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}));
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if (err)
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return __hurd_fail (err);
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if (data != buf)
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{
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memcpy (buf, data, nread);
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__vm_deallocate (__mach_task_self (), data, nread);
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}
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return nread;
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}
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