Mercurial > illumos > illumos-gate
view usr/src/cmd/mdb/common/mdb/mdb_logio.c @ 14167:7ac6fb740bcf
3946 ::gcore (fix sparc build)
author | Christopher Siden <chris.siden@delphix.com> |
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date | Tue, 27 Aug 2013 10:51:34 -0800 |
parents | 68f95e015346 |
children |
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/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1997-2001 by Sun Microsystems, Inc. * All rights reserved. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * Log I/O Backend * * This backend provides the ability to form a T in an iob's output routine. * We use this capability to provide interactive session logging. We create * a log i/o and give it a pointer to another i/o backend representing the * log file, and then stack this on top of the existing stdio i/o backend. * As each write occurs, the log i/o writes to the log file, and also passes * the write request along to io->io_next. */ #include <mdb/mdb_modapi.h> #include <mdb/mdb_err.h> #include <mdb/mdb_io_impl.h> #include <mdb/mdb.h> static ssize_t logio_read(mdb_io_t *io, void *buf, size_t nbytes) { mdb_io_t *logio = io->io_data; ssize_t rbytes; if (io->io_next != NULL) { rbytes = IOP_READ(io->io_next, buf, nbytes); if (rbytes > 0) { (void) IOP_WRITE(logio, mdb.m_prompt, mdb.m_promptlen); (void) IOP_WRITE(logio, buf, rbytes); } return (rbytes); } return (-1); } static ssize_t logio_write(mdb_io_t *io, const void *buf, size_t nbytes) { mdb_io_t *logio = io->io_data; ssize_t wbytes; if (io->io_next != NULL) { wbytes = IOP_WRITE(io->io_next, buf, nbytes); if (wbytes > 0) (void) IOP_WRITE(logio, buf, wbytes); return (wbytes); } return (-1); } static void logio_close(mdb_io_t *io) { mdb_io_rele(io->io_data); } static const char * logio_name(mdb_io_t *io) { if (io->io_next != NULL) return (IOP_NAME(io->io_next)); return ("(log)"); } static const mdb_io_ops_t logio_ops = { logio_read, logio_write, no_io_seek, no_io_ctl, logio_close, logio_name, no_io_link, no_io_unlink, no_io_setattr, no_io_suspend, no_io_resume }; mdb_io_t * mdb_logio_create(mdb_io_t *logio) { mdb_io_t *io = mdb_alloc(sizeof (mdb_io_t), UM_SLEEP); io->io_ops = &logio_ops; io->io_data = mdb_io_hold(logio); io->io_next = NULL; io->io_refcnt = 0; return (io); }