2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
198 lines
6.2 KiB
C
198 lines
6.2 KiB
C
/* $NetBSD: devname.c,v 1.21 2010/03/23 20:28:59 drochner Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Simon Burge.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1992 Keith Muller.
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)devname.c 8.2 (Berkeley) 4/29/95";
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#else
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__RCSID("$NetBSD: devname.c,v 1.21 2010/03/23 20:28:59 drochner Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <db.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <err.h>
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#define DEV_SZ 317 /* show be prime for best results */
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#define VALID 1 /* entry and devname are valid */
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#define INVALID 2 /* entry valid, devname NOT valid */
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typedef struct devc {
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int valid; /* entry valid? */
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dev_t dev; /* cached device */
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mode_t type; /* cached file type */
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char name[NAME_MAX]; /* device name */
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} DEVC;
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char *
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devname(dev, type)
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dev_t dev;
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mode_t type;
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{
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struct {
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mode_t type;
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dev_t dev;
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} bkey;
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struct {
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mode_t type;
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int32_t dev;
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} obkey;
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static DB *db;
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static int failure;
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DBT data, key;
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DEVC *ptr, **pptr;
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static DEVC **devtb = NULL;
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static devmajor_t pts;
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static int pts_valid = 0;
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if (!db && !failure &&
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!(db = dbopen(_PATH_DEVDB, O_RDONLY, 0, DB_HASH, NULL))) {
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warn("warning: %s", _PATH_DEVDB);
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failure = 1;
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}
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/* initialise dev cache */
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if (!failure && devtb == NULL) {
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devtb = calloc(DEV_SZ, sizeof(DEVC *));
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if (devtb == NULL)
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failure= 1;
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}
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if (failure)
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return (NULL);
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/* see if we have this dev/type cached */
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pptr = devtb + (size_t)((dev + type) % DEV_SZ);
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ptr = *pptr;
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if (ptr && ptr->valid > 0 && ptr->dev == dev && ptr->type == type) {
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if (ptr->valid == VALID)
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return (ptr->name);
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return (NULL);
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}
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if (ptr == NULL)
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*pptr = ptr = malloc(sizeof(DEVC));
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/*
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* Keys are a mode_t followed by a dev_t. The former is the type of
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* the file (mode & S_IFMT), the latter is the st_rdev field. Be
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* sure to clear any padding that may be found in bkey.
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*/
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(void)memset(&bkey, 0, sizeof(bkey));
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bkey.dev = dev;
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bkey.type = type;
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key.data = &bkey;
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key.size = sizeof(bkey);
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if ((db->get)(db, &key, &data, 0) == 0) {
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found_it:
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if (ptr == NULL)
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return (char *)data.data;
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ptr->dev = dev;
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ptr->type = type;
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strncpy(ptr->name, (char *)data.data, NAME_MAX);
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ptr->name[NAME_MAX - 1] = '\0';
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ptr->valid = VALID;
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} else {
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/* Look for a 32 bit dev_t. */
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(void)memset(&obkey, 0, sizeof(obkey));
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obkey.dev = (int32_t)(uint32_t)dev;
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obkey.type = type;
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key.data = &obkey;
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key.size = sizeof(obkey);
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if ((db->get)(db, &key, &data, 0) == 0)
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goto found_it;
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if (ptr == NULL)
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return (NULL);
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ptr->valid = INVALID;
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if (type == S_IFCHR) {
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if (!pts_valid) {
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pts = getdevmajor("pts", S_IFCHR);
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pts_valid = 1;
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}
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if (pts != NODEVMAJOR && major(dev) == pts) {
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(void)snprintf(ptr->name, sizeof(ptr->name),
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"%s%d", _PATH_DEV_PTS +
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sizeof(_PATH_DEV) - 1,
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minor(dev));
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ptr->valid = VALID;
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}
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}
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ptr->dev = dev;
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ptr->type = type;
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}
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if (ptr->valid == VALID)
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return (ptr->name);
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else
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return (NULL);
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}
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