710 lines
19 KiB
C
710 lines
19 KiB
C
/* $NetBSD: tunefs.c,v 1.52 2020/05/16 18:31:47 christos Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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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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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tunefs.c 8.3 (Berkeley) 5/3/95";
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#else
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__RCSID("$NetBSD: tunefs.c,v 1.52 2020/05/16 18:31:47 christos Exp $");
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#endif
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#endif /* not lint */
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/*
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* tunefs: change layout parameters to an existing file system.
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*/
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#include <sys/param.h>
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#include <sys/statvfs.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <ufs/ufs/ufs_wapbl.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/quota2.h>
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#include <machine/bswap.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fstab.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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/* the optimization warning string template */
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#define OPTWARN "should optimize for %s with minfree %s %d%%"
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union {
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struct fs sb;
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char data[MAXBSIZE];
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} sbun, buf;
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#define sblock sbun.sb
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int fi;
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long dev_bsize = 512;
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int needswap = 0;
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int is_ufs2 = 0;
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off_t sblockloc;
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int userquota = 0;
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int groupquota = 0;
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#define Q2_EN (1)
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#define Q2_IGN (0)
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#define Q2_DIS (-1)
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static off_t sblock_try[] = SBLOCKSEARCH;
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static void bwrite(daddr_t, char *, int, const char *);
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static void bread(daddr_t, char *, int, const char *);
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static void change_log_info(long long);
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static void getsb(struct fs *, const char *);
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static int openpartition(const char *, int, char *, size_t);
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static void show_log_info(void);
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__dead static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int i, ch, aflag, pflag, Aflag, Fflag, Nflag, openflags;
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const char *special, *chg[2];
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char device[MAXPATHLEN];
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int maxbpg, minfree, optim, secsize;
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int avgfilesize, avgfpdir, active;
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long long logfilesize;
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int secshift, fsbtodb;
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const char *avalue, *pvalue, *name;
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struct statvfs sfs;
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aflag = pflag = Aflag = Fflag = Nflag = 0;
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avalue = pvalue = NULL;
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maxbpg = minfree = optim = secsize = -1;
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avgfilesize = avgfpdir = -1;
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logfilesize = -1;
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secshift = 0;
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chg[FS_OPTSPACE] = "space";
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chg[FS_OPTTIME] = "time";
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while ((ch = getopt(argc, argv, "AFNa:e:g:h:l:m:o:p:q:S:")) != -1) {
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switch (ch) {
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case 'A':
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Aflag++;
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break;
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case 'F':
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Fflag++;
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break;
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case 'N':
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Nflag++;
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break;
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case 'a':
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name = "ACLs";
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avalue = optarg;
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if (strcmp(avalue, "enable") &&
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strcmp(avalue, "disable")) {
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errx(10, "bad %s (options are %s)",
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name, "`enable' or `disable'");
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}
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aflag = 1;
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break;
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case 'e':
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maxbpg = strsuftoll(
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"maximum blocks per file in a cylinder group",
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optarg, 1, INT_MAX);
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break;
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case 'g':
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avgfilesize = strsuftoll("average file size", optarg,
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1, INT_MAX);
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break;
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case 'h':
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avgfpdir = strsuftoll(
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"expected number of files per directory",
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optarg, 1, INT_MAX);
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break;
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case 'l':
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logfilesize = strsuftoll("journal log file size",
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optarg, 0, INT_MAX);
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break;
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case 'm':
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minfree = strsuftoll("minimum percentage of free space",
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optarg, 0, 99);
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break;
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case 'o':
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if (strcmp(optarg, chg[FS_OPTSPACE]) == 0)
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optim = FS_OPTSPACE;
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else if (strcmp(optarg, chg[FS_OPTTIME]) == 0)
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optim = FS_OPTTIME;
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else
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errx(10,
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"bad %s (options are `space' or `time')",
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"optimization preference");
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break;
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case 'p':
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name = "POSIX1e ACLs";
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pvalue = optarg;
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if (strcmp(pvalue, "enable") &&
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strcmp(pvalue, "disable")) {
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errx(10, "bad %s (options are %s)",
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name, "`enable' or `disable'");
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}
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pflag = 1;
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break;
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case 'q':
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if (strcmp(optarg, "user") == 0)
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userquota = Q2_EN;
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else if (strcmp(optarg, "group") == 0)
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groupquota = Q2_EN;
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else if (strcmp(optarg, "nouser") == 0)
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userquota = Q2_DIS;
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else if (strcmp(optarg, "nogroup") == 0)
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groupquota = Q2_DIS;
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else
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errx(11, "invalid quota type %s", optarg);
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break;
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case 'S':
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secsize = strsuftoll("physical sector size",
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optarg, 0, INT_MAX);
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secshift = ffs(secsize) - 1;
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if (secsize != 0 && 1 << secshift != secsize)
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errx(12, "sector size %d is not a power of two", secsize);
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage();
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special = argv[0];
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openflags = Nflag ? O_RDONLY : O_RDWR;
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if (Fflag)
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fi = open(special, openflags);
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else {
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fi = openpartition(special, openflags, device, sizeof(device));
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special = device;
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}
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active = fstatvfs(fi, &sfs) != -1;
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if (fi == -1)
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err(1, "%s", special);
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getsb(&sblock, special);
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#define CHANGEVAL(old, new, type, suffix) do \
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if ((new) != -1) { \
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if ((new) == (old)) \
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warnx("%s remains unchanged at %d%s", \
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(type), (old), (suffix)); \
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else { \
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warnx("%s changes from %d%s to %d%s", \
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(type), (old), (suffix), (new), (suffix)); \
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(old) = (new); \
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} \
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} while (/* CONSTCOND */0)
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warnx("tuning %s", special);
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CHANGEVAL(sblock.fs_maxbpg, maxbpg,
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"maximum blocks per file in a cylinder group", "");
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CHANGEVAL(sblock.fs_minfree, minfree,
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"minimum percentage of free space", "%");
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if (minfree != -1) {
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if (minfree >= MINFREE &&
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sblock.fs_optim == FS_OPTSPACE)
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warnx(OPTWARN, "time", ">=", MINFREE);
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if (minfree < MINFREE &&
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sblock.fs_optim == FS_OPTTIME)
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warnx(OPTWARN, "space", "<", MINFREE);
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}
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if (optim != -1) {
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if (sblock.fs_optim == optim) {
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warnx("%s remains unchanged as %s",
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"optimization preference",
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chg[optim]);
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} else {
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warnx("%s changes from %s to %s",
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"optimization preference",
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chg[sblock.fs_optim], chg[optim]);
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sblock.fs_optim = optim;
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if (sblock.fs_minfree >= MINFREE &&
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optim == FS_OPTSPACE)
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warnx(OPTWARN, "time", ">=", MINFREE);
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if (sblock.fs_minfree < MINFREE &&
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optim == FS_OPTTIME)
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warnx(OPTWARN, "space", "<", MINFREE);
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}
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}
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if (secsize != -1) {
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if (secsize == 0) {
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secsize = sblock.fs_fsize / FFS_FSBTODB(&sblock, 1);
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secshift = ffs(secsize) - 1;
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}
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if (secshift < DEV_BSHIFT)
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warnx("sector size must be at least %d", DEV_BSIZE);
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else if (secshift > sblock.fs_fshift)
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warnx("sector size %d cannot be larger than fragment size %d",
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secsize, sblock.fs_fsize);
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else {
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fsbtodb = sblock.fs_fshift - secshift;
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if (fsbtodb == sblock.fs_fsbtodb) {
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warnx("sector size remains unchanged as %d",
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sblock.fs_fsize / FFS_FSBTODB(&sblock, 1));
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} else {
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warnx("sector size changed from %d to %d",
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sblock.fs_fsize / FFS_FSBTODB(&sblock, 1),
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secsize);
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sblock.fs_fsbtodb = fsbtodb;
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}
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}
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}
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CHANGEVAL(sblock.fs_avgfilesize, avgfilesize,
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"average file size", "");
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CHANGEVAL(sblock.fs_avgfpdir, avgfpdir,
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"expected number of files per directory", "");
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if (logfilesize >= 0)
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change_log_info(logfilesize);
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if (userquota == Q2_EN || groupquota == Q2_EN)
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sblock.fs_flags |= FS_DOQUOTA2;
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if (sblock.fs_flags & FS_DOQUOTA2) {
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sblock.fs_quota_magic = Q2_HEAD_MAGIC;
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switch(userquota) {
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case Q2_EN:
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if ((sblock.fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA))
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== 0) {
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printf("enabling user quotas\n");
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sblock.fs_quota_flags |=
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FS_Q2_DO_TYPE(USRQUOTA);
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sblock.fs_quotafile[USRQUOTA] = 0;
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}
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break;
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case Q2_DIS:
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if ((sblock.fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA))
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!= 0) {
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printf("disabling user quotas\n");
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sblock.fs_quota_flags &=
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~FS_Q2_DO_TYPE(USRQUOTA);
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}
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}
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switch(groupquota) {
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case Q2_EN:
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if ((sblock.fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA))
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== 0) {
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printf("enabling group quotas\n");
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sblock.fs_quota_flags |=
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FS_Q2_DO_TYPE(GRPQUOTA);
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sblock.fs_quotafile[GRPQUOTA] = 0;
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}
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break;
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case Q2_DIS:
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if ((sblock.fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA))
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!= 0) {
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printf("disabling group quotas\n");
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sblock.fs_quota_flags &=
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~FS_Q2_DO_TYPE(GRPQUOTA);
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}
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}
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}
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/*
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* if we disabled all quotas, FS_DOQUOTA2 and associated inode(s) will
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* be cleared by kernel or fsck.
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*/
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if (aflag) {
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name = "ACLs";
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if (strcmp(avalue, "enable") == 0) {
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if (sblock.fs_flags & FS_ACLS) {
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warnx("%s remains unchanged as enabled", name);
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} else if (sblock.fs_flags & FS_POSIX1EACLS) {
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warnx("%s and POSIX.1e ACLs are mutually "
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"exclusive", name);
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} else {
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sblock.fs_flags |= FS_ACLS;
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printf("%s set\n", name);
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}
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} else if (strcmp(avalue, "disable") == 0) {
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if ((~sblock.fs_flags & FS_ACLS) == FS_ACLS) {
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warnx("%s remains unchanged as disabled",
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name);
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} else {
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sblock.fs_flags &= ~FS_ACLS;
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printf("%s cleared\n", name);
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}
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}
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}
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if (pflag) {
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name = "POSIX1e ACLs";
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if (strcmp(pvalue, "enable") == 0) {
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if (sblock.fs_flags & FS_POSIX1EACLS) {
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warnx("%s remains unchanged as enabled", name);
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} else if (sblock.fs_flags & FS_ACLS) {
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warnx("%s and ACLs are mutually "
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"exclusive", name);
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} else {
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sblock.fs_flags |= FS_POSIX1EACLS;
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printf("%s set", name);
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}
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} else if (strcmp(pvalue, "disable") == 0) {
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if ((~sblock.fs_flags & FS_POSIX1EACLS) ==
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FS_POSIX1EACLS) {
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warnx("%s remains unchanged as disabled",
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name);
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} else {
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sblock.fs_flags &= ~FS_POSIX1EACLS;
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printf("%s cleared", name);
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}
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}
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}
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if (Nflag) {
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printf("%s: current settings of %s\n", getprogname(), special);
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printf("\tmaximum contiguous block count %d\n",
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sblock.fs_maxcontig);
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printf("\tmaximum blocks per file in a cylinder group %d\n",
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sblock.fs_maxbpg);
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printf("\tminimum percentage of free space %d%%\n",
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sblock.fs_minfree);
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printf("\toptimization preference: %s\n", chg[sblock.fs_optim]);
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printf("\taverage file size: %d\n", sblock.fs_avgfilesize);
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printf("\texpected number of files per directory: %d\n",
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sblock.fs_avgfpdir);
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show_log_info();
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printf("\tquotas");
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if (sblock.fs_flags & FS_DOQUOTA2) {
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if (sblock.fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA)) {
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printf(" user");
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if (sblock.fs_quota_flags &
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FS_Q2_DO_TYPE(GRPQUOTA))
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printf(",");
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}
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if (sblock.fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA))
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printf(" group");
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printf(" enabled\n");
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} else {
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printf(" disabled\n");
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}
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printf("\tPOSIX.1e ACLs %s\n",
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(sblock.fs_flags & FS_POSIX1EACLS) ? "enabled" : "disabled");
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printf("\tACLs %s\n",
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(sblock.fs_flags & FS_ACLS) ? "enabled" : "disabled");
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printf("%s: no changes made\n", getprogname());
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return 0;
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}
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memcpy(&buf, (char *)&sblock, SBLOCKSIZE);
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if (needswap)
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ffs_sb_swap((struct fs*)&buf, (struct fs*)&buf);
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/* write superblock to original coordinates (use old dev_bsize!) */
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bwrite(sblockloc, buf.data, SBLOCKSIZE, special);
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if (active) {
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struct ufs_args args;
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args.fspec = sfs.f_mntfromname;
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if (mount(MOUNT_FFS, sfs.f_mntonname, sfs.f_flag | MNT_UPDATE,
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&args, sizeof args) == -1)
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warn("mount");
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else
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printf("%s: mount of %s on %s updated\n",
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getprogname(), sfs.f_mntfromname, sfs.f_mntonname);
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}
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/* correct dev_bsize from possibly changed superblock data */
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dev_bsize = sblock.fs_fsize / FFS_FSBTODB(&sblock, 1);
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if (Aflag)
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for (i = 0; i < sblock.fs_ncg; i++)
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bwrite(FFS_FSBTODB(&sblock, cgsblock(&sblock, i)),
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buf.data, SBLOCKSIZE, special);
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close(fi);
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exit(0);
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}
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static void
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show_log_info(void)
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{
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const char *loc;
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uint64_t size, blksize, logsize;
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int print;
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switch (sblock.fs_journal_location) {
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case UFS_WAPBL_JOURNALLOC_NONE:
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print = blksize = 0;
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/* nothing */
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break;
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case UFS_WAPBL_JOURNALLOC_END_PARTITION:
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loc = "end of partition";
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size = sblock.fs_journallocs[UFS_WAPBL_EPART_COUNT];
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blksize = sblock.fs_journallocs[UFS_WAPBL_EPART_BLKSZ];
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print = 1;
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break;
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case UFS_WAPBL_JOURNALLOC_IN_FILESYSTEM:
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loc = "in filesystem";
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size = sblock.fs_journallocs[UFS_WAPBL_INFS_COUNT];
|
|
blksize = sblock.fs_journallocs[UFS_WAPBL_INFS_BLKSZ];
|
|
print = 1;
|
|
break;
|
|
default:
|
|
loc = "unknown";
|
|
size = blksize = 0;
|
|
print = 1;
|
|
break;
|
|
}
|
|
|
|
if (print) {
|
|
logsize = size * blksize;
|
|
|
|
printf("\tjournal log file location: %s\n", loc);
|
|
printf("\tjournal log file size: ");
|
|
if (logsize == 0)
|
|
printf("0\n");
|
|
else {
|
|
char sizebuf[8];
|
|
humanize_number(sizebuf, 6, size * blksize, "B",
|
|
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
|
|
printf("%s (%" PRId64 " bytes)", sizebuf, logsize);
|
|
}
|
|
printf("\n");
|
|
printf("\tjournal log flags:");
|
|
if (sblock.fs_journal_flags & UFS_WAPBL_FLAGS_CREATE_LOG)
|
|
printf(" create-log");
|
|
if (sblock.fs_journal_flags & UFS_WAPBL_FLAGS_CLEAR_LOG)
|
|
printf(" clear-log");
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
change_log_info(long long logfilesize)
|
|
{
|
|
/*
|
|
* NOTES:
|
|
* - only operate on in-filesystem log sizes
|
|
* - can't change size of existing log
|
|
* - if current is same, no action
|
|
* - if current is zero and new is non-zero, set flag to create log
|
|
* on next mount
|
|
* - if current is non-zero and new is zero, set flag to clear log
|
|
* on next mount
|
|
*/
|
|
int in_fs_log;
|
|
uint64_t old_size;
|
|
|
|
old_size = 0;
|
|
switch (sblock.fs_journal_location) {
|
|
case UFS_WAPBL_JOURNALLOC_END_PARTITION:
|
|
in_fs_log = 0;
|
|
old_size = sblock.fs_journallocs[UFS_WAPBL_EPART_COUNT] *
|
|
sblock.fs_journallocs[UFS_WAPBL_EPART_BLKSZ];
|
|
break;
|
|
|
|
case UFS_WAPBL_JOURNALLOC_IN_FILESYSTEM:
|
|
in_fs_log = 1;
|
|
old_size = sblock.fs_journallocs[UFS_WAPBL_INFS_COUNT] *
|
|
sblock.fs_journallocs[UFS_WAPBL_INFS_BLKSZ];
|
|
break;
|
|
|
|
case UFS_WAPBL_JOURNALLOC_NONE:
|
|
default:
|
|
in_fs_log = 0;
|
|
old_size = 0;
|
|
break;
|
|
}
|
|
|
|
if (logfilesize == 0) {
|
|
/*
|
|
* Don't clear out the locators - the kernel might need
|
|
* these to find the log! Just set the "clear the log"
|
|
* flag and let the kernel do the rest.
|
|
*/
|
|
sblock.fs_journal_flags |= UFS_WAPBL_FLAGS_CLEAR_LOG;
|
|
sblock.fs_journal_flags &= ~UFS_WAPBL_FLAGS_CREATE_LOG;
|
|
warnx("log file size cleared from %" PRIu64 "", old_size);
|
|
return;
|
|
}
|
|
|
|
if (!in_fs_log && logfilesize > 0 && old_size > 0)
|
|
errx(1, "Can't change size of non-in-filesystem log");
|
|
|
|
if (old_size == (uint64_t)logfilesize && logfilesize > 0) {
|
|
/* no action */
|
|
warnx("log file size remains unchanged at %lld", logfilesize);
|
|
return;
|
|
}
|
|
|
|
if (old_size == 0) {
|
|
/* create new log of desired size next mount */
|
|
sblock.fs_journal_location = UFS_WAPBL_JOURNALLOC_IN_FILESYSTEM;
|
|
sblock.fs_journallocs[UFS_WAPBL_INFS_ADDR] = 0;
|
|
sblock.fs_journallocs[UFS_WAPBL_INFS_COUNT] = logfilesize;
|
|
sblock.fs_journallocs[UFS_WAPBL_INFS_BLKSZ] = 0;
|
|
sblock.fs_journallocs[UFS_WAPBL_INFS_INO] = 0;
|
|
sblock.fs_journal_flags |= UFS_WAPBL_FLAGS_CREATE_LOG;
|
|
sblock.fs_journal_flags &= ~UFS_WAPBL_FLAGS_CLEAR_LOG;
|
|
warnx("log file size set to %lld", logfilesize);
|
|
} else {
|
|
errx(1,
|
|
"Can't change existing log size from %" PRIu64 " to %lld",
|
|
old_size, logfilesize);
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "usage: tunefs [-AFN] tuneup-options special-device\n");
|
|
fprintf(stderr, "where tuneup-options are:\n");
|
|
fprintf(stderr, "\t-a ACLS: `enable' or `disable'\n");
|
|
fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
|
|
fprintf(stderr, "\t-g average file size\n");
|
|
fprintf(stderr, "\t-h expected number of files per directory\n");
|
|
fprintf(stderr, "\t-l journal log file size (`0' to clear journal)\n");
|
|
fprintf(stderr, "\t-m minimum percentage of free space\n");
|
|
fprintf(stderr, "\t-p POSIX.1e ACLS: `enable' or `disable'\n");
|
|
fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
|
|
fprintf(stderr, "\t-q quota type (`[no]user' or `[no]group')\n");
|
|
fprintf(stderr, "\t-S sector size\n");
|
|
exit(2);
|
|
}
|
|
|
|
static void
|
|
getsb(struct fs *fs, const char *file)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; ; i++) {
|
|
if (sblock_try[i] == -1)
|
|
errx(5, "cannot find filesystem superblock");
|
|
bread(sblock_try[i] / dev_bsize, (char *)fs, SBLOCKSIZE, file);
|
|
switch(fs->fs_magic) {
|
|
case FS_UFS2_MAGIC:
|
|
is_ufs2 = 1;
|
|
/*FALLTHROUGH*/
|
|
case FS_UFS1_MAGIC:
|
|
break;
|
|
case FS_UFS2_MAGIC_SWAPPED:
|
|
is_ufs2 = 1;
|
|
/*FALLTHROUGH*/
|
|
case FS_UFS1_MAGIC_SWAPPED:
|
|
warnx("%s: swapping byte order", file);
|
|
needswap = 1;
|
|
ffs_sb_swap(fs, fs);
|
|
break;
|
|
default:
|
|
continue;
|
|
}
|
|
if (!is_ufs2 && sblock_try[i] == SBLOCK_UFS2)
|
|
continue;
|
|
if ((is_ufs2 || fs->fs_old_flags & FS_FLAGS_UPDATED)
|
|
&& fs->fs_sblockloc != sblock_try[i])
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
dev_bsize = fs->fs_fsize / FFS_FSBTODB(fs, 1);
|
|
sblockloc = sblock_try[i] / dev_bsize;
|
|
}
|
|
|
|
static void
|
|
bwrite(daddr_t blk, char *buffer, int size, const char *file)
|
|
{
|
|
off_t offset;
|
|
|
|
offset = (off_t)blk * dev_bsize;
|
|
if (lseek(fi, offset, SEEK_SET) == -1)
|
|
err(6, "%s: seeking to %lld", file, (long long)offset);
|
|
if (write(fi, buffer, size) != size)
|
|
err(7, "%s: writing %d bytes", file, size);
|
|
}
|
|
|
|
static void
|
|
bread(daddr_t blk, char *buffer, int cnt, const char *file)
|
|
{
|
|
off_t offset;
|
|
int i;
|
|
|
|
offset = (off_t)blk * dev_bsize;
|
|
if (lseek(fi, offset, SEEK_SET) == -1)
|
|
err(4, "%s: seeking to %lld", file, (long long)offset);
|
|
if ((i = read(fi, buffer, cnt)) != cnt)
|
|
errx(5, "%s: short read", file);
|
|
}
|
|
|
|
static int
|
|
openpartition(const char *name, int flags, char *device, size_t devicelen)
|
|
{
|
|
char specname[MAXPATHLEN];
|
|
char rawname[MAXPATHLEN];
|
|
const char *special, *raw;
|
|
struct fstab *fs;
|
|
int fd, oerrno;
|
|
|
|
fs = getfsfile(name);
|
|
special = fs ? fs->fs_spec : name;
|
|
|
|
raw = getfsspecname(specname, sizeof(specname), special);
|
|
if (raw == NULL)
|
|
err(1, "%s: %s", name, specname);
|
|
special = getdiskrawname(rawname, sizeof(rawname), raw);
|
|
if (special == NULL)
|
|
special = raw;
|
|
|
|
fd = opendisk(special, flags, device, devicelen, 0);
|
|
if (fd == -1 && errno == ENOENT) {
|
|
oerrno = errno;
|
|
strlcpy(device, special, devicelen);
|
|
errno = oerrno;
|
|
}
|
|
return (fd);
|
|
}
|