146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/*
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* Copyright (c) 1983, 1987, 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/param.h> /* DEV_BSIZE */
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#include <sys/types.h>
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#define DKTYPENAMES
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#include <sys/disklabel.h>
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#include <ufs/ffs/fs.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <string.h>
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#include <unistd.h>
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static u_int gettype(char *, const char * const *);
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struct disklabel *
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getdiskbyname(const char *name)
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{
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static struct disklabel disk;
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struct disklabel *dp = &disk;
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struct partition *pp;
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char *buf;
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char *db_array[2] = { _PATH_DISKTAB, 0 };
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char *cp, *cq;
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char p, max, psize[3], pbsize[3],
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pfsize[3], poffset[3], ptype[3];
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if (cgetent(&buf, db_array, (char *) name) < 0)
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return NULL;
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bzero((char *)&disk, sizeof(disk));
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/*
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* typename
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*/
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cq = dp->d_typename;
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cp = buf;
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while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
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(*cq = *cp) && *cq != '|' && *cq != ':')
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cq++, cp++;
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*cq = '\0';
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#define getnumdflt(field, dname, dflt) \
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{ long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
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#define getnum(field, dname) \
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{ long f; cgetnum(buf, dname, &f); field = f; }
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getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
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getnum(dp->d_ntracks, "nt");
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getnum(dp->d_nsectors, "ns");
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getnum(dp->d_ncylinders, "nc");
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if (cgetstr(buf, "dt", &cq) > 0)
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dp->d_type = (u_short)gettype(cq, dktypenames);
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else
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getnumdflt(dp->d_type, "dt", 0);
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getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
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/* XXX */
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dp->d_secperunith = 0;
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getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
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strlcpy(psize, "px", sizeof psize);
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strlcpy(pbsize, "bx", sizeof pbsize);
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strlcpy(pfsize, "fx", sizeof pfsize);
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strlcpy(poffset, "ox", sizeof poffset);
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strlcpy(ptype, "tx", sizeof ptype);
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max = 'a' - 1;
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pp = &dp->d_partitions[0];
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dp->d_version = 1;
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for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
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long f;
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psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
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/* XXX */
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if (cgetnum(buf, psize, &f) == -1)
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DL_SETPSIZE(pp, 0);
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else {
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u_int32_t fsize, frag = 8;
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DL_SETPSIZE(pp, f);
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/* XXX */
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pp->p_offseth = 0;
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getnum(pp->p_offset, poffset);
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getnumdflt(fsize, pfsize, 0);
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if (fsize) {
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long bsize;
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if (cgetnum(buf, pbsize, &bsize) == 0)
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frag = bsize / fsize;
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pp->p_fragblock =
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DISKLABELV1_FFS_FRAGBLOCK(fsize, frag);
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}
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getnumdflt(pp->p_fstype, ptype, 0);
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if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
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pp->p_fstype = (u_char)gettype(cq, fstypenames);
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max = p;
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}
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}
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dp->d_npartitions = max + 1 - 'a';
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dp->d_magic = DISKMAGIC;
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dp->d_magic2 = DISKMAGIC;
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free(buf);
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return (dp);
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}
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static u_int
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gettype(char *t, const char * const *names)
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{
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const char * const *nm;
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for (nm = names; *nm; nm++)
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if (strcasecmp(t, *nm) == 0)
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return (nm - names);
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if (isdigit((u_char)*t))
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return ((u_int)strtonum(t, 0, USHRT_MAX, NULL));
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return (0);
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}
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