/* $NetBSD: disklabel.c,v 1.30 2003/08/07 16:42:47 agc Exp $ */ /* * Copyright (c) 1983, 1987, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 5/3/95"; #else __RCSID("$NetBSD: disklabel.c,v 1.30 2003/08/07 16:42:47 agc Exp $"); #endif #endif /* LIBC_SCCS and not lint */ #include "namespace.h" #include #define DKTYPENAMES #define FSTYPENAMES #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __weak_alias __weak_alias(getdiskbyname,_getdiskbyname) #endif #if 0 static void error __P((int)); #endif static int gettype __P((char *, const char *const *)); static char *db_array[2] = { _PATH_DISKTAB, 0 }; int setdisktab(name) char *name; { if (!name || !*name) return -1; db_array[0] = name; return 0; } struct disklabel * getdiskbyname(name) const char *name; { static struct disklabel disk; struct disklabel *dp = &disk; struct partition *pp; char *buf; char *cp, *cq; /* can't be */ char p, max, psize[3], pbsize[3], pfsize[3], poffset[3], ptype[3]; u_int32_t *dx; long f; _DIAGASSERT(name != NULL); if (cgetent(&buf, db_array, name) < 0) return NULL; memset(&disk, 0, sizeof(disk)); /* * typename */ cq = dp->d_typename; cp = buf; while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && (*cq = *cp) && *cq != '|' && *cq != ':') cq++, cp++; *cq = '\0'; /* * boot name (optional) xxboot, bootxx */ cgetstr(buf, "b0", &dp->d_boot0); cgetstr(buf, "b1", &dp->d_boot1); if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) dp->d_flags |= D_REMOVABLE; else if (cq && strcmp(cq, "simulated") == 0) dp->d_flags |= D_RAMDISK; if (cgetcap(buf, "sf", ':') != NULL) dp->d_flags |= D_BADSECT; #define getnumdflt(field, dname, dflt) \ (field) = ((cgetnum(buf, dname, &f) == -1) ? (dflt) : (u_int32_t) f) #define getnum(field, dname) \ if (cgetnum(buf, dname, &f) != -1) field = (u_int32_t)f getnumdflt(dp->d_secsize, "se", DEV_BSIZE); getnum(dp->d_ntracks, "nt"); getnum(dp->d_nsectors, "ns"); getnum(dp->d_ncylinders, "nc"); if (cgetstr(buf, "dt", &cq) > 0) dp->d_type = gettype(cq, dktypenames); else getnumdflt(dp->d_type, "dt", 0); getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); getnumdflt(dp->d_rpm, "rm", 3600); getnumdflt(dp->d_interleave, "il", 1); getnumdflt(dp->d_trackskew, "sk", 0); getnumdflt(dp->d_cylskew, "cs", 0); getnumdflt(dp->d_headswitch, "hs", 0); getnumdflt(dp->d_trkseek, "ts", 0); getnumdflt(dp->d_bbsize, "bs", BBSIZE); getnumdflt(dp->d_sbsize, "sb", SBLOCKSIZE); strcpy(psize, "px"); /* XXX: strcpy is safe */ strcpy(pbsize, "bx"); /* XXX: strcpy is safe */ strcpy(pfsize, "fx"); /* XXX: strcpy is safe */ strcpy(poffset, "ox"); /* XXX: strcpy is safe */ strcpy(ptype, "tx"); /* XXX: strcpy is safe */ max = 'a' - 1; pp = &dp->d_partitions[0]; for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { long ff; psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; if (cgetnum(buf, psize, &ff) == -1) pp->p_size = 0; else { pp->p_size = (u_int32_t)ff; getnum(pp->p_offset, poffset); getnumdflt(pp->p_fsize, pfsize, 0); if (pp->p_fsize) { long bsize; if (cgetnum(buf, pbsize, &bsize) == -1) pp->p_frag = 8; else pp->p_frag = (u_int8_t)(bsize / pp->p_fsize); } getnumdflt(pp->p_fstype, ptype, 0); if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) pp->p_fstype = gettype(cq, fstypenames); max = p; } } dp->d_npartitions = max + 1 - 'a'; strcpy(psize, "dx"); /* XXX: strcpy is safe */ dx = dp->d_drivedata; for (p = '0'; p < '0' + NDDATA; p++, dx++) { psize[1] = p; getnumdflt(*dx, psize, 0); } dp->d_magic = DISKMAGIC; dp->d_magic2 = DISKMAGIC; free(buf); return (dp); } static int gettype(t, names) char *t; const char *const *names; { const char *const *nm; _DIAGASSERT(t != NULL); _DIAGASSERT(names != NULL); for (nm = names; *nm; nm++) if (strcasecmp(t, *nm) == 0) return (nm - names); if (isdigit((unsigned char) *t)) return (atoi(t)); return (0); } #if 0 static void error(err) int err; { char *p; (void)write(STDERR_FILENO, "disktab: ", 9); (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); (void)write(STDERR_FILENO, ": ", 2); p = strerror(err); (void)write(STDERR_FILENO, p, strlen(p)); (void)write(STDERR_FILENO, "\n", 1); } #endif