/* * Copyright (c) 1994, 1995 Gordon W. Ross * Copyright (c) 1994 Theo de Raadt * All rights reserved. * Copyright (c) 1987, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Symmetric Computer Systems. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * This product includes software developed by Theo de Raadt. * 4. 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. * * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $ */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1987, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94"; /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ #endif #endif /* not lint */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #define DKTYPENAMES #define FSTYPENAMES #include #include #if (DOSPARTOFF != 446 || NDOSPART != 4 || DOSPTYP_386BSD != 0xa5) #error has changed #else #define I386_DOSPARTOFF 446 #define I386_NDOSPART 4 #define I386_DOSPTYP_386BSD 0xa5 #endif #undef DOSPARTOFF #undef NDOSPART #undef DOSPTYP_386BSD #include #if (DOSPARTOFF != 0 || NDOSPART != 16 || DOSPTYP_386BSD != 0x94) #error has changed #else #define PC98_DOSPARTOFF 0 #define PC98_NDOSPART 16 #define PC98_DOSPTYP_386BSD 0x94 #endif #undef DOSPARTOFF #undef NDOSPART #undef DOSPTYP_386BSD #define IS_PC98 (arch->mach == MACH_PC98) #define DOSPARTOFF (IS_PC98 ? PC98_DOSPARTOFF : I386_DOSPARTOFF) #define NDOSPART (IS_PC98 ? PC98_NDOSPART : I386_NDOSPART) #define DOSPTYP_386BSD (IS_PC98 ? PC98_DOSPTYP_386BSD : I386_DOSPTYP_386BSD) #include #include #include #include #include #include #include #include #include #include "pathnames.h" /* * Disklabel: read and write disklabels. * The label is usually placed on one of the first sectors of the disk. * Many machines also place a bootstrap in the same area, * in which case the label is embedded in the bootstrap. * The bootstrap source must leave space at the proper offset * for the label on such machines. */ #ifndef BBSIZE #define BBSIZE 8192 /* size of boot area, with label */ #endif /* FIX! These are too low, but are traditional */ #define DEFAULT_NEWFS_BLOCK 8192U #define DEFAULT_NEWFS_FRAG 1024U #define DEFAULT_NEWFS_CPG 16U #define BIG_NEWFS_BLOCK 16384U #define BIG_NEWFS_FRAG 2048U #define BIG_NEWFS_CPG 64U void makelabel(const char *, const char *, struct disklabel *); int writelabel(int, void *, struct disklabel *); void l_perror(const char *); struct disklabel *readlabel(int); struct disklabel *makebootarea(void *, struct disklabel *, int); void display(FILE *, const struct disklabel *); int edit(struct disklabel *, int); int editit(void); char *skip(char *); char *word(char *); int getasciilabel(FILE *, struct disklabel *); int getasciipartspec(char *, struct disklabel *, int, int); int checklabel(struct disklabel *); void Warning(const char *, ...) __printflike(1, 2); void usage(void); struct disklabel *getvirginlabel(void); #define DEFEDITOR _PATH_VI #define streq(a,b) (strcmp(a,b) == 0) char *dkname; char *specname; char tmpfil[] = PATH_TMPFILE; char namebuf[BBSIZE], *np = namebuf; struct disklabel lab; int64_t bootarea[BBSIZE / 8]; char blank[] = ""; char unknown[] = "unknown"; #define MAX_PART ('z') #define MAX_NUM_PARTS (1 + MAX_PART - 'a') char part_size_type[MAX_NUM_PARTS]; char part_offset_type[MAX_NUM_PARTS]; int part_set[MAX_NUM_PARTS]; int installboot; /* non-zero if we should install a boot program */ char *xxboot; /* primary boot */ char boot0[MAXPATHLEN]; enum { UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT } op = UNSPEC; enum { ARCH_I386, ARCH_ALPHA, ARCH_IA64 }; enum { MACH_I386, MACH_PC98 }; struct { const char *name; int arch; int mach; off_t label_sector; off_t label_offset; } arches[] = { { "i386", ARCH_I386, MACH_I386, 1, 0 }, { "pc98", ARCH_I386, MACH_PC98, 1, 0 }, { "alpha", ARCH_ALPHA, ARCH_ALPHA, 0, 64 }, { "ia64", ARCH_IA64, ARCH_IA64, 1, 0 }, }, *arch; #define NARCHES (int)(sizeof(arches) / sizeof(*arches)) int rflag; int disable_write; /* set to disable writing to disk label */ int main(int argc, char *argv[]) { struct disklabel *lp; FILE *t; int ch, f = 0, error = 0, i; char *name = 0; while ((ch = getopt(argc, argv, "Bb:em:nRrs:w")) != -1) switch (ch) { case 'B': ++installboot; break; case 'b': xxboot = optarg; break; case 'm': for (i = 0; i < NARCHES && strcmp(arches[i].name, optarg) != 0; i++); if (i == NARCHES) errx(1, "%s: unknown architecture", optarg); arch = &arches[i]; break; case 'n': disable_write = 1; break; case 'R': if (op != UNSPEC) usage(); op = RESTORE; break; case 'e': if (op != UNSPEC) usage(); op = EDIT; break; case 'r': ++rflag; break; case 'w': if (op != UNSPEC) usage(); op = WRITE; break; case '?': default: usage(); } argc -= optind; argv += optind; if (installboot) { rflag++; if (op == UNSPEC) op = WRITEBOOT; } else { if (op == UNSPEC) op = READ; xxboot = 0; } if (argc < 1) usage(); if (arch == NULL) { for (i = 0; i < NARCHES; i++) if (strcmp(arches[i].name, #if defined(__i386__) #ifdef PC98 "pc98" #else "i386" #endif #elif defined(__alpha__) "alpha" #elif defined(__ia64__) "ia64" #else "unknown" #endif ) == 0) { arch = &arches[i]; break; } if (i == NARCHES) errx(1, "unsupported architecture"); } dkname = argv[0]; if (dkname[0] != '/') { (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART); specname = np; np += strlen(specname) + 1; } else specname = dkname; f = open(specname, op == READ ? O_RDONLY : O_RDWR); if (f < 0 && errno == ENOENT && dkname[0] != '/') { (void)sprintf(specname, "%s%s", _PATH_DEV, dkname); np = namebuf + strlen(specname) + 1; f = open(specname, op == READ ? O_RDONLY : O_RDWR); } if (f < 0 && errno == EBUSY) { /* lets try to get by with ioctls */ f = open(specname, O_RDONLY); } if (f < 0) err(4, "%s", specname); switch(op) { case UNSPEC: break; case EDIT: if (argc != 1) usage(); lp = readlabel(f); error = edit(lp, f); break; case READ: if (argc != 1) usage(); lp = readlabel(f); display(stdout, lp); error = checklabel(lp); break; case RESTORE: if (argc != 2) usage(); if (!(t = fopen(argv[1], "r"))) err(4, "%s", argv[1]); if (!getasciilabel(t, &lab)) exit(1); lp = makebootarea(bootarea, &lab, f); *lp = lab; error = writelabel(f, bootarea, lp); break; case WRITE: if (argc == 3) { name = argv[2]; argc--; } if (argc != 2) usage(); makelabel(argv[1], name, &lab); lp = makebootarea(bootarea, &lab, f); *lp = lab; if (checklabel(lp) == 0) error = writelabel(f, bootarea, lp); break; case WRITEBOOT: { struct disklabel tlab; lp = readlabel(f); tlab = *lp; if (argc == 2) makelabel(argv[1], 0, &lab); lp = makebootarea(bootarea, &lab, f); *lp = tlab; if (checklabel(lp) == 0) error = writelabel(f, bootarea, lp); break; } } exit(error); } /* * Construct a prototype disklabel from /etc/disktab. */ void makelabel(const char *type, const char *name, struct disklabel *lp) { struct disklabel *dp; if (strcmp(type, "auto") == 0) dp = getvirginlabel(); else dp = getdiskbyname(type); if (dp == NULL) errx(1, "%s: unknown disk type", type); *lp = *dp; bzero(lp->d_packname, sizeof(lp->d_packname)); if (name) (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname)); } int writelabel(int f, void *boot, struct disklabel *lp) { uint64_t *p, sum; int i; if (disable_write) { Warning("write to disk label supressed - label was as follows:"); display(stdout, lp); return (0); } lp->d_magic = DISKMAGIC; lp->d_magic2 = DISKMAGIC; lp->d_checksum = 0; lp->d_checksum = dkcksum(lp); if (!rflag) { if (ioctl(f, DIOCWDINFO, lp) < 0) { l_perror("ioctl DIOCWDINFO"); return (1); } return (0); } /* * First set the kernel disk label, * then write a label to the raw disk. * If the SDINFO ioctl fails because it is unimplemented, * keep going; otherwise, the kernel consistency checks * may prevent us from changing the current (in-core) * label. */ if (ioctl(f, DIOCSDINFO, lp) < 0 && errno != ENODEV && errno != ENOTTY) { l_perror("ioctl DIOCSDINFO"); return (1); } (void)lseek(f, (off_t)0, SEEK_SET); if (arch->arch == ARCH_ALPHA) { /* * Generate the bootblock checksum for the SRM console. */ for (p = (uint64_t *)boot, i = 0, sum = 0; i < 63; i++) sum += p[i]; p[63] = sum; } if (ioctl(f, DIOCBSDBB, &boot) == 0) return (0); if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) { warn("write"); return (1); } return (0); } void l_perror(const char *s) { switch (errno) { case ESRCH: warnx("%s: no disk label on disk;", s); fprintf(stderr, "add \"-r\" to install initial label\n"); break; case EINVAL: warnx("%s: label magic number or checksum is wrong!", s); fprintf(stderr, "(disklabel or kernel is out of date?)\n"); break; case EBUSY: warnx("%s: open partition would move or shrink", s); break; case EXDEV: warnx("%s: '%c' partition must start at beginning of disk", s, 'a' + RAW_PART); break; default: warn((char *)NULL); break; } } /* * Fetch disklabel for disk. * Use ioctl to get label unless -r flag is given. */ struct disklabel * readlabel(int f) { struct disklabel *lp; if (rflag) { if (read(f, bootarea, BBSIZE) < BBSIZE) err(4, "%s", specname); for (lp = (struct disklabel *)bootarea; lp <= (struct disklabel *) ((char *)bootarea + BBSIZE - sizeof(*lp)); lp = (struct disklabel *)((char *)lp + 16)) if (lp->d_magic == DISKMAGIC && lp->d_magic2 == DISKMAGIC) break; if (lp > (struct disklabel *) ((char *)bootarea + BBSIZE - sizeof(*lp)) || lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC || dkcksum(lp) != 0) errx(1, "bad pack magic number (label is damaged, or pack is unlabeled)"); } else { lp = &lab; if (ioctl(f, DIOCGDINFO, lp) < 0) err(4, "ioctl DIOCGDINFO"); } return (lp); } /* * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' * Returns a pointer to the disklabel portion of the bootarea. */ struct disklabel * makebootarea(void *boot, struct disklabel *dp, int f) { struct disklabel *lp; char *p; int b; char *dkbasename; struct stat sb; uint64_t *bootinfo; int n; char *tmpbuf; int i, found, dps; /* XXX */ if (dp->d_secsize == 0) { dp->d_secsize = DEV_BSIZE; dp->d_bbsize = BBSIZE; } lp = (struct disklabel *) ((char *)boot + (arch->label_sector * dp->d_secsize) + arch->label_offset); bzero((char *)lp, sizeof *lp); /* * If we are not installing a boot program but we are installing a * label on disk then we must read the current bootarea so we don't * clobber the existing boot. */ if (!installboot) { if (rflag) { if (read(f, boot, BBSIZE) < BBSIZE) err(4, "%s", specname); bzero((char *)lp, sizeof *lp); } return (lp); } /* * We are installing a boot program. Determine the name(s) and * read them into the appropriate places in the boot area. */ if (!xxboot) { dkbasename = np; if ((p = rindex(dkname, '/')) == NULL) p = dkname; else p++; while (*p && !isdigit(*p)) *np++ = *p++; *np++ = '\0'; if (!xxboot) { (void)sprintf(boot0, "%s/boot", _PATH_BOOTDIR); xxboot = boot0; } } b = open(xxboot, O_RDONLY); if (b < 0) err(4, "%s", xxboot); if (fstat(b, &sb) != 0) err(4, "%s", xxboot); if (arch->arch == ARCH_I386) { if (sb.st_size > BBSIZE) errx(4, "%s too large", xxboot); /* * XXX Botch alert. * The i386/PC98 has the so-called fdisk table embedded into the * primary bootstrap. We take care to not clobber it, but * only if it does already contain some data. (Otherwise, * the xxboot provides a template.) */ if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) err(4, "%s", xxboot); memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); if (read(b, boot, BBSIZE) < 0) err(4, "%s", xxboot); /* XXX: rely on some very precise overlaps in definitions */ dps = IS_PC98 ? sizeof(struct pc98_partition) : sizeof(struct dos_partition); for (i = DOSPARTOFF, found = 0; !found && i < (int)(DOSPARTOFF + NDOSPART * dps); i++) found = tmpbuf[i] != 0; if (found) memcpy((void *)&((char *)boot)[DOSPARTOFF], (void *)&tmpbuf[DOSPARTOFF], NDOSPART * dps); free(tmpbuf); } if (arch->arch == ARCH_ALPHA) { if (sb.st_size > BBSIZE - dp->d_secsize) errx(4, "%s too large", xxboot); /* * On the alpha, the primary bootstrap starts at the * second sector of the boot area. The first sector * contains the label and must be edited to contain the * size and location of the primary bootstrap. */ n = read(b, (char *)boot + dp->d_secsize, BBSIZE - dp->d_secsize); if (n < 0) err(4, "%s", xxboot); bootinfo = (uint64_t *)((char *)boot + 480); bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize; bootinfo[1] = 1; /* start at sector 1 */ bootinfo[2] = 0; /* flags (must be zero) */ } (void)close(b); /* * Make sure no part of the bootstrap is written in the area * reserved for the label. */ for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++) if (*p) errx(2, "bootstrap doesn't leave room for disk label"); return (lp); } void display(FILE *f, const struct disklabel *lp) { int i, j; const struct partition *pp; fprintf(f, "# %s:\n", specname); if (lp->d_type < DKMAXTYPES) fprintf(f, "type: %s\n", dktypenames[lp->d_type]); else fprintf(f, "type: %u\n", lp->d_type); fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), lp->d_typename); fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), lp->d_packname); fprintf(f, "flags:"); if (lp->d_flags & D_REMOVABLE) fprintf(f, " removeable"); if (lp->d_flags & D_ECC) fprintf(f, " ecc"); if (lp->d_flags & D_BADSECT) fprintf(f, " badsect"); fprintf(f, "\n"); fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); fprintf(f, "rpm: %u\n", lp->d_rpm); fprintf(f, "interleave: %u\n", lp->d_interleave); fprintf(f, "trackskew: %u\n", lp->d_trackskew); fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); fprintf(f, "headswitch: %lu\t\t# milliseconds\n", (u_long)lp->d_headswitch); fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", (u_long)lp->d_trkseek); fprintf(f, "drivedata: "); for (i = NDDATA - 1; i >= 0; i--) if (lp->d_drivedata[i]) break; if (i < 0) i = 0; for (j = 0; j <= i; j++) fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); fprintf(f, "# size offset fstype [fsize bsize bps/cpg]\n"); pp = lp->d_partitions; for (i = 0; i < lp->d_npartitions; i++, pp++) { if (pp->p_size) { fprintf(f, " %c: %8lu %8lu ", 'a' + i, (u_long)pp->p_size, (u_long)pp->p_offset); if (pp->p_fstype < FSMAXTYPES) fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); else fprintf(f, "%8d", pp->p_fstype); switch (pp->p_fstype) { case FS_UNUSED: /* XXX */ fprintf(f, " %5lu %5lu %5.5s ", (u_long)pp->p_fsize, (u_long)(pp->p_fsize * pp->p_frag), ""); break; case FS_BSDFFS: fprintf(f, " %5lu %5lu %5u ", (u_long)pp->p_fsize, (u_long)(pp->p_fsize * pp->p_frag), pp->p_cpg); break; case FS_BSDLFS: fprintf(f, " %5lu %5lu %5d", (u_long)pp->p_fsize, (u_long)(pp->p_fsize * pp->p_frag), pp->p_cpg); break; default: fprintf(f, "%20.20s", ""); break; } fprintf(f, "\t# (Cyl. %4lu", (u_long)(pp->p_offset / lp->d_secpercyl)); if (pp->p_offset % lp->d_secpercyl) putc('*', f); else putc(' ', f); fprintf(f, "- %lu", (u_long)((pp->p_offset + pp->p_size + lp->d_secpercyl - 1) / lp->d_secpercyl - 1)); if (pp->p_size % lp->d_secpercyl) putc('*', f); fprintf(f, ")\n"); } } fflush(f); } int edit(struct disklabel *lp, int f) { int c, fd; struct disklabel label; FILE *fp; if ((fd = mkstemp(tmpfil)) == -1 || (fp = fdopen(fd, "w")) == NULL) { warnx("can't create %s", tmpfil); return (1); } display(fp, lp); fclose(fp); for (;;) { if (!editit()) break; fp = fopen(tmpfil, "r"); if (fp == NULL) { warnx("can't reopen %s for reading", tmpfil); break; } bzero((char *)&label, sizeof(label)); if (getasciilabel(fp, &label)) { *lp = label; if (writelabel(f, bootarea, lp) == 0) { fclose(fp); (void) unlink(tmpfil); return (0); } } fclose(fp); printf("re-edit the label? [y]: "); fflush(stdout); c = getchar(); if (c != EOF && c != (int)'\n') while (getchar() != (int)'\n') ; if (c == (int)'n') break; } (void) unlink(tmpfil); return (1); } int editit(void) { int pid, xpid; int locstat, omask; const char *ed; omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); while ((pid = fork()) < 0) { if (errno == EPROCLIM) { warnx("you have too many processes"); return(0); } if (errno != EAGAIN) { warn("fork"); return(0); } sleep(1); } if (pid == 0) { sigsetmask(omask); setgid(getgid()); setuid(getuid()); if ((ed = getenv("EDITOR")) == (char *)0) ed = DEFEDITOR; execlp(ed, ed, tmpfil, (char *)0); err(1, "%s", ed); } while ((xpid = wait(&locstat)) >= 0) if (xpid == pid) break; sigsetmask(omask); return(!locstat); } char * skip(char *cp) { while (*cp != '\0' && isspace(*cp)) cp++; if (*cp == '\0' || *cp == '#') return (NULL); return (cp); } char * word(char *cp) { char c; while (*cp != '\0' && !isspace(*cp) && *cp != '#') cp++; if ((c = *cp) != '\0') { *cp++ = '\0'; if (c != '#') return (skip(cp)); } return (NULL); } /* * Read an ascii label in from fd f, * in the same format as that put out by display(), * and fill in lp. */ int getasciilabel(FILE *f, struct disklabel *lp) { char *cp; const char **cpp; u_int part; char *tp, line[BUFSIZ]; u_long v; int lineno = 0, errors = 0; int i; bzero(&part_set, sizeof(part_set)); bzero(&part_size_type, sizeof(part_size_type)); bzero(&part_offset_type, sizeof(part_offset_type)); lp->d_bbsize = BBSIZE; /* XXX */ lp->d_sbsize = 0; /* XXX */ while (fgets(line, sizeof(line) - 1, f)) { lineno++; if ((cp = index(line,'\n')) != 0) *cp = '\0'; cp = skip(line); if (cp == NULL) continue; tp = index(cp, ':'); if (tp == NULL) { fprintf(stderr, "line %d: syntax error\n", lineno); errors++; continue; } *tp++ = '\0', tp = skip(tp); if (streq(cp, "type")) { if (tp == NULL) tp = unknown; cpp = dktypenames; for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) if (*cpp && streq(*cpp, tp)) { lp->d_type = cpp - dktypenames; break; } if (cpp < &dktypenames[DKMAXTYPES]) continue; v = strtoul(tp, NULL, 10); if (v >= DKMAXTYPES) fprintf(stderr, "line %d:%s %lu\n", lineno, "Warning, unknown disk type", v); lp->d_type = v; continue; } if (streq(cp, "flags")) { for (v = 0; (cp = tp) && *cp != '\0';) { tp = word(cp); if (streq(cp, "removeable")) v |= D_REMOVABLE; else if (streq(cp, "ecc")) v |= D_ECC; else if (streq(cp, "badsect")) v |= D_BADSECT; else { fprintf(stderr, "line %d: %s: bad flag\n", lineno, cp); errors++; } } lp->d_flags = v; continue; } if (streq(cp, "drivedata")) { for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { lp->d_drivedata[i++] = strtoul(cp, NULL, 10); tp = word(cp); } continue; } if (sscanf(cp, "%lu partitions", &v) == 1) { if (v == 0 || v > MAXPARTITIONS) { fprintf(stderr, "line %d: bad # of partitions\n", lineno); lp->d_npartitions = MAXPARTITIONS; errors++; } else lp->d_npartitions = v; continue; } if (tp == NULL) tp = blank; if (streq(cp, "disk")) { strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); continue; } if (streq(cp, "label")) { strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); continue; } if (streq(cp, "bytes/sector")) { v = strtoul(tp, NULL, 10); if (v == 0 || (v % DEV_BSIZE) != 0) { fprintf(stderr, "line %d: %s: bad sector size\n", lineno, tp); errors++; } else lp->d_secsize = v; continue; } if (streq(cp, "sectors/track")) { v = strtoul(tp, NULL, 10); #if (ULONG_MAX != 0xffffffffUL) if (v == 0 || v > 0xffffffff) { #else if (v == 0) { #endif fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_nsectors = v; continue; } if (streq(cp, "sectors/cylinder")) { v = strtoul(tp, NULL, 10); if (v == 0) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_secpercyl = v; continue; } if (streq(cp, "tracks/cylinder")) { v = strtoul(tp, NULL, 10); if (v == 0) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_ntracks = v; continue; } if (streq(cp, "cylinders")) { v = strtoul(tp, NULL, 10); if (v == 0) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_ncylinders = v; continue; } if (streq(cp, "sectors/unit")) { v = strtoul(tp, NULL, 10); if (v == 0) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_secperunit = v; continue; } if (streq(cp, "rpm")) { v = strtoul(tp, NULL, 10); if (v == 0 || v > USHRT_MAX) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_rpm = v; continue; } if (streq(cp, "interleave")) { v = strtoul(tp, NULL, 10); if (v == 0 || v > USHRT_MAX) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_interleave = v; continue; } if (streq(cp, "trackskew")) { v = strtoul(tp, NULL, 10); if (v > USHRT_MAX) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_trackskew = v; continue; } if (streq(cp, "cylinderskew")) { v = strtoul(tp, NULL, 10); if (v > USHRT_MAX) { fprintf(stderr, "line %d: %s: bad %s\n", lineno, tp, cp); errors++; } else lp->d_cylskew = v; continue; } if (streq(cp, "headswitch")) { v = strtoul(tp, NULL, 10); lp->d_headswitch = v; continue; } if (streq(cp, "track-to-track seek")) { v = strtoul(tp, NULL, 10); lp->d_trkseek = v; continue; } /* the ':' was removed above */ if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { fprintf(stderr, "line %d: %s: Unknown disklabel field\n", lineno, cp); errors++; continue; } /* Process a partition specification line. */ part = *cp - 'a'; if (part >= lp->d_npartitions) { fprintf(stderr, "line %d: partition name out of range a-%c: %s\n", lineno, 'a' + lp->d_npartitions - 1, cp); errors++; continue; } part_set[part] = 1; if (getasciipartspec(tp, lp, part, lineno) != 0) { errors++; break; } } errors += checklabel(lp); return (errors == 0); } #define NXTNUM(n) do { \ if (tp == NULL) { \ fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ return (1); \ } else { \ cp = tp, tp = word(cp); \ (n) = strtoul(cp, NULL, 10); \ } \ } while (0) /* retain 1 character following number */ #define NXTWORD(w,n) do { \ if (tp == NULL) { \ fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ return (1); \ } else { \ char *tmp; \ cp = tp, tp = word(cp); \ (n) = strtoul(cp, &tmp, 10); \ if (tmp) (w) = *tmp; \ } \ } while (0) /* * Read a partition line into partition `part' in the specified disklabel. * Return 0 on success, 1 on failure. */ int getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) { struct partition *pp; char *cp; const char **cpp; u_long v; pp = &lp->d_partitions[part]; cp = NULL; v = 0; NXTWORD(part_size_type[part],v); if (v == 0 && part_size_type[part] != '*') { fprintf(stderr, "line %d: %s: bad partition size\n", lineno, cp); return (1); } pp->p_size = v; v = 0; NXTWORD(part_offset_type[part],v); if (v == 0 && part_offset_type[part] != '*' && part_offset_type[part] != '\0') { fprintf(stderr, "line %d: %s: bad partition offset\n", lineno, cp); return (1); } pp->p_offset = v; cp = tp, tp = word(cp); for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) if (*cpp && streq(*cpp, cp)) break; if (*cpp != NULL) { pp->p_fstype = cpp - fstypenames; } else { if (isdigit(*cp)) v = strtoul(cp, NULL, 10); else v = FSMAXTYPES; if (v >= FSMAXTYPES) { fprintf(stderr, "line %d: Warning, unknown file system type %s\n", lineno, cp); v = FS_UNUSED; } pp->p_fstype = v; } switch (pp->p_fstype) { case FS_UNUSED: /* * allow us to accept defaults for * fsize/frag/cpg */ if (tp) { NXTNUM(pp->p_fsize); if (pp->p_fsize == 0) break; NXTNUM(v); pp->p_frag = v / pp->p_fsize; } /* else default to 0's */ break; /* These happen to be the same */ case FS_BSDFFS: case FS_BSDLFS: if (tp) { NXTNUM(pp->p_fsize); if (pp->p_fsize == 0) break; NXTNUM(v); pp->p_frag = v / pp->p_fsize; NXTNUM(pp->p_cpg); } else { /* * FIX! poor attempt at adaptive */ /* 1 GB */ if (pp->p_size < 1024*1024*1024 / lp->d_secsize) { /* * FIX! These are too low, but are traditional */ pp->p_fsize = DEFAULT_NEWFS_FRAG; pp->p_frag = DEFAULT_NEWFS_BLOCK / DEFAULT_NEWFS_FRAG; pp->p_cpg = DEFAULT_NEWFS_CPG; } else { pp->p_fsize = BIG_NEWFS_FRAG; pp->p_frag = BIG_NEWFS_BLOCK / BIG_NEWFS_FRAG; pp->p_cpg = BIG_NEWFS_CPG; } } default: break; } return (0); } /* * Check disklabel for errors and fill in * derived fields according to supplied values. */ int checklabel(struct disklabel *lp) { struct partition *pp; int i, errors = 0; char part; u_long total_size, total_percent, current_offset; int seen_default_offset; int hog_part; int j; struct partition *pp2; if (lp->d_secsize == 0) { fprintf(stderr, "sector size 0\n"); return (1); } if (lp->d_nsectors == 0) { fprintf(stderr, "sectors/track 0\n"); return (1); } if (lp->d_ntracks == 0) { fprintf(stderr, "tracks/cylinder 0\n"); return (1); } if (lp->d_ncylinders == 0) { fprintf(stderr, "cylinders/unit 0\n"); errors++; } if (lp->d_rpm == 0) Warning("revolutions/minute 0"); if (lp->d_secpercyl == 0) lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; if (lp->d_secperunit == 0) lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; if (lp->d_bbsize == 0) { fprintf(stderr, "boot block size 0\n"); errors++; } else if (lp->d_bbsize % lp->d_secsize) Warning("boot block size %% sector-size != 0"); if (lp->d_npartitions > MAXPARTITIONS) Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", (u_long)lp->d_npartitions, MAXPARTITIONS); /* first allocate space to the partitions, then offsets */ total_size = 0; /* in sectors */ total_percent = 0; /* in percent */ hog_part = -1; /* find all fixed partitions */ for (i = 0; i < lp->d_npartitions; i++) { pp = &lp->d_partitions[i]; if (part_set[i]) { if (part_size_type[i] == '*') { if (i == RAW_PART) { pp->p_size = lp->d_secperunit; } else { if (hog_part != -1) Warning("Too many '*' partitions (%c and %c)", hog_part + 'a',i + 'a'); else hog_part = i; } } else { off_t size; size = pp->p_size; switch (part_size_type[i]) { case '%': total_percent += size; break; case 'k': case 'K': size *= 1024ULL; break; case 'm': case 'M': size *= 1024ULL * 1024ULL; break; case 'g': case 'G': size *= 1024ULL * 1024ULL * 1024ULL; break; case '\0': break; default: Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); break; } /* don't count %'s yet */ if (part_size_type[i] != '%') { /* * for all not in sectors, convert to * sectors */ if (part_size_type[i] != '\0') { if (size % lp->d_secsize != 0) Warning("partition %c not an integer number of sectors", i + 'a'); size /= lp->d_secsize; pp->p_size = size; } /* else already in sectors */ if (i != RAW_PART) total_size += size; } } } } /* handle % partitions - note %'s don't need to add up to 100! */ if (total_percent != 0) { long free_space = lp->d_secperunit - total_size; if (total_percent > 100) { fprintf(stderr,"total percentage %lu is greater than 100\n", total_percent); errors++; } if (free_space > 0) { for (i = 0; i < lp->d_npartitions; i++) { pp = &lp->d_partitions[i]; if (part_set[i] && part_size_type[i] == '%') { /* careful of overflows! and integer roundoff */ pp->p_size = ((double)pp->p_size/100) * free_space; total_size += pp->p_size; /* FIX we can lose a sector or so due to roundoff per partition. A more complex algorithm could avoid that */ } } } else { fprintf(stderr, "%ld sectors available to give to '*' and '%%' partitions\n", free_space); errors++; /* fix? set all % partitions to size 0? */ } } /* give anything remaining to the hog partition */ if (hog_part != -1) { lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; total_size = lp->d_secperunit; } /* Now set the offsets for each partition */ current_offset = 0; /* in sectors */ seen_default_offset = 0; for (i = 0; i < lp->d_npartitions; i++) { part = 'a' + i; pp = &lp->d_partitions[i]; if (part_set[i]) { if (part_offset_type[i] == '*') { if (i == RAW_PART) { pp->p_offset = 0; } else { pp->p_offset = current_offset; seen_default_offset = 1; } } else { /* allow them to be out of order for old-style tables */ if (pp->p_offset < current_offset && seen_default_offset && i != RAW_PART && pp->p_fstype != FS_VINUM) { fprintf(stderr, "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", (long)pp->p_offset,i+'a',current_offset); fprintf(stderr, "Labels with any *'s for offset must be in ascending order by sector\n"); errors++; } else if (pp->p_offset != current_offset && i != RAW_PART && seen_default_offset) { /* * this may give unneeded warnings if * partitions are out-of-order */ Warning( "Offset %ld for partition %c doesn't match expected value %ld", (long)pp->p_offset, i + 'a', current_offset); } } if (i != RAW_PART) current_offset = pp->p_offset + pp->p_size; } } for (i = 0; i < lp->d_npartitions; i++) { part = 'a' + i; pp = &lp->d_partitions[i]; if (pp->p_size == 0 && pp->p_offset != 0) Warning("partition %c: size 0, but offset %lu", part, (u_long)pp->p_offset); #ifdef notdef if (pp->p_size % lp->d_secpercyl) Warning("partition %c: size %% cylinder-size != 0", part); if (pp->p_offset % lp->d_secpercyl) Warning("partition %c: offset %% cylinder-size != 0", part); #endif if (pp->p_offset > lp->d_secperunit) { fprintf(stderr, "partition %c: offset past end of unit\n", part); errors++; } if (pp->p_offset + pp->p_size > lp->d_secperunit) { fprintf(stderr, "partition %c: partition extends past end of unit\n", part); errors++; } if (i == RAW_PART) { if (pp->p_fstype != FS_UNUSED) Warning("partition %c is not marked as unused!",part); if (pp->p_offset != 0) Warning("partition %c doesn't start at 0!",part); if (pp->p_size != lp->d_secperunit) Warning("partition %c doesn't cover the whole unit!",part); if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || (pp->p_size != lp->d_secperunit)) { Warning("An incorrect partition %c may cause problems for " "standard system utilities",part); } } /* check for overlaps */ /* this will check for all possible overlaps once and only once */ for (j = 0; j < i; j++) { pp2 = &lp->d_partitions[j]; if (j != RAW_PART && i != RAW_PART && pp->p_fstype != FS_VINUM && pp2->p_fstype != FS_VINUM && part_set[i] && part_set[j]) { if (pp2->p_offset < pp->p_offset + pp->p_size && (pp2->p_offset + pp2->p_size > pp->p_offset || pp2->p_offset >= pp->p_offset)) { fprintf(stderr,"partitions %c and %c overlap!\n", j + 'a', i + 'a'); errors++; } } } } for (; i < MAXPARTITIONS; i++) { part = 'a' + i; pp = &lp->d_partitions[i]; if (pp->p_size || pp->p_offset) Warning("unused partition %c: size %d offset %lu", 'a' + i, pp->p_size, (u_long)pp->p_offset); } return (errors); } /* * When operating on a "virgin" disk, try getting an initial label * from the associated device driver. This might work for all device * drivers that are able to fetch some initial device parameters * without even having access to a (BSD) disklabel, like SCSI disks, * most IDE drives, or vn devices. * * The device name must be given in its "canonical" form. */ struct disklabel * getvirginlabel(void) { static struct disklabel loclab; struct partition *dp; char lnamebuf[BBSIZE]; int f; u_int secsize, u; off_t mediasize; if (dkname[0] == '/') { warnx("\"auto\" requires the usage of a canonical disk name"); return (NULL); } (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname); if ((f = open(lnamebuf, O_RDONLY)) == -1) { warn("cannot open %s", lnamebuf); return (NULL); } /* New world order */ if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { close (f); return (NULL); } memset(&loclab, 0, sizeof loclab); loclab.d_magic = DISKMAGIC; loclab.d_magic2 = DISKMAGIC; loclab.d_secsize = secsize; loclab.d_secperunit = mediasize / secsize; /* * Nobody in these enligthened days uses the CHS geometry for * anything, but nontheless try to get it right. If we fail * to get any good ideas from the device, construct something * which is IBM-PC friendly. */ if (ioctl(f, DIOCGFWSECTORS, &u) == 0) loclab.d_nsectors = u; else loclab.d_nsectors = 63; if (ioctl(f, DIOCGFWHEADS, &u) == 0) loclab.d_ntracks = u; else if (loclab.d_secperunit <= 63*1*1024) loclab.d_ntracks = 1; else if (loclab.d_secperunit <= 63*16*1024) loclab.d_ntracks = 16; else loclab.d_ntracks = 255; loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; loclab.d_npartitions = MAXPARTITIONS; /* Various (unneeded) compat stuff */ loclab.d_rpm = 3600; loclab.d_bbsize = BBSIZE; loclab.d_interleave = 1;; strncpy(loclab.d_typename, "amnesiac", sizeof(loclab.d_typename)); dp = &loclab.d_partitions[RAW_PART]; dp->p_size = loclab.d_secperunit; loclab.d_checksum = dkcksum(&loclab); close (f); return (&loclab); } /*VARARGS1*/ void Warning(const char *fmt, ...) { va_list ap; fprintf(stderr, "Warning, "); va_start(ap, fmt); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); } void usage(void) { fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", "usage: disklabel [-r] disk", "\t\t(to read label)", " disklabel -w [-nr] [-m machine] disk type [packid]", "\t\t(to write label with existing boot program)", " disklabel -e [-nr] [-m machine] disk", "\t\t(to edit label)", " disklabel -R [-nr] [-m machine] disk protofile", "\t\t(to restore label with existing boot program)", " disklabel -B [-b boot] [-m machine] disk", "\t\t(to install boot program with existing on-disk label)", " disklabel -w -B [-n] [-b boot] [-m machine] disk type [packid]", "\t\t(to write label and install boot program)", " disklabel -R -B [-n] [-b boot] [-m machine] disk protofile", "\t\t(to restore label and install boot program)" ); exit(1); }