/* * 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 $ */ #if 0 #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 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94"; /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ #endif /* not lint */ #endif #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #define DKTYPENAMES #define FSTYPENAMES #define MAXPARTITIONS 20 #include #include #include #include #include #include #include #include #include #include #include #include "pathnames.h" static void makelabel(const char *, struct disklabel *); static int geom_class_available(const char *); static int writelabel(void); static int readlabel(int flag); static void display(FILE *, const struct disklabel *); static int edit(void); static int editit(void); static void fixlabel(struct disklabel *); static char *skip(char *); static char *word(char *); static int getasciilabel(FILE *, struct disklabel *); static int getasciipartspec(char *, struct disklabel *, int, int); static int checklabel(struct disklabel *); static void usage(void); static struct disklabel *getvirginlabel(void); #define DEFEDITOR _PATH_VI #define DEFPARTITIONS 8 static char *specname; static char *pname; static char tmpfil[] = PATH_TMPFILE; static struct disklabel lab; static u_char bootarea[BBSIZE]; static off_t mediasize; static ssize_t secsize; static char blank[] = ""; static char unknown[] = "unknown"; #define MAX_PART ('z') #define MAX_NUM_PARTS (1 + MAX_PART - 'a') static char part_size_type[MAX_NUM_PARTS]; static char part_offset_type[MAX_NUM_PARTS]; static int part_set[MAX_NUM_PARTS]; static int installboot; /* non-zero if we should install a boot program */ static int allfields; /* present all fields in edit */ static char const *xxboot; /* primary boot */ static uint32_t lba_offset; #ifndef LABELSECTOR #define LABELSECTOR -1 #endif #ifndef LABELOFFSET #define LABELOFFSET -1 #endif static int labelsoffset = LABELSECTOR; static int labeloffset = LABELOFFSET; static int bbsize = BBSIZE; static enum { UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT } op = UNSPEC; static int disable_write; /* set to disable writing to disk label */ static int is_file; /* work on a file (abs. pathname), "-f" opt. */ int main(int argc, char *argv[]) { FILE *t; int ch, error, fd; const char *name; error = 0; name = NULL; while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1) switch (ch) { case 'A': allfields = 1; break; case 'B': ++installboot; break; case 'b': xxboot = optarg; break; case 'f': is_file=1; break; case 'm': if (!strcmp(optarg, "i386") || !strcmp(optarg, "amd64") || !strcmp(optarg, "ia64") || !strcmp(optarg, "pc98")) { labelsoffset = 1; labeloffset = 0; bbsize = 8192; } else { errx(1, "Unsupported architecture"); } 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': /* * We accept and ignore -r for compatibility with * historical disklabel usage. */ break; case 'w': if (op != UNSPEC) usage(); op = WRITE; break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc < 1) usage(); if (labelsoffset < 0 || labeloffset < 0) errx(1, "a -m option must be specified"); /* Figure out the names of the thing we're working on */ if (is_file) { specname = argv[0]; } else { specname = g_device_path(argv[0]); if (specname == NULL) { warn("unable to get correct path for %s", argv[0]); return(1); } fd = open(specname, O_RDONLY); if (fd < 0) { warn("error opening %s", specname); return(1); } pname = g_providername(fd); if (pname == NULL) { warn("error getting providername for %s", specname); close(fd); return(1); } close(fd); } if (installboot && op == UNSPEC) op = WRITEBOOT; else if (op == UNSPEC) op = READ; switch(op) { case UNSPEC: break; case EDIT: if (argc != 1) usage(); readlabel(1); fixlabel(&lab); error = edit(); break; case READ: if (argc != 1) usage(); readlabel(1); display(stdout, NULL); error = checklabel(NULL); break; case RESTORE: if (argc != 2) usage(); if (!(t = fopen(argv[1], "r"))) err(4, "fopen %s", argv[1]); readlabel(0); if (!getasciilabel(t, &lab)) exit(1); error = writelabel(); break; case WRITE: if (argc == 2) name = argv[1]; else if (argc == 1) name = "auto"; else usage(); readlabel(0); makelabel(name, &lab); fixlabel(&lab); if (checklabel(NULL) == 0) error = writelabel(); break; case WRITEBOOT: readlabel(1); fixlabel(&lab); if (argc == 2) makelabel(argv[1], &lab); if (checklabel(NULL) == 0) error = writelabel(); break; } exit(error); } static void fixlabel(struct disklabel *lp) { struct partition *dp; int i; for (i = 0; i < lp->d_npartitions; i++) { if (i == RAW_PART) continue; if (lp->d_partitions[i].p_size) return; } dp = &lp->d_partitions[0]; dp->p_offset = BBSIZE / secsize; dp->p_size = lp->d_secperunit - dp->p_offset; } /* * Construct a prototype disklabel from /etc/disktab. */ static void makelabel(const char *type, 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)); } static void readboot(void) { int fd; struct stat st; if (xxboot == NULL) xxboot = "/boot/boot"; fd = open(xxboot, O_RDONLY); if (fd < 0) err(1, "cannot open %s", xxboot); fstat(fd, &st); if (st.st_size <= BBSIZE) { if (read(fd, bootarea, st.st_size) != st.st_size) err(1, "read error %s", xxboot); close(fd); return; } errx(1, "boot code %s is wrong size", xxboot); } static int geom_class_available(const char *name) { struct gclass *class; struct gmesh mesh; int error; error = geom_gettree(&mesh); if (error != 0) errc(1, error, "Cannot get GEOM tree"); LIST_FOREACH(class, &mesh.lg_class, lg_class) { if (strcmp(class->lg_name, name) == 0) { geom_deletetree(&mesh); return (1); } } geom_deletetree(&mesh); return (0); } static int writelabel(void) { int i, fd, serrno; struct gctl_req *grq; char const *errstr; struct disklabel *lp = &lab; if (disable_write) { warnx("write to disk label suppressed - label was as follows:"); display(stdout, NULL); return (0); } lp->d_magic = DISKMAGIC; lp->d_magic2 = DISKMAGIC; lp->d_checksum = 0; lp->d_checksum = dkcksum(lp); if (installboot) readboot(); for (i = 0; i < lab.d_npartitions; i++) if (lab.d_partitions[i].p_size) lab.d_partitions[i].p_offset += lba_offset; bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize, lp); fd = open(specname, O_RDWR); if (fd < 0) { if (is_file) { warn("cannot open file %s for writing label", specname); return(1); } else serrno = errno; if (geom_class_available("PART") != 0) { /* * Since we weren't able open provider for * writing, then recommend user to use gpart(8). */ warnc(serrno, "cannot open provider %s for writing label", specname); warnx("Try to use gpart(8)."); return (1); } /* Give up if GEOM_BSD is not available. */ if (geom_class_available("BSD") == 0) { warnc(serrno, "%s", specname); return (1); } grq = gctl_get_handle(); gctl_ro_param(grq, "verb", -1, "write label"); gctl_ro_param(grq, "class", -1, "BSD"); gctl_ro_param(grq, "geom", -1, pname); gctl_ro_param(grq, "label", 148+16*8, bootarea + labeloffset + labelsoffset * lab.d_secsize); errstr = gctl_issue(grq); if (errstr != NULL) { warnx("%s", errstr); gctl_free(grq); return(1); } gctl_free(grq); if (installboot) { grq = gctl_get_handle(); gctl_ro_param(grq, "verb", -1, "write bootcode"); gctl_ro_param(grq, "class", -1, "BSD"); gctl_ro_param(grq, "geom", -1, pname); gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); errstr = gctl_issue(grq); if (errstr != NULL) { warnx("%s", errstr); gctl_free(grq); return (1); } gctl_free(grq); } } else { if (write(fd, bootarea, bbsize) != bbsize) { warn("write %s", specname); close (fd); return (1); } close (fd); } return (0); } static void get_file_parms(int f) { int i; struct stat sb; if (fstat(f, &sb) != 0) err(4, "fstat failed"); i = sb.st_mode & S_IFMT; if (i != S_IFREG && i != S_IFLNK) errx(4, "%s is not a valid file or link", specname); secsize = DEV_BSIZE; mediasize = sb.st_size; } /* * Fetch disklabel for disk. */ static int readlabel(int flag) { ssize_t nbytes; uint32_t lba; int f, i; int error; f = open(specname, O_RDONLY); if (f < 0) err(1, "%s", specname); if (is_file) get_file_parms(f); else { mediasize = g_mediasize(f); secsize = g_sectorsize(f); if (secsize < 0 || mediasize < 0) err(4, "cannot get disk geometry"); } if (mediasize > (off_t)0xffffffff * secsize) errx(1, "disks with more than 2^32-1 sectors are not supported"); (void)lseek(f, (off_t)0, SEEK_SET); nbytes = read(f, bootarea, BBSIZE); if (nbytes == -1) err(4, "%s read", specname); if (nbytes != BBSIZE) errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); close (f); error = bsd_disklabel_le_dec( bootarea + (labeloffset + labelsoffset * secsize), &lab, MAXPARTITIONS); if (flag && error) errx(1, "%s: no valid label found", specname); if (is_file) return(0); /* * Compensate for absolute block addressing by finding the * smallest partition offset and if the offset of the 'c' * partition is equal to that, subtract it from all offsets. */ lba = ~0; for (i = 0; i < lab.d_npartitions; i++) { if (lab.d_partitions[i].p_size) lba = MIN(lba, lab.d_partitions[i].p_offset); } if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { for (i = 0; i < lab.d_npartitions; i++) { if (lab.d_partitions[i].p_size) lab.d_partitions[i].p_offset -= lba; } /* * Save the offset so that we can write the label * back with absolute block addresses. */ lba_offset = lba; } return (error); } static void display(FILE *f, const struct disklabel *lp) { int i, j; const struct partition *pp; if (lp == NULL) lp = &lab; fprintf(f, "# %s:\n", specname); if (allfields) { 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"); } fprintf(f, "%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: %10lu %10lu ", '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 %2s", (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; } if (i == RAW_PART) { fprintf(f, " # \"raw\" part, don't edit"); } fprintf(f, "\n"); } } fflush(f); } static int edit(void) { 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, NULL); 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)); c = getasciilabel(fp, &label); fclose(fp); if (c) { lab = label; if (writelabel() == 0) { (void) unlink(tmpfil); return (0); } } 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); } static int editit(void) { int pid, xpid; int locstat, omask; const char *ed; uid_t uid; gid_t gid; 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); gid = getgid(); if (setresgid(gid, gid, gid) == -1) err(1, "setresgid"); uid = getuid(); if (setresuid(uid, uid, uid) == -1) err(1, "setresuid"); 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); } static char * skip(char *cp) { while (*cp != '\0' && isspace(*cp)) cp++; if (*cp == '\0' || *cp == '#') return (NULL); return (cp); } static 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. */ static int getasciilabel(FILE *f, struct disklabel *lp) { char *cp, *endp; const char **cpp; u_int part; char *tp, line[BUFSIZ]; u_long v; int lineno = 0, errors = 0; int i; makelabel("auto", lp); 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 = strchr(line,'\n')) != 0) *cp = '\0'; cp = skip(line); if (cp == NULL) continue; tp = strchr(cp, ':'); if (tp == NULL) { fprintf(stderr, "line %d: syntax error\n", lineno); errors++; continue; } *tp++ = '\0', tp = skip(tp); if (!strcmp(cp, "type")) { if (tp == NULL) tp = unknown; cpp = dktypenames; for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) if (*cpp && !strcmp(*cpp, tp)) { lp->d_type = cpp - dktypenames; break; } if (cpp < &dktypenames[DKMAXTYPES]) continue; errno = 0; v = strtoul(tp, &endp, 10); if (errno != 0 || *endp != '\0') v = DKMAXTYPES; if (v >= DKMAXTYPES) fprintf(stderr, "line %d:%s %lu\n", lineno, "Warning, unknown disk type", v); else lp->d_type = v; continue; } if (!strcmp(cp, "flags")) { for (v = 0; (cp = tp) && *cp != '\0';) { tp = word(cp); if (!strcmp(cp, "removeable")) v |= D_REMOVABLE; else if (!strcmp(cp, "ecc")) v |= D_ECC; else if (!strcmp(cp, "badsect")) v |= D_BADSECT; else { fprintf(stderr, "line %d: %s: bad flag\n", lineno, cp); errors++; } } lp->d_flags = v; continue; } if (!strcmp(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 > MAXPARTITIONS) { fprintf(stderr, "line %d: bad # of partitions\n", lineno); lp->d_npartitions = MAXPARTITIONS; errors++; } else if (v < DEFPARTITIONS) { fprintf(stderr, "line %d: bad # of partitions\n", lineno); lp->d_npartitions = DEFPARTITIONS; errors++; } else lp->d_npartitions = v; continue; } if (tp == NULL) tp = blank; if (!strcmp(cp, "disk")) { strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); continue; } if (!strcmp(cp, "label")) { strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); continue; } if (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(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 (!strcmp(cp, "headswitch")) { v = strtoul(tp, NULL, 10); lp->d_headswitch = v; continue; } if (!strcmp(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. */ static int getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) { struct partition *pp; char *cp, *endp; 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; if (tp == NULL) { fprintf(stderr, "line %d: missing file system type\n", lineno); return (1); } cp = tp, tp = word(cp); for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) if (*cpp && !strcmp(*cpp, cp)) break; if (*cpp != NULL) { pp->p_fstype = cpp - fstypenames; } else { if (isdigit(*cp)) { errno = 0; v = strtoul(cp, &endp, 10); if (errno != 0 || *endp != '\0') v = FSMAXTYPES; } 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: case FS_BSDFFS: case FS_BSDLFS: /* 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; if (tp != NULL) NXTNUM(pp->p_cpg); } /* else default to 0's */ break; default: break; } return (0); } /* * Check disklabel for errors and fill in * derived fields according to supplied values. */ static int checklabel(struct disklabel *lp) { struct partition *pp; int i, errors = 0; char part; u_long base_offset, needed, total_size, total_percent, current_offset; long free_space; int seen_default_offset; int hog_part; int j; struct partition *pp2; if (lp == NULL) lp = &lab; if (allfields) { 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) warnx("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) warnx("boot block size %% sector-size != 0"); if (lp->d_npartitions > MAXPARTITIONS) { warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", (u_long)lp->d_npartitions, MAXPARTITIONS); errors++; } if (lp->d_npartitions < DEFPARTITIONS) { warnx("number of partitions (%lu) < DEFPARTITIONS (%d)", (u_long)lp->d_npartitions, DEFPARTITIONS); errors++; } } else { struct disklabel *vl; vl = getvirginlabel(); if (lp->d_secsize == 0) lp->d_secsize = vl->d_secsize; if (lp->d_nsectors == 0) lp->d_nsectors = vl->d_nsectors; if (lp->d_ntracks == 0) lp->d_ntracks = vl->d_ntracks; if (lp->d_ncylinders == 0) lp->d_ncylinders = vl->d_ncylinders; if (lp->d_rpm == 0) lp->d_rpm = vl->d_rpm; if (lp->d_interleave == 0) lp->d_interleave = vl->d_interleave; if (lp->d_secpercyl == 0) lp->d_secpercyl = vl->d_secpercyl; if (lp->d_secperunit == 0) lp->d_secperunit = vl->d_secperunit; if (lp->d_bbsize == 0) lp->d_bbsize = vl->d_bbsize; if (lp->d_npartitions < DEFPARTITIONS || lp->d_npartitions > MAXPARTITIONS) lp->d_npartitions = vl->d_npartitions; } /* 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) warnx("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 't': case 'T': size *= 1024ULL; /* FALLTHROUGH */ case 'g': case 'G': size *= 1024ULL; /* FALLTHROUGH */ case 'm': case 'M': size *= 1024ULL; /* FALLTHROUGH */ case 'k': case 'K': size *= 1024ULL; break; case '\0': break; default: warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", part_size_type[i], i + 'a'); 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) warnx("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; } } } } /* Find out the total free space, excluding the boot block area. */ base_offset = BBSIZE / secsize; free_space = 0; for (i = 0; i < lp->d_npartitions; i++) { pp = &lp->d_partitions[i]; if (!part_set[i] || i == RAW_PART || part_size_type[i] == '%' || part_size_type[i] == '*') continue; if (pp->p_offset > base_offset) free_space += pp->p_offset - base_offset; if (pp->p_offset + pp->p_size > base_offset) base_offset = pp->p_offset + pp->p_size; } if (base_offset < lp->d_secperunit) free_space += lp->d_secperunit - base_offset; /* handle % partitions - note %'s don't need to add up to 100! */ if (total_percent != 0) { 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) { /* * Find the range of offsets usable by '*' partitions around * the hog partition and how much space they need. */ needed = 0; base_offset = BBSIZE / secsize; for (i = hog_part - 1; i >= 0; i--) { pp = &lp->d_partitions[i]; if (!part_set[i] || i == RAW_PART) continue; if (part_offset_type[i] == '*') { needed += pp->p_size; continue; } base_offset = pp->p_offset + pp->p_size; break; } current_offset = lp->d_secperunit; for (i = lp->d_npartitions - 1; i > hog_part; i--) { pp = &lp->d_partitions[i]; if (!part_set[i] || i == RAW_PART) continue; if (part_offset_type[i] == '*') { needed += pp->p_size; continue; } current_offset = pp->p_offset; } if (current_offset - base_offset <= needed) { fprintf(stderr, "Cannot find space for partition %c\n", hog_part + 'a'); fprintf(stderr, "Need more than %lu sectors between %lu and %lu\n", needed, base_offset, current_offset); errors++; lp->d_partitions[hog_part].p_size = 0; } else { lp->d_partitions[hog_part].p_size = current_offset - base_offset - needed; total_size += lp->d_partitions[hog_part].p_size; } } /* Now set the offsets for each partition */ current_offset = BBSIZE / secsize; /* 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 */ warnx( "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) warnx("partition %c: size 0, but offset %lu", part, (u_long)pp->p_offset); #ifdef notdef if (pp->p_size % lp->d_secpercyl) warnx("partition %c: size %% cylinder-size != 0", part); if (pp->p_offset % lp->d_secpercyl) warnx("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) warnx("partition %c is not marked as unused!",part); if (pp->p_offset != 0) warnx("partition %c doesn't start at 0!",part); if (pp->p_size != lp->d_secperunit) warnx("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)) { warnx("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 < lp->d_npartitions; i++) { part = 'a' + i; pp = &lp->d_partitions[i]; if (pp->p_size || pp->p_offset) warnx("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. */ static struct disklabel * getvirginlabel(void) { static struct disklabel loclab; struct partition *dp; int f; u_int u; if ((f = open(specname, O_RDONLY)) == -1) { warn("cannot open %s", specname); return (NULL); } if (is_file) get_file_parms(f); else { mediasize = g_mediasize(f); secsize = g_sectorsize(f); if (secsize < 0 || mediasize < 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 enlightened days uses the CHS geometry for * anything, but nonetheless 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 = DEFPARTITIONS; /* 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); } static 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: bsdlabel disk", "\t\t(to read label)", " bsdlabel -w [-n] [-m machine] disk [type]", "\t\t(to write label with existing boot program)", " bsdlabel -e [-n] [-m machine] disk", "\t\t(to edit label)", " bsdlabel -R [-n] [-m machine] disk protofile", "\t\t(to restore label with existing boot program)", " bsdlabel -B [-b boot] [-m machine] disk", "\t\t(to install boot program with existing on-disk label)", " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", "\t\t(to write label and install boot program)", " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", "\t\t(to restore label and install boot program)" ); exit(1); }