/* $NetBSD: main.c,v 1.17 2007/06/05 21:48:46 dyoung Exp $ */ /* * Copyright (c) 2006 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Julio M. Merino Vidal. * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * 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. 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. */ #if HAVE_NBTOOL_CONFIG_H #include "nbtool_config.h" #endif #include #ifndef lint __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 8.4 (Berkeley) 5/4/95"; /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ #else __RCSID("$NetBSD: main.c,v 1.17 2007/06/05 21:48:46 dyoung Exp $"); #endif #endif /* not lint */ #include #include #include #include #define DKTYPENAMES #define FSTYPENAMES #include #include #include #include #include #include #include #include #include #include #include #if HAVE_NBTOOL_CONFIG_H #include #include #include #include "../../include/disktab.h" #else #include #include #include #include #include #include #endif /* HAVE_NBTOOL_CONFIG_H */ #include "pathnames.h" #include "extern.h" #include "dkcksum.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 #define DISKMAGIC_REV bswap32(DISKMAGIC) /* To delete a label, we just invert the magic numbers */ #define DISKMAGIC_DELETED (~DISKMAGIC) #define DISKMAGIC_DELETED_REV bswap32(~DISKMAGIC) #define DEFEDITOR _PATH_VI char specname[MAXPATHLEN]; /* Some global data, all too hard to pass about */ char bootarea[BBSIZE]; /* Buffer matching part of disk */ int bootarea_len; /* Number of bytes we actually read */ static struct disklabel lab; /* The label we have updated */ static int Aflag; /* Action all labels */ static int Fflag; /* Read/write from file */ static int rflag; /* Read/write direct from disk */ static int tflag; /* Format output as disktab */ int Cflag; /* CHS format output */ static int Dflag; /* Delete old labels (use with write) */ static int Iflag; /* Read/write direct, but default if absent */ static int lflag; /* List all known file system types and exit */ static int mflag; /* Expect disk to contain an MBR */ static int verbose; static int read_all; /* set if op = READ && Aflag */ static int write_label(int); static int readlabel_direct(int); static void writelabel_direct(int); static int update_label(int, u_int, u_int); static struct disklabel *find_label(int, u_int); static void makedisktab(FILE *, struct disklabel *); static void makelabel(const char *, const char *); static void l_perror(const char *); static void readlabel(int); static int edit(int); static int editit(const char *); static char *skip(char *); static char *word(char *); static int getasciilabel(FILE *, struct disklabel *); static void usage(void); static int qsort_strcmp(const void *, const void *); static int getulong(const char *, char, char **, unsigned long *, unsigned long); #define GETNUM32(a, v) getulong(a, '\0', NULL, v, UINT32_MAX) #define GETNUM16(a, v) getulong(a, '\0', NULL, v, UINT16_MAX) #define GETNUM8(a, v) getulong(a, '\0', NULL, v, UINT8_MAX) static int set_writable_fd = -1; #if HAVE_NBTOOL_CONFIG_H #define GETLABELOFFSET() LABELOFFSET #define GETLABELSECTOR() LABELSECTOR #else /* HAVE_NBTOOL_CONFIG_H */ #define GETLABELOFFSET() getlabeloffset() #define GETLABELSECTOR() getlabelsector() #endif /* Default location for label - only used if we don't find one to update */ #define LABEL_OFFSET (dklabel_getlabelsector() * DEV_BSIZE + dklabel_getlabeloffset()) /* * For portability it doesn't make sense to use any other value.... * Except, maybe, the size of a physical sector. * This value is used if we have to write a label to the start of an mbr ptn. */ #ifndef LABELOFFSET_MBR #define LABELOFFSET_MBR 512 #endif #if HAVE_NBTOOL_CONFIG_H static int opendisk(const char *path, int flags, char *buf, int buflen, int cooked) { int f; f = open(path, flags, 0); strlcpy(buf, path, buflen); return f; } static int dk_ioctl(int f, void *arg) { errno = ENOTTY; return -1; } #define dk_ioctl(f, cmd, arg) dk_ioctl(f, arg) #else #define dk_ioctl(f, cmd, arg) ioctl(f, cmd, arg) #endif /* HAVE_NBTOOL_CONFIG_H */ static daddr_t dklabel_getlabelsector(void) { unsigned long int nval; char *end; const char *val; if ((val = getenv("DISKLABELSECTOR")) == NULL) return GETLABELSECTOR(); if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE) err(EXIT_FAILURE, "DISKLABELSECTOR in environment"); return nval; } static off_t dklabel_getlabeloffset(void) { unsigned long int nval; char *end; const char *val; if ((val = getenv("DISKLABELOFFSET")) == NULL) return GETLABELOFFSET(); if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE) err(EXIT_FAILURE, "DISKLABELOFFSET in environment"); return nval; } static void clear_writable(void) { static int zero = 0; dk_ioctl(set_writable_fd, DIOCWLABEL, &zero); } int main(int argc, char *argv[]) { FILE *t; int ch, f, error; char *dkname; struct stat sb; int writable; enum { UNSPEC, EDIT, READ, RESTORE, SETWRITABLE, SETREADONLY, WRITE, INTERACT, DELETE } op = UNSPEC, old_op; #ifdef USE_MBR mflag = 1; #endif #if HAVE_NBTOOL_CONFIG_H /* We must avoid doing any ioctl requests */ Fflag = rflag = 1; #endif error = 0; while ((ch = getopt(argc, argv, "ACDFINRWb:ef:ilmrs:tvw")) != -1) { old_op = op; switch (ch) { case 'A': /* Action all labels */ Aflag = 1; rflag = 1; break; case 'C': /* Display in CHS format */ Cflag = 1; break; case 'D': /* Delete all existing labels */ Dflag = 1; rflag = 1; break; case 'F': /* Treat 'disk' as a regular file */ Fflag = 1; rflag = 1; /* Force direct access */ break; case 'I': /* Use default label if none found */ Iflag = 1; rflag = 1; /* Implies direct access */ break; case 'R': /* Restore label from text file */ op = RESTORE; break; case 'N': /* Disallow writes to label sector */ op = SETREADONLY; break; case 'W': /* Allow writes to label sector */ op = SETWRITABLE; break; case 'e': /* Edit label with $EDITOR */ op = EDIT; break; case 'f': /* Name of disktab file */ if (setdisktab(optarg) == -1) usage(); break; case 'i': /* Edit using built-in editor */ op = INTERACT; break; case 'l': /* List all known file system types and exit */ lflag = 1; break; case 'm': /* Expect disk to have an MBR */ mflag ^= 1; break; case 'r': /* Read/write label directly from disk */ rflag = 1; break; case 't': /* Format output as a disktab entry */ tflag = 1; break; case 'v': /* verbose/diag output */ verbose++; break; case 'w': /* Write label based on disktab entry */ op = WRITE; break; case '?': default: usage(); } if (old_op != UNSPEC && old_op != op) usage(); } argc -= optind; argv += optind; if (lflag) exit(list_fs_types() ? EXIT_SUCCESS : EXIT_FAILURE); if (op == UNSPEC) op = Dflag ? DELETE : READ; if (argc < 1) usage(); if (Iflag && op != EDIT && op != INTERACT) usage(); dkname = argv[0]; f = opendisk(dkname, op == READ ? O_RDONLY : O_RDWR, specname, sizeof specname, 0); if (f < 0) err(4, "%s", specname); if (!Fflag && fstat(f, &sb) == 0 && S_ISREG(sb.st_mode)) Fflag = rflag = 1; switch (op) { case DELETE: /* Remove all existing labels */ if (argc != 1) usage(); Dflag = 2; writelabel_direct(f); break; case EDIT: if (argc != 1) usage(); readlabel(f); error = edit(f); break; case INTERACT: if (argc != 1) usage(); readlabel(f); /* * XXX: Fill some default values so checklabel does not fail */ if (lab.d_bbsize == 0) lab.d_bbsize = BBSIZE; if (lab.d_sbsize == 0) lab.d_sbsize = SBLOCKSIZE; interact(&lab, f); break; case READ: if (argc != 1) usage(); read_all = Aflag; readlabel(f); if (read_all) /* Label got printed in the bowels of readlabel */ break; if (tflag) makedisktab(stdout, &lab); else { showinfo(stdout, &lab, specname); showpartitions(stdout, &lab, Cflag); } error = checklabel(&lab); if (error) error += 100; break; case RESTORE: if (argc != 2) usage(); if (!(t = fopen(argv[1], "r"))) err(4, "%s", argv[1]); if (getasciilabel(t, &lab)) error = write_label(f); else error = 1; break; case SETREADONLY: writable = 0; goto do_diocwlabel; case SETWRITABLE: writable = 1; do_diocwlabel: if (argc != 1) usage(); if (dk_ioctl(f, DIOCWLABEL, &writable) < 0) err(4, "ioctl DIOCWLABEL"); break; case WRITE: /* Create label from /etc/disktab entry & write */ if (argc < 2 || argc > 3) usage(); makelabel(argv[1], argv[2]); if (checklabel(&lab) == 0) error = write_label(f); else error = 1; break; case UNSPEC: usage(); } exit(error); } /* * Construct a prototype disklabel from /etc/disktab. */ static void makelabel(const char *type, const char *name) { struct disklabel *dp; dp = getdiskbyname(type); if (dp == NULL) errx(1, "unknown disk type: %s", type); lab = *dp; /* d_packname is union d_boot[01], so zero */ (void)memset(lab.d_packname, 0, sizeof(lab.d_packname)); if (name) (void)strncpy(lab.d_packname, name, sizeof(lab.d_packname)); } static int write_label(int f) { int writable; lab.d_magic = DISKMAGIC; lab.d_magic2 = DISKMAGIC; lab.d_checksum = 0; lab.d_checksum = dkcksum(&lab); if (rflag) { /* Write the label directly to the disk */ /* * 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 (!Fflag && dk_ioctl(f, DIOCSDINFO, &lab) < 0 && errno != ENODEV && errno != ENOTTY) { l_perror("ioctl DIOCSDINFO"); return (1); } /* * write enable label sector before write (if necessary), * disable after writing. */ writable = 1; if (!Fflag) { if (dk_ioctl(f, DIOCWLABEL, &writable) < 0) perror("ioctl DIOCWLABEL"); set_writable_fd = f; atexit(clear_writable); } writelabel_direct(f); /* * Now issue a DIOCWDINFO. This will let the kernel convert the * disklabel to some machdep format if needed. */ /* XXX: This is stupid! */ if (!Fflag && dk_ioctl(f, DIOCWDINFO, &lab) < 0) { l_perror("ioctl DIOCWDINFO"); return (1); } } else { /* Get the kernel to write the label */ if (dk_ioctl(f, DIOCWDINFO, &lab) < 0) { l_perror("ioctl DIOCWDINFO"); return (1); } } #ifdef __vax__ if (lab.d_type == DTYPE_SMD && lab.d_flags & D_BADSECT && lab.d_secsize == 512) { /* Write the label to the odd sectors of the last track! */ daddr_t alt; int i; uint8_t sec0[512]; if (pread(f, sec0, 512, 0) < 512) { warn("read master label to write alternates"); return 0; } alt = lab.d_ncylinders * lab.d_secpercyl - lab.d_nsectors; for (i = 1; i < 11 && i < lab.d_nsectors; i += 2) { if (pwrite(f, sec0, 512, (off_t)(alt + i) * 512) < 512) warn("alternate label %d write", i/2); } } #endif /* __vax__ */ return 0; } int writelabel(int f, struct disklabel *lp) { if (lp != &lab) lab = *lp; return write_label(f); } static void l_perror(const char *s) { switch (errno) { case ESRCH: warnx("%s: No disk label on disk;\n" "use \"disklabel -I\" to install initial label", s); break; case EINVAL: warnx("%s: Label magic number or checksum is wrong!\n" "(disklabel or kernel is out of date?)", s); break; case EBUSY: warnx("%s: Open partition would move or shrink", s); break; case EXDEV: warnx("%s: Labeled partition or 'a' partition must start" " at beginning of disk", s); break; default: warn("%s", s); break; } } #ifdef NO_MBR_SUPPORT #define process_mbr(f, action) 1 #else /* * Scan DOS/MBR partition table and extended partition list for NetBSD ptns. */ static int process_mbr(int f, int (*action)(int, u_int)) { struct mbr_partition *dp; struct mbr_sector mbr; int rval = 1, res; int part; u_int ext_base, next_ext, this_ext, start; ext_base = 0; next_ext = 0; for (;;) { this_ext = next_ext; next_ext = 0; if (verbose > 1) warnx("reading mbr sector %u", this_ext); if (pread(f, &mbr, sizeof mbr, this_ext * (off_t)DEV_BSIZE) != sizeof(mbr)) { if (verbose) warn("Can't read master boot record %d", this_ext); break; } /* Check if table is valid. */ if (mbr.mbr_magic != htole16(MBR_MAGIC)) { if (verbose) warnx("Invalid signature in mbr record %d", this_ext); break; } dp = &mbr.mbr_parts[0]; /* Find NetBSD partition(s). */ for (part = 0; part < MBR_PART_COUNT; dp++, part++) { start = le32toh(dp->mbrp_start); switch (dp->mbrp_type) { #ifdef COMPAT_386BSD_MBRPART case MBR_PTYPE_386BSD: if (ext_base != 0) break; /* FALLTHROUGH */ #endif case MBR_PTYPE_NETBSD: res = action(f, this_ext + start); if (res <= 0) /* Found or failure */ return res; if (res > rval) /* Keep largest value */ rval = res; break; case MBR_PTYPE_EXT: case MBR_PTYPE_EXT_LBA: case MBR_PTYPE_EXT_LNX: next_ext = start; break; default: break; } } if (next_ext == 0) /* No more extended partitions */ break; next_ext += ext_base; if (ext_base == 0) ext_base = next_ext; if (next_ext <= this_ext) { if (verbose) warnx("Invalid extended chain %x <= %x", next_ext, this_ext); break; } /* Maybe we should check against the disk size... */ } return rval; } static int readlabel_mbr(int f, u_int sector) { struct disklabel *lp; lp = find_label(f, sector); if (lp == NULL) return 1; lab = *lp; return 0; } static int writelabel_mbr(int f, u_int sector) { return update_label(f, sector, mflag ? LABELOFFSET_MBR : ~0U) ? 2 : 0; } #endif /* !NO_MBR_SUPPORT */ #ifndef USE_ACORN #define get_filecore_partition(f) 0 #else /* * static int filecore_checksum(u_char *bootblock) * * Calculates the filecore boot block checksum. This is used to validate * a filecore boot block on the disk. If a boot block is validated then * it is used to locate the partition table. If the boot block is not * validated, it is assumed that the whole disk is NetBSD. * * The basic algorithm is: * * for (each byte in block, excluding checksum) { * sum += byte; * if (sum > 255) * sum -= 255; * } * * That's equivalent to summing all of the bytes in the block * (excluding the checksum byte, of course), then calculating the * checksum as "cksum = sum - ((sum - 1) / 255) * 255)". That * expression may or may not yield a faster checksum function, * but it's easier to reason about. * * Note that if you have a block filled with bytes of a single * value "X" (regardless of that value!) and calculate the cksum * of the block (excluding the checksum byte), you will _always_ * end up with a checksum of X. (Do the math; that can be derived * from the checksum calculation function!) That means that * blocks which contain bytes which all have the same value will * always checksum properly. That's a _very_ unlikely occurence * (probably impossible, actually) for a valid filecore boot block, * so we treat such blocks as invalid. */ static int filecore_checksum(u_char *bootblock) { u_char byte0, accum_diff; u_int sum; int i; sum = 0; accum_diff = 0; byte0 = bootblock[0]; /* * Sum the contents of the block, keeping track of whether * or not all bytes are the same. If 'accum_diff' ends up * being zero, all of the bytes are, in fact, the same. */ for (i = 0; i < 511; ++i) { sum += bootblock[i]; accum_diff |= bootblock[i] ^ byte0; } /* * Check to see if the checksum byte is the same as the * rest of the bytes, too. (Note that if all of the bytes * are the same except the checksum, a checksum compare * won't succeed, but that's not our problem.) */ accum_diff |= bootblock[i] ^ byte0; /* All bytes in block are the same; call it invalid. */ if (accum_diff == 0) return (-1); return (sum - ((sum - 1) / 255) * 255); } /* * Check for the presence of a RiscOS filecore boot block * indicating an ADFS file system on the disc. * Return the offset to the NetBSD part of the disc if * this can be determined. * This routine will terminate disklabel if the disc * is found to be ADFS only. */ static u_int get_filecore_partition(int f) { struct filecore_bootblock *fcbb; static u_char bb[DEV_BSIZE]; u_int offset; struct riscix_partition_table *riscix_part; int loop; if (pread(f, bb, sizeof(bb), (off_t)FILECORE_BOOT_SECTOR * DEV_BSIZE) != sizeof(bb)) err(4, "can't read filecore boot block"); fcbb = (struct filecore_bootblock *)bb; /* Check if table is valid. */ if (filecore_checksum(bb) != fcbb->checksum) return (0); /* * Check for NetBSD/arm32 (RiscBSD) partition marker. * If found the NetBSD disklabel location is easy. */ offset = (fcbb->partition_cyl_low + (fcbb->partition_cyl_high << 8)) * fcbb->heads * fcbb->secspertrack; switch (fcbb->partition_type) { case PARTITION_FORMAT_RISCBSD: return (offset); case PARTITION_FORMAT_RISCIX: /* * Read the RISCiX partition table and search for the * first partition named "RiscBSD", "NetBSD", or "Empty:" * * XXX is use of 'Empty:' really desirable?! -- cgd */ if (pread(f, bb, sizeof(bb), (off_t)offset * DEV_BSIZE) != sizeof(bb)) err(4, "can't read riscix partition table"); riscix_part = (struct riscix_partition_table *)bb; for (loop = 0; loop < NRISCIX_PARTITIONS; ++loop) { if (strcmp((char *)riscix_part->partitions[loop].rp_name, "RiscBSD") == 0 || strcmp((char *)riscix_part->partitions[loop].rp_name, "NetBSD") == 0 || strcmp((char *)riscix_part->partitions[loop].rp_name, "Empty:") == 0) { return riscix_part->partitions[loop].rp_start; break; } } /* * Valid filecore boot block, RISCiX partition table * but no NetBSD partition. We should leave this * disc alone. */ errx(4, "cannot label: no NetBSD partition found" " in RISCiX partition table"); default: /* * Valid filecore boot block and no non-ADFS partition. * This means that the whole disc is allocated for ADFS * so do not trash ! If the user really wants to put a * NetBSD disklabel on the disc then they should remove * the filecore boot block first with dd. */ errx(4, "cannot label: filecore-only disk" " (no non-ADFS partition)"); } return (0); } #endif /* USE_ACORN */ /* * Fetch disklabel for disk to 'lab'. * Use ioctl to get label unless -r flag is given. */ static void readlabel(int f) { if (rflag) { /* Get label directly from disk */ if (readlabel_direct(f) == 0) return; /* * There was no label on the disk. Get the fictious one * as a basis for initialisation. */ if (!Fflag && Iflag && (dk_ioctl(f, DIOCGDINFO, &lab) == 0 || dk_ioctl(f, DIOCGDEFLABEL, &lab) == 0)) return; } else { /* Get label from kernel. */ if (dk_ioctl(f, DIOCGDINFO, &lab) < 0) err(4, "ioctl DIOCGDINFO"); return; } if (read_all == 2) /* We actually found one, and printed it... */ exit(0); errx(1, "could not read existing label"); } /* * Reading the label from the disk is largely a case of 'hunt the label'. * and since different architectures default to different places there * could even be more than one label that contradict each other! * For now we look in the expected place, then search through likely * other locations. */ static struct disklabel * find_label(int f, u_int sector) { struct disklabel *lp; int i, offset; const char *is_deleted; bootarea_len = pread(f, bootarea, sizeof bootarea, sector * (off_t)DEV_BSIZE); if (bootarea_len <= 0) { if (verbose) warn("failed to read bootarea from sector %u", sector); return NULL; } if (verbose > 2) warnx("read sector %u len %u looking for label", sector, bootarea_len); /* Check expected offset first */ for (offset = LABEL_OFFSET, i = -4;; offset = i += 4) { is_deleted = ""; lp = (void *)(bootarea + offset); if (i == LABEL_OFFSET) continue; if ((char *)(lp + 1) > bootarea + bootarea_len) break; if (lp->d_magic2 != lp->d_magic) continue; if (read_all && (lp->d_magic == DISKMAGIC_DELETED || lp->d_magic == DISKMAGIC_DELETED_REV)) { lp->d_magic ^= ~0u; lp->d_magic2 ^= ~0u; is_deleted = "deleted "; } if (lp->d_magic != DISKMAGIC) { /* XXX: Do something about byte-swapped labels ? */ if (lp->d_magic == DISKMAGIC_REV && lp->d_magic2 == DISKMAGIC_REV) warnx("ignoring %sbyteswapped label" " at offset %u from sector %u", is_deleted, offset, sector); continue; } if (lp->d_npartitions > MAXPARTITIONS || dkcksum(lp) != 0) { if (verbose > 0) warnx("corrupt label found at offset %u in " "sector %u", offset, sector); continue; } if (verbose > 1) warnx("%slabel found at offset %u from sector %u", is_deleted, offset, sector); if (!read_all) return lp; /* To print all the labels we have to do it here */ /* XXX: maybe we should compare them? */ printf("# %ssector %u offset %u bytes\n", is_deleted, sector, offset); if (tflag) makedisktab(stdout, lp); else { showinfo(stdout, lp, specname); showpartitions(stdout, lp, Cflag); } checklabel(lp); /* Remember we've found a label */ read_all = 2; } return NULL; } static void write_bootarea(int f, u_int sector) { int wlen; if (bootarea_len <= 0) errx(1, "attempting to write after failed read"); #ifdef __alpha__ /* * The Alpha requires that the boot block be checksummed. * The NetBSD/alpha disklabel.h provides a macro to do it. */ if (sector == 0) { struct alpha_boot_block *bb; bb = (struct alpha_boot_block *)(void *)bootarea; bb->bb_cksum = 0; ALPHA_BOOT_BLOCK_CKSUM(bb, &bb->bb_cksum); } #endif /* __alpha__ */ wlen = pwrite(f, bootarea, bootarea_len, sector * (off_t)DEV_BSIZE); if (wlen == bootarea_len) return; if (wlen == -1) err(1, "disklabel write (sector %u) size %u failed", sector, bootarea_len); errx(1, "disklabel write (sector %u) size %u truncated to %d", sector, bootarea_len, wlen); } static int update_label(int f, u_int label_sector, u_int label_offset) { struct disklabel *disk_lp; disk_lp = find_label(f, label_sector); if (disk_lp && Dflag) { /* Invalidate the existing label */ disk_lp->d_magic ^= ~0u; disk_lp->d_magic2 ^= ~0u; if (Dflag == 2) write_bootarea(f, label_sector); /* Force label to default location */ disk_lp = NULL; } if (Dflag == 2) /* We are just deleting the label */ return 0; if (disk_lp == NULL) { if (label_offset == ~0u) return 0; /* Nothing on the disk - we need to add it */ disk_lp = (void *)(bootarea + label_offset); if ((char *)(disk_lp + 1) > bootarea + bootarea_len) errx(1, "no space in bootarea (sector %u) " "to create label", label_sector); } *disk_lp = lab; write_bootarea(f, label_sector); return 1; } static void writelabel_direct(int f) { u_int label_sector; int written = 0; int rval; label_sector = get_filecore_partition(f); if (label_sector != 0) /* The offset needs to be that from the acorn ports... */ written = update_label(f, label_sector, DEV_BSIZE); rval = process_mbr(f, writelabel_mbr); if (rval == 2 || written) /* Don't add a label to sector 0, but update one if there */ update_label(f, 0, ~0u); else update_label(f, 0, LABEL_OFFSET); } static int readlabel_direct(int f) { struct disklabel *disk_lp; u_int filecore_partition_offset; filecore_partition_offset = get_filecore_partition(f); if (filecore_partition_offset != 0) { disk_lp = find_label(f, filecore_partition_offset); if (disk_lp != NULL) { lab = *disk_lp; return 0; } } if (mflag && process_mbr(f, readlabel_mbr) == 0) return 0; disk_lp = find_label(f, 0); if (disk_lp != NULL) { lab = *disk_lp; return 0; } if (!mflag && process_mbr(f, readlabel_mbr) == 0) return 0; return 1; } static void makedisktab(FILE *f, struct disklabel *lp) { int i; const char *did; struct partition *pp; did = "\\\n\t:"; (void) fprintf(f, "%.*s|Automatically generated label:\\\n\t:dt=", (int) sizeof(lp->d_typename), lp->d_typename); if ((unsigned) lp->d_type < DKMAXTYPES) (void) fprintf(f, "%s:", dktypenames[lp->d_type]); else (void) fprintf(f, "unknown%d:", lp->d_type); (void) fprintf(f, "se#%d:", lp->d_secsize); (void) fprintf(f, "ns#%d:", lp->d_nsectors); (void) fprintf(f, "nt#%d:", lp->d_ntracks); (void) fprintf(f, "sc#%d:", lp->d_secpercyl); (void) fprintf(f, "nc#%d:", lp->d_ncylinders); if ((lp->d_secpercyl * lp->d_ncylinders) != lp->d_secperunit) { (void) fprintf(f, "%ssu#%d:", did, lp->d_secperunit); did = ""; } if (lp->d_rpm != 3600) { (void) fprintf(f, "%srm#%d:", did, lp->d_rpm); did = ""; } if (lp->d_interleave != 1) { (void) fprintf(f, "%sil#%d:", did, lp->d_interleave); did = ""; } if (lp->d_trackskew != 0) { (void) fprintf(f, "%ssk#%d:", did, lp->d_trackskew); did = ""; } if (lp->d_cylskew != 0) { (void) fprintf(f, "%scs#%d:", did, lp->d_cylskew); did = ""; } if (lp->d_headswitch != 0) { (void) fprintf(f, "%shs#%d:", did, lp->d_headswitch); did = ""; } if (lp->d_trkseek != 0) { (void) fprintf(f, "%sts#%d:", did, lp->d_trkseek); did = ""; } #ifdef notyet (void) 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++) (void) fprintf(f, "%d ", lp->d_drivedata[j]); #endif /* notyet */ pp = lp->d_partitions; for (i = 0; i < lp->d_npartitions; i++, pp++) { if (pp->p_size) { char c = 'a' + i; (void) fprintf(f, "\\\n\t:"); (void) fprintf(f, "p%c#%d:", c, pp->p_size); (void) fprintf(f, "o%c#%d:", c, pp->p_offset); if (pp->p_fstype != FS_UNUSED) { if ((unsigned) pp->p_fstype < FSMAXTYPES) (void) fprintf(f, "t%c=%s:", c, fstypenames[pp->p_fstype]); else (void) fprintf(f, "t%c=unknown%d:", c, pp->p_fstype); } switch (pp->p_fstype) { case FS_UNUSED: break; case FS_BSDFFS: case FS_BSDLFS: case FS_EX2FS: case FS_ADOS: case FS_APPLEUFS: (void) fprintf(f, "b%c#%d:", c, pp->p_fsize * pp->p_frag); (void) fprintf(f, "f%c#%d:", c, pp->p_fsize); break; default: break; } } } (void) fprintf(f, "\n"); (void) fflush(f); } static int edit(int f) { const char *tmpdir; char tmpfil[MAXPATHLEN]; int first, ch, fd; int get_ok; FILE *fp; if ((tmpdir = getenv("TMPDIR")) == NULL) tmpdir = _PATH_TMP; (void)snprintf(tmpfil, sizeof(tmpfil), "%s/%s", tmpdir, TMPFILE); if ((fd = mkstemp(tmpfil)) == -1 || (fp = fdopen(fd, "w")) == NULL) { warn("%s", tmpfil); return (1); } (void)fchmod(fd, 0600); showinfo(fp, &lab, specname); showpartitions(fp, &lab, Cflag); (void) fclose(fp); for (;;) { if (!editit(tmpfil)) break; fp = fopen(tmpfil, "r"); if (fp == NULL) { warn("%s", tmpfil); break; } (void) memset(&lab, 0, sizeof(lab)); get_ok = getasciilabel(fp, &lab); fclose(fp); if (get_ok && write_label(f) == 0) { (void) unlink(tmpfil); return (0); } (void) printf("re-edit the label? [y]: "); (void) fflush(stdout); first = ch = getchar(); while (ch != '\n' && ch != EOF) ch = getchar(); if (first == 'n' || first == 'N') break; } (void)unlink(tmpfil); return (1); } static int editit(const char *tmpfil) { int pid, xpid; int status; sigset_t nsigset, osigset; sigemptyset(&nsigset); sigaddset(&nsigset, SIGINT); sigaddset(&nsigset, SIGQUIT); sigaddset(&nsigset, SIGHUP); sigprocmask(SIG_BLOCK, &nsigset, &osigset); while ((pid = fork()) < 0) { if (errno != EAGAIN) { sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); warn("fork"); return (0); } sleep(1); } if (pid == 0) { const char *ed; char *buf; int retval; sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); setgid(getgid()); setuid(getuid()); if ((ed = getenv("EDITOR")) == (char *)0) ed = DEFEDITOR; /* * Jump through a few extra hoops in case someone's editor * is "editor arg1 arg2". */ asprintf(&buf, "%s %s", ed, tmpfil); if (!buf) err(1, "malloc"); retval = execlp(_PATH_BSHELL, _PATH_BSHELL, "-c", buf, NULL); if (retval == -1) perror(ed); exit(retval); } while ((xpid = wait(&status)) >= 0) if (xpid == pid) break; sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); return (!status); } static char * skip(char *cp) { cp += strspn(cp, " \t"); if (*cp == '\0') return (NULL); return (cp); } static char * word(char *cp) { if (cp == NULL || *cp == '\0') return (NULL); cp += strcspn(cp, " \t"); if (*cp == '\0') return (NULL); *cp++ = '\0'; cp += strspn(cp, " \t"); if (*cp == '\0') return (NULL); return (cp); } #define _CHECKLINE \ if (tp == NULL || *tp == '\0') { \ warnx("line %d: too few fields", lineno); \ errors++; \ break; \ } #define __CHECKLINE \ if (*tp == NULL || **tp == '\0') { \ warnx("line %d: too few fields", lineno); \ *tp = _error_; \ return 0; \ } static char _error_[] = ""; #define NXTNUM(n) if ((n = nxtnum(&tp, lineno),0) + tp != _error_) \ ; else goto error #define NXTXNUM(n) if ((n = nxtxnum(&tp, lp, lineno),0) + tp != _error_) \ ; else goto error static unsigned long nxtnum(char **tp, int lineno) { char *cp; unsigned long v; __CHECKLINE if (getulong(*tp, '\0', &cp, &v, UINT32_MAX) != 0) { warnx("line %d: syntax error", lineno); *tp = _error_; return 0; } *tp = cp; return v; } static unsigned long nxtxnum(char **tp, struct disklabel *lp, int lineno) { char *cp, *ncp; unsigned long n, v; __CHECKLINE cp = *tp; if (getulong(cp, '/', &ncp, &n, UINT32_MAX) != 0) goto bad; if (*ncp == '/') { n *= lp->d_secpercyl; cp = ncp + 1; if (getulong(cp, '/', &ncp, &v, UINT32_MAX) != 0) goto bad; n += v * lp->d_nsectors; cp = ncp + 1; if (getulong(cp, '\0', &ncp, &v, UINT32_MAX) != 0) goto bad; n += v; } *tp = ncp; return n; bad: warnx("line %d: invalid format", lineno); *tp = _error_; return 0; } /* * Read an ascii label in from fd f, * in the same format as that put out by showinfo() and showpartitions(), * and fill in lp. */ static int getasciilabel(FILE *f, struct disklabel *lp) { const char *const *cpp, *s; struct partition *pp; char *cp, *tp, line[BUFSIZ], tbuf[15]; int lineno, errors; unsigned long v; unsigned int part; lineno = 0; errors = 0; lp->d_bbsize = BBSIZE; /* XXX */ lp->d_sbsize = SBLOCKSIZE; /* XXX */ while (fgets(line, sizeof(line) - 1, f)) { lineno++; if ((cp = strpbrk(line, "#\r\n")) != NULL) *cp = '\0'; cp = skip(line); if (cp == NULL) /* blank line or comment line */ continue; tp = strchr(cp, ':'); /* everything has a colon in it */ if (tp == NULL) { warnx("line %d: syntax error", lineno); errors++; continue; } *tp++ = '\0', tp = skip(tp); if (!strcmp(cp, "type")) { if (tp == NULL) { strlcpy(tbuf, "unknown", sizeof(tbuf)); tp = tbuf; } cpp = dktypenames; for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) if ((s = *cpp) && !strcasecmp(s, tp)) { lp->d_type = cpp - dktypenames; goto next; } if (GETNUM16(tp, &v) != 0) { warnx("line %d: syntax error", lineno); errors++; continue; } if (v >= DKMAXTYPES) warnx("line %d: warning, unknown disk type: %s", lineno, tp); lp->d_type = v; continue; } if (!strcmp(cp, "flags")) { for (v = 0; (cp = tp) && *cp != '\0';) { tp = word(cp); if (!strcasecmp(cp, "removable")) v |= D_REMOVABLE; else if (!strcasecmp(cp, "ecc")) v |= D_ECC; else if (!strcasecmp(cp, "badsect")) v |= D_BADSECT; else { warnx("line %d: bad flag: %s", lineno, cp); errors++; } } lp->d_flags = v; continue; } if (!strcmp(cp, "drivedata")) { int i; for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { if (GETNUM32(cp, &v) != 0) { warnx("line %d: bad drive data", lineno); errors++; } else lp->d_drivedata[i] = v; i++; tp = word(cp); } continue; } if (sscanf(cp, "%lu partitions", &v) == 1) { if (v == 0 || v > MAXPARTITIONS) { warnx("line %d: bad # of partitions", lineno); lp->d_npartitions = MAXPARTITIONS; errors++; } else lp->d_npartitions = v; continue; } if (tp == NULL) { tbuf[0] = '\0'; tp = tbuf; } 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")) { if (GETNUM32(tp, &v) != 0 || v <= 0 || (v % 512) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_secsize = v; continue; } if (!strcmp(cp, "sectors/track")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_nsectors = v; continue; } if (!strcmp(cp, "sectors/cylinder")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_secpercyl = v; continue; } if (!strcmp(cp, "tracks/cylinder")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_ntracks = v; continue; } if (!strcmp(cp, "cylinders")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_ncylinders = v; continue; } if (!strcmp(cp, "total sectors") || !strcmp(cp, "sectors/unit")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_secperunit = v; continue; } if (!strcmp(cp, "rpm")) { if (GETNUM16(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_rpm = v; continue; } if (!strcmp(cp, "interleave")) { if (GETNUM16(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_interleave = v; continue; } if (!strcmp(cp, "trackskew")) { if (GETNUM16(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_trackskew = v; continue; } if (!strcmp(cp, "cylinderskew")) { if (GETNUM16(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_cylskew = v; continue; } if (!strcmp(cp, "headswitch")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_headswitch = v; continue; } if (!strcmp(cp, "track-to-track seek")) { if (GETNUM32(tp, &v) != 0) { warnx("line %d: bad %s: %s", lineno, cp, tp); errors++; } else lp->d_trkseek = v; continue; } if ('a' > *cp || *cp > 'z' || cp[1] != '\0') { warnx("line %d: unknown field: %s", lineno, cp); errors++; continue; } /* We have a partition entry */ part = *cp - 'a'; if (part >= MAXPARTITIONS) { warnx("line %d: bad partition name: %s", lineno, cp); errors++; continue; } pp = &lp->d_partitions[part]; NXTXNUM(pp->p_size); NXTXNUM(pp->p_offset); /* can't use word() here because of blanks in fstypenames[] */ tp += strspn(tp, " \t"); _CHECKLINE cp = tp; cpp = fstypenames; for (; cpp < &fstypenames[FSMAXTYPES]; cpp++) { s = *cpp; if (s == NULL || (cp[strlen(s)] != ' ' && cp[strlen(s)] != '\t' && cp[strlen(s)] != '\0')) continue; if (!memcmp(s, cp, strlen(s))) { pp->p_fstype = cpp - fstypenames; tp += strlen(s); if (*tp == '\0') tp = NULL; else { tp += strspn(tp, " \t"); if (*tp == '\0') tp = NULL; } goto gottype; } } tp = word(cp); if (isdigit(*cp & 0xff)) { if (GETNUM8(cp, &v) != 0) { warnx("line %d: syntax error", lineno); errors++; } } else v = FSMAXTYPES; if ((unsigned)v >= FSMAXTYPES) { warnx("line %d: warning, unknown file system type: %s", lineno, cp); warnx("tip: use -l to see all valid file system " "types"); v = FS_UNUSED; } pp->p_fstype = v; gottype: switch (pp->p_fstype) { case FS_UNUSED: /* XXX */ NXTNUM(pp->p_fsize); if (pp->p_fsize == 0) break; NXTNUM(v); pp->p_frag = v / pp->p_fsize; break; case FS_BSDFFS: case FS_ADOS: case FS_APPLEUFS: NXTNUM(pp->p_fsize); if (pp->p_fsize == 0) break; NXTNUM(v); pp->p_frag = v / pp->p_fsize; NXTNUM(pp->p_cpg); break; case FS_BSDLFS: NXTNUM(pp->p_fsize); if (pp->p_fsize == 0) break; NXTNUM(v); pp->p_frag = v / pp->p_fsize; NXTNUM(pp->p_sgs); break; case FS_EX2FS: NXTNUM(pp->p_fsize); if (pp->p_fsize == 0) break; NXTNUM(v); pp->p_frag = v / pp->p_fsize; break; case FS_ISO9660: NXTNUM(pp->p_cdsession); break; default: break; } continue; error: errors++; next: ; } errors += checklabel(lp); return (errors == 0); } /* * Check disklabel for errors and fill in * derived fields according to supplied values. */ int checklabel(struct disklabel *lp) { struct partition *pp, *qp; int i, j, errors; char part; errors = 0; if (lp->d_secsize == 0) { warnx("sector size %d", lp->d_secsize); return (1); } if (lp->d_nsectors == 0) { warnx("sectors/track %d", lp->d_nsectors); return (1); } if (lp->d_ntracks == 0) { warnx("tracks/cylinder %d", lp->d_ntracks); return (1); } if (lp->d_ncylinders == 0) { warnx("cylinders/unit %d", lp->d_ncylinders); errors++; } if (lp->d_rpm == 0) warnx("warning, revolutions/minute %d", lp->d_rpm); 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) { warnx("boot block size %d", lp->d_bbsize); errors++; } else if (lp->d_bbsize % lp->d_secsize) warnx("warning, boot block size %% sector-size != 0"); if (lp->d_sbsize == 0) { warnx("super block size %d", lp->d_sbsize); errors++; } else if (lp->d_sbsize % lp->d_secsize) warnx("warning, super block size %% sector-size != 0"); if (lp->d_npartitions > MAXPARTITIONS) warnx("warning, number of partitions (%d) > MAXPARTITIONS (%d)", lp->d_npartitions, MAXPARTITIONS); else for (i = MAXPARTITIONS - 1; i >= lp->d_npartitions; i--) { part = 'a' + i; pp = &lp->d_partitions[i]; if (pp->p_size || pp->p_offset) { warnx("warning, partition %c increased " "number of partitions from %d to %d", part, lp->d_npartitions, i + 1); lp->d_npartitions = i + 1; break; } } 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("warning, partition %c: size 0, but offset %d", part, pp->p_offset); #ifdef STRICT_CYLINDER_ALIGNMENT if (pp->p_offset % lp->d_secpercyl) { warnx("warning, partition %c:" " not starting on cylinder boundary", part); errors++; } #endif /* STRICT_CYLINDER_ALIGNMENT */ if (pp->p_offset > lp->d_secperunit) { warnx("partition %c: offset past end of unit", part); errors++; } if (pp->p_offset + pp->p_size > lp->d_secperunit) { warnx("partition %c: partition extends" " past end of unit", part); errors++; } if (pp->p_fstype != FS_UNUSED) for (j = i + 1; j < lp->d_npartitions; j++) { qp = &lp->d_partitions[j]; if (qp->p_fstype == FS_UNUSED) continue; if (pp->p_offset < qp->p_offset + qp->p_size && qp->p_offset < pp->p_offset + pp->p_size) warnx("partitions %c and %c overlap", part, 'a' + j); } } return (errors); } static void usage(void) { static const struct { const char *name; const char *expn; } usages[] = { { "[-ACFrtv] disk", "(to read label)" }, { "-w [-DFrv] [-f disktab] disk disktype [packid]", "(to write label)" }, { "-e [-CDFIrv] disk", "(to edit label)" }, { "-i [-DFIrv] disk", "(to create a label interactively)" }, { "-D [-v] disk", "(to delete existing label(s))" }, { "-R [-DFrv] disk protofile", "(to restore label)" }, { "[-NW] disk", "(to write disable/enable label)" }, { "-l", "(to show all known file system types)" }, { NULL, NULL } }; int i; const char *pn = getprogname(); const char *t = "usage:"; for (i = 0; usages[i].name != NULL; i++) { (void)fprintf(stderr, "%s %s %s\n\t%s\n", t, pn, usages[i].name, usages[i].expn); t = "or"; } exit(1); } static int getulong(const char *str, char sep, char **epp, unsigned long *ul, unsigned long max) { char *ep; if (epp == NULL) epp = &ep; *ul = strtoul(str, epp, 10); if ((*ul == ULONG_MAX && errno == ERANGE) || *ul > max) return ERANGE; if (*str == '\0' || (**epp != '\0' && **epp != sep && !isspace((unsigned char)**epp))) return EFTYPE; return 0; } /* * This is a wrapper over the standard strcmp function to be used with * qsort on an array of pointers to strings. */ static int qsort_strcmp(const void *v1, const void *v2) { const char *const *sp1 = (const char *const *)v1; const char *const *sp2 = (const char *const *)v2; return strcmp(*sp1, *sp2); } /* * Prints all know file system types for a partition. * Returns 1 on success, 0 on failure. */ int list_fs_types(void) { int ret; size_t nelems; nelems = 0; { const char *const *namep; namep = fstypenames; while (*namep++ != NULL) nelems++; } ret = 1; if (nelems > 0) { const char **list; size_t i; list = (const char **)malloc(sizeof(char *) * nelems); if (list == NULL) { warnx("sorry, could not allocate memory for list"); ret = 0; } else { for (i = 0; i < nelems; i++) list[i] = fstypenames[i]; qsort(list, nelems, sizeof(char *), qsort_strcmp); for (i = 0; i < nelems; i++) (void)printf("%s\n", list[i]); free(list); } } return ret; }