/*- * Copyright (c) 2002 Marcel Moolenaar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * CRC32 code derived from work by Gary S. Brown. */ #include #ifdef __FBSDID __FBSDID("$FreeBSD: src/sbin/gpt/gpt.c,v 1.16 2006/07/07 02:44:23 marcel Exp $"); #endif #ifdef __RCSID __RCSID("$NetBSD: gpt.c,v 1.8 2008/02/24 18:38:10 christos Exp $"); #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __NetBSD__ #include #include #include #include #endif #include "map.h" #include "gpt.h" char device_path[MAXPATHLEN]; char *device_name; off_t mediasz; u_int parts; u_int secsz; int readonly, verbose; static uint32_t crc32_tab[] = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d }; uint32_t crc32(const void *buf, size_t size) { const uint8_t *p; uint32_t crc; p = buf; crc = ~0U; while (size--) crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); return crc ^ ~0U; } uint8_t * utf16_to_utf8(uint16_t *s16) { static uint8_t *s8 = NULL; static size_t s8len = 0; size_t s8idx, s16idx, s16len; uint32_t utfchar; unsigned int c; s16len = 0; while (s16[s16len++] != 0) ; if (s8len < s16len * 3) { if (s8 != NULL) free(s8); s8len = s16len * 3; s8 = calloc(s16len, 3); } s8idx = s16idx = 0; while (s16idx < s16len) { utfchar = le16toh(s16[s16idx++]); if ((utfchar & 0xf800) == 0xd800) { c = le16toh(s16[s16idx]); if ((utfchar & 0x400) != 0 || (c & 0xfc00) != 0xdc00) utfchar = 0xfffd; else s16idx++; } if (utfchar < 0x80) { s8[s8idx++] = utfchar; } else if (utfchar < 0x800) { s8[s8idx++] = 0xc0 | (utfchar >> 6); s8[s8idx++] = 0x80 | (utfchar & 0x3f); } else if (utfchar < 0x10000) { s8[s8idx++] = 0xe0 | (utfchar >> 12); s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f); s8[s8idx++] = 0x80 | (utfchar & 0x3f); } else if (utfchar < 0x200000) { s8[s8idx++] = 0xf0 | (utfchar >> 18); s8[s8idx++] = 0x80 | ((utfchar >> 12) & 0x3f); s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f); s8[s8idx++] = 0x80 | (utfchar & 0x3f); } } return (s8); } void utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len) { size_t s16idx, s8idx, s8len; uint32_t utfchar = 0; unsigned int c, utfbytes; s8len = 0; while (s8[s8len++] != 0) ; s8idx = s16idx = 0; utfbytes = 0; do { c = s8[s8idx++]; if ((c & 0xc0) != 0x80) { /* Initial characters. */ if (utfbytes != 0) { /* Incomplete encoding. */ s16[s16idx++] = 0xfffd; if (s16idx == s16len) { s16[--s16idx] = 0; return; } } if ((c & 0xf8) == 0xf0) { utfchar = c & 0x07; utfbytes = 3; } else if ((c & 0xf0) == 0xe0) { utfchar = c & 0x0f; utfbytes = 2; } else if ((c & 0xe0) == 0xc0) { utfchar = c & 0x1f; utfbytes = 1; } else { utfchar = c & 0x7f; utfbytes = 0; } } else { /* Followup characters. */ if (utfbytes > 0) { utfchar = (utfchar << 6) + (c & 0x3f); utfbytes--; } else if (utfbytes == 0) utfbytes = -1; } if (utfbytes == 0) { if (utfchar >= 0x10000 && s16idx + 2 >= s16len) utfchar = 0xfffd; if (utfchar >= 0x10000) { s16[s16idx++] = 0xd800 | ((utfchar>>10)-0x40); s16[s16idx++] = 0xdc00 | (utfchar & 0x3ff); } else s16[s16idx++] = utfchar; if (s16idx == s16len) { s16[--s16idx] = 0; return; } } } while (c != 0); } void le_uuid_dec(void const *buf, uuid_t *uuid) { u_char const *p; int i; p = buf; uuid->time_low = le32dec(p); uuid->time_mid = le16dec(p + 4); uuid->time_hi_and_version = le16dec(p + 6); uuid->clock_seq_hi_and_reserved = p[8]; uuid->clock_seq_low = p[9]; for (i = 0; i < _UUID_NODE_LEN; i++) uuid->node[i] = p[10 + i]; } void le_uuid_enc(void *buf, uuid_t const *uuid) { u_char *p; int i; p = buf; le32enc(p, uuid->time_low); le16enc(p + 4, uuid->time_mid); le16enc(p + 6, uuid->time_hi_and_version); p[8] = uuid->clock_seq_hi_and_reserved; p[9] = uuid->clock_seq_low; for (i = 0; i < _UUID_NODE_LEN; i++) p[10 + i] = uuid->node[i]; } int parse_uuid(const char *s, uuid_t *uuid) { uint32_t status; uuid_from_string(s, uuid, &status); if (status == uuid_s_ok) return (0); switch (*s) { case 'b': if (strcmp(s, "bios") == 0) { uuid_t bios = GPT_ENT_TYPE_BIOS; *uuid = bios; return (0); } break; case 'c': if (strcmp(s, "ccd") == 0) { uuid_t ccd = GPT_ENT_TYPE_NETBSD_CCD; *uuid = ccd; return (0); } else if (strcmp(s, "cgd") == 0) { uuid_t cgd = GPT_ENT_TYPE_NETBSD_CGD; *uuid = cgd; return (0); } break; case 'e': if (strcmp(s, "efi") == 0) { uuid_t efi = GPT_ENT_TYPE_EFI; *uuid = efi; return (0); } break; case 'h': if (strcmp(s, "hfs") == 0) { uuid_t hfs = GPT_ENT_TYPE_APPLE_HFS; *uuid = hfs; return (0); } break; case 'l': if (strcmp(s, "lfs") == 0) { uuid_t lfs = GPT_ENT_TYPE_NETBSD_LFS; *uuid = lfs; return (0); } else if (strcmp(s, "linux") == 0) { uuid_t lnx = GPT_ENT_TYPE_MS_BASIC_DATA; *uuid = lnx; return (0); } break; case 'r': if (strcmp(s, "raid") == 0) { uuid_t raid = GPT_ENT_TYPE_NETBSD_RAIDFRAME; *uuid = raid; return (0); } break; case 's': if (strcmp(s, "swap") == 0) { uuid_t sw = GPT_ENT_TYPE_NETBSD_SWAP; *uuid = sw; return (0); } break; case 'u': if (strcmp(s, "ufs") == 0) { uuid_t ufs = GPT_ENT_TYPE_NETBSD_FFS; *uuid = ufs; return (0); } break; case 'w': if (strcmp(s, "windows") == 0) { uuid_t win = GPT_ENT_TYPE_MS_BASIC_DATA; *uuid = win; return (0); } break; } return (EINVAL); } void* gpt_read(int fd, off_t lba, size_t count) { off_t ofs; void *buf; count *= secsz; buf = malloc(count); if (buf == NULL) return (NULL); ofs = lba * secsz; if (lseek(fd, ofs, SEEK_SET) == ofs && read(fd, buf, count) == (ssize_t)count) return (buf); free(buf); return (NULL); } int gpt_write(int fd, map_t *map) { off_t ofs; size_t count; count = map->map_size * secsz; ofs = map->map_start * secsz; if (lseek(fd, ofs, SEEK_SET) == ofs && write(fd, map->map_data, count) == (ssize_t)count) return (0); return (-1); } static int gpt_mbr(int fd, off_t lba) { struct mbr *mbr; map_t *m, *p; off_t size, start; unsigned int i, pmbr; mbr = gpt_read(fd, lba, 1); if (mbr == NULL) return (-1); if (mbr->mbr_sig != htole16(MBR_SIG)) { if (verbose) warnx("%s: MBR not found at sector %llu", device_name, (long long)lba); free(mbr); return (0); } /* * Differentiate between a regular MBR and a PMBR. This is more * convenient in general. A PMBR is one with a single partition * of type 0xee. */ pmbr = 0; for (i = 0; i < 4; i++) { if (mbr->mbr_part[i].part_typ == 0) continue; if (mbr->mbr_part[i].part_typ == 0xee) pmbr++; else break; } if (pmbr && i == 4 && lba == 0) { if (pmbr != 1) warnx("%s: Suspicious PMBR at sector %llu", device_name, (long long)lba); else if (verbose > 1) warnx("%s: PMBR at sector %llu", device_name, (long long)lba); p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr); return ((p == NULL) ? -1 : 0); } if (pmbr) warnx("%s: Suspicious MBR at sector %llu", device_name, (long long)lba); else if (verbose > 1) warnx("%s: MBR at sector %llu", device_name, (long long)lba); p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr); if (p == NULL) return (-1); for (i = 0; i < 4; i++) { if (mbr->mbr_part[i].part_typ == 0 || mbr->mbr_part[i].part_typ == 0xee) continue; start = le16toh(mbr->mbr_part[i].part_start_hi); start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo); size = le16toh(mbr->mbr_part[i].part_size_hi); size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo); if (start == 0 && size == 0) { warnx("%s: Malformed MBR at sector %llu", device_name, (long long)lba); continue; } /* start is relative to the offset of the MBR itself. */ start += lba; if (verbose > 2) warnx("%s: MBR part: type=%d, start=%llu, size=%llu", device_name, mbr->mbr_part[i].part_typ, (long long)start, (long long)size); if (mbr->mbr_part[i].part_typ != 15) { m = map_add(start, size, MAP_TYPE_MBR_PART, p); if (m == NULL) return (-1); m->map_index = i + 1; } else { if (gpt_mbr(fd, start) == -1) return (-1); } } return (0); } #ifdef __NetBSD__ static int drvctl(const char *name, u_int *sector_size, off_t *media_size) { prop_dictionary_t command_dict, args_dict, results_dict, data_dict, disk_info, geometry; prop_string_t string; prop_number_t number; int dfd, res; char *dname, *p; if ((dfd = open("/dev/drvctl", O_RDONLY)) == -1) { warn("%s: /dev/drvctl", __func__); return -1; } command_dict = prop_dictionary_create(); args_dict = prop_dictionary_create(); string = prop_string_create_cstring_nocopy("get-properties"); prop_dictionary_set(command_dict, "drvctl-command", string); prop_object_release(string); if ((dname = strdup(name[0] == 'r' ? name + 1 : name)) == NULL) { (void)close(dfd); return -1; } for (p = dname; *p; p++) continue; for (--p; p >= dname && !isdigit((unsigned char)*p); *p-- = '\0') continue; string = prop_string_create_cstring(dname); free(dname); prop_dictionary_set(args_dict, "device-name", string); prop_object_release(string); prop_dictionary_set(command_dict, "drvctl-arguments", args_dict); prop_object_release(args_dict); res = prop_dictionary_sendrecv_ioctl(command_dict, dfd, DRVCTLCOMMAND, &results_dict); (void)close(dfd); prop_object_release(command_dict); if (res) { warn("%s: prop_dictionary_sendrecv_ioctl", __func__); errno = res; return -1; } number = prop_dictionary_get(results_dict, "drvctl-error"); if ((errno = prop_number_integer_value(number)) != 0) return -1; data_dict = prop_dictionary_get(results_dict, "drvctl-result-data"); if (data_dict == NULL) goto out; disk_info = prop_dictionary_get(data_dict, "disk-info"); if (disk_info == NULL) goto out; geometry = prop_dictionary_get(disk_info, "geometry"); if (geometry == NULL) goto out; number = prop_dictionary_get(geometry, "sector-size"); if (number == NULL) goto out; *sector_size = prop_number_integer_value(number); number = prop_dictionary_get(geometry, "sectors-per-unit"); if (number == NULL) goto out; *media_size = prop_number_integer_value(number) * *sector_size; return 0; out: errno = EINVAL; return -1; } #endif static int gpt_gpt(int fd, off_t lba) { uuid_t type; off_t size; struct gpt_ent *ent; struct gpt_hdr *hdr; char *p, *s; map_t *m; size_t blocks, tblsz; unsigned int i; uint32_t crc; hdr = gpt_read(fd, lba, 1); if (hdr == NULL) return (-1); if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig))) goto fail_hdr; crc = le32toh(hdr->hdr_crc_self); hdr->hdr_crc_self = 0; if (crc32(hdr, le32toh(hdr->hdr_size)) != crc) { if (verbose) warnx("%s: Bad CRC in GPT header at sector %llu", device_name, (long long)lba); goto fail_hdr; } tblsz = le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz); blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0); /* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */ p = gpt_read(fd, le64toh(hdr->hdr_lba_table), blocks); if (p == NULL) return (-1); if (crc32(p, tblsz) != le32toh(hdr->hdr_crc_table)) { if (verbose) warnx("%s: Bad CRC in GPT table at sector %llu", device_name, (long long)le64toh(hdr->hdr_lba_table)); goto fail_ent; } if (verbose > 1) warnx("%s: %s GPT at sector %llu", device_name, (lba == 1) ? "Pri" : "Sec", (long long)lba); m = map_add(lba, 1, (lba == 1) ? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr); if (m == NULL) return (-1); m = map_add(le64toh(hdr->hdr_lba_table), blocks, (lba == 1) ? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p); if (m == NULL) return (-1); if (lba != 1) return (0); for (i = 0; i < le32toh(hdr->hdr_entries); i++) { ent = (void*)(p + i * le32toh(hdr->hdr_entsz)); if (uuid_is_nil((uuid_t *)&ent->ent_type, NULL)) continue; size = le64toh(ent->ent_lba_end) - le64toh(ent->ent_lba_start) + 1LL; if (verbose > 2) { le_uuid_dec(&ent->ent_type, &type); uuid_to_string(&type, &s, NULL); warnx( "%s: GPT partition: type=%s, start=%llu, size=%llu", device_name, s, (long long)le64toh(ent->ent_lba_start), (long long)size); free(s); } m = map_add(le64toh(ent->ent_lba_start), size, MAP_TYPE_GPT_PART, ent); if (m == NULL) return (-1); m->map_index = i + 1; } return (0); fail_ent: free(p); fail_hdr: free(hdr); return (0); } int gpt_open(const char *dev) { struct stat sb; int fd, mode; mode = readonly ? O_RDONLY : O_RDWR|O_EXCL; device_name = device_path; #ifdef __FreeBSD__ strlcpy(device_path, dev, sizeof(device_path)); if ((fd = open(device_path, mode)) != -1) goto found; snprintf(device_path, sizeof(device_path), "%s%s", _PATH_DEV, dev); device_name = device_path + strlen(_PATH_DEV); if ((fd = open(device_path, mode)) != -1) goto found; return (-1); found: #endif #ifdef __NetBSD__ fd = opendisk(dev, mode, device_path, sizeof(device_path), 0); if (fd == -1) return -1; device_name = device_path + strlen(_PATH_DEV); #endif if (fstat(fd, &sb) == -1) goto close; if ((sb.st_mode & S_IFMT) != S_IFREG) { #ifdef DIOCGSECTORSIZE if (ioctl(fd, DIOCGSECTORSIZE, &secsz) == -1 || ioctl(fd, DIOCGMEDIASIZE, &mediasz) == -1) goto close; #endif #ifdef __NetBSD__ if (drvctl(device_name, &secsz, &mediasz) == -1) goto close; #endif } else { secsz = 512; /* Fixed size for files. */ if (sb.st_size % secsz) { errno = EINVAL; goto close; } mediasz = sb.st_size; } /* * We require an absolute minimum of 6 sectors. One for the MBR, * 2 for the GPT header, 2 for the GPT table and one to hold some * user data. Let's catch this extreme border case here so that * we don't have to worry about it later. */ if (mediasz / secsz < 6) { errno = ENODEV; goto close; } if (verbose) warnx("%s: mediasize=%llu; sectorsize=%u; blocks=%llu", device_name, (long long)mediasz, secsz, (long long)(mediasz / secsz)); map_init(mediasz / secsz); if (gpt_mbr(fd, 0LL) == -1) goto close; if (gpt_gpt(fd, 1LL) == -1) goto close; if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1) goto close; return (fd); close: close(fd); return (-1); } void gpt_close(int fd) { /* XXX post processing? */ close(fd); } static struct { int (*fptr)(int, char *[]); const char *name; } cmdsw[] = { { cmd_add, "add" }, { cmd_create, "create" }, { cmd_destroy, "destroy" }, { NULL, "help" }, { cmd_label, "label" }, { cmd_migrate, "migrate" }, { cmd_recover, "recover" }, { cmd_remove, "remove" }, { NULL, "rename" }, { cmd_show, "show" }, { NULL, "verify" }, { NULL, NULL } }; static void usage(void) { extern const char addmsg[], createmsg[], destroymsg[]; extern const char labelmsg1[], labelmsg2[], labelmsg3[]; extern const char migratemsg[], recovermsg[], removemsg1[]; extern const char removemsg2[], showmsg[]; fprintf(stderr, "usage: %s %s\n" " %s %s\n" " %s %s\n" " %s %s\n" " %s %s\n" " %*s %s\n" " %s %s\n" " %s %s\n" " %s %s\n" " %s %s\n" " %s %s\n", getprogname(), addmsg, getprogname(), createmsg, getprogname(), destroymsg, getprogname(), labelmsg1, getprogname(), labelmsg2, (int)strlen(getprogname()), "", labelmsg3, getprogname(), migratemsg, getprogname(), recovermsg, getprogname(), removemsg1, getprogname(), removemsg2, getprogname(), showmsg); exit(1); } static void prefix(const char *cmd) { char *pfx; const char *prg; prg = getprogname(); pfx = malloc(strlen(prg) + strlen(cmd) + 2); /* Don't bother failing. It's not important */ if (pfx == NULL) return; sprintf(pfx, "%s %s", prg, cmd); setprogname(pfx); } int main(int argc, char *argv[]) { char *cmd, *p; int ch, i; /* Get the generic options */ while ((ch = getopt(argc, argv, "p:rv")) != -1) { switch(ch) { case 'p': if (parts > 0) usage(); parts = strtoul(optarg, &p, 10); if (*p != 0 || parts < 1) usage(); break; case 'r': readonly = 1; break; case 'v': verbose++; break; default: usage(); } } if (!parts) parts = 128; if (argc == optind) usage(); cmd = argv[optind++]; for (i = 0; cmdsw[i].name != NULL && strcmp(cmd, cmdsw[i].name); i++); if (cmdsw[i].fptr == NULL) errx(1, "unknown command: %s", cmd); prefix(cmd); return ((*cmdsw[i].fptr)(argc, argv)); }