| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #define __STDC_FORMAT_MACROS 1 |
| #include <inttypes.h> |
| |
| #include "sg_lib.h" |
| #include "sg_cmds_basic.h" |
| |
| /* This code is does a SCSI READ CAPACITY command on the given device |
| and outputs the result. |
| |
| * Copyright (C) 1999 - 2007 D. Gilbert |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| |
| This program was originally written with Linux 2.4 kernel series. |
| It should now also build for the Linux 2.6 kernel series and various |
| other operating systems. |
| |
| */ |
| |
| static char * version_str = "3.81 20070419"; |
| |
| #define ME "sg_readcap: " |
| |
| #define RCAP_REPLY_LEN 8 |
| #define RCAP16_REPLY_LEN 32 |
| |
| static struct option long_options[] = { |
| {"brief", 0, 0, 'b'}, |
| {"help", 0, 0, 'h'}, |
| {"hex", 0, 0, 'H'}, |
| {"lba", 1, 0, 'L'}, |
| {"long", 0, 0, 'l'}, |
| {"new", 0, 0, 'N'}, |
| {"old", 0, 0, 'O'}, |
| {"pmi", 0, 0, 'p'}, |
| {"raw", 0, 0, 'r'}, |
| {"verbose", 0, 0, 'v'}, |
| {"version", 0, 0, 'V'}, |
| {0, 0, 0, 0}, |
| }; |
| |
| struct opts_t { |
| int do_brief; |
| int do_help; |
| int do_hex; |
| int do_lba; |
| int do_long; |
| int do_pmi; |
| int do_raw; |
| int do_verbose; |
| int do_version; |
| unsigned long long llba; |
| const char * device_name; |
| int opt_new; |
| }; |
| |
| static void usage() |
| { |
| fprintf(stderr, "Usage: sg_readcap [--brief] [--help] [--hex] " |
| "[--lba=LBA] [--long] [--pmi]\n" |
| " [--raw] [--verbose] [--version] " |
| "DEVICE\n" |
| " where:\n" |
| " --brief|-b brief, two hex numbers: number of blocks " |
| "and block size\n" |
| " --help|-h print this usage message and exit\n" |
| " --hex|-H output response in hexadecimal to stdout\n" |
| " --lba=LBA|-L LBA yields the last block prior to (head " |
| "movement) delay\n" |
| " after LBA [in decimal (def: 0) " |
| "valid with '--pmi']\n" |
| " --long|-l use READ CAPACITY (16) cdb (def: use " |
| "10 byte cdb)\n" |
| " --pmi|-p partial medium indicator (without this " |
| "option shows\n" |
| " total disk capacity)\n" |
| " --raw|-r output response in binary to stdout\n" |
| " --verbose|-v increase verbosity\n" |
| " --version|-V print version string and exit\n\n" |
| "Perform a SCSI READ CAPACITY (10 or 16) command\n"); |
| } |
| |
| static void usage_old() |
| { |
| fprintf(stderr, "Usage: sg_readcap [-16] [-b] [-h] [-H] [-lba=LBA] " |
| "[-pmi] [-r] [-v] [-V]\n" |
| " DEVICE\n" |
| " where:\n" |
| " -16 use READ CAPACITY (16) cdb (def: use " |
| "10 byte cdb)\n" |
| " -b brief, two hex numbers: number of blocks " |
| "and block size\n" |
| " -h print this usage message and exit\n" |
| " -H output response in hexadecimal to stdout\n" |
| " -lba=LBA yields the last block prior to (head " |
| "movement) delay\n" |
| " after LBA [in hex (def: 0) " |
| "valid with -pmi]\n" |
| " -pmi partial medium indicator (without this option " |
| "shows total\n" |
| " disk capacity)\n" |
| " -r output response in binary to stdout\n" |
| " -v increase verbosity\n" |
| " -V print version string and exit\n\n" |
| "Perform a SCSI READ CAPACITY command\n"); |
| } |
| |
| static void usage_for(const struct opts_t * optsp) |
| { |
| if (optsp->opt_new) |
| usage(); |
| else |
| usage_old(); |
| } |
| |
| static int process_cl_new(struct opts_t * optsp, int argc, char * argv[]) |
| { |
| int c; |
| int a_one = 0; |
| long long nn; |
| |
| while (1) { |
| int option_index = 0; |
| |
| c = getopt_long(argc, argv, "16bhHlL:NOprvV", long_options, |
| &option_index); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case '1': |
| ++a_one; |
| break; |
| case '6': |
| if (a_one) |
| ++optsp->do_long; |
| break; |
| case 'b': |
| ++optsp->do_brief; |
| break; |
| case 'h': |
| case '?': |
| ++optsp->do_help; |
| break; |
| case 'H': |
| ++optsp->do_hex; |
| break; |
| case 'l': |
| ++optsp->do_long; |
| break; |
| case 'L': |
| nn = sg_get_llnum(optarg); |
| if (-1 == nn) { |
| fprintf(stderr, "bad argument to '--lba='\n"); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| optsp->llba = nn; |
| /* force READ_CAPACITY16 for large lbas */ |
| if (optsp->llba > 0xfffffffeULL) |
| ++optsp->do_long; |
| ++optsp->do_lba; |
| break; |
| case 'N': |
| break; /* ignore */ |
| case 'O': |
| optsp->opt_new = 0; |
| return 0; |
| case 'p': |
| ++optsp->do_pmi; |
| break; |
| case 'r': |
| ++optsp->do_raw; |
| break; |
| case 'v': |
| ++optsp->do_verbose; |
| break; |
| case 'V': |
| ++optsp->do_version; |
| break; |
| default: |
| fprintf(stderr, "unrecognised option code %c [0x%x]\n", c, c); |
| if (optsp->do_help) |
| break; |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } |
| if (optind < argc) { |
| if (NULL == optsp->device_name) { |
| optsp->device_name = argv[optind]; |
| ++optind; |
| } |
| if (optind < argc) { |
| for (; optind < argc; ++optind) |
| fprintf(stderr, "Unexpected extra argument: %s\n", |
| argv[optind]); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } |
| return 0; |
| } |
| |
| static int process_cl_old(struct opts_t * optsp, int argc, char * argv[]) |
| { |
| int k, jmp_out, plen, num; |
| const char * cp; |
| unsigned long long uu; |
| |
| for (k = 1; k < argc; ++k) { |
| cp = argv[k]; |
| plen = strlen(cp); |
| if (plen <= 0) |
| continue; |
| if ('-' == *cp) { |
| for (--plen, ++cp, jmp_out = 0; plen > 0; --plen, ++cp) { |
| switch (*cp) { |
| case '1': |
| if ('6' == *(cp + 1)) { |
| ++optsp->do_long; |
| ++cp; |
| --plen; |
| } else |
| jmp_out = 1; |
| break; |
| case 'b': |
| ++optsp->do_brief; |
| break; |
| case 'h': |
| case '?': |
| ++optsp->do_help; |
| break; |
| case 'H': |
| ++optsp->do_hex; |
| break; |
| case 'N': |
| optsp->opt_new = 1; |
| return 0; |
| case 'O': |
| break; |
| case 'p': |
| if (0 == strncmp("pmi", cp, 3)) { |
| ++optsp->do_pmi; |
| cp += 2; |
| plen -= 2; |
| } else |
| jmp_out = 1; |
| break; |
| case 'r': |
| ++optsp->do_raw; |
| break; |
| case 'v': |
| ++optsp->do_verbose; |
| break; |
| case 'V': |
| ++optsp->do_version; |
| break; |
| default: |
| jmp_out = 1; |
| break; |
| } |
| if (jmp_out) |
| break; |
| } |
| if (plen <= 0) |
| continue; |
| if (0 == strncmp("lba=", cp, 4)) { |
| num = sscanf(cp + 4, "%" SCNx64 "", &uu); |
| if (1 != num) { |
| printf("Bad value after 'lba=' option\n"); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| /* force READ_CAPACITY16 for large lbas */ |
| if (uu > 0xfffffffeULL) |
| ++optsp->do_long; |
| optsp->llba = uu; |
| ++optsp->do_lba; |
| } else if (0 == strncmp("-old", cp, 4)) |
| ; |
| else if (jmp_out) { |
| fprintf(stderr, "Unrecognized option: %s\n", cp); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == optsp->device_name) |
| optsp->device_name = cp; |
| else { |
| fprintf(stderr, "too many arguments, got: %s, not expecting: " |
| "%s\n", optsp->device_name, cp); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } |
| return 0; |
| } |
| |
| static int process_cl(struct opts_t * optsp, int argc, char * argv[]) |
| { |
| int res; |
| char * cp; |
| |
| cp = getenv("SG3_UTILS_OLD_OPTS"); |
| if (cp) { |
| optsp->opt_new = 0; |
| res = process_cl_old(optsp, argc, argv); |
| if ((0 == res) && optsp->opt_new) |
| res = process_cl_new(optsp, argc, argv); |
| } else { |
| optsp->opt_new = 1; |
| res = process_cl_new(optsp, argc, argv); |
| if ((0 == res) && (0 == optsp->opt_new)) |
| res = process_cl_old(optsp, argc, argv); |
| } |
| return res; |
| } |
| |
| static void dStrRaw(const char* str, int len) |
| { |
| int k; |
| |
| for (k = 0 ; k < len; ++k) |
| printf("%c", str[k]); |
| } |
| |
| int main(int argc, char * argv[]) |
| { |
| int sg_fd, k, res; |
| unsigned long long llast_blk_addr; |
| int ret = 0; |
| unsigned int last_blk_addr, block_size; |
| unsigned char resp_buff[RCAP16_REPLY_LEN]; |
| struct opts_t opts; |
| |
| memset(&opts, 0, sizeof(opts)); |
| res = process_cl(&opts, argc, argv); |
| if (res) |
| return SG_LIB_SYNTAX_ERROR; |
| if (opts.do_help) { |
| usage_for(&opts); |
| return 0; |
| } |
| if (opts.do_version) { |
| fprintf(stderr, "Version string: %s\n", version_str); |
| return 0; |
| } |
| |
| if (NULL == opts.device_name) { |
| fprintf(stderr, "No DEVICE argument given\n"); |
| usage_for(&opts); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| |
| memset(resp_buff, 0, sizeof(resp_buff)); |
| |
| if ((0 == opts.do_pmi) && (opts.llba > 0)) { |
| fprintf(stderr, ME "lba can only be non-zero when '--pmi' is set\n"); |
| usage_for(&opts); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| if ((sg_fd = sg_cmds_open_device(opts.device_name, |
| (opts.do_long ? 0 /* rw */ : 1), opts.do_verbose)) < 0) { |
| fprintf(stderr, ME "error opening file: %s: %s\n", opts.device_name, |
| safe_strerror(-sg_fd)); |
| return SG_LIB_FILE_ERROR; |
| } |
| |
| if (! opts.do_long) { |
| res = sg_ll_readcap_10(sg_fd, opts.do_pmi, (unsigned int)opts.llba, |
| resp_buff, RCAP_REPLY_LEN, 0, opts.do_verbose); |
| ret = res; |
| if (0 == res) { |
| if (opts.do_hex || opts.do_raw) { |
| if (opts.do_raw) |
| dStrRaw((const char *)resp_buff, RCAP_REPLY_LEN); |
| else |
| dStrHex((const char *)resp_buff, RCAP_REPLY_LEN, 1); |
| goto good; |
| } |
| last_blk_addr = ((resp_buff[0] << 24) | (resp_buff[1] << 16) | |
| (resp_buff[2] << 8) | resp_buff[3]); |
| if (0xffffffff != last_blk_addr) { |
| block_size = ((resp_buff[4] << 24) | (resp_buff[5] << 16) | |
| (resp_buff[6] << 8) | resp_buff[7]); |
| if (opts.do_brief) { |
| printf("0x%x 0x%x\n", last_blk_addr + 1, block_size); |
| goto good; |
| } |
| printf("Read Capacity results:\n"); |
| if (opts.do_pmi) |
| printf(" PMI mode: given lba=0x%" PRIx64 ", last lba " |
| "before delay=0x%x\n", opts.llba, last_blk_addr); |
| else |
| printf(" Last logical block address=%u (0x%x), Number " |
| "of blocks=%u\n", last_blk_addr, last_blk_addr, |
| last_blk_addr + 1); |
| printf(" Logical block length=%u bytes\n", block_size); |
| if (! opts.do_pmi) { |
| unsigned long long total_sz = last_blk_addr + 1; |
| double sz_mb, sz_gb; |
| |
| total_sz *= block_size; |
| sz_mb = ((double)(last_blk_addr + 1) * block_size) / |
| (double)(1048576); |
| sz_gb = ((double)(last_blk_addr + 1) * block_size) / |
| (double)(1000000000L); |
| printf("Hence:\n"); |
| #ifdef SG3_UTILS_MINGW |
| printf(" Device size: %" PRIu64 " bytes, %g MiB, %g " |
| "GB\n", total_sz, sz_mb, sz_gb); |
| #else |
| printf(" Device size: %" PRIu64 " bytes, %.1f MiB, " |
| "%.2f GB\n", total_sz, sz_mb, sz_gb); |
| #endif |
| } |
| goto good; |
| } else { |
| printf("READ CAPACITY (10) indicates device capacity too " |
| "large\n now trying 16 byte cdb variant\n"); |
| opts.do_long = 1; |
| } |
| } else if (SG_LIB_CAT_INVALID_OP == res) { |
| opts.do_long = 1; |
| sg_cmds_close_device(sg_fd); |
| if ((sg_fd = sg_cmds_open_device(opts.device_name, 0 /*rw */, |
| opts.do_verbose)) |
| < 0) { |
| fprintf(stderr, ME "error re-opening file: %s (rw): %s\n", |
| opts.device_name, safe_strerror(-sg_fd)); |
| return SG_LIB_FILE_ERROR; |
| } |
| if (opts.do_verbose) |
| fprintf(stderr, "READ CAPACITY (10) not supported, trying " |
| "READ CAPACITY (16)\n"); |
| } else if (SG_LIB_CAT_ILLEGAL_REQ == res) |
| fprintf(stderr, "bad field in READ CAPACITY (10) cdb\n"); |
| else if (SG_LIB_CAT_NOT_READY == res) |
| fprintf(stderr, "READ CAPACITY (10) failed, device not ready\n"); |
| else if (SG_LIB_CAT_ABORTED_COMMAND == res) |
| fprintf(stderr, "READ CAPACITY (10) failed, aborted command\n"); |
| else if (! opts.do_verbose) |
| fprintf(stderr, "READ CAPACITY (10) failed [res=%d], try " |
| "with '-v'\n", res); |
| } |
| if (opts.do_long) { |
| res = sg_ll_readcap_16(sg_fd, opts.do_pmi, opts.llba, resp_buff, |
| RCAP16_REPLY_LEN, 0, opts.do_verbose); |
| ret = res; |
| if (0 == res) { |
| if (opts.do_hex || opts.do_raw) { |
| if (opts.do_raw) |
| dStrRaw((const char *)resp_buff, RCAP16_REPLY_LEN); |
| else |
| dStrHex((const char *)resp_buff, RCAP16_REPLY_LEN, 1); |
| goto good; |
| } |
| for (k = 0, llast_blk_addr = 0; k < 8; ++k) { |
| llast_blk_addr <<= 8; |
| llast_blk_addr |= resp_buff[k]; |
| } |
| block_size = ((resp_buff[8] << 24) | (resp_buff[9] << 16) | |
| (resp_buff[10] << 8) | resp_buff[11]); |
| if (opts.do_brief) { |
| printf("0x%" PRIx64 " 0x%x\n", llast_blk_addr + 1, block_size); |
| goto good; |
| } |
| printf("Read Capacity results:\n"); |
| printf(" Protection: prot_en=%d, p_type=%d\n", |
| !!(resp_buff[12] & 0x1), ((resp_buff[12] >> 1) & 0x7)); |
| if (opts.do_pmi) |
| printf(" PMI mode: given lba=0x%" PRIx64 ", last lba " |
| "before delay=0x%" PRIx64 "\n", opts.llba, |
| llast_blk_addr); |
| else |
| printf(" Last logical block address=%" PRIu64 " (0x%" |
| PRIx64 "), Number of logical blocks=%" PRIu64 "\n", |
| llast_blk_addr, llast_blk_addr, llast_blk_addr + 1); |
| printf(" Logical block length=%u bytes\n", block_size); |
| printf(" Logical blocks per physical block=%d (log base 2) " |
| "[actual=%d]\n", (resp_buff[13] & 0xf), |
| (1 << (resp_buff[13] & 0xf))); |
| printf(" Lowest aligned logical block address=%d\n", |
| ((resp_buff[14] & 0x3f) << 8) + resp_buff[15]); |
| if (! opts.do_pmi) { |
| unsigned long long total_sz = llast_blk_addr + 1; |
| double sz_mb, sz_gb; |
| |
| total_sz *= block_size; |
| sz_mb = ((double)(llast_blk_addr + 1) * block_size) / |
| (double)(1048576); |
| sz_gb = ((double)(llast_blk_addr + 1) * block_size) / |
| (double)(1000000000L); |
| printf("Hence:\n"); |
| #ifdef SG3_UTILS_MINGW |
| printf(" Device size: %" PRIu64 " bytes, %g MiB, %g GB\n", |
| total_sz, sz_mb, sz_gb); |
| #else |
| printf(" Device size: %" PRIu64 " bytes, %.1f MiB, %.2f " |
| "GB\n", total_sz, sz_mb, sz_gb); |
| #endif |
| } |
| goto good; |
| } |
| else if (SG_LIB_CAT_INVALID_OP == res) |
| fprintf(stderr, "READ CAPACITY (16) not supported\n"); |
| else if (SG_LIB_CAT_NOT_READY == res) |
| fprintf(stderr, "READ CAPACITY (16) failed, device not ready\n"); |
| else if (SG_LIB_CAT_ABORTED_COMMAND == res) |
| fprintf(stderr, "READ CAPACITY (16) failed, aborted command\n"); |
| else if (SG_LIB_CAT_ILLEGAL_REQ == res) |
| fprintf(stderr, "bad field in READ CAPACITY (16) cdb " |
| "including unsupported service action\n"); |
| else if (! opts.do_verbose) |
| fprintf(stderr, "READ CAPACITY (16) failed [res=%d], try " |
| "with '-v'\n", res); |
| } |
| if (opts.do_brief) |
| printf("0x0 0x0\n"); |
| |
| good: |
| res = sg_cmds_close_device(sg_fd); |
| if (res < 0) { |
| fprintf(stderr, "close error: %s\n", safe_strerror(-res)); |
| if (0 == ret) |
| return SG_LIB_FILE_ERROR; |
| } |
| return (ret >= 0) ? ret : SG_LIB_CAT_OTHER; |
| } |
