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Diffstat (limited to 'src/sg_rmsn.c')
| -rw-r--r-- | src/sg_rmsn.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/src/sg_rmsn.c b/src/sg_rmsn.c new file mode 100644 index 00000000..c413ea43 --- /dev/null +++ b/src/sg_rmsn.c @@ -0,0 +1,231 @@ +/* + * Copyright (c) 2005-2018 Douglas Gilbert. + * All rights reserved. + * Use of this source code is governed by a BSD-style + * license that can be found in the BSD_LICENSE file. + * + * SPDX-License-Identifier: BSD-2-Clause + */ + +#include <unistd.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <stdbool.h> +#include <string.h> +#include <getopt.h> + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "sg_lib.h" +#include "sg_cmds_basic.h" +#include "sg_cmds_extra.h" +#include "sg_unaligned.h" +#include "sg_pr2serr.h" + +/* A utility program was originally written for the Linux OS SCSI subsystem. + * + * + * This program issues the SCSI command READ MEDIA SERIAL NUMBER + * to the given SCSI device. + */ + +static const char * version_str = "1.18 20180628"; + +#define SERIAL_NUM_SANITY_LEN (16 * 1024) + + +static struct option long_options[] = { + {"help", no_argument, 0, 'h'}, + {"raw", no_argument, 0, 'r'}, + {"readonly", no_argument, 0, 'R'}, + {"verbose", no_argument, 0, 'v'}, + {"version", no_argument, 0, 'V'}, + {0, 0, 0, 0}, +}; + +static void usage() +{ + pr2serr("Usage: sg_rmsn [--help] [--raw] [--readonly] [--verbose] " + "[--version]\n" + " DEVICE\n" + " where:\n" + " --help|-h print out usage message\n" + " --raw|-r output serial number to stdout " + "(potentially binary)\n" + " --readonly|-R open DEVICE read-only (def: open it " + "read-write)\n" + " --verbose|-v increase verbosity\n" + " --version|-V print version string and exit\n\n" + "Performs a SCSI READ MEDIA SERIAL NUMBER command\n"); +} + +int main(int argc, char * argv[]) +{ + bool raw = false; + bool readonly = false; + bool verbose_given = false; + bool version_given = false; + int res, c, sn_len, n; + int sg_fd = -1; + int ret = 0; + int verbose = 0; + uint8_t rmsn_buff[4]; + uint8_t * bp = NULL; + const char * device_name = NULL; + + while (1) { + int option_index = 0; + + c = getopt_long(argc, argv, "hrRvV", long_options, + &option_index); + if (c == -1) + break; + + switch (c) { + case 'h': + case '?': + usage(); + return 0; + case 'r': + raw = true; + break; + case 'R': + readonly = true; + break; + case 'v': + verbose_given = true; + ++verbose; + break; + case 'V': + version_given = true; + break; + default: + pr2serr("unrecognised option code 0x%x ??\n", c); + usage(); + return SG_LIB_SYNTAX_ERROR; + } + } + if (optind < argc) { + if (NULL == device_name) { + device_name = argv[optind]; + ++optind; + } + if (optind < argc) { + for (; optind < argc; ++optind) + pr2serr("Unexpected extra argument: %s\n", argv[optind]); + usage(); + return SG_LIB_SYNTAX_ERROR; + } + } +#ifdef DEBUG + pr2serr("In DEBUG mode, "); + if (verbose_given && version_given) { + pr2serr("but override: '-vV' given, zero verbose and continue\n"); + verbose_given = false; + version_given = false; + verbose = 0; + } else if (! verbose_given) { + pr2serr("set '-vv'\n"); + verbose = 2; + } else + pr2serr("keep verbose=%d\n", verbose); +#else + if (verbose_given && version_given) + pr2serr("Not in DEBUG mode, so '-vV' has no special action\n"); +#endif + if (version_given) { + pr2serr("version: %s\n", version_str); + return 0; + } + + if (NULL == device_name) { + pr2serr("missing device name!\n"); + usage(); + return SG_LIB_SYNTAX_ERROR; + } + if (raw) { + if (sg_set_binary_mode(STDOUT_FILENO) < 0) { + perror("sg_set_binary_mode"); + return SG_LIB_FILE_ERROR; + } + } + + sg_fd = sg_cmds_open_device(device_name, readonly, verbose); + if (sg_fd < 0) { + if (verbose) + pr2serr("open error: %s: %s\n", device_name, + safe_strerror(-sg_fd)); + ret = sg_convert_errno(-sg_fd); + goto err_out; + } + + memset(rmsn_buff, 0x0, sizeof(rmsn_buff)); + + res = sg_ll_read_media_serial_num(sg_fd, rmsn_buff, sizeof(rmsn_buff), + true, verbose); + ret = res; + if (0 == res) { + sn_len = sg_get_unaligned_be32(rmsn_buff + 0); + if (! raw) + printf("Reported serial number length = %d\n", sn_len); + if (0 == sn_len) { + pr2serr(" This implies the media has no serial number\n"); + goto err_out; + } + if (sn_len > SERIAL_NUM_SANITY_LEN) { + pr2serr(" That length (%d) seems too long for a serial " + "number\n", sn_len); + goto err_out; + } + sn_len += 4; + bp = (uint8_t *)malloc(sn_len); + if (NULL == bp) { + pr2serr(" Out of memory (ram)\n"); + goto err_out; + } + res = sg_ll_read_media_serial_num(sg_fd, bp, sn_len, true, verbose); + if (0 == res) { + sn_len = sg_get_unaligned_be32(bp + 0); + if (raw) { + if (sn_len > 0) { + n = fwrite(bp + 4, 1, sn_len, stdout); + if (n) { ; } /* unused, dummy to suppress warning */ + } + } else { + printf("Serial number:\n"); + if (sn_len > 0) + hex2stdout(bp + 4, sn_len, 0); + } + } + } + if (res) { + char b[80]; + + sg_get_category_sense_str(res, sizeof(b), b, verbose); + pr2serr("Read Media Serial Number: %s\n", b); + if (0 == verbose) + pr2serr(" try '-v' for more information\n"); + } + +err_out: + if (bp) + free(bp); + if (sg_fd >= 0) { + res = sg_cmds_close_device(sg_fd); + if (res < 0) { + pr2serr("close error: %s\n", safe_strerror(-res)); + if (0 == ret) + ret = sg_convert_errno(-res); + } + } + if (0 == verbose) { + if (! sg_if_can2stderr("sg_rmsn failed: ", ret)) + pr2serr("Some error occurred, try again with '-v' " + "or '-vv' for more information\n"); + } + return (ret >= 0) ? ret : SG_LIB_CAT_OTHER; +} |