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sg_simple5.c
#include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "sg_lib.h" #include "sg_pt.h" /* This is a simple program executing a SCSI INQUIRY command and a TEST UNIT READY command using the SCSI generic pass through interface. This allows this example program to be ported to OSes other than linux. * Copyright (C) 2006-20018 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. Invocation: sg_simple5 [-x] <scsi_device> Version 1.03 (20180220) */ #define INQ_REPLY_LEN 96 #define INQ_CMD_LEN 6 #define TUR_CMD_LEN 6 #define CMD_TIMEOUT_SECS 60 int main(int argc, char * argv[]) { int sg_fd, k, ok, dsize, res, duration, resid, cat, got, slen; uint8_t inq_cdb [INQ_CMD_LEN] = {0x12, 0, 0, 0, INQ_REPLY_LEN, 0}; uint8_t tur_cdb [TUR_CMD_LEN] = {0x00, 0, 0, 0, 0, 0}; uint8_t inqBuff[INQ_REPLY_LEN]; char * file_name = 0; char b[512]; uint8_t sense_b[32]; int verbose = 0; struct sg_pt_base * ptvp; for (k = 1; k < argc; ++k) { if (0 == strcmp("-v", argv[k])) verbose = 1; else if (0 == strcmp("-vv", argv[k])) verbose = 2; else if (0 == strcmp("-vvv", argv[k])) verbose = 3; else if (*argv[k] == '-') { printf("Unrecognized switch: %s\n", argv[k]); file_name = 0; break; } else if (0 == file_name) file_name = argv[k]; else { printf("too many arguments\n"); file_name = 0; break; } } if (0 == file_name) { printf("Usage: 'sg_simple5 [-v|-vv|-vvv] <device>'\n"); return 1; } sg_fd = scsi_pt_open_device(file_name, 1 /* ro */, 0); /* N.B. An access mode of O_RDWR is required for some SCSI commands */ if (sg_fd < 0) { fprintf(stderr, "error opening file: %s: %s\n", file_name, safe_strerror(-sg_fd)); return 1; } dsize = sizeof(inqBuff); ok = 0; ptvp = construct_scsi_pt_obj(); /* one object per command */ if (NULL == ptvp) { fprintf(stderr, "sg_simple5: out of memory\n"); return -1; } set_scsi_pt_cdb(ptvp, inq_cdb, sizeof(inq_cdb)); set_scsi_pt_sense(ptvp, sense_b, sizeof(sense_b)); set_scsi_pt_data_in(ptvp, inqBuff, dsize); res = do_scsi_pt(ptvp, sg_fd, CMD_TIMEOUT_SECS, verbose); if (res < 0) { fprintf(stderr, " pass through os error: %s\n", safe_strerror(-res)); goto finish_inq; } else if (SCSI_PT_DO_BAD_PARAMS == res) { fprintf(stderr, " bad pass through setup\n"); goto finish_inq; } else if (SCSI_PT_DO_TIMEOUT == res) { fprintf(stderr, " pass through timeout\n"); goto finish_inq; } if ((verbose > 1) && ((duration = get_scsi_pt_duration_ms(ptvp)) >= 0)) fprintf(stderr, " duration=%d ms\n", duration); resid = get_scsi_pt_resid(ptvp); switch ((cat = get_scsi_pt_result_category(ptvp))) { case SCSI_PT_RESULT_GOOD: got = dsize - resid; if (verbose && (resid > 0)) fprintf(stderr, " requested %d bytes but " "got %d bytes)\n", dsize, got); break; case SCSI_PT_RESULT_STATUS: /* other than GOOD and CHECK CONDITION */ if (verbose) { sg_get_scsi_status_str(get_scsi_pt_status_response(ptvp), sizeof(b), b); fprintf(stderr, " scsi status: %s\n", b); } goto finish_inq; case SCSI_PT_RESULT_SENSE: slen = get_scsi_pt_sense_len(ptvp); if (verbose) { sg_get_sense_str("", sense_b, slen, (verbose > 1), sizeof(b), b); fprintf(stderr, "%s", b); } if (verbose && (resid > 0)) { got = dsize - resid; if ((verbose) || (got > 0)) fprintf(stderr, " requested %d bytes but " "got %d bytes\n", dsize, got); } goto finish_inq; case SCSI_PT_RESULT_TRANSPORT_ERR: if (verbose) { get_scsi_pt_transport_err_str(ptvp, sizeof(b), b); fprintf(stderr, " transport: %s", b); } goto finish_inq; case SCSI_PT_RESULT_OS_ERR: if (verbose) { get_scsi_pt_os_err_str(ptvp, sizeof(b), b); fprintf(stderr, " os: %s", b); } goto finish_inq; default: fprintf(stderr, " unknown pass through result " "category (%d)\n", cat); goto finish_inq; } ok = 1; finish_inq: destruct_scsi_pt_obj(ptvp); if (ok) { /* output result if it is available */ char * p = (char *)inqBuff; printf("Some of the INQUIRY command's results:\n"); printf(" %.8s %.16s %.4s\n", p + 8, p + 16, p + 32); } ok = 0; /* Now prepare TEST UNIT READY command */ ptvp = construct_scsi_pt_obj(); /* one object per command */ if (NULL == ptvp) { fprintf(stderr, "sg_simple5: out of memory\n"); return -1; } set_scsi_pt_cdb(ptvp, tur_cdb, sizeof(tur_cdb)); set_scsi_pt_sense(ptvp, sense_b, sizeof(sense_b)); /* no data in or out */ res = do_scsi_pt(ptvp, sg_fd, CMD_TIMEOUT_SECS, verbose); if (res < 0) { fprintf(stderr, " pass through os error: %s\n", safe_strerror(-res)); goto finish_inq; } else if (SCSI_PT_DO_BAD_PARAMS == res) { fprintf(stderr, " bad pass through setup\n"); goto finish_inq; } else if (SCSI_PT_DO_TIMEOUT == res) { fprintf(stderr, " pass through timeout\n"); goto finish_inq; } if ((verbose > 1) && ((duration = get_scsi_pt_duration_ms(ptvp)) >= 0)) fprintf(stderr, " duration=%d ms\n", duration); resid = get_scsi_pt_resid(ptvp); switch ((cat = get_scsi_pt_result_category(ptvp))) { case SCSI_PT_RESULT_GOOD: break; case SCSI_PT_RESULT_STATUS: /* other than GOOD and CHECK CONDITION */ if (verbose) { sg_get_scsi_status_str(get_scsi_pt_status_response(ptvp), sizeof(b), b); fprintf(stderr, " scsi status: %s\n", b); } goto finish_tur; case SCSI_PT_RESULT_SENSE: slen = get_scsi_pt_sense_len(ptvp); if (verbose) { sg_get_sense_str("", sense_b, slen, (verbose > 1), sizeof(b), b); fprintf(stderr, "%s", b); } goto finish_tur; case SCSI_PT_RESULT_TRANSPORT_ERR: if (verbose) { get_scsi_pt_transport_err_str(ptvp, sizeof(b), b); fprintf(stderr, " transport: %s", b); } goto finish_tur; case SCSI_PT_RESULT_OS_ERR: if (verbose) { get_scsi_pt_os_err_str(ptvp, sizeof(b), b); fprintf(stderr, " os: %s", b); } goto finish_tur; default: fprintf(stderr, " unknown pass through result " "category (%d)\n", cat); goto finish_tur; } ok = 1; finish_tur: destruct_scsi_pt_obj(ptvp); if (ok) printf("Test Unit Ready successful so unit is ready!\n"); else printf("Test Unit Ready failed so unit may _not_ be ready!\n"); scsi_pt_close_device(sg_fd); return 0; }
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