123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "sg_lib.h"
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#include "sg_io_linux.h"
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/* This program performs a READ_16 command as scsi mid-level support
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16 byte commands from lk 2.4.15
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* Copyright (C) 2001-2018 D. Gilbert
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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Invocation: sg_simple16 <scsi_device>
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Version 1.04 (20180218)
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*/
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#define READ16_REPLY_LEN 512
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#define READ16_CMD_LEN 16
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#define EBUFF_SZ 256
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int main(int argc, char * argv[])
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{
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int sg_fd, k, ok;
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uint8_t r16_cdb [READ16_CMD_LEN] =
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{0x88, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0};
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sg_io_hdr_t io_hdr;
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char * file_name = 0;
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char ebuff[EBUFF_SZ];
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uint8_t inBuff[READ16_REPLY_LEN];
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uint8_t sense_buffer[32];
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for (k = 1; k < argc; ++k) {
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if (*argv[k] == '-') {
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printf("Unrecognized switch: %s\n", argv[k]);
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file_name = 0;
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break;
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}
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else if (0 == file_name)
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file_name = argv[k];
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else {
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printf("too many arguments\n");
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file_name = 0;
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break;
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}
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}
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if (0 == file_name) {
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printf("Usage: 'sg_simple16 <sg_device>'\n");
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return 1;
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}
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if ((sg_fd = open(file_name, O_RDWR)) < 0) {
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snprintf(ebuff, EBUFF_SZ,
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"sg_simple16: error opening file: %s", file_name);
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perror(ebuff);
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return 1;
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}
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/* Just to be safe, check we have a new sg device by trying an ioctl */
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if ((ioctl(sg_fd, SG_GET_VERSION_NUM, &k) < 0) || (k < 30000)) {
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printf("sg_simple16: %s doesn't seem to be an new sg device\n",
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file_name);
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close(sg_fd);
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return 1;
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}
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/* Prepare READ_16 command */
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memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
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io_hdr.interface_id = 'S';
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io_hdr.cmd_len = sizeof(r16_cdb);
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/* io_hdr.iovec_count = 0; */ /* memset takes care of this */
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io_hdr.mx_sb_len = sizeof(sense_buffer);
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io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
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io_hdr.dxfer_len = READ16_REPLY_LEN;
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io_hdr.dxferp = inBuff;
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io_hdr.cmdp = r16_cdb;
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io_hdr.sbp = sense_buffer;
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io_hdr.timeout = 20000; /* 20000 millisecs == 20 seconds */
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/* io_hdr.flags = 0; */ /* take defaults: indirect IO, etc */
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/* io_hdr.pack_id = 0; */
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/* io_hdr.usr_ptr = NULL; */
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if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) {
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perror("sg_simple16: Inquiry SG_IO ioctl error");
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close(sg_fd);
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return 1;
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}
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/* now for the error processing */
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ok = 0;
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switch (sg_err_category3(&io_hdr)) {
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case SG_LIB_CAT_CLEAN:
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ok = 1;
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break;
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case SG_LIB_CAT_RECOVERED:
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printf("Recovered error on READ_16, continuing\n");
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ok = 1;
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break;
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default: /* won't bother decoding other categories */
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sg_chk_n_print3("READ_16 command error", &io_hdr, 1);
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break;
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}
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if (ok) { /* output result if it is available */
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printf("READ_16 duration=%u millisecs, resid=%d, msg_status=%d\n",
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io_hdr.duration, io_hdr.resid, (int)io_hdr.msg_status);
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}
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close(sg_fd);
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return 0;
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}
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