| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include "sg_lib.h" |
| #include "sg_io_linux.h" |
| |
| /* This program performs a READ_16 command as scsi mid-level support |
| 16 byte commands from lk 2.4.15 |
| |
| * Copyright (C) 2001-2018 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_simple16 <scsi_device> |
| |
| Version 1.04 (20180218) |
| |
| */ |
| |
| #define READ16_REPLY_LEN 512 |
| #define READ16_CMD_LEN 16 |
| |
| #define EBUFF_SZ 256 |
| |
| int main(int argc, char * argv[]) |
| { |
| int sg_fd, k, ok; |
| uint8_t r16_cdb [READ16_CMD_LEN] = |
| {0x88, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0}; |
| sg_io_hdr_t io_hdr; |
| char * file_name = 0; |
| char ebuff[EBUFF_SZ]; |
| uint8_t inBuff[READ16_REPLY_LEN]; |
| uint8_t sense_buffer[32]; |
| |
| for (k = 1; k < argc; ++k) { |
| 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_simple16 <sg_device>'\n"); |
| return 1; |
| } |
| |
| if ((sg_fd = open(file_name, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sg_simple16: error opening file: %s", file_name); |
| perror(ebuff); |
| return 1; |
| } |
| /* Just to be safe, check we have a new sg device by trying an ioctl */ |
| if ((ioctl(sg_fd, SG_GET_VERSION_NUM, &k) < 0) || (k < 30000)) { |
| printf("sg_simple16: %s doesn't seem to be an new sg device\n", |
| file_name); |
| close(sg_fd); |
| return 1; |
| } |
| |
| /* Prepare READ_16 command */ |
| memset(&io_hdr, 0, sizeof(sg_io_hdr_t)); |
| io_hdr.interface_id = 'S'; |
| io_hdr.cmd_len = sizeof(r16_cdb); |
| /* io_hdr.iovec_count = 0; */ /* memset takes care of this */ |
| io_hdr.mx_sb_len = sizeof(sense_buffer); |
| io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| io_hdr.dxfer_len = READ16_REPLY_LEN; |
| io_hdr.dxferp = inBuff; |
| io_hdr.cmdp = r16_cdb; |
| io_hdr.sbp = sense_buffer; |
| io_hdr.timeout = 20000; /* 20000 millisecs == 20 seconds */ |
| /* io_hdr.flags = 0; */ /* take defaults: indirect IO, etc */ |
| /* io_hdr.pack_id = 0; */ |
| /* io_hdr.usr_ptr = NULL; */ |
| |
| if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) { |
| perror("sg_simple16: Inquiry SG_IO ioctl error"); |
| close(sg_fd); |
| return 1; |
| } |
| |
| /* now for the error processing */ |
| ok = 0; |
| switch (sg_err_category3(&io_hdr)) { |
| case SG_LIB_CAT_CLEAN: |
| ok = 1; |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| printf("Recovered error on READ_16, continuing\n"); |
| ok = 1; |
| break; |
| default: /* won't bother decoding other categories */ |
| sg_chk_n_print3("READ_16 command error", &io_hdr, 1); |
| break; |
| } |
| |
| if (ok) { /* output result if it is available */ |
| printf("READ_16 duration=%u millisecs, resid=%d, msg_status=%d\n", |
| io_hdr.duration, io_hdr.resid, (int)io_hdr.msg_status); |
| } |
| |
| close(sg_fd); |
| return 0; |
| } |