home *** CD-ROM | disk | FTP | other *** search
- #include <unistd.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdlib.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 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 1.02 (20020206)
-
- */
-
- #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;
- unsigned char r16CmdBlk [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];
- unsigned char inBuff[READ16_REPLY_LEN];
- unsigned char 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(r16CmdBlk);
- /* 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 = r16CmdBlk;
- 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;
- }
-