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- #include <unistd.h>
- #include <signal.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 <scsi/scsi.h>
- /* #include <scsi/scsi_ioctl.h> */ /* glibc hides this file sometimes */
-
- /* Test code for D. Gilbert's extensions to the Linux OS SCSI generic ("sg")
- device driver.
- * Copyright (C) 1999 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.
-
- This program does a SCSI inquiry command on the given device and
- outputs some of the result. This program highlights the use of the
- SCSI_IOCTL_SEND_COMMAND ioctl. This should be able to be applied to
- any SCSI device file descriptor (not just one related to sg). [Whether
- this is a good idea on a disk while it is mounted is debatable.
- No detrimental effects when this was tested ...]
-
- Version 0.14 20011218
- */
-
-
- typedef struct my_scsi_ioctl_command {
- unsigned int inlen; /* _excluding_ scsi command length */
- unsigned int outlen;
- unsigned char data[1]; /* was 0 but that's not ISO C!! */
- /* on input, scsi command starts here then opt. data */
- } My_Scsi_Ioctl_Command;
-
- #define OFF (2 * sizeof(unsigned int))
-
- #ifndef SCSI_IOCTL_SEND_COMMAND
- #define SCSI_IOCTL_SEND_COMMAND 1
- #endif
-
- #define INQUIRY_CMD 0x12
- #define INQUIRY_CMDLEN 6
- #define INQUIRY_REPLY_LEN 96
-
-
- int main(int argc, char * argv[])
- {
- int s_fd, res, k, to;
- unsigned char inqCmdBlk [INQUIRY_CMDLEN] = {INQUIRY_CMD, 0, 0, 0,
- INQUIRY_REPLY_LEN, 0};
- unsigned char * inqBuff = (unsigned char *)
- malloc(OFF + sizeof(inqCmdBlk) + 512);
- unsigned char * buffp = inqBuff + OFF;
- My_Scsi_Ioctl_Command * ishp = (My_Scsi_Ioctl_Command *)inqBuff;
- char * file_name = 0;
- int do_nonblock = 0;
- int oflags = 0;
-
- for (k = 1; k < argc; ++k) {
- if (0 == strcmp(argv[k], "-n"))
- do_nonblock = 1;
- else if (*argv[k] != '-')
- file_name = argv[k];
- else {
- printf("Unrecognized argument '%s'\n", argv[k]);
- file_name = 0;
- break;
- }
- }
- if (0 == file_name) {
- printf("Usage: 'scsi_inquiry [-n] <scsi_device>'\n");
- printf(" where: -n open device in non-blocking mode\n");
- printf(" Examples: scsi_inquiry /dev/sda\n");
- printf(" scsi_inquiry /dev/sg0\n");
- printf(" scsi_inquiry -n /dev/scd0\n");
- return 1;
- }
-
- if (do_nonblock)
- oflags = O_NONBLOCK;
- s_fd = open(file_name, oflags | O_RDWR);
- if (s_fd < 0) {
- if ((EROFS == errno) || (EACCES == errno)) {
- s_fd = open(file_name, oflags | O_RDONLY);
- if (s_fd < 0) {
- perror("scsi_inquiry: open error");
- return 1;
- }
- }
- else {
- perror("scsi_inquiry: open error");
- return 1;
- }
- }
- /* Don't worry, being very careful not to write to a none-scsi file ... */
- res = ioctl(s_fd, SCSI_IOCTL_GET_BUS_NUMBER, &to);
- if (res < 0) {
- /* perror("ioctl on scsi device, error"); */
- printf("scsi_inquiry: not a scsi device\n");
- return 1;
- }
-
- ishp->inlen = 0;
- ishp->outlen = INQUIRY_REPLY_LEN;
- memcpy(buffp, inqCmdBlk, INQUIRY_CMDLEN);
- res = ioctl(s_fd, SCSI_IOCTL_SEND_COMMAND, inqBuff);
- if (0 == res) {
- to = (int)*(buffp + 7);
- printf(" %.8s %.16s %.4s, byte_7=0x%x\n", buffp + 8,
- buffp + 16, buffp + 32, to);
- }
- else if (res < 0)
- perror("scsi_inquiry: SCSI_IOCTL_SEND_COMMAND err");
- else
- printf("scsi_inquiry: SCSI_IOCTL_SEND_COMMAND status=0x%x\n", res);
-
- res = close(s_fd);
- if (res < 0) {
- perror("scsi_inquiry: close error");
- return 1;
- }
- return 0;
- }
-