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-rw-r--r--sg_io.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/sg_io.c b/sg_io.c
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index 0000000..7889a95
--- /dev/null
+++ b/sg_io.c
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+/*
+ * Copyright (C) 2007-2008 Intel Corporation
+ *
+ * Retrieve drive serial numbers for scsi disks
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <string.h>
+#include <scsi/scsi.h>
+#include <scsi/sg.h>
+#include <sys/ioctl.h>
+
+int scsi_get_serial(int fd, void *buf, size_t buf_len)
+{
+ unsigned char rsp_buf[255];
+ unsigned char inq_cmd[] = {INQUIRY, 1, 0x80, 0, sizeof(rsp_buf), 0};
+ unsigned char sense[32];
+ struct sg_io_hdr io_hdr;
+ int rv;
+ unsigned int rsp_len;
+
+ memset(&io_hdr, 0, sizeof(io_hdr));
+ io_hdr.interface_id = 'S';
+ io_hdr.cmdp = inq_cmd;
+ io_hdr.cmd_len = sizeof(inq_cmd);
+ io_hdr.dxferp = rsp_buf;
+ io_hdr.dxfer_len = sizeof(rsp_buf);
+ io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+ io_hdr.sbp = sense;
+ io_hdr.mx_sb_len = sizeof(sense);
+ io_hdr.timeout = 5000;
+
+ rv = ioctl(fd, SG_IO, &io_hdr);
+
+ if (rv)
+ return rv;
+
+ if ((io_hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK)
+ return -1;
+
+ rsp_len = rsp_buf[3];
+
+ if (!rsp_len || buf_len < rsp_len)
+ return -1;
+
+ memcpy(buf, &rsp_buf[4], rsp_len);
+
+ return 0;
+}