diff options
Diffstat (limited to 'sg_io.c')
| -rw-r--r-- | sg_io.c | 60 |
1 files changed, 60 insertions, 0 deletions
@@ -0,0 +1,60 @@ +/* + * 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; +} |