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Don't close fds in write_init_super
[thirdparty/mdadm.git] / sg_io.c
1 /*
2 * Copyright (C) 2007-2008 Intel Corporation
3 *
4 * Retrieve drive serial numbers for scsi disks
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19 #include <string.h>
20 #include <scsi/scsi.h>
21 #include <scsi/sg.h>
22 #include <sys/ioctl.h>
23
24 int scsi_get_serial(int fd, void *buf, size_t buf_len)
25 {
26 unsigned char inq_cmd[] = {INQUIRY, 1, 0x80, 0, buf_len, 0};
27 unsigned char sense[32];
28 struct sg_io_hdr io_hdr;
29
30 memset(&io_hdr, 0, sizeof(io_hdr));
31 io_hdr.interface_id = 'S';
32 io_hdr.cmdp = inq_cmd;
33 io_hdr.cmd_len = sizeof(inq_cmd);
34 io_hdr.dxferp = buf;
35 io_hdr.dxfer_len = buf_len;
36 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
37 io_hdr.sbp = sense;
38 io_hdr.mx_sb_len = sizeof(sense);
39 io_hdr.timeout = 5000;
40
41 return ioctl(fd, SG_IO, &io_hdr);
42 }