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#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include "sg_lib.h"
#include "sg_cmds.h"
/* A utility program for the Linux OS SCSI subsystem.
* Copyright (C) 2004-2006 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 issues the SCSI command WRITE LONG to a given SCSI device.
It sends the command with the logical block address passed as the lba
argument, and the transfer length set to the xfer_len argument. the
buffer to be writen to the device filled with 0xff, this buffer includes
the sector data and the ECC bytes.
This code was contributed by Saeed Bishara
*/
static char * version_str = "1.10 20060623";
#define MAX_XFER_LEN 10000
/* #define SG_DEBUG */
#define ME "sg_write_long: "
#define EBUFF_SZ 256
static struct option long_options[] = {
{"cor_dis", 0, 0, 'c'},
{"help", 0, 0, 'h'},
{"in", 1, 0, 'i'},
{"lba", 1, 0, 'l'},
{"verbose", 0, 0, 'v'},
{"version", 0, 0, 'V'},
{"xfer_len", 1, 0, 'x'},
{0, 0, 0, 0},
};
static void usage()
{
fprintf(stderr, "Usage: "
"sg_write_long [--cor_dis] [--help] [--in=<name>] [--lba=<num>]\n"
" [--verbose] [--version] [--xfer_len=<num>] "
"<scsi_device>\n"
" where: --cor_dis set correction disabled bit\n"
" --help print out usage message\n"
" --in=<name> input from file <name> (default write "
"0xff bytes)\n"
" --lba=<num>|-l <num> logical block address (default 0)\n"
" --verbose|-v increase verbosity\n"
" --version|-V print version string then exit\n"
" --xfer_len=<num>|-x <num> transfer length (< 10000) "
"default 520\n"
"\n To read from a defected sector use:\n"
" sg_dd if=<scsi_device> skip=<lba> of=/dev/null bs=512 "
"count=1\n"
" To write to a defected sector use:\n"
" sg_dd of=<scsi_device> seek=<lba> if=/dev/zero bs=512 "
"count=1\n\n"
"Performs a WRITE LONG (10) SCSI command\n"
);
}
int main(int argc, char * argv[])
{
int sg_fd, res, c, infd, offset;
unsigned char * writeLongBuff = NULL;
void * rawp = NULL;
int xfer_len = 520;
int cor_dis = 0;
unsigned long lba = 0;
int verbose = 0;
int got_stdin;
char device_name[256];
char file_name[256];
char ebuff[EBUFF_SZ];
int ret = 1;
memset(device_name, 0, sizeof device_name);
memset(file_name, 0, sizeof file_name);
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "chi:l:vVx:", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'c':
cor_dis = 1;
break;
case 'h':
case '?':
usage();
return 0;
case 'i':
strncpy(file_name, optarg, sizeof(file_name));
break;
case 'l':
lba = sg_get_num(optarg);
if ((unsigned long)(-1) == lba) {
fprintf(stderr, "bad argument to '--lba'\n");
return SG_LIB_SYNTAX_ERROR;
}
break;
case 'v':
++verbose;
break;
case 'V':
fprintf(stderr, ME "version: %s\n", version_str);
return 0;
case 'x':
xfer_len = sg_get_num(optarg);
if (-1 == xfer_len) {
fprintf(stderr, "bad argument to '--xfer_len'\n");
return SG_LIB_SYNTAX_ERROR;
}
break;
default:
fprintf(stderr, "unrecognised switch code 0x%x ??\n", c);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
if (optind < argc) {
if ('\0' == device_name[0]) {
strncpy(device_name, argv[optind], sizeof(device_name) - 1);
device_name[sizeof(device_name) - 1] = '\0';
++optind;
}
if (optind < argc) {
for (; optind < argc; ++optind)
fprintf(stderr, "Unexpected extra argument: %s\n",
argv[optind]);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
if (0 == device_name[0]) {
fprintf(stderr, "missing device name!\n");
usage();
return SG_LIB_SYNTAX_ERROR;
}
if (xfer_len >= MAX_XFER_LEN){
fprintf(stderr, "xfer_len (%d) is out of range ( < %d)\n",
xfer_len, MAX_XFER_LEN);
usage();
return SG_LIB_SYNTAX_ERROR;
}
sg_fd = sg_cmds_open_device(device_name, 0 /* rw */, verbose);
if (sg_fd < 0) {
fprintf(stderr, ME "open error: %s: %s\n", device_name,
safe_strerror(-sg_fd));
return SG_LIB_FILE_ERROR;
}
if (NULL == (rawp = malloc(MAX_XFER_LEN))) {
fprintf(stderr, ME "out of memory (query)\n");
sg_cmds_close_device(sg_fd);
return SG_LIB_SYNTAX_ERROR;
}
writeLongBuff = rawp;
memset(rawp, 0xff, MAX_XFER_LEN);
if (file_name[0]) {
got_stdin = (0 == strcmp(file_name, "-")) ? 1 : 0;
if (got_stdin)
infd = 0;
else {
if ((infd = open(file_name, O_RDONLY)) < 0) {
snprintf(ebuff, EBUFF_SZ,
ME "could not open %s for reading", file_name);
perror(ebuff);
goto err_out;
}
}
res = read(infd, writeLongBuff, xfer_len);
if (res < 0) {
snprintf(ebuff, EBUFF_SZ, ME "couldn't read from %s", file_name);
perror(ebuff);
goto err_out;
}
if (res < xfer_len) {
fprintf(stderr, "tried to read %d bytes from %s, got %d bytes\n",
xfer_len, file_name, res);
fprintf(stderr, "pad with 0xff bytes and continue\n");
}
if (! got_stdin)
close(infd);
}
if (verbose)
fprintf(stderr, ME "issue write long to device %s\n\t\txfer_len= %d "
"(0x%x), lba=%lu (0x%lx)\n", device_name, xfer_len, xfer_len,
lba, lba);
res = sg_ll_write_long10(sg_fd, cor_dis, lba, writeLongBuff, xfer_len,
&offset, 1, verbose);
ret = res;
switch (res) {
case 0:
break;
case SG_LIB_CAT_NOT_READY:
fprintf(stderr, " SCSI WRITE LONG (10) failed, device not ready\n");
break;
case SG_LIB_CAT_UNIT_ATTENTION:
fprintf(stderr, " SCSI WRITE LONG (10), unit attention\n");
break;
case SG_LIB_CAT_INVALID_OP:
fprintf(stderr, " SCSI WRITE LONG (10) command not supported\n");
break;
case SG_LIB_CAT_ILLEGAL_REQ:
fprintf(stderr, " SCSI WRITE LONG (10) command, bad field in cdb\n");
break;
case SG_LIB_CAT_ILLEGAL_REQ_WITH_INFO:
fprintf(stderr, "<<< device indicates 'xfer_len' should be %d "
">>>\n", xfer_len - offset);
break;
default:
fprintf(stderr, " SCSI WRITE LONG (10) command error\n");
break;
}
err_out:
if (rawp)
free(rawp);
res = sg_cmds_close_device(sg_fd);
if (res < 0) {
fprintf(stderr, "close error: %s\n", safe_strerror(-res));
if (0 == ret)
return SG_LIB_FILE_ERROR;
}
return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
}
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