959 lines
19 KiB
C
959 lines
19 KiB
C
/*
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* Written By Julian ELischer
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* Copyright julian Elischer 1993.
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* Permission is granted to use or redistribute this file in any way as long
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* as this notice remains. Julian Elischer does not guarantee that this file
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* is totally correct for any given task and users of this file must
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* accept responsibility for any damage that occurs from the application of this
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* file.
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*
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* (julian@tfs.com julian@dialix.oz.au)
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*
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* User SCSI hooks added by Peter Dufault:
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*
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* Copyright (c) 1994 HD Associates
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* (contact: dufault@hda.com)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of HD Associates
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* may not be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: scsi.c,v 1.15 1997/03/29 03:33:04 imp Exp $
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/scsiio.h>
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#include <sys/file.h>
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#include <scsi.h>
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#include <ctype.h>
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#include <signal.h>
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#include <err.h>
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int fd;
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int debuglevel;
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int debugflag;
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int commandflag;
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int reprobe;
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int probe_all;
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int verbose = 0;
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int bus = -1; /* all busses */
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int targ = -1; /* all targs */
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int lun = 0; /* just lun 0 */
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int freeze = 0; /* Freeze this many seconds */
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int modeflag;
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int editflag;
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int modepage = 0; /* Read this mode page */
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int pagectl = 0; /* Mode sense page control */
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int seconds = 2;
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void usage(void)
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{
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fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
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"usage: scsi -f device -d debug_level",
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" scsi -f device [-v] -z seconds",
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" scsi -f device -m page [-P pc] [-e]",
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" scsi -f device -p [-b bus] [-l lun]",
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" scsi -f device -r [-b bus] [-t targ] [-l lun]",
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" scsi -f device [-v] [-s seconds] -c cmd_fmt [arg0 ... argn]",
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" -o count out_fmt [arg0 ... argn]",
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" -i count in_fmt");
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exit (1);
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}
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void procargs(int *argc_p, char ***argv_p)
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{
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int argc = *argc_p;
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char **argv = *argv_p;
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extern char *optarg;
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extern int optind;
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int fflag,
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ch;
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fflag = 0;
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commandflag = 0;
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debugflag = 0;
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while ((ch = getopt(argc, argv, "ceprvf:d:b:t:l:z:m:P:s:")) != -1) {
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switch (ch) {
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case 'p':
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probe_all = 1;
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break;
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case 'r':
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reprobe = 1;
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break;
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case 'c':
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commandflag = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'e':
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editflag = 1;
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break;
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case 'f':
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if ((fd = scsi_open(optarg, O_RDWR)) < 0)
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err(errno, "unable to open device %s", optarg);
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fflag = 1;
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break;
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case 'd':
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debuglevel = strtol(optarg, 0, 0);
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debugflag = 1;
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break;
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case 'b':
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bus = strtol(optarg, 0, 0);
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break;
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case 't':
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targ = strtol(optarg, 0, 0);
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break;
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case 'l':
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lun = strtol(optarg, 0, 0);
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break;
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case 'z':
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freeze = strtol(optarg, 0, 0);
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break;
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case 'P':
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pagectl = strtol(optarg, 0, 0);
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break;
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case 's':
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seconds = strtol(optarg, 0, 0);
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break;
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case 'm':
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modeflag = 1;
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modepage = strtol(optarg, 0, 0);
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break;
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case '?':
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default:
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usage();
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}
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}
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*argc_p = argc - optind;
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*argv_p = argv + optind;
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if (!fflag) usage();
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}
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/* get_hook: Structure for evaluating args in a callback.
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*/
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struct get_hook
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{
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int argc;
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char **argv;
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int got;
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};
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/* iget: Integer argument callback
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*/
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int iget(void *hook, char *name)
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{
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struct get_hook *h = (struct get_hook *)hook;
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int arg;
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if (h->got >= h->argc)
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{
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fprintf(stderr, "Expecting an integer argument.\n");
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usage();
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}
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arg = strtol(h->argv[h->got], 0, 0);
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h->got++;
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if (verbose && name && *name)
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printf("%s: %d\n", name, arg);
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return arg;
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}
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/* cget: char * argument callback
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*/
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char *cget(void *hook, char *name)
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{
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struct get_hook *h = (struct get_hook *)hook;
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char *arg;
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if (h->got >= h->argc)
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{
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fprintf(stderr, "Expecting a character pointer argument.\n");
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usage();
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}
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arg = h->argv[h->got];
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h->got++;
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if (verbose && name)
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printf("cget: %s: %s", name, arg);
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return arg;
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}
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/* arg_put: "put argument" callback
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*/
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void arg_put(void *hook, int letter, void *arg, int count, char *name)
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{
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if (verbose && name && *name)
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printf("%s: ", name);
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switch(letter)
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{
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case 'i':
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case 'b':
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printf("%d ", (int)arg);
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break;
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case 'c':
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case 'z':
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{
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char *p = malloc(count + 1);
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p[count] = 0;
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strncpy(p, (char *)arg, count);
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if (letter == 'z')
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{
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int i;
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for (i = count - 1; i >= 0; i--)
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if (p[i] == ' ')
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p[i] = 0;
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else
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break;
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}
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printf("%s ", p);
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}
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break;
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default:
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printf("Unknown format letter: '%c'\n", letter);
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}
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if (verbose)
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putchar('\n');
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}
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int arg_get (void *hook, char *field_name)
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{
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printf("get \"%s\".\n", field_name);
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return 0;
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}
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/* data_phase: SCSI bus data phase: DATA IN, DATA OUT, or no data transfer.
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*/
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enum data_phase {none = 0, in, out};
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/* do_cmd: Send a command to a SCSI device
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*/
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static void
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do_cmd(int fd, char *fmt, int argc, char **argv)
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{
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struct get_hook h;
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scsireq_t *scsireq = scsireq_new();
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enum data_phase data_phase;
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int count, amount;
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char *data_fmt, *bp;
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h.argc = argc;
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h.argv = argv;
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h.got = 0;
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scsireq_reset(scsireq);
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scsireq_build_visit(scsireq, 0, 0, 0, fmt, iget, (void *)&h);
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/* Three choices here:
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* 1. We've used up all the args and have no data phase.
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* 2. We have input data ("-i")
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* 3. We have output data ("-o")
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*/
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if (h.got >= h.argc)
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{
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data_phase = none;
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count = scsireq->datalen = 0;
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}
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else
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{
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char *flag = cget(&h, 0);
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if (strcmp(flag, "-o") == 0)
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{
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data_phase = out;
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scsireq->flags = SCCMD_WRITE;
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}
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else if (strcmp(flag, "-i") == 0)
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{
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data_phase = in;
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scsireq->flags = SCCMD_READ;
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}
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else
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{
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fprintf(stderr,
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"Need either \"-i\" or \"-o\" for data phase; not \"%s\".\n", flag);
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usage();
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}
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count = scsireq->datalen = iget(&h, 0);
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if (count)
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{
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data_fmt = cget(&h, 0);
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scsireq->databuf = malloc(count);
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if (data_phase == out)
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{
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if (strcmp(data_fmt, "-") == 0) /* Read data from stdin */
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{
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bp = (char *)scsireq->databuf;
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while (count > 0 && (amount = read(0, bp, count)) > 0)
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{
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count -= amount;
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bp += amount;
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}
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if (amount == -1)
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{
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perror("read");
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exit(errno);
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}
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else if (amount == 0)
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{
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/* early EOF */
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fprintf(stderr,
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"Warning: only read %lu bytes out of %lu.\n",
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scsireq->datalen - (u_long)count,
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scsireq->datalen);
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scsireq->datalen -= (u_long)count;
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}
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}
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else
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{
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bzero(scsireq->databuf, count);
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scsireq_encode_visit(scsireq, data_fmt, iget, (void *)&h);
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}
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}
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}
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}
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scsireq->timeout = seconds * 1000;
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if (scsireq_enter(fd, scsireq) == -1)
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{
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scsi_debug(stderr, -1, scsireq);
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exit(errno);
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}
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if (SCSIREQ_ERROR(scsireq))
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scsi_debug(stderr, 0, scsireq);
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if (count && data_phase == in)
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{
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if (strcmp(data_fmt, "-") == 0) /* stdout */
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{
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bp = (char *)scsireq->databuf;
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while (count > 0 && (amount = write(1, bp, count)) > 0)
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{
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count -= amount;
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bp += amount;
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}
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if (amount < 0)
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{
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perror("write");
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exit(errno);
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}
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else if (amount == 0)
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fprintf(stderr, "Warning: wrote only %d bytes out of %d.\n",
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scsireq->datalen - count,
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scsireq->datalen);
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}
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else
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{
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scsireq_decode_visit(scsireq, data_fmt, arg_put, 0);
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putchar('\n');
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}
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}
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}
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static void
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freeze_ioctl(int fd, int op, void *data)
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{
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if (ioctl(fd, SCIOCFREEZE, 0) == -1) {
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if (errno == ENODEV) {
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fprintf(stderr,
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"Your kernel must be configured with option SCSI_FREEZE.\n");
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}
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else
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perror("SCIOCFREEZE");
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exit(errno);
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}
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}
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/* do_freeze: Freeze the bus for a given number of seconds.
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*/
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static void do_freeze(int seconds)
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{
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if (seconds == -1) {
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printf("Hit return to thaw: ");
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fflush(stdout);
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sync();
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freeze_ioctl(fd, SCIOCFREEZE, 0);
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(void)getchar();
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freeze_ioctl(fd, SCIOCTHAW, 0);
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}
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else {
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sync();
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freeze_ioctl(fd, SCIOCFREEZETHAW, &seconds);
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if (verbose) {
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putchar('\007');
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fflush(stdout);
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}
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freeze_ioctl(fd, SCIOCWAITTHAW, 0);
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if (verbose) {
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putchar('\007');
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fflush(stdout);
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}
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}
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}
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void mode_sense(int fd, u_char *data, int len, int pc, int page)
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{
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scsireq_t *scsireq;
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bzero(data, len);
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scsireq = scsireq_new();
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if (scsireq_enter(fd, scsireq_build(scsireq,
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len, data, SCCMD_READ,
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"1A 0 v:2 {Page Control} v:6 {Page Code} 0 v:i1 {Allocation Length} 0",
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pc, page, len)) == -1) /* Mode sense */
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{
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scsi_debug(stderr, -1, scsireq);
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exit(errno);
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}
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if (SCSIREQ_ERROR(scsireq))
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{
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scsi_debug(stderr, 0, scsireq);
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exit(-1);
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}
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free(scsireq);
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}
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void mode_select(int fd, u_char *data, int len, int perm)
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{
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scsireq_t *scsireq;
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scsireq = scsireq_new();
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if (scsireq_enter(fd, scsireq_build(scsireq,
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len, data, SCCMD_WRITE,
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"15 0:7 v:1 {SP} 0 0 v:i1 {Allocation Length} 0", perm, len)) == -1) /* Mode select */
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{
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scsi_debug(stderr, -1, scsireq);
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exit(errno);
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}
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if (SCSIREQ_ERROR(scsireq))
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{
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scsi_debug(stderr, 0, scsireq);
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exit(-1);
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}
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free(scsireq);
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}
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#define START_ENTRY '{'
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#define END_ENTRY '}'
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static void
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skipwhite(FILE *f)
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{
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int c;
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skip_again:
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while (isspace(c = getc(f)))
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;
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if (c == '#') {
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while ((c = getc(f)) != '\n' && c != EOF)
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;
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goto skip_again;
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}
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ungetc(c, f);
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}
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/* mode_lookup: Lookup a format description for a given page.
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*/
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char *mode_db = "/usr/share/misc/scsi_modes";
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static char *mode_lookup(int page)
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{
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char *new_db;
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FILE *modes;
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int match, next, found, c;
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static char fmt[1024]; /* XXX This should be with strealloc */
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int page_desc;
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new_db = getenv("SCSI_MODES");
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if (new_db)
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mode_db = new_db;
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modes = fopen(mode_db, "r");
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if (modes == 0)
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return 0;
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next = 0;
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found = 0;
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while (!found) {
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skipwhite(modes);
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if (fscanf(modes, "%i", &page_desc) != 1)
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break;
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if (page_desc == page)
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found = 1;
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skipwhite(modes);
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if (getc(modes) != START_ENTRY) {
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fprintf(stderr, "Expected %c.\n", START_ENTRY);
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exit(-1);
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}
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match = 1;
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while (match != 0) {
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c = getc(modes);
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if (c == EOF) {
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fprintf(stderr, "Expected %c.\n", END_ENTRY);
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}
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if (c == START_ENTRY) {
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match++;
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}
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if (c == END_ENTRY) {
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match--;
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if (match == 0)
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break;
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}
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if (found && c != '\n') {
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if (next >= sizeof(fmt)) {
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fprintf(stderr, "Stupid program: Buffer overflow.\n");
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exit(ENOMEM);
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}
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fmt[next++] = (u_char)c;
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}
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}
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}
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fmt[next] = 0;
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return (found) ? fmt : 0;
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}
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/* -------- edit: Mode Select Editor ---------
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*/
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struct editinfo
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{
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int can_edit;
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int default_value;
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} editinfo[64]; /* XXX Bogus fixed size */
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static int editind;
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volatile int edit_opened;
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static FILE *edit_file;
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static char edit_name[L_tmpnam];
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static inline void
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edit_rewind(void)
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{
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editind = 0;
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}
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static void
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edit_done(void)
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{
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int opened;
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sigset_t all, prev;
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sigfillset(&all);
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(void)sigprocmask(SIG_SETMASK, &all, &prev);
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opened = (int)edit_opened;
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edit_opened = 0;
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(void)sigprocmask(SIG_SETMASK, &prev, 0);
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if (opened)
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{
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if (fclose(edit_file))
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perror(edit_name);
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if (unlink(edit_name))
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perror(edit_name);
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}
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}
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static void
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edit_init(void)
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{
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edit_rewind();
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if (tmpnam(edit_name) == 0) {
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perror("tmpnam failed");
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exit(errno);
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}
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if ( (edit_file = fopen(edit_name, "w")) == 0) {
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perror(edit_name);
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exit(errno);
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}
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edit_opened = 1;
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atexit(edit_done);
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}
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static void
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edit_check(void *hook, int letter, void *arg, int count, char *name)
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{
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if (letter != 'i' && letter != 'b') {
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fprintf(stderr, "Can't edit format %c.\n", letter);
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exit(-1);
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}
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if (editind >= sizeof(editinfo) / sizeof(editinfo[0])) {
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fprintf(stderr, "edit table overflow\n");
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exit(ENOMEM);
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}
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editinfo[editind].can_edit = ((int)arg != 0);
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editind++;
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}
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static void
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edit_defaults(void *hook, int letter, void *arg, int count, char *name)
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{
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if (letter != 'i' && letter != 'b') {
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fprintf(stderr, "Can't edit format %c.\n", letter);
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exit(-1);
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}
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editinfo[editind].default_value = ((int)arg);
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editind++;
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}
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static void
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edit_report(void *hook, int letter, void *arg, int count, char *name)
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{
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if (editinfo[editind].can_edit) {
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if (letter != 'i' && letter != 'b') {
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fprintf(stderr, "Can't report format %c.\n", letter);
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exit(-1);
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}
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fprintf(edit_file, "%s: %d\n", name, (int)arg);
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}
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editind++;
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}
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static int
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edit_get(void *hook, char *name)
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{
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int arg = editinfo[editind].default_value;
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if (editinfo[editind].can_edit) {
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char line[80];
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if (fgets(line, sizeof(line), edit_file) == 0) {
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perror("fgets");
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exit(errno);
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}
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line[strlen(line) - 1] = 0;
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if (strncmp(name, line, strlen(name)) != 0) {
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fprintf(stderr, "Expected \"%s\" and read \"%s\"\n",
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name, line);
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exit(-1);
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}
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arg = strtoul(line + strlen(name) + 2, 0, 0);
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}
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editind++;
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return arg;
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}
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static void
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edit_edit(void)
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{
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char *system_line;
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char *editor = getenv("EDITOR");
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if (!editor)
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editor = "vi";
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fclose(edit_file);
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system_line = malloc(strlen(editor) + strlen(edit_name) + 6);
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sprintf(system_line, "%s %s", editor, edit_name);
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system(system_line);
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free(system_line);
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if ( (edit_file = fopen(edit_name, "r")) == 0) {
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perror(edit_name);
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exit(errno);
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}
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}
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static void
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mode_edit(int fd, int page, int edit, int argc, char *argv[])
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{
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int i;
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u_char data[255];
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u_char *mode_pars;
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struct mode_header
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{
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u_char mdl; /* Mode data length */
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u_char medium_type;
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u_char dev_spec_par;
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u_char bdl; /* Block descriptor length */
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};
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struct mode_page_header
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{
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u_char page_code;
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u_char page_length;
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};
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struct mode_header *mh;
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struct mode_page_header *mph;
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char *fmt = mode_lookup(page);
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if (!fmt && verbose) {
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fprintf(stderr,
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"No mode data base entry in \"%s\" for page %d; binary %s only.\n",
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mode_db, page, (edit ? "edit" : "display"));
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}
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if (edit) {
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if (!fmt) {
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fprintf(stderr, "Sorry: can't edit without a format.\n");
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exit(-1);
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}
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if (pagectl != 0 && pagectl != 3) {
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fprintf(stderr,
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"It only makes sense to edit page 0 (current) or page 3 (saved values)\n");
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exit(-1);
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}
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verbose = 1;
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mode_sense(fd, data, sizeof(data), 1, page);
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mh = (struct mode_header *)data;
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mph = (struct mode_page_header *)
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(((char *)mh) + sizeof(*mh) + mh->bdl);
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mode_pars = (char *)mph + sizeof(*mph);
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edit_init();
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scsireq_buff_decode_visit(mode_pars, mh->mdl,
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fmt, edit_check, 0);
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mode_sense(fd, data, sizeof(data), 0, page);
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edit_rewind();
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scsireq_buff_decode_visit(mode_pars, mh->mdl,
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fmt, edit_defaults, 0);
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edit_rewind();
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scsireq_buff_decode_visit(mode_pars, mh->mdl,
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fmt, edit_report, 0);
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edit_edit();
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edit_rewind();
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scsireq_buff_encode_visit(mode_pars, mh->mdl,
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fmt, edit_get, 0);
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/* Eliminate block descriptors:
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*/
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bcopy((char *)mph, ((char *)mh) + sizeof(*mh),
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sizeof(*mph) + mph->page_length);
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mh->bdl = mh->dev_spec_par = 0;
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mph = (struct mode_page_header *) (((char *)mh) + sizeof(*mh));
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mode_pars = ((char *)mph) + 2;
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#if 0
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/* Turn this on to see what you're sending to the
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* device:
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*/
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edit_rewind();
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scsireq_buff_decode_visit(mode_pars,
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mh->mdl, fmt, arg_put, 0);
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#endif
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edit_done();
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/* Make it permanent if pageselect is three.
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*/
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mph->page_code &= ~0xC0; /* Clear PS and RESERVED */
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mh->mdl = 0; /* Reserved for mode select */
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mode_select(fd, (char *)mh,
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sizeof(*mh) + mh->bdl + sizeof(*mph) + mph->page_length,
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(pagectl == 3));
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exit(0);
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}
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mode_sense(fd, data, sizeof(data), pagectl, page);
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/* Skip over the block descriptors.
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*/
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mh = (struct mode_header *)data;
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mph = (struct mode_page_header *)(((char *)mh) + sizeof(*mh) + mh->bdl);
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mode_pars = (char *)mph + sizeof(*mph);
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if (!fmt) {
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for (i = 0; i < mh->mdl; i++) {
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printf("%02x%c",mode_pars[i],
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(((i + 1) % 8) == 0) ? '\n' : ' ');
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}
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putc('\n', stdout);
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} else {
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verbose = 1;
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scsireq_buff_decode_visit(mode_pars,
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mh->mdl, fmt, arg_put, 0);
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}
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}
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/* do_probe_all: Loop over all SCSI IDs and see if something is
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* there. This only does BUS 0 LUN 0.
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*/
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void do_probe_all(void)
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{
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scsireq_t *scsireq;
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char vendor_id[8 + 1], product_id[16 + 1], revision[4 + 1];
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int id;
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u_char *inq_buf = malloc(96);
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struct scsi_addr addr;
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scsireq = scsireq_build(scsireq_new(),
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96, inq_buf, SCCMD_READ,
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"12 0 0 0 v 0", 96);
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addr.scbus = (bus == -1) ? 0 : bus;
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addr.lun = lun;
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if (addr.scbus || addr.lun)
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{
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printf("For bus %d lun %d:\n", addr.scbus, addr.lun);
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}
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for (id = 0; id < 8; id++)
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{
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addr.target = id;
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printf("%d: ", id);
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if (ioctl(fd, SCIOCADDR, &addr) == -1) {
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if (errno == ENXIO)
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{
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errno = 0;
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printf("nothing.\n");
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}
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else
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printf("SCIOCADDR: %s\n", strerror(errno));
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continue;
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}
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if (scsireq_enter(fd, scsireq) == -1) {
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printf("scsireq_enter: %s\n", strerror(errno));
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continue;
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}
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vendor_id[sizeof(vendor_id) - 1] = 0;
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product_id[sizeof(product_id) - 1] = 0;
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revision[sizeof(revision) - 1] = 0;
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scsireq_decode(scsireq, "s8 c8 c16 c4",
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vendor_id, product_id, revision);
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printf("%s %s %s\n", vendor_id, product_id, revision);
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}
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}
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void main(int argc, char **argv)
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{
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struct scsi_addr scaddr;
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procargs(&argc,&argv);
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/* XXX This has grown to the point that it should be cleaned up.
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*/
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if (freeze) {
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do_freeze(freeze);
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} else if (probe_all) {
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do_probe_all();
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} else if(reprobe) {
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scaddr.scbus = bus;
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scaddr.target = targ;
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scaddr.lun = lun;
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if (ioctl(fd,SCIOCREPROBE,&scaddr) == -1)
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perror("ioctl");
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} else if(debugflag) {
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if (ioctl(fd,SCIOCDEBUG,&debuglevel) == -1)
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{
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perror("ioctl [SCIODEBUG]");
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exit(1);
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}
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} else if (commandflag) {
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char *fmt;
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if (argc < 1) {
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fprintf(stderr, "Need the command format string.\n");
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usage();
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}
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fmt = argv[0];
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argc -= 1;
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argv += 1;
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do_cmd(fd, fmt, argc, argv);
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} else if (modeflag) {
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mode_edit(fd, modepage, editflag, argc, argv);
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}
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exit(0);
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}
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