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freebsd/sbin/camcontrol/util.c
Justin T. Gibbs 525689f102 Camcontrol - A utility for configuring/manipulating the CAM subsystem
Submitted by:	"Kenneth D. Merry" <ken@plutotech.com>
1998-09-15 06:43:02 +00:00

501 lines
10 KiB
C

/*
* Written By Julian ELischer
* Copyright julian Elischer 1993.
* Permission is granted to use or redistribute this file in any way as long
* as this notice remains. Julian Elischer does not guarantee that this file
* is totally correct for any given task and users of this file must
* accept responsibility for any damage that occurs from the application of this
* file.
*
* (julian@tfs.com julian@dialix.oz.au)
*
* User SCSI hooks added by Peter Dufault:
*
* Copyright (c) 1994 HD Associates
* (contact: dufault@hda.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of HD Associates
* may not be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Taken from the original scsi(8) program.
* from: scsi.c,v 1.17 1998/01/12 07:57:57 charnier Exp $";
*/
#ifndef lint
static const char rcsid[] =
"$Id$";
#endif /* not lint */
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/file.h>
#include <signal.h>
#include <unistd.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <camlib.h>
#include "camcontrol.h"
int verbose = 0;
/* iget: Integer argument callback
*/
int
iget(void *hook, char *name)
{
struct get_hook *h = (struct get_hook *)hook;
int arg;
if (h->got >= h->argc)
{
fprintf(stderr, "Expecting an integer argument.\n");
usage();
exit(1);
}
arg = strtol(h->argv[h->got], 0, 0);
h->got++;
if (verbose && name && *name)
printf("%s: %d\n", name, arg);
return arg;
}
/* cget: char * argument callback
*/
char *
cget(void *hook, char *name)
{
struct get_hook *h = (struct get_hook *)hook;
char *arg;
if (h->got >= h->argc)
{
fprintf(stderr, "Expecting a character pointer argument.\n");
usage();
exit(1);
}
arg = h->argv[h->got];
h->got++;
if (verbose && name)
printf("cget: %s: %s", name, arg);
return arg;
}
/* arg_put: "put argument" callback
*/
void
arg_put(void *hook, int letter, void *arg, int count, char *name)
{
if (verbose && name && *name)
printf("%s: ", name);
switch(letter)
{
case 'i':
case 'b':
printf("%d ", (int)arg);
break;
case 'c':
case 'z':
{
char *p;
p = malloc(count + 1);
bzero(p, count +1);
strncpy(p, (char *)arg, count);
if (letter == 'z')
{
int i;
for (i = count - 1; i >= 0; i--)
if (p[i] == ' ')
p[i] = 0;
else
break;
}
printf("%s ", p);
free(p);
}
break;
default:
printf("Unknown format letter: '%c'\n", letter);
}
if (verbose)
putchar('\n');
}
#define START_ENTRY '{'
#define END_ENTRY '}'
static void
skipwhite(FILE *f)
{
int c;
skip_again:
while (isspace(c = getc(f)))
;
if (c == '#') {
while ((c = getc(f)) != '\n' && c != EOF)
;
goto skip_again;
}
ungetc(c, f);
}
/* mode_lookup: Lookup a format description for a given page.
*/
char *mode_db = "/usr/share/misc/scsi_modes";
static char *
mode_lookup(int page)
{
char *new_db;
FILE *modes;
int match, next, found, c;
static char fmt[4096]; /* XXX This should be with strealloc */
int page_desc;
new_db = getenv("SCSI_MODES");
if (new_db)
mode_db = new_db;
modes = fopen(mode_db, "r");
if (modes == 0)
return 0;
next = 0;
found = 0;
while (!found) {
skipwhite(modes);
if (fscanf(modes, "%i", &page_desc) != 1)
break;
if (page_desc == page)
found = 1;
skipwhite(modes);
if (getc(modes) != START_ENTRY)
errx(1, "expected %c", START_ENTRY);
match = 1;
while (match != 0) {
c = getc(modes);
if (c == EOF) {
warnx("expected %c", END_ENTRY);
}
if (c == START_ENTRY) {
match++;
}
if (c == END_ENTRY) {
match--;
if (match == 0)
break;
}
if (found && c != '\n') {
if (next >= sizeof(fmt))
errx(1, "buffer overflow");
fmt[next++] = (u_char)c;
}
}
}
fmt[next] = 0;
return (found) ? fmt : 0;
}
/* -------- edit: Mode Select Editor ---------
*/
struct editinfo
{
int can_edit;
int default_value;
} editinfo[64]; /* XXX Bogus fixed size */
static int editind;
volatile int edit_opened;
static FILE *edit_file;
static char edit_name[L_tmpnam];
static inline void
edit_rewind(void)
{
editind = 0;
}
static void
edit_done(void)
{
int opened;
sigset_t all, prev;
sigfillset(&all);
(void)sigprocmask(SIG_SETMASK, &all, &prev);
opened = (int)edit_opened;
edit_opened = 0;
(void)sigprocmask(SIG_SETMASK, &prev, 0);
if (opened)
{
if (fclose(edit_file))
warn("%s", edit_name);
if (unlink(edit_name))
warn("%s", edit_name);
}
}
static void
edit_init(void)
{
edit_rewind();
if (tmpnam(edit_name) == 0)
errx(1, "tmpnam failed");
if ((edit_file = fopen(edit_name, "w")) == 0)
err(1, "%s", edit_name);
edit_opened = 1;
atexit(edit_done);
}
static void
edit_check(void *hook, int letter, void *arg, int count, char *name)
{
if (letter != 'i' && letter != 'b')
errx(1, "can't edit format %c", letter);
if (editind >= sizeof(editinfo) / sizeof(editinfo[0]))
errx(1, "edit table overflow");
editinfo[editind].can_edit = ((int)arg != 0);
editind++;
}
static void
edit_defaults(void *hook, int letter, void *arg, int count, char *name)
{
if (letter != 'i' && letter != 'b')
errx(1, "can't edit format %c", letter);
editinfo[editind].default_value = ((int)arg);
editind++;
}
static void
edit_report(void *hook, int letter, void *arg, int count, char *name)
{
if (editinfo[editind].can_edit) {
if (letter != 'i' && letter != 'b')
errx(1, "can't report format %c", letter);
fprintf(edit_file, "%s: %d\n", name, (int)arg);
}
editind++;
}
static int
edit_get(void *hook, char *name)
{
int arg = editinfo[editind].default_value;
if (editinfo[editind].can_edit) {
char line[80];
if (fgets(line, sizeof(line), edit_file) == 0)
err(1, "fgets");
line[strlen(line) - 1] = 0;
if (strncmp(name, line, strlen(name)) != 0)
errx(1, "expected \"%s\" and read \"%s\"", name, line);
arg = strtoul(line + strlen(name) + 2, 0, 0);
}
editind++;
return arg;
}
static void
edit_edit(void)
{
char *system_line;
char *editor = getenv("EDITOR");
if (!editor)
editor = "vi";
fclose(edit_file);
system_line = malloc(strlen(editor) + strlen(edit_name) + 6);
sprintf(system_line, "%s %s", editor, edit_name);
system(system_line);
free(system_line);
if ((edit_file = fopen(edit_name, "r")) == 0)
err(1, "%s", edit_name);
}
void
mode_edit(struct cam_device *device, int page, int page_control, int dbd,
int edit, int retry_count, int timeout)
{
int i;
u_char data[255];
u_char *mode_pars;
struct mode_header
{
u_char mdl; /* Mode data length */
u_char medium_type;
u_char dev_spec_par;
u_char bdl; /* Block descriptor length */
};
struct mode_page_header
{
u_char page_code;
u_char page_length;
};
struct mode_header *mh;
struct mode_page_header *mph;
char *fmt = mode_lookup(page);
if (!fmt && verbose) {
fprintf(stderr,
"No mode data base entry in \"%s\" for page %d; "
" binary %s only.\n",
mode_db, page, (edit ? "edit" : "display"));
}
if (edit) {
if (!fmt)
errx(1, "can't edit without a format");
if (page_control != 0 && page_control != 3)
errx(1, "it only makes sense to edit page 0 "
"(current) or page 3 (saved values)");
verbose = 1;
mode_sense(device, page, 1, dbd, retry_count, timeout,
data, sizeof(data));
mh = (struct mode_header *)data;
mph = (struct mode_page_header *)
(((char *)mh) + sizeof(*mh) + mh->bdl);
mode_pars = (char *)mph + sizeof(*mph);
edit_init();
buff_decode_visit(mode_pars, mh->mdl, fmt, edit_check, 0);
mode_sense(device, page, 0, dbd, retry_count, timeout,
data, sizeof(data));
edit_rewind();
buff_decode_visit(mode_pars, mh->mdl, fmt, edit_defaults, 0);
edit_rewind();
buff_decode_visit(mode_pars, mh->mdl, fmt, edit_report, 0);
edit_edit();
edit_rewind();
buff_encode_visit(mode_pars, mh->mdl, fmt, edit_get, 0);
/* Eliminate block descriptors:
*/
bcopy((char *)mph, ((char *)mh) + sizeof(*mh),
sizeof(*mph) + mph->page_length);
mh->bdl = mh->dev_spec_par = 0;
mph = (struct mode_page_header *) (((char *)mh) + sizeof(*mh));
mode_pars = ((char *)mph) + 2;
#if 0
/* Turn this on to see what you're sending to the
* device:
*/
edit_rewind();
buff_decode_visit(mode_pars, mh->mdl, fmt, arg_put, 0);
#endif
edit_done();
/* Make it permanent if pageselect is three.
*/
mph->page_code &= ~0xC0; /* Clear PS and RESERVED */
mh->mdl = 0; /* Reserved for mode select */
mode_select(device, (page_control == 3), retry_count,
timeout, (u_int8_t *)mh, sizeof(*mh) + mh->bdl +
sizeof(*mph) + mph->page_length);
return;
}
mode_sense(device, page, page_control, dbd, retry_count, timeout,
data, sizeof(data));
/* Skip over the block descriptors.
*/
mh = (struct mode_header *)data;
mph = (struct mode_page_header *)(((char *)mh) + sizeof(*mh) + mh->bdl);
mode_pars = (char *)mph + sizeof(*mph);
if (!fmt) {
for (i = 0; i < mh->mdl; i++) {
printf("%02x%c",mode_pars[i],
(((i + 1) % 8) == 0) ? '\n' : ' ');
}
putc('\n', stdout);
} else {
verbose = 1;
buff_decode_visit(mode_pars, mh->mdl, fmt, arg_put, NULL);
}
}