872 lines
19 KiB
C
872 lines
19 KiB
C
/* $OpenBSD: chio.c,v 1.30 2022/10/11 03:37:14 jsg Exp $ */
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/* $NetBSD: chio.c,v 1.1.1.1 1996/04/03 00:34:38 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Jason R. Thorpe <thorpej@and.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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgments:
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* This product includes software developed by Jason R. Thorpe
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* for And Communications, http://www.and.com/
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/mtio.h>
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#include <sys/chio.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include "defs.h"
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#include "pathnames.h"
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#define _PATH_CH_CONF "/etc/chio.conf"
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extern char *parse_tapedev(const char *, const char *, int); /* parse.y */
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extern char *__progname; /* from crt0.o */
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static void usage(void);
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static int parse_element_type(char *);
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static int parse_element_unit(char *);
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static int parse_special(char *);
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static int is_special(char *);
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static const char * element_type_name(int et);
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static char *bits_to_string(int, const char *);
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static void find_voltag(char *, int *, int *);
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static void check_source_drive(int);
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static int do_move(char *, int, char **);
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static int do_exchange(char *, int, char **);
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static int do_position(char *, int, char **);
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static int do_params(char *, int, char **);
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static int do_getpicker(char *, int, char **);
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static int do_setpicker(char *, int, char **);
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static int do_status(char *, int, char **);
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/* Valid changer element types. */
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const struct element_type elements[] = {
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{ "drive", CHET_DT },
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{ "picker", CHET_MT },
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{ "portal", CHET_IE },
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{ "slot", CHET_ST },
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{ NULL, 0 },
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};
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/* Valid commands. */
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const struct changer_command commands[] = {
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{ "exchange", do_exchange },
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{ "getpicker", do_getpicker },
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{ "move", do_move },
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{ "params", do_params },
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{ "position", do_position },
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{ "setpicker", do_setpicker },
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{ "status", do_status },
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{ NULL, 0 },
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};
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/* Valid special words. */
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const struct special_word specials[] = {
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{ "inv", SW_INVERT },
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{ "inv1", SW_INVERT1 },
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{ "inv2", SW_INVERT2 },
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{ NULL, 0 },
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};
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static int changer_fd;
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static char *changer_name;
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static int avoltag;
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static int pvoltag;
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static int sense;
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static int source;
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int
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main(int argc, char *argv[])
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{
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int ch, i;
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while ((ch = getopt(argc, argv, "f:")) != -1) {
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switch (ch) {
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case 'f':
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changer_name = optarg;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc == 0)
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usage();
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/* Get the default changer if not already specified. */
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if (changer_name == NULL)
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if ((changer_name = getenv(CHANGER_ENV_VAR)) == NULL)
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changer_name = _PATH_CH;
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/* Open the changer device. */
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if ((changer_fd = open(changer_name, O_RDWR)) == -1)
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err(1, "%s: open", changer_name);
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/* Find the specified command. */
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for (i = 0; commands[i].cc_name != NULL; ++i)
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if (strcmp(*argv, commands[i].cc_name) == 0)
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break;
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if (commands[i].cc_name == NULL) {
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/* look for abbreviation */
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for (i = 0; commands[i].cc_name != NULL; ++i)
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if (strncmp(*argv, commands[i].cc_name,
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strlen(*argv)) == 0)
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break;
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}
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if (commands[i].cc_name == NULL)
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errx(1, "unknown command: %s", *argv);
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exit((*commands[i].cc_handler)(commands[i].cc_name, argc, argv));
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}
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static int
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do_move(char *cname, int argc, char *argv[])
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{
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struct changer_move cmd;
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int val;
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/*
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* On a move command, we expect the following:
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*
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* <from ET> <from EU> <to ET> <to EU> [inv]
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*
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* where ET == element type and EU == element unit.
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*/
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++argv; --argc;
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if (argc < 4) {
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warnx("%s: too few arguments", cname);
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goto usage;
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} else if (argc > 5) {
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warnx("%s: too many arguments", cname);
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goto usage;
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}
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bzero(&cmd, sizeof(cmd));
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/*
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* Get the from ET and EU - we search for it if the ET is
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* "voltag", otherwise, we just use the ET and EU given to us.
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*/
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if (strcmp(*argv, "voltag") == 0) {
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++argv; --argc;
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find_voltag(*argv, &cmd.cm_fromtype, &cmd.cm_fromunit);
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++argv; --argc;
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} else {
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cmd.cm_fromtype = parse_element_type(*argv);
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++argv; --argc;
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cmd.cm_fromunit = parse_element_unit(*argv);
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++argv; --argc;
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}
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if (cmd.cm_fromtype == CHET_DT)
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check_source_drive(cmd.cm_fromunit);
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/*
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* Don't allow voltag on the to ET, using a volume
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* as a destination makes no sense on a move
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*/
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cmd.cm_totype = parse_element_type(*argv);
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++argv; --argc;
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cmd.cm_tounit = parse_element_unit(*argv);
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++argv; --argc;
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/* Deal with optional command modifier. */
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if (argc) {
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val = parse_special(*argv);
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switch (val) {
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case SW_INVERT:
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cmd.cm_flags |= CM_INVERT;
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break;
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default:
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errx(1, "%s: inappropriate modifier `%s'",
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cname, *argv);
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/* NOTREACHED */
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}
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}
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/* Send command to changer. */
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if (ioctl(changer_fd, CHIOMOVE, &cmd) == -1)
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err(1, "%s: CHIOMOVE", changer_name);
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return (0);
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usage:
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fprintf(stderr, "usage: %s %s "
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"<from ET> <from EU> <to ET> <to EU> [inv]\n", __progname, cname);
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return (1);
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}
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static int
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do_exchange(char *cname, int argc, char *argv[])
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{
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struct changer_exchange cmd;
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int val;
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/*
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* On an exchange command, we expect the following:
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*
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* <src ET> <src EU> <dst1 ET> <dst1 EU> [<dst2 ET> <dst2 EU>] [inv1] [inv2]
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*
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* where ET == element type and EU == element unit.
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*/
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++argv; --argc;
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if (argc < 4) {
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warnx("%s: too few arguments", cname);
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goto usage;
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} else if (argc > 8) {
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warnx("%s: too many arguments", cname);
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goto usage;
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}
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bzero(&cmd, sizeof(cmd));
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/* <src ET> */
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cmd.ce_srctype = parse_element_type(*argv);
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++argv; --argc;
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/* <src EU> */
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cmd.ce_srcunit = parse_element_unit(*argv);
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++argv; --argc;
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/* <dst1 ET> */
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cmd.ce_fdsttype = parse_element_type(*argv);
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++argv; --argc;
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/* <dst1 EU> */
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cmd.ce_fdstunit = parse_element_unit(*argv);
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++argv; --argc;
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/*
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* If the next token is a special word or there are no more
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* arguments, then this is a case of simple exchange.
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* dst2 == src.
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*/
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if ((argc == 0) || is_special(*argv)) {
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cmd.ce_sdsttype = cmd.ce_srctype;
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cmd.ce_sdstunit = cmd.ce_srcunit;
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goto do_special;
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}
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/* <dst2 ET> */
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cmd.ce_sdsttype = parse_element_type(*argv);
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++argv; --argc;
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/* <dst2 EU> */
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cmd.ce_sdstunit = parse_element_unit(*argv);
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++argv; --argc;
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do_special:
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/* Deal with optional command modifiers. */
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while (argc) {
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val = parse_special(*argv);
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++argv; --argc;
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switch (val) {
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case SW_INVERT1:
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cmd.ce_flags |= CE_INVERT1;
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break;
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case SW_INVERT2:
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cmd.ce_flags |= CE_INVERT2;
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break;
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default:
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errx(1, "%s: inappropriate modifier `%s'",
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cname, *argv);
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/* NOTREACHED */
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}
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}
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/* Send command to changer. */
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if (ioctl(changer_fd, CHIOEXCHANGE, &cmd) == -1)
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err(1, "%s: CHIOEXCHANGE", changer_name);
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return (0);
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usage:
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fprintf(stderr, "usage: %s %s <src ET> <src EU> <dst1 ET> <dst1 EU>\n"
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" [<dst2 ET> <dst2 EU>] [inv1] [inv2]\n",
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__progname, cname);
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return (1);
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}
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static int
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do_position(char *cname, int argc, char *argv[])
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{
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struct changer_position cmd;
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int val;
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/*
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* On a position command, we expect the following:
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*
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* <to ET> <to EU> [inv]
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*
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* where ET == element type and EU == element unit.
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*/
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++argv; --argc;
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if (argc < 2) {
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warnx("%s: too few arguments", cname);
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goto usage;
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} else if (argc > 3) {
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warnx("%s: too many arguments", cname);
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goto usage;
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}
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bzero(&cmd, sizeof(cmd));
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/* <to ET> */
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cmd.cp_type = parse_element_type(*argv);
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++argv; --argc;
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/* <to EU> */
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cmd.cp_unit = parse_element_unit(*argv);
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++argv; --argc;
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/* Deal with optional command modifier. */
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if (argc) {
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val = parse_special(*argv);
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switch (val) {
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case SW_INVERT:
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cmd.cp_flags |= CP_INVERT;
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break;
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default:
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errx(1, "%s: inappropriate modifier `%s'",
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cname, *argv);
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/* NOTREACHED */
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}
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}
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/* Send command to changer. */
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if (ioctl(changer_fd, CHIOPOSITION, &cmd) == -1)
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err(1, "%s: CHIOPOSITION", changer_name);
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return (0);
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usage:
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fprintf(stderr, "usage: %s %s <to ET> <to EU> [inv]\n",
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__progname, cname);
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return (1);
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}
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static int
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do_params(char *cname, int argc, char *argv[])
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{
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struct changer_params data;
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/* No arguments to this command. */
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++argv; --argc;
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if (argc) {
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warnx("%s: no arguments expected", cname);
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goto usage;
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}
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/* Get params from changer and display them. */
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bzero(&data, sizeof(data));
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if (ioctl(changer_fd, CHIOGPARAMS, &data) == -1)
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err(1, "%s: CHIOGPARAMS", changer_name);
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printf("%s: %d slot%s, %d drive%s, %d picker%s",
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changer_name,
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data.cp_nslots, (data.cp_nslots > 1) ? "s" : "",
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data.cp_ndrives, (data.cp_ndrives > 1) ? "s" : "",
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data.cp_npickers, (data.cp_npickers > 1) ? "s" : "");
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if (data.cp_nportals)
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printf(", %d portal%s", data.cp_nportals,
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(data.cp_nportals > 1) ? "s" : "");
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printf("\n%s: current picker: %d\n", changer_name, data.cp_curpicker);
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return (0);
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usage:
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fprintf(stderr, "usage: %s %s\n", __progname, cname);
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return (1);
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}
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static int
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do_getpicker(char *cname, int argc, char *argv[])
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{
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int picker;
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/* No arguments to this command. */
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++argv; --argc;
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if (argc) {
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warnx("%s: no arguments expected", cname);
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goto usage;
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}
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/* Get current picker from changer and display it. */
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if (ioctl(changer_fd, CHIOGPICKER, &picker) == -1)
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err(1, "%s: CHIOGPICKER", changer_name);
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printf("%s: current picker: %d\n", changer_name, picker);
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return (0);
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usage:
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fprintf(stderr, "usage: %s %s\n", __progname, cname);
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return (1);
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}
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static int
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do_setpicker(char *cname, int argc, char *argv[])
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{
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int picker;
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++argv; --argc;
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if (argc < 1) {
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warnx("%s: too few arguments", cname);
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goto usage;
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} else if (argc > 1) {
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warnx("%s: too many arguments", cname);
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goto usage;
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}
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picker = parse_element_unit(*argv);
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/* Set the changer picker. */
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if (ioctl(changer_fd, CHIOSPICKER, &picker) == -1)
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err(1, "%s: CHIOSPICKER", changer_name);
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return (0);
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usage:
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fprintf(stderr, "usage: %s %s <picker>\n", __progname, cname);
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return (1);
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}
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static int
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do_status(char *cname, int argc, char *argv[])
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{
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struct changer_element_status_request cmd;
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struct changer_params data;
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int i, chet, schet, echet, c;
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char *description;
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size_t count;
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optreset = 1;
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optind = 1;
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while ((c = getopt(argc, argv, "SsvVa")) != -1) {
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switch (c) {
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case 's':
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sense = 1;
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break;
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case 'S':
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source = 1;
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break;
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case 'v':
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pvoltag = 1;
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break;
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case 'V':
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avoltag = 1;
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break;
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case 'a':
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pvoltag = avoltag = source = sense = 1;
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break;
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default:
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goto usage;
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}
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}
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argc -= optind;
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argv += optind;
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/*
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* On a status command, we expect the following:
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*
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* [<ET>]
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*
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* where ET == element type.
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*
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* If we get no arguments, we get the status of all
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* known element types.
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*/
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if (argc > 1) {
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warnx("%s: too many arguments", cname);
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goto usage;
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}
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/*
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* Get params from changer. Specifically, we need the element
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* counts.
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*/
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bzero(&data, sizeof(data));
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if (ioctl(changer_fd, CHIOGPARAMS, &data) == -1)
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err(1, "%s: CHIOGPARAMS", changer_name);
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if (argc)
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schet = echet = parse_element_type(*argv);
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else {
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schet = CHET_MT;
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echet = CHET_DT;
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}
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for (chet = schet; chet <= echet; ++chet) {
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switch (chet) {
|
|
case CHET_MT:
|
|
count = data.cp_npickers;
|
|
description = "picker";
|
|
break;
|
|
|
|
case CHET_ST:
|
|
count = data.cp_nslots;
|
|
description = "slot";
|
|
break;
|
|
|
|
case CHET_IE:
|
|
count = data.cp_nportals;
|
|
description = "portal";
|
|
break;
|
|
|
|
case CHET_DT:
|
|
count = data.cp_ndrives;
|
|
description = "drive";
|
|
break;
|
|
}
|
|
|
|
if (count == 0) {
|
|
if (argc == 0)
|
|
continue;
|
|
else {
|
|
printf("%s: no %s elements\n",
|
|
changer_name, description);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
bzero(&cmd, sizeof(cmd));
|
|
|
|
cmd.cesr_type = chet;
|
|
/* Allocate storage for the status info. */
|
|
cmd.cesr_data = calloc(count, sizeof(*cmd.cesr_data));
|
|
if ((cmd.cesr_data) == NULL)
|
|
errx(1, "can't allocate status storage");
|
|
if (avoltag || pvoltag)
|
|
cmd.cesr_flags |= CESR_VOLTAGS;
|
|
|
|
if (ioctl(changer_fd, CHIOGSTATUS, &cmd) == -1) {
|
|
free(cmd.cesr_data);
|
|
err(1, "%s: CHIOGSTATUS", changer_name);
|
|
}
|
|
|
|
/* Dump the status for each element of this type. */
|
|
for (i = 0; i < count; ++i) {
|
|
struct changer_element_status *ces =
|
|
&(cmd.cesr_data[i]);
|
|
printf("%s %d: %s", description, i,
|
|
bits_to_string(ces->ces_flags, CESTATUS_BITS));
|
|
if (sense)
|
|
printf(" sense: <0x%02x/0x%02x>",
|
|
ces->ces_sensecode,
|
|
ces->ces_sensequal);
|
|
if (pvoltag)
|
|
printf(" voltag: <%s:%d>",
|
|
ces->ces_pvoltag.cv_volid,
|
|
ces->ces_pvoltag.cv_serial);
|
|
if (avoltag)
|
|
printf(" avoltag: <%s:%d>",
|
|
ces->ces_avoltag.cv_volid,
|
|
ces->ces_avoltag.cv_serial);
|
|
if (source) {
|
|
if (ces->ces_flags & CESTATUS_ACCESS)
|
|
printf(" source: <%s %d>",
|
|
element_type_name(
|
|
ces->ces_source_type),
|
|
ces->ces_source_addr);
|
|
else
|
|
printf(" source: <>");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
free(cmd.cesr_data);
|
|
}
|
|
|
|
return (0);
|
|
|
|
usage:
|
|
fprintf(stderr, "usage: %s %s [<element type>]\n", __progname,
|
|
cname);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Check a drive unit as the source for a move or exchange
|
|
* operation. If the drive is not accessible, we attempt
|
|
* to unmount the tape in it before moving to avoid
|
|
* errors in "disconnected" type pickers where the drive
|
|
* is on a separate target from the changer.
|
|
*/
|
|
static void
|
|
check_source_drive(int unit)
|
|
{
|
|
struct mtop mtoffl = { MTOFFL, 1 };
|
|
struct changer_element_status_request cmd;
|
|
struct changer_element_status *ces;
|
|
struct changer_params data;
|
|
size_t count = 0;
|
|
int mtfd;
|
|
char *tapedev;
|
|
|
|
/*
|
|
* Get params from changer. Specifically, we need the element
|
|
* counts.
|
|
*/
|
|
bzero(&data, sizeof(data));
|
|
if (ioctl(changer_fd, CHIOGPARAMS, &data) == -1)
|
|
err(1, "%s: CHIOGPARAMS", changer_name);
|
|
|
|
count = data.cp_ndrives;
|
|
if (unit < 0 || unit >= count)
|
|
err(1, "%s: invalid drive: drive %d", changer_name, unit);
|
|
|
|
bzero(&cmd, sizeof(cmd));
|
|
cmd.cesr_type = CHET_DT;
|
|
/* Allocate storage for the status info. */
|
|
cmd.cesr_data = calloc(count, sizeof(*cmd.cesr_data));
|
|
if ((cmd.cesr_data) == NULL)
|
|
errx(1, "can't allocate status storage");
|
|
|
|
if (ioctl(changer_fd, CHIOGSTATUS, &cmd) == -1) {
|
|
free(cmd.cesr_data);
|
|
err(1, "%s: CHIOGSTATUS", changer_name);
|
|
}
|
|
ces = &(cmd.cesr_data[unit]);
|
|
|
|
if ((ces->ces_flags & CESTATUS_FULL) != CESTATUS_FULL)
|
|
err(1, "%s: drive %d is empty!", changer_name, unit);
|
|
|
|
if ((ces->ces_flags & CESTATUS_ACCESS) == CESTATUS_ACCESS)
|
|
return; /* changer thinks all is well - trust it */
|
|
|
|
/*
|
|
* Otherwise, drive is FULL, but not accessible.
|
|
* Try to make it accessible by doing an mt offline.
|
|
*/
|
|
tapedev = parse_tapedev(_PATH_CH_CONF, changer_name, unit);
|
|
mtfd = opendev(tapedev, O_RDONLY, 0, NULL);
|
|
if (mtfd == -1)
|
|
err(1, "%s drive %d (%s): open", changer_name, unit, tapedev);
|
|
if (ioctl(mtfd, MTIOCTOP, &mtoffl) == -1)
|
|
err(1, "%s drive %d (%s): rewoffl", changer_name, unit,
|
|
tapedev);
|
|
close(mtfd);
|
|
}
|
|
|
|
void
|
|
find_voltag(char *voltag, int *type, int *unit)
|
|
{
|
|
struct changer_element_status_request cmd;
|
|
struct changer_params data;
|
|
int i, chet, schet, echet, found;
|
|
size_t count = 0;
|
|
|
|
/*
|
|
* Get params from changer. Specifically, we need the element
|
|
* counts.
|
|
*/
|
|
bzero(&data, sizeof(data));
|
|
if (ioctl(changer_fd, CHIOGPARAMS, &data) == -1)
|
|
err(1, "%s: CHIOGPARAMS", changer_name);
|
|
|
|
found = 0;
|
|
schet = CHET_MT;
|
|
echet = CHET_DT;
|
|
|
|
/*
|
|
* For each type of element, iterate through each one until
|
|
* we find the correct volume id.
|
|
*/
|
|
for (chet = schet; chet <= echet; ++chet) {
|
|
switch (chet) {
|
|
case CHET_MT:
|
|
count = data.cp_npickers;
|
|
break;
|
|
case CHET_ST:
|
|
count = data.cp_nslots;
|
|
break;
|
|
case CHET_IE:
|
|
count = data.cp_nportals;
|
|
break;
|
|
case CHET_DT:
|
|
count = data.cp_ndrives;
|
|
break;
|
|
}
|
|
if (count == 0 || found)
|
|
continue;
|
|
|
|
bzero(&cmd, sizeof(cmd));
|
|
cmd.cesr_type = chet;
|
|
/* Allocate storage for the status info. */
|
|
cmd.cesr_data = calloc(count, sizeof(*cmd.cesr_data));
|
|
if ((cmd.cesr_data) == NULL)
|
|
errx(1, "can't allocate status storage");
|
|
cmd.cesr_flags |= CESR_VOLTAGS;
|
|
|
|
if (ioctl(changer_fd, CHIOGSTATUS, &cmd) == -1) {
|
|
free(cmd.cesr_data);
|
|
err(1, "%s: CHIOGSTATUS", changer_name);
|
|
}
|
|
|
|
/*
|
|
* look through each element to see if it has our desired
|
|
* volume tag.
|
|
*/
|
|
for (i = 0; i < count; ++i) {
|
|
struct changer_element_status *ces =
|
|
&(cmd.cesr_data[i]);
|
|
if ((ces->ces_flags & CESTATUS_FULL) != CESTATUS_FULL)
|
|
continue; /* no tape in drive */
|
|
if (strcasecmp(voltag, ces->ces_pvoltag.cv_volid)
|
|
== 0) {
|
|
*type = chet;
|
|
*unit = i;
|
|
found = 1;
|
|
free(cmd.cesr_data);
|
|
return;
|
|
}
|
|
}
|
|
free(cmd.cesr_data);
|
|
}
|
|
errx(1, "%s: unable to locate voltag: %s", changer_name, voltag);
|
|
}
|
|
|
|
|
|
static int
|
|
parse_element_type(char *cp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; elements[i].et_name != NULL; ++i)
|
|
if (strcmp(elements[i].et_name, cp) == 0)
|
|
return (elements[i].et_type);
|
|
|
|
errx(1, "invalid element type `%s'", cp);
|
|
}
|
|
|
|
static const char *
|
|
element_type_name(int et)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; elements[i].et_name != NULL; i++)
|
|
if (elements[i].et_type == et)
|
|
return elements[i].et_name;
|
|
|
|
return "unknown";
|
|
}
|
|
|
|
static int
|
|
parse_element_unit(char *cp)
|
|
{
|
|
int i;
|
|
char *p;
|
|
|
|
i = (int)strtol(cp, &p, 10);
|
|
if ((i < 0) || (*p != '\0'))
|
|
errx(1, "invalid unit number `%s'", cp);
|
|
|
|
return (i);
|
|
}
|
|
|
|
static int
|
|
parse_special(char *cp)
|
|
{
|
|
int val;
|
|
|
|
val = is_special(cp);
|
|
if (val)
|
|
return (val);
|
|
|
|
errx(1, "invalid modifier `%s'", cp);
|
|
}
|
|
|
|
static int
|
|
is_special(char *cp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; specials[i].sw_name != NULL; ++i)
|
|
if (strcmp(specials[i].sw_name, cp) == 0)
|
|
return (specials[i].sw_value);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static char *
|
|
bits_to_string(int v, const char *cp)
|
|
{
|
|
const char *np;
|
|
char f, sep, *bp;
|
|
static char buf[128];
|
|
|
|
bp = buf;
|
|
bzero(buf, sizeof(buf));
|
|
|
|
for (sep = '<'; (f = *cp++) != 0; cp = np) {
|
|
for (np = cp; *np >= ' ';)
|
|
np++;
|
|
if ((v & (1 << (f - 1))) == 0)
|
|
continue;
|
|
(void)snprintf(bp, sizeof(buf) - (bp - &buf[0]),
|
|
"%c%.*s", sep, (int)(np - cp), cp);
|
|
bp += strlen(bp);
|
|
sep = ',';
|
|
}
|
|
if (sep != '<')
|
|
*bp = '>';
|
|
|
|
return (buf);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: %s [-f changer] command [arg ...]\n",
|
|
__progname);
|
|
exit(1);
|
|
}
|