2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
3 * Copyright (c) 1991-1998 University of Maryland at College Park
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of U.M. not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. U.M. makes no representations about the
13 * suitability of this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
16 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
18 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Authors: the Amanda Development Team. Its members are listed in a
24 * file named AUTHORS, in the root directory of this distribution.
27 * $Id: changer.h,v 1.12 2005/12/21 19:07:50 paddy_s Exp $
29 * interface routines for tape changers
33 extern int changer_debug;
34 extern char *changer_resultstr;
36 int changer_init P((void));
37 int changer_reset P((char **slotstr));
38 int changer_clean P((char **slotstr));
39 int changer_eject P((char **slotstr));
40 int changer_label P((char *slotsp, char *labelstr));
41 int changer_info P((int *nslotsp, char **curslotstr, int *backwards));
42 int changer_query P((int *nslotsp, char **curslotstr, int *backwards,
44 int changer_search P((char *searchlabel, char **outslotstr, char **devicename));
45 int changer_loadslot P((char *inslotstr, char **outslotstr, char **devicename));
46 void changer_current P((void *user_data,
47 int (*user_init)(void *user_data,
48 int rc, int nslots, int backwards,
50 int (*user_slot)(void *user_data,
51 int rc, char *slotstr, char *device)));
54 /* USAGE: changer_find(user_data, init_fxn, slot_fxn, searchlabel)
56 * Searches the changer. If searchlabel is not NULL, and the changer has
57 * barcode support, then changer_find will load that tape
58 * first. Otherwise, changer_find will search through the tape drive
59 * one by one until user_slot() returns nonzero.
61 * Parameters: user_data: A pointer which is not interpreted by
62 * changer_find, but passed back to the
63 * callback functions user_data and user_slot.
64 * You can use this structure instead of
66 * user_init: This function is called right away. Its
68 * user_data: (as above)
69 * rc: The results of the changer -info
71 * nslots: The number of slots in the changer.
72 * backwards: Whether this changer can go
73 * backwards or not. Some changers
74 * can only search in one direction,
75 * and then the operator must reload
77 * searchable: Whether this changer has a
78 * barcode reader or similar device.
79 * user_slot: This function is called for every slot.
80 * Searching stops when it returns
81 * nonzero. Arguments are:
82 * user_data: (as above)
83 * rc: The results of the changer -slot
85 * slotstr: The slot which was loaded
86 * device: The tape device to use to read this slot.
91 void changer_find P((void *user_data,
92 int (*user_init)(void *user_data, int rc,
93 int nslots, int backwards,
95 int (*user_slot)(void *user_data, int rc,
96 char *slotstr, char *device),