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1.1 root 1: /* (-lgl
2: * COHERENT Version 3.0
3: * Copyright (c) 1982, 1993 by Mark Williams Company.
4: * All rights reserved. May not be copied without permission.
5: -lgl) */
6: /*
7: * Dump tapes.
8: * A dump tape begins with a header
9: * record. This contains the attributes of the
10: * tape.
11: * The remainder of the tape is filled with
12: * arrays of dumpdata records. The map comes first,
13: * then all the directories, then all the files.
14: */
15: #ifndef __DUMPTAPE_H__
16: #define __DUMPTAPE_H__
17:
18: #include <sys/types.h>
19: #include <sys/ino.h>
20:
21: /*
22: * Be warned! This header uses several magic numbers related to raw filesystem
23: * structure that are not portable. Since raw filesystem structure is used,
24: * this command will /not/ run on any filesystems other than the old-style
25: * Coherent filesystem.
26: */
27:
28: #if ! DIRSIZ
29: # define DIRSIZ 14
30: #endif
31: #if ! __BUFSIZ
32: # define __BUFSIZ 512
33: #endif
34:
35: /*
36: * Dump tape header.
37: * All entries are in cannonical
38: * format on the tape.
39: */
40: struct dumpheader
41: {
42: int dh_magic; /* Magic number */
43: ino_t dh_nino; /* # of inodes on file system */
44: time_t dh_bdate; /* Date at beginning of dump */
45: time_t dh_ddate; /* Dump since date */
46: int dh_level; /* Dump level */
47: int dh_reel; /* Reel number in dump */
48: fsize_t dh_nbyte; /* Length of disc */
49: int dh_blocking; /* Blocking factor */
50: char dh_dev[DIRSIZ]; /* Name of dumped device */
51: char dh_fname[6]; /* File system name */
52: char dh_fpack[6]; /* File system pack name */
53: int dh_checksum; /* Byte checksum */
54: };
55:
56: #define DH_MAG 0123456 /* Magic number */
57:
58: /*
59: * Dump data blocks.
60: * These are all a big union.
61: * They are packed into much larger
62: * blocks on the tape.
63: */
64: union dumpdata
65: {
66: struct {
67: int dd_type; /* Type = DD_EOT */
68: } dd_st1;
69:
70: struct {
71: int dd_type; /* Type = DD_DATA */
72: ino_t dd_ino; /* Inode number */
73: daddr_t dd_block; /* Block number in file */
74: int dd_size; /* Bytes used in this block */
75: char dd_data[__BUFSIZ];/* Data */
76: } dd_st2;
77:
78: struct {
79: int dd_type; /* Type = DD_INO */
80: ino_t dd_ino; /* Inode number */
81: struct dinode dd_dinode; /* On disc inode */
82: } dd_st3;
83:
84: struct {
85: int dd_type; /* Type = DD_MAP */
86: ino_t dd_ino; /* Base inode of this map block */
87: int dd_nmap; /* # of map entries */
88: char dd_map[__BUFSIZ]; /* Some map */
89: } dd_st4;
90: };
91:
92: #define DD_EOT 0 /* End of dump */
93: #define DD_INO 1 /* Inode */
94: #define DD_DATA 2 /* Data block */
95: #define DD_MAP 3 /* Map */
96:
97: #define DD_BUSY 01 /* Inode in use */
98: #define DD_DUMP 02 /* Inode dumped */
99: #define DD_DIR 04 /* Inode is a directory */
100: #define DD_DEJA 010 /* Already seen flag (dump) */
101: #define DD_HERE (DD_BUSY|DD_DUMP) /* On the tape */
102:
103: /*
104: * This structure is used
105: * to hold the dump dates in the
106: * file `/etc/ddate'.
107: */
108: struct idates {
109: char id_name[DIRSIZ]; /* Device name */
110: int id_incno; /* Level */
111: time_t id_ddate; /* The date of the dump */
112: };
113:
114: #define DDATE "/etc/ddate" /* Date file name */
115: #define DTAPE "/dev/dump" /* Default dump tape */
116: #define DFSYS "" /* No default file system */
117:
118: #endif /* ! defined (__DUMPTAPE_H__) */
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