restore/restore.h

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <pop@cybercable.fr>, 1999
   6  *
   7  *      $Id: restore.h,v 1.6 1999/11/22 21:39:42 tiniou Exp $
   8  */
   9
  10 /*
  11  * Copyright (c) 1983, 1993
  12  *      The Regents of the University of California.  All rights reserved.
  13  * (c) UNIX System Laboratories, Inc.
  14  * All or some portions of this file are derived from material licensed
  15  * to the University of California by American Telephone and Telegraph
  16  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  17  * the permission of UNIX System Laboratories, Inc.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions
  21  * are met:
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  * 2. Redistributions in binary form must reproduce the above copyright
  25  *    notice, this list of conditions and the following disclaimer in the
  26  *    documentation and/or other materials provided with the distribution.
  27  * 3. All advertising materials mentioning features or use of this software
  28  *    must display the following acknowledgement:
  29  *      This product includes software developed by the University of
  30  *      California, Berkeley and its contributors.
  31  * 4. Neither the name of the University nor the names of its contributors
  32  *    may be used to endorse or promote products derived from this software
  33  *    without specific prior written permission.
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  36  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  38  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  39  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  40  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  41  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  42  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  43  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  44  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  45  * SUCH DAMAGE.
  46  */
  47
  48 /*
  49  * Flags
  50  */
  51 extern int      cvtflag;        /* convert from old to new tape format */
  52 extern int      bflag;          /* set input block size */
  53 extern int      dflag;          /* print out debugging info */
  54 extern int      hflag;          /* restore heirarchies */
  55 extern int      mflag;          /* restore by name instead of inode number */
  56 extern int      Mflag;          /* multi-volume restore */
  57 extern int      Nflag;          /* do not write the disk */
  58 extern int      uflag;          /* unlink symlink targets */
  59 extern int      vflag;          /* print out actions taken */
  60 extern int      yflag;          /* always try to recover from tape errors */
  61 /*
  62  * Global variables
  63  */
  64 extern char     *dumpmap;       /* map of inodes on this dump tape */
  65 extern char     *usedinomap;    /* map of inodes that are in use on this fs */
  66 extern ino_t    maxino;         /* highest numbered inode in this file system */
  67 extern long     dumpnum;        /* location of the dump on this tape */
  68 extern long     volno;          /* current volume being read */
  69 extern long     ntrec;          /* number of TP_BSIZE records per tape block */
  70 extern time_t   dumptime;       /* time that this dump begins */
  71 extern time_t   dumpdate;       /* time that this dump was made */
  72 extern char     command;        /* opration being performed */
  73 extern FILE     *terminal;      /* file descriptor for the terminal input */
  74 extern char     *tmpdir;        /* name of temp directory */
  75 extern int      oldinofmt;      /* reading tape with old format inodes */
  76 extern int      Bcvt;           /* need byte swapping on inodes and dirs */
  77 extern int      compare_ignore_not_found;
  78                                 /* used to compare incremental dumps, */
  79                                 /* so messages about "not found" files */
  80                                 /* isn't seen. */
  81 extern char     *filesys;       /* name of dumped filesystem */
  82
  83 /*
  84  * Each file in the file system is described by one of these entries
  85  */
  86 struct entry {
  87         char    *e_name;                /* the current name of this entry */
  88         u_char  e_namlen;               /* length of this name */
  89         char    e_type;                 /* type of this entry, see below */
  90         short   e_flags;                /* status flags, see below */
  91         ino_t   e_ino;                  /* inode number in previous file sys */
  92         long    e_index;                /* unique index (for dumpped table) */
  93         struct  entry *e_parent;        /* pointer to parent directory (..) */
  94         struct  entry *e_sibling;       /* next element in this directory (.) */
  95         struct  entry *e_links;         /* hard links to this inode */
  96         struct  entry *e_entries;       /* for directories, their entries */
  97         struct  entry *e_next;          /* hash chain list */
  98 };
  99 /* types */
 100 #define LEAF 1                  /* non-directory entry */
 101 #define NODE 2                  /* directory entry */
 102 #define LINK 4                  /* synthesized type, stripped by addentry */
 103 /* flags */
 104 #define EXTRACT         0x0001  /* entry is to be replaced from the tape */
 105 #define NEW             0x0002  /* a new entry to be extracted */
 106 #define KEEP            0x0004  /* entry is not to change */
 107 #define REMOVED         0x0010  /* entry has been removed */
 108 #define TMPNAME         0x0020  /* entry has been given a temporary name */
 109 #define EXISTED         0x0040  /* directory already existed during extract */
 110
 111 /*
 112  * Constants associated with entry structs
 113  */
 114 #define HARDLINK        1
 115 #define SYMLINK         2
 116 #define TMPHDR          "RSTTMP"
 117
 118 /*
 119  * The entry describes the next file available on the tape
 120  */
 121 struct context {
 122         char    *name;          /* name of file */
 123         ino_t   ino;            /* inumber of file */
 124 #ifdef  __linux__
 125         struct  new_bsd_inode *dip;     /* pointer to inode */
 126 #else
 127         struct  dinode *dip;    /* pointer to inode */
 128 #endif
 129         char    action;         /* action being taken on this file */
 130 } curfile;
 131 /* actions */
 132 #define USING   1       /* extracting from the tape */
 133 #define SKIP    2       /* skipping */
 134 #define UNKNOWN 3       /* disposition or starting point is unknown */
 135
 136 /*
 137  * Definitions for library routines operating on directories.
 138  */
 139 typedef struct rstdirdesc RST_DIR;
 140
 141 /*
 142  * Flags to setdirmodes.
 143  */
 144 #define FORCE   0x0001
 145
 146 /*
 147  * Useful macros
 148  */
 149 #define TSTINO(ino, map) \
 150         (map[(u_int)((ino) - 1) / NBBY] &  (1 << ((u_int)((ino) - 1) % NBBY)))
 151 #define SETINO(ino, map) \
 152         map[(u_int)((ino) - 1) / NBBY] |=  1 << ((u_int)((ino) - 1) % NBBY)
 153
 154 #define Dprintf         if (dflag) fprintf
 155 #define Vprintf         if (vflag) fprintf
 156
 157 #define GOOD 1
 158 #define FAIL 0