sbin/restore/restore.h

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)restore.h   8.3 (Berkeley) 9/13/94
  39  */
  40
  41 /*
  42  * Flags
  43  */
  44 extern int      cvtflag;        /* convert from old to new tape format */
  45 extern int      bflag;          /* set input block size */
  46 extern int      dflag;          /* print out debugging info */
  47 extern int      hflag;          /* restore heirarchies */
  48 extern int      mflag;          /* restore by name instead of inode number */
  49 extern int      Nflag;          /* do not write the disk */
  50 extern int      uflag;          /* unlink symlink targets */
  51 extern int      vflag;          /* print out actions taken */
  52 extern int      yflag;          /* always try to recover from tape errors */
  53 /*
  54  * Global variables
  55  */
  56 extern char     *dumpmap;       /* map of inodes on this dump tape */
  57 extern char     *usedinomap;    /* map of inodes that are in use on this fs */
  58 extern ino_t    maxino;         /* highest numbered inode in this file system */
  59 extern long     dumpnum;        /* location of the dump on this tape */
  60 extern long     volno;          /* current volume being read */
  61 extern long     ntrec;          /* number of TP_BSIZE records per tape block */
  62 extern time_t   dumptime;       /* time that this dump begins */
  63 extern time_t   dumpdate;       /* time that this dump was made */
  64 extern char     command;        /* opration being performed */
  65 extern FILE     *terminal;      /* file descriptor for the terminal input */
  66 extern int      oldinofmt;      /* reading tape with old format inodes */
  67 extern int      Bcvt;           /* need byte swapping on inodes and dirs */
  68
  69 /*
  70  * Each file in the file system is described by one of these entries
  71  */
  72 struct entry {
  73         char    *e_name;                /* the current name of this entry */
  74         u_char  e_namlen;               /* length of this name */
  75         char    e_type;                 /* type of this entry, see below */
  76         short   e_flags;                /* status flags, see below */
  77         ino_t   e_ino;                  /* inode number in previous file sys */
  78         long    e_index;                /* unique index (for dumpped table) */
  79         struct  entry *e_parent;        /* pointer to parent directory (..) */
  80         struct  entry *e_sibling;       /* next element in this directory (.) */
  81         struct  entry *e_links;         /* hard links to this inode */
  82         struct  entry *e_entries;       /* for directories, their entries */
  83         struct  entry *e_next;          /* hash chain list */
  84 };
  85 /* types */
  86 #define LEAF 1                  /* non-directory entry */
  87 #define NODE 2                  /* directory entry */
  88 #define LINK 4                  /* synthesized type, stripped by addentry */
  89 /* flags */
  90 #define EXTRACT         0x0001  /* entry is to be replaced from the tape */
  91 #define NEW             0x0002  /* a new entry to be extracted */
  92 #define KEEP            0x0004  /* entry is not to change */
  93 #define REMOVED         0x0010  /* entry has been removed */
  94 #define TMPNAME         0x0020  /* entry has been given a temporary name */
  95 #define EXISTED         0x0040  /* directory already existed during extract */
  96
  97 /*
  98  * Constants associated with entry structs
  99  */
 100 #define HARDLINK        1
 101 #define SYMLINK         2
 102 #define TMPHDR          "RSTTMP"
 103
 104 /*
 105  * The entry describes the next file available on the tape
 106  */
 107 struct context {
 108         char    *name;          /* name of file */
 109         ino_t   ino;            /* inumber of file */
 110         struct  dinode *dip;    /* pointer to inode */
 111         char    action;         /* action being taken on this file */
 112 } curfile;
 113 /* actions */
 114 #define USING   1       /* extracting from the tape */
 115 #define SKIP    2       /* skipping */
 116 #define UNKNOWN 3       /* disposition or starting point is unknown */
 117
 118 /*
 119  * Definitions for library routines operating on directories.
 120  */
 121 typedef struct rstdirdesc RST_DIR;
 122
 123 /*
 124  * Flags to setdirmodes.
 125  */
 126 #define FORCE   0x0001
 127
 128 /*
 129  * Useful macros
 130  */
 131 #define TSTINO(ino, map) \
 132         (map[(u_int)((ino) - 1) / NBBY] &  (1 << ((u_int)((ino) - 1) % NBBY)))
 133 #define SETINO(ino, map) \
 134         map[(u_int)((ino) - 1) / NBBY] |=  1 << ((u_int)((ino) - 1) % NBBY)
 135
 136 #define dprintf         if (dflag) fprintf
 137 #define vprintf         if (vflag) fprintf
 138
 139 #define GOOD 1
 140 #define FAIL 0