dist/nvi/ex/ex_preserve.c

   1 /*      $NetBSD: ex_preserve.c,v 1.1.1.2 2008/05/18 14:31:09 aymeric Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 static const char sccsid[] = "Id: ex_preserve.c,v 10.15 2001/06/25 15:19:18 skimo Exp (Berkeley) Date: 2001/06/25 15:19:18";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20
  21 #include <bitstring.h>
  22 #include <errno.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "../common/common.h"
  28
  29 /*
  30  * ex_preserve -- :pre[serve]
  31  *      Push the file to recovery.
  32  *
  33  * PUBLIC: int ex_preserve __P((SCR *, EXCMD *));
  34  */
  35 int
  36 ex_preserve(SCR *sp, EXCMD *cmdp)
  37 {
  38         db_recno_t lno;
  39
  40         NEEDFILE(sp, cmdp);
  41
  42         if (!F_ISSET(sp->ep, F_RCV_ON)) {
  43                 msgq(sp, M_ERR, "142|Preservation of this file not possible");
  44                 return (1);
  45         }
  46
  47         /* If recovery not initialized, do so. */
  48         if (F_ISSET(sp->ep, F_FIRSTMODIFY) && rcv_init(sp))
  49                 return (1);
  50
  51         /* Force the file to be read in, in case it hasn't yet. */
  52         if (db_last(sp, &lno))
  53                 return (1);
  54
  55         /* Sync to disk. */
  56         if (rcv_sync(sp, RCV_SNAPSHOT))
  57                 return (1);
  58
  59         msgq(sp, M_INFO, "143|File preserved");
  60         return (0);
  61 }
  62
  63 /*
  64  * ex_recover -- :rec[over][!] file
  65  *      Recover the file.
  66  *
  67  * PUBLIC: int ex_recover __P((SCR *, EXCMD *));
  68  */
  69 int
  70 ex_recover(SCR *sp, EXCMD *cmdp)
  71 {
  72         ARGS *ap;
  73         FREF *frp;
  74         const char *np;
  75         size_t nlen;
  76
  77         ap = cmdp->argv[0];
  78
  79         /* Set the alternate file name. */
  80         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  81         set_alt_name(sp, np);
  82
  83         /*
  84          * Check for modifications.  Autowrite did not historically
  85          * affect :recover.
  86          */
  87         if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
  88                 return (1);
  89
  90         /* Get a file structure for the file. */
  91         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  92         if ((frp = file_add(sp, np)) == NULL)
  93                 return (1);
  94
  95         /* Set the recover bit. */
  96         F_SET(frp, FR_RECOVER);
  97
  98         /* Switch files. */
  99         if (file_init(sp, frp, NULL, FS_SETALT |
 100             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 101                 return (1);
 102
 103         F_SET(sp, SC_FSWITCH);
 104         return (0);
 105 }