ex/ex_preserve.c

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