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 10.14 2000/07/14 14:29:20 skimo Exp $ (Berkeley) $Date: 2000/07/14 14:29:20 $";
  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(sp, cmdp)
  35         SCR *sp;
  36         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(sp, cmdp)
  71         SCR *sp;
  72         EXCMD *cmdp;
  73 {
  74         ARGS *ap;
  75         FREF *frp;
  76         char *np;
  77         size_t nlen;
  78
  79         ap = cmdp->argv[0];
  80
  81         /* Set the alternate file name. */
  82         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  83         set_alt_name(sp, np);
  84
  85         /*
  86          * Check for modifications.  Autowrite did not historically
  87          * affect :recover.
  88          */
  89         if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
  90                 return (1);
  91
  92         /* Get a file structure for the file. */
  93         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  94         if ((frp = file_add(sp, np)) == NULL)
  95                 return (1);
  96
  97         /* Set the recover bit. */
  98         F_SET(frp, FR_RECOVER);
  99
 100         /* Switch files. */
 101         if (file_init(sp, frp, NULL, FS_SETALT |
 102             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 103                 return (1);
 104
 105         F_SET(sp, SC_FSWITCH);
 106         return (0);
 107 }