external/bsd/nvi/dist/ex/ex_preserve.c

   1 /*      $NetBSD: ex_preserve.c,v 1.2 2013/11/22 15:52:05 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #ifndef lint
  14 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 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19
  20 #include <bitstring.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 #include "../common/common.h"
  27
  28 /*
  29  * ex_preserve -- :pre[serve]
  30  *      Push the file to recovery.
  31  *
  32  * PUBLIC: int ex_preserve __P((SCR *, EXCMD *));
  33  */
  34 int
  35 ex_preserve(SCR *sp, EXCMD *cmdp)
  36 {
  37         db_recno_t lno;
  38
  39         NEEDFILE(sp, cmdp);
  40
  41         if (!F_ISSET(sp->ep, F_RCV_ON)) {
  42                 msgq(sp, M_ERR, "142|Preservation of this file not possible");
  43                 return (1);
  44         }
  45
  46         /* If recovery not initialized, do so. */
  47         if (F_ISSET(sp->ep, F_FIRSTMODIFY) && rcv_init(sp))
  48                 return (1);
  49
  50         /* Force the file to be read in, in case it hasn't yet. */
  51         if (db_last(sp, &lno))
  52                 return (1);
  53
  54         /* Sync to disk. */
  55         if (rcv_sync(sp, RCV_SNAPSHOT))
  56                 return (1);
  57
  58         msgq(sp, M_INFO, "143|File preserved");
  59         return (0);
  60 }
  61
  62 /*
  63  * ex_recover -- :rec[over][!] file
  64  *      Recover the file.
  65  *
  66  * PUBLIC: int ex_recover __P((SCR *, EXCMD *));
  67  */
  68 int
  69 ex_recover(SCR *sp, EXCMD *cmdp)
  70 {
  71         ARGS *ap;
  72         FREF *frp;
  73         const char *np;
  74         size_t nlen;
  75
  76         ap = cmdp->argv[0];
  77
  78         /* Set the alternate file name. */
  79         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  80         set_alt_name(sp, np);
  81
  82         /*
  83          * Check for modifications.  Autowrite did not historically
  84          * affect :recover.
  85          */
  86         if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
  87                 return (1);
  88
  89         /* Get a file structure for the file. */
  90         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  91         if ((frp = file_add(sp, np)) == NULL)
  92                 return (1);
  93
  94         /* Set the recover bit. */
  95         F_SET(frp, FR_RECOVER);
  96
  97         /* Switch files. */
  98         if (file_init(sp, frp, NULL, FS_SETALT |
  99             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 100                 return (1);
 101
 102         F_SET(sp, SC_FSWITCH);
 103         return (0);
 104 }