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

   1 /*      $NetBSD: ex_preserve.c,v 1.3 2014/01/26 21:43:45 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 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 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 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: ex_preserve.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24
  25 #include <bitstring.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include "../common/common.h"
  32
  33 /*
  34  * ex_preserve -- :pre[serve]
  35  *      Push the file to recovery.
  36  *
  37  * PUBLIC: int ex_preserve __P((SCR *, EXCMD *));
  38  */
  39 int
  40 ex_preserve(SCR *sp, EXCMD *cmdp)
  41 {
  42         db_recno_t lno;
  43
  44         NEEDFILE(sp, cmdp);
  45
  46         if (!F_ISSET(sp->ep, F_RCV_ON)) {
  47                 msgq(sp, M_ERR, "142|Preservation of this file not possible");
  48                 return (1);
  49         }
  50
  51         /* If recovery not initialized, do so. */
  52         if (F_ISSET(sp->ep, F_FIRSTMODIFY) && rcv_init(sp))
  53                 return (1);
  54
  55         /* Force the file to be read in, in case it hasn't yet. */
  56         if (db_last(sp, &lno))
  57                 return (1);
  58
  59         /* Sync to disk. */
  60         if (rcv_sync(sp, RCV_SNAPSHOT))
  61                 return (1);
  62
  63         msgq(sp, M_INFO, "143|File preserved");
  64         return (0);
  65 }
  66
  67 /*
  68  * ex_recover -- :rec[over][!] file
  69  *      Recover the file.
  70  *
  71  * PUBLIC: int ex_recover __P((SCR *, EXCMD *));
  72  */
  73 int
  74 ex_recover(SCR *sp, EXCMD *cmdp)
  75 {
  76         ARGS *ap;
  77         FREF *frp;
  78         const char *np;
  79         size_t nlen;
  80
  81         ap = cmdp->argv[0];
  82
  83         /* Set the alternate file name. */
  84         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  85         set_alt_name(sp, np);
  86
  87         /*
  88          * Check for modifications.  Autowrite did not historically
  89          * affect :recover.
  90          */
  91         if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
  92                 return (1);
  93
  94         /* Get a file structure for the file. */
  95         INT2CHAR(sp, ap->bp, ap->len+1, np, nlen);
  96         if ((frp = file_add(sp, np)) == NULL)
  97                 return (1);
  98
  99         /* Set the recover bit. */
 100         F_SET(frp, FR_RECOVER);
 101
 102         /* Switch files. */
 103         if (file_init(sp, frp, NULL, FS_SETALT |
 104             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 105                 return (1);
 106
 107         F_SET(sp, SC_FSWITCH);
 108         return (0);
 109 }