129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)ex_preserve.c 8.14 (Berkeley) 8/17/94";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <errno.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <termios.h>
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#include "compat.h"
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#include <db.h>
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#include <regex.h>
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#include "vi.h"
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#include "excmd.h"
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/*
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* ex_preserve -- :pre[serve]
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* Push the file to recovery.
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*/
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int
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ex_preserve(sp, ep, cmdp)
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SCR *sp;
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EXF *ep;
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EXCMDARG *cmdp;
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{
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recno_t lno;
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if (!F_ISSET(ep, F_RCV_ON)) {
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msgq(sp, M_ERR, "Preservation of this file not possible");
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return (1);
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}
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/* If recovery not initialized, do so. */
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if (F_ISSET(ep, F_FIRSTMODIFY) && rcv_init(sp, ep))
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return (1);
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/* Force the file to be read in, in case it hasn't yet. */
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if (file_lline(sp, ep, &lno))
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return (1);
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/* Sync to disk. */
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if (rcv_sync(sp, ep, RCV_SNAPSHOT))
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return (1);
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msgq(sp, M_INFO, "File preserved");
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return (0);
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}
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/*
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* ex_recover -- :rec[over][!] file
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*
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* Recover the file.
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*/
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int
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ex_recover(sp, ep, cmdp)
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SCR *sp;
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EXF *ep;
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EXCMDARG *cmdp;
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{
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ARGS *ap;
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FREF *frp;
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ap = cmdp->argv[0];
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/* Set the alternate file name. */
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set_alt_name(sp, ap->bp);
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/*
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* Check for modifications. Autowrite did not historically
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* affect :recover.
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*/
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if (file_m2(sp, ep, F_ISSET(cmdp, E_FORCE)))
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return (1);
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/* Get a file structure for the file. */
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if ((frp = file_add(sp, ap->bp)) == NULL)
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return (1);
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/* Set the recover bit. */
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F_SET(frp, FR_RECOVER);
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/* Switch files. */
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if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
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return (1);
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F_SET(sp, S_FSWITCH);
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return (0);
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}
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