NetBSD/usr.bin/vi/ex/ex_edit.c

126 lines
3.8 KiB
C

/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)ex_edit.c 8.15 (Berkeley) 3/8/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include "compat.h"
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "excmd.h"
/*
* ex_edit -- :e[dit][!] [+cmd] [file]
* :vi[sual][!] [+cmd] [file]
*
* Edit a file; if none specified, re-edit the current file. The second
* form of the command can only be executed while in vi mode. See the
* hack in ex.c:ex_cmd().
*
* !!!
* Historic vi didn't permit the '+' command form without specifying
* a file name as well.
*/
int
ex_edit(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
ARGS *ap;
FREF *frp;
frp = sp->frp;
switch (cmdp->argc) {
case 0:
/*
* If the name has been changed, we edit that file, not the
* original name. If the user was editing a temporary file,
* create another one. The reason for this is that we do
* special exit processing of temporary files, and reusing
* them is tricky.
*/
if (frp->cname != NULL) {
if ((frp = file_add(sp, frp, frp->cname, 1)) == NULL)
return (1);
set_alt_name(sp, sp->frp->cname);
} else if (frp->name == NULL)
if ((frp = file_add(sp, frp, NULL, 1)) == NULL)
return (1);
break;
case 1:
ap = cmdp->argv[0];
if ((frp = file_add(sp, sp->frp, ap->bp, 1)) == NULL)
return (1);
set_alt_name(sp, ap->bp);
break;
default:
abort();
}
/*
* Check for modifications.
*
* !!!
* Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
*/
if (F_ISSET(ep, F_MODIFIED) &&
ep->refcnt <= 1 && !F_ISSET(cmdp, E_FORCE)) {
msgq(sp, M_ERR,
"Modified since last write; write or use ! to override.");
return (1);
}
/* Switch files. */
if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
return (1);
F_SET(sp, S_FSWITCH);
return (0);
}