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/* $OpenBSD: ex_edit.c,v 1.5 2009/10/27 23:59:47 deraadt Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../common/common.h"
#include "../vi/vi.h"
static int ex_N_edit(SCR *, EXCMD *, FREF *, int);
/*
* ex_edit -- :e[dit][!] [+cmd] [file]
* :ex[!] [+cmd] [file]
* :vi[sual][!] [+cmd] [file]
*
* Edit a file; if none specified, re-edit the current file. The third
* 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. This seems unreasonable, so we support it
* regardless.
*
* PUBLIC: int ex_edit(SCR *, EXCMD *);
*/
int
ex_edit(sp, cmdp)
SCR *sp;
EXCMD *cmdp;
{
FREF *frp;
int attach, setalt;
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
* (or wasn't editing any file), create another one. The
* reason for not reusing temporary files is that there is
* special exit processing of them, and reuse is tricky.
*/
frp = sp->frp;
if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) {
if ((frp = file_add(sp, NULL)) == NULL)
return (1);
attach = 0;
} else
attach = 1;
setalt = 0;
break;
case 1:
if ((frp = file_add(sp, cmdp->argv[0]->bp)) == NULL)
return (1);
attach = 0;
setalt = 1;
set_alt_name(sp, cmdp->argv[0]->bp);
break;
default:
abort();
}
if (F_ISSET(cmdp, E_NEWSCREEN))
return (ex_N_edit(sp, cmdp, frp, attach));
/*
* Check for modifications.
*
* !!!
* Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
*/
if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
return (1);
/* Switch files. */
if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) |
(FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
return (1);
F_SET(sp, SC_FSWITCH);
return (0);
}
/*
* ex_N_edit --
* New screen version of ex_edit.
*/
static int
ex_N_edit(sp, cmdp, frp, attach)
SCR *sp;
EXCMD *cmdp;
FREF *frp;
int attach;
{
SCR *new;
/* Get a new screen. */
if (screen_init(sp->gp, sp, &new))
return (1);
if (vs_split(sp, new, 0)) {
(void)screen_end(new);
return (1);
}
/* Get a backing file. */
if (attach) {
/* Copy file state, keep the screen and cursor the same. */
new->ep = sp->ep;
++new->ep->refcnt;
new->frp = frp;
new->frp->flags = sp->frp->flags;
new->lno = sp->lno;
new->cno = sp->cno;
} else if (file_init(new, frp, NULL,
(FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
(void)vs_discard(new, NULL);
(void)screen_end(new);
return (1);
}
/* Create the argument list. */
new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name);
/* Set up the switch. */
sp->nextdisp = new;
F_SET(sp, SC_SSWITCH);
return (0);
}
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