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

308 lines
7.4 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_write.c 8.27 (Berkeley) 3/23/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "compat.h"
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "excmd.h"
enum which {WQ, WRITE, XIT};
static int exwr __P((SCR *, EXF *, EXCMDARG *, enum which));
/*
* ex_wq -- :wq[!] [>>] [file]
* Write to a file.
*/
int
ex_wq(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
int force;
if (exwr(sp, ep, cmdp, WQ))
return (1);
force = F_ISSET(cmdp, E_FORCE);
if (!force && ep->refcnt <= 1 && file_unedited(sp) != NULL) {
msgq(sp, M_ERR,
"More files to edit; use \":n\" to go to the next file");
return (1);
}
F_SET(sp, force ? S_EXIT_FORCE : S_EXIT);
return (0);
}
/*
* ex_write -- :write[!] [>>] [file]
* :write [!] [cmd]
* Write to a file.
*/
int
ex_write(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
return (exwr(sp, ep, cmdp, WRITE));
}
/*
* ex_xit -- :x[it]! [file]
*
* Write out any modifications and quit.
*/
int
ex_xit(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
int force;
if (F_ISSET((ep), F_MODIFIED) && exwr(sp, ep, cmdp, XIT))
return (1);
force = F_ISSET(cmdp, E_FORCE);
if (!force && ep->refcnt <= 1 && file_unedited(sp) != NULL) {
msgq(sp, M_ERR,
"More files to edit; use \":n\" to go to the next file");
return (1);
}
F_SET(sp, force ? S_EXIT_FORCE : S_EXIT);
return (0);
}
/*
* exwr --
* The guts of the ex write commands.
*/
static int
exwr(sp, ep, cmdp, cmd)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
enum which cmd;
{
EX_PRIVATE *exp;
MARK rm;
int flags;
char *name, *p;
/* All write commands can have an associated '!'. */
LF_INIT(FS_POSSIBLE);
if (F_ISSET(cmdp, E_FORCE))
LF_SET(FS_FORCE);
/* Skip any leading whitespace. */
if (cmdp->argc != 0)
for (p = cmdp->argv[0]->bp; *p && isblank(*p); ++p);
/* If no arguments, just write the file back. */
if (cmdp->argc == 0 || *p == '\0') {
if (F_ISSET(cmdp, E_ADDR2_ALL))
LF_SET(FS_ALL);
return (file_write(sp, ep,
&cmdp->addr1, &cmdp->addr2, NULL, flags));
}
/* If "write !" it's a pipe to a utility. */
exp = EXP(sp);
if (cmd == WRITE && *p == '!') {
for (++p; *p && isblank(*p); ++p);
if (*p == '\0') {
msgq(sp, M_ERR, "Usage: %s.", cmdp->cmd->usage);
return (1);
}
/* Expand the argument. */
if (argv_exp1(sp, ep, cmdp, p, strlen(p), 0))
return (1);
if (filtercmd(sp, ep, &cmdp->addr1, &cmdp->addr2,
&rm, cmdp->argv[1]->bp, FILTER_WRITE))
return (1);
sp->lno = rm.lno;
return (0);
}
/* If "write >>" it's an append to a file. */
if (cmd != XIT && p[0] == '>' && p[1] == '>') {
LF_SET(FS_APPEND);
/* Skip ">>" and whitespace. */
for (p += 2; *p && isblank(*p); ++p);
}
/* Build an argv so we get an argument count and file expansion. */
if (argv_exp2(sp, ep, cmdp, p, strlen(p), 0))
return (1);
switch (cmdp->argc) {
case 1:
/*
* Nothing to expand, write the current file.
* XXX
* Should never happen, already checked this case.
*/
name = NULL;
break;
case 2:
/* One new argument, write it. */
name = cmdp->argv[exp->argsoff - 1]->bp;
set_alt_name(sp, name);
break;
default:
/* If expanded to more than one argument, object. */
msgq(sp, M_ERR, "%s expanded into too many file names",
cmdp->argv[0]->bp);
msgq(sp, M_ERR, "Usage: %s.", cmdp->cmd->usage);
return (1);
}
if (F_ISSET(cmdp, E_ADDR2_ALL))
LF_SET(FS_ALL);
return (file_write(sp, ep, &cmdp->addr1, &cmdp->addr2, name, flags));
}
/*
* ex_writefp --
* Write a range of lines to a FILE *.
*/
int
ex_writefp(sp, ep, name, fp, fm, tm, nlno, nch)
SCR *sp;
EXF *ep;
char *name;
FILE *fp;
MARK *fm, *tm;
u_long *nlno, *nch;
{
struct stat sb;
u_long ccnt; /* XXX: can't print off_t portably. */
recno_t fline, tline, lcnt;
size_t len;
int sv_errno;
char *p;
fline = fm->lno;
tline = tm->lno;
if (nlno != NULL) {
*nch = 0;
*nlno = 0;
}
/*
* The vi filter code has multiple processes running simultaneously,
* and one of them calls ex_writefp(). The "unsafe" function calls
* in this code are to file_gline() and msgq(). File_gline() is safe,
* see the comment in filter.c:filtercmd() for details. We don't call
* msgq if the multiple process bit in the EXF is set.
*
* !!!
* Historic vi permitted files of 0 length to be written. However,
* since the way vi got around dealing with "empty" files was to
* always have a line in the file no matter what, it wrote them as
* files of a single, empty line. We write empty files.
*
* "Alex, I'll take vi trivia for $1000."
*/
ccnt = 0;
lcnt = 0;
if (tline != 0) {
for (; fline <= tline; ++fline, ++lcnt) {
if (F_ISSET(sp, S_INTERRUPTED)) {
msgq(sp, M_INFO, "Interrupted.");
break;
}
if ((p = file_gline(sp, ep, fline, &len)) == NULL)
break;
if (fwrite(p, 1, len, fp) != len) {
msgq(sp, M_SYSERR, name);
(void)fclose(fp);
return (1);
}
ccnt += len;
if (putc('\n', fp) != '\n')
break;
++ccnt;
}
}
/* If it's a regular file, sync it so that NFS is forced to flush. */
if (!fstat(fileno(fp), &sb) &&
S_ISREG(sb.st_mode) && fsync(fileno(fp))) {
sv_errno = errno;
(void)fclose(fp);
errno = sv_errno;
goto err;
}
if (fclose(fp))
goto err;
if (nlno != NULL) {
*nch = ccnt;
*nlno = lcnt;
}
return (0);
err: if (!F_ISSET(ep, F_MULTILOCK))
msgq(sp, M_SYSERR, name);
return (1);
}