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

251 lines
6.2 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_read.c 8.26 (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 <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_read -- :read [file]
* :read [! cmd]
* Read from a file or utility.
*/
int
ex_read(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
struct stat sb;
FILE *fp;
MARK rm;
recno_t nlines;
size_t blen, len;
int btear, itear, rval;
char *bp, *name;
/*
* If "read !", it's a pipe from a utility.
*
* !!!
* Historical vi wouldn't undo a filter read, for no apparent
* reason.
*/
if (F_ISSET(cmdp, E_FORCE)) {
/* Expand the user's argument. */
if (argv_exp1(sp, ep,
cmdp, cmdp->argv[0]->bp, cmdp->argv[0]->len, 0))
return (1);
/* If argc still 1, there wasn't anything to expand. */
if (cmdp->argc == 1) {
msgq(sp, M_ERR, "Usage: %s.", cmdp->cmd->usage);
return (1);
}
/* Redisplay the user's argument if it's changed. */
if (F_ISSET(cmdp, E_MODIFY) && IN_VI_MODE(sp)) {
len = cmdp->argv[1]->len;
GET_SPACE_RET(sp, bp, blen, len + 2);
bp[0] = '!';
memmove(bp + 1, cmdp->argv[1], cmdp->argv[1]->len + 1);
(void)sp->s_busy(sp, bp);
FREE_SPACE(sp, bp, blen);
}
if (filtercmd(sp, ep,
&cmdp->addr1, NULL, &rm, cmdp->argv[1]->bp, FILTER_READ))
return (1);
sp->lno = rm.lno;
return (0);
}
/* Expand the user's argument. */
if (argv_exp2(sp, ep,
cmdp, cmdp->argv[0]->bp, cmdp->argv[0]->len, 0))
return (1);
switch (cmdp->argc) {
case 1:
/*
* No arguments, read the current file.
* Doesn't set the alternate file name.
*/
name = FILENAME(sp->frp);
break;
case 2:
/*
* One argument, read it.
* Sets the alternate file name.
*/
name = cmdp->argv[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);
}
/*
* !!!
* Historically, vi did not permit reads from non-regular files,
* nor did it distinguish between "read !" and "read!", so there
* was no way to "force" it.
*/
if ((fp = fopen(name, "r")) == NULL || fstat(fileno(fp), &sb)) {
msgq(sp, M_SYSERR, name);
return (1);
}
if (!S_ISREG(sb.st_mode)) {
(void)fclose(fp);
msgq(sp, M_ERR, "Only regular files may be read.");
return (1);
}
/*
* Nvi handles the interrupt when reading from a file, but not
* when reading from a filter, since the terminal settings have
* been reset.
*/
btear = F_ISSET(sp, S_EXSILENT) ? 0 : !busy_on(sp, "Reading...");
itear = !intr_init(sp);
rval = ex_readfp(sp, ep, name, fp, &cmdp->addr1, &nlines, 1);
if (btear)
busy_off(sp);
if (itear)
intr_end(sp);
/*
* Set the cursor to the first line read in, if anything read
* in, otherwise, the address. (Historic vi set it to the
* line after the address regardless, but since that line may
* not exist we don't bother.)
*/
sp->lno = cmdp->addr1.lno;
if (nlines)
++sp->lno;
F_SET(EXP(sp), EX_AUTOPRINT);
return (rval);
}
/*
* ex_readfp --
* Read lines into the file.
*/
int
ex_readfp(sp, ep, name, fp, fm, nlinesp, success_msg)
SCR *sp;
EXF *ep;
char *name;
FILE *fp;
MARK *fm;
recno_t *nlinesp;
int success_msg;
{
EX_PRIVATE *exp;
recno_t lcnt, lno;
size_t len;
u_long ccnt; /* XXX: can't print off_t portably. */
int rval;
rval = 0;
exp = EXP(sp);
/*
* Add in the lines from the output. Insertion starts at the line
* following the address.
*/
ccnt = 0;
lcnt = 0;
for (lno = fm->lno; !ex_getline(sp, fp, &len); ++lno, ++lcnt) {
if (F_ISSET(sp, S_INTERRUPTED)) {
msgq(sp, M_INFO, "Interrupted.");
break;
}
if (file_aline(sp, ep, 1, lno, exp->ibp, len)) {
rval = 1;
break;
}
ccnt += len;
}
if (ferror(fp)) {
msgq(sp, M_SYSERR, name);
rval = 1;
}
if (fclose(fp)) {
msgq(sp, M_SYSERR, name);
return (1);
}
if (rval)
return (1);
/* Return the number of lines read in. */
if (nlinesp != NULL)
*nlinesp = lcnt;
if (success_msg)
msgq(sp, M_INFO, "%s: %lu line%s, %lu characters.",
name, lcnt, lcnt == 1 ? "" : "s", ccnt);
return (0);
}