251 lines
6.2 KiB
C
251 lines
6.2 KiB
C
/*-
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* Copyright (c) 1992, 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_read.c 8.26 (Berkeley) 3/23/94";
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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/stat.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <ctype.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 <stdlib.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_read -- :read [file]
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* :read [! cmd]
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* Read from a file or utility.
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*/
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int
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ex_read(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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struct stat sb;
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FILE *fp;
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MARK rm;
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recno_t nlines;
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size_t blen, len;
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int btear, itear, rval;
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char *bp, *name;
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/*
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* If "read !", it's a pipe from a utility.
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*
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* !!!
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* Historical vi wouldn't undo a filter read, for no apparent
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* reason.
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*/
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if (F_ISSET(cmdp, E_FORCE)) {
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/* Expand the user's argument. */
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if (argv_exp1(sp, ep,
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cmdp, cmdp->argv[0]->bp, cmdp->argv[0]->len, 0))
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return (1);
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/* If argc still 1, there wasn't anything to expand. */
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if (cmdp->argc == 1) {
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msgq(sp, M_ERR, "Usage: %s.", cmdp->cmd->usage);
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return (1);
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}
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/* Redisplay the user's argument if it's changed. */
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if (F_ISSET(cmdp, E_MODIFY) && IN_VI_MODE(sp)) {
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len = cmdp->argv[1]->len;
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GET_SPACE_RET(sp, bp, blen, len + 2);
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bp[0] = '!';
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memmove(bp + 1, cmdp->argv[1], cmdp->argv[1]->len + 1);
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(void)sp->s_busy(sp, bp);
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FREE_SPACE(sp, bp, blen);
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}
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if (filtercmd(sp, ep,
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&cmdp->addr1, NULL, &rm, cmdp->argv[1]->bp, FILTER_READ))
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return (1);
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sp->lno = rm.lno;
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return (0);
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}
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/* Expand the user's argument. */
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if (argv_exp2(sp, ep,
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cmdp, cmdp->argv[0]->bp, cmdp->argv[0]->len, 0))
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return (1);
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switch (cmdp->argc) {
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case 1:
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/*
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* No arguments, read the current file.
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* Doesn't set the alternate file name.
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*/
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name = FILENAME(sp->frp);
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break;
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case 2:
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/*
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* One argument, read it.
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* Sets the alternate file name.
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*/
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name = cmdp->argv[1]->bp;
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set_alt_name(sp, name);
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break;
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default:
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/* If expanded to more than one argument, object. */
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msgq(sp, M_ERR,
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"%s expanded into too many file names", cmdp->argv[0]->bp);
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msgq(sp, M_ERR, "Usage: %s.", cmdp->cmd->usage);
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return (1);
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}
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/*
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* !!!
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* Historically, vi did not permit reads from non-regular files,
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* nor did it distinguish between "read !" and "read!", so there
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* was no way to "force" it.
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*/
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if ((fp = fopen(name, "r")) == NULL || fstat(fileno(fp), &sb)) {
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msgq(sp, M_SYSERR, name);
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return (1);
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}
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if (!S_ISREG(sb.st_mode)) {
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(void)fclose(fp);
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msgq(sp, M_ERR, "Only regular files may be read.");
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return (1);
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}
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/*
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* Nvi handles the interrupt when reading from a file, but not
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* when reading from a filter, since the terminal settings have
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* been reset.
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*/
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btear = F_ISSET(sp, S_EXSILENT) ? 0 : !busy_on(sp, "Reading...");
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itear = !intr_init(sp);
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rval = ex_readfp(sp, ep, name, fp, &cmdp->addr1, &nlines, 1);
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if (btear)
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busy_off(sp);
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if (itear)
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intr_end(sp);
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/*
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* Set the cursor to the first line read in, if anything read
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* in, otherwise, the address. (Historic vi set it to the
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* line after the address regardless, but since that line may
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* not exist we don't bother.)
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*/
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sp->lno = cmdp->addr1.lno;
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if (nlines)
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++sp->lno;
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F_SET(EXP(sp), EX_AUTOPRINT);
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return (rval);
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}
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/*
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* ex_readfp --
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* Read lines into the file.
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*/
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int
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ex_readfp(sp, ep, name, fp, fm, nlinesp, success_msg)
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SCR *sp;
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EXF *ep;
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char *name;
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FILE *fp;
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MARK *fm;
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recno_t *nlinesp;
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int success_msg;
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{
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EX_PRIVATE *exp;
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recno_t lcnt, lno;
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size_t len;
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u_long ccnt; /* XXX: can't print off_t portably. */
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int rval;
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rval = 0;
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exp = EXP(sp);
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/*
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* Add in the lines from the output. Insertion starts at the line
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* following the address.
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*/
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ccnt = 0;
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lcnt = 0;
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for (lno = fm->lno; !ex_getline(sp, fp, &len); ++lno, ++lcnt) {
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if (F_ISSET(sp, S_INTERRUPTED)) {
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msgq(sp, M_INFO, "Interrupted.");
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break;
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}
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if (file_aline(sp, ep, 1, lno, exp->ibp, len)) {
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rval = 1;
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break;
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}
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ccnt += len;
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}
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if (ferror(fp)) {
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msgq(sp, M_SYSERR, name);
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rval = 1;
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}
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if (fclose(fp)) {
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msgq(sp, M_SYSERR, name);
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return (1);
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}
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if (rval)
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return (1);
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/* Return the number of lines read in. */
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if (nlinesp != NULL)
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*nlinesp = lcnt;
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if (success_msg)
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msgq(sp, M_INFO, "%s: %lu line%s, %lu characters.",
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name, lcnt, lcnt == 1 ? "" : "s", ccnt);
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return (0);
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}
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