initial import of NetBSD tree

1 files changed, 300 insertions, 0 deletions

diff --git a/usr.bin/vi/ex/ex_read.c b/usr.bin/vi/ex/ex_read.c
new file mode 100644
index 00000000000..cef1e3aee35
--- /dev/null
+++ b/usr.bin/vi/ex/ex_read.c
@@ -0,0 +1,300 @@
+/*-
+ * 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	8.41 (Berkeley) 8/17/94";
+#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.
+ *
+ * !!!
+ * Historical vi wouldn't undo a filter read, for no apparent reason.
+ */
+int
+ex_read(sp, ep, cmdp)
+	SCR *sp;
+	EXF *ep;
+	EXCMDARG *cmdp;
+{
+	struct stat sb;
+	CHAR_T *arg, *name;
+	EX_PRIVATE *exp;
+	FILE *fp;
+	MARK rm;
+	recno_t nlines;
+	size_t arglen, blen, len;
+	int btear, farg, rval;
+	char *p;
+
+	/*
+	 *  0 args: we're done.
+	 *  1 args: check for "read !arg".
+	 *  2 args: check for "read ! arg".
+	 * >2 args: object, too many args.
+	 */
+	farg = 0;
+	switch (cmdp->argc) {
+	case 0:
+		break;
+	case 1:
+		arg = cmdp->argv[0]->bp;
+		arglen = cmdp->argv[0]->len;
+		if (*arg == '!') {
+			++arg;
+			--arglen;
+			farg = 1;
+		}
+		break;
+	case 2:
+		if (cmdp->argv[0]->len == 1 && cmdp->argv[0]->bp[0] == '!')  {
+			arg = cmdp->argv[1]->bp;
+			arglen = cmdp->argv[1]->len;
+			farg = 2;
+			break;
+		}
+		/* FALLTHROUGH */
+	default:
+		goto badarg;
+	}
+
+	if (farg != 0) {
+		/* File name and bang expand the user's argument. */
+		if (argv_exp1(sp, ep, cmdp, arg, arglen, 1))
+			return (1);
+
+		/* If argc unchanged, there wasn't anything to expand. */
+		if (cmdp->argc == farg)
+			goto usage;
+
+		/* Set the last bang command. */
+		exp = EXP(sp);
+		if (exp->lastbcomm != NULL)
+			free(exp->lastbcomm);
+		if ((exp->lastbcomm = strdup(cmdp->argv[farg]->bp)) == NULL) {
+			msgq(sp, M_SYSERR, NULL);
+			return (1);
+		}
+
+		/* Redisplay the user's argument if it's changed. */
+		if (F_ISSET(cmdp, E_MODIFY) && IN_VI_MODE(sp)) {
+			len = cmdp->argv[farg]->len;
+			GET_SPACE_RET(sp, p, blen, len + 2);
+			p[0] = '!';
+			memmove(p + 1,
+			    cmdp->argv[farg]->bp, cmdp->argv[farg]->len + 1);
+			(void)sp->s_busy(sp, p);
+			FREE_SPACE(sp, p, blen);
+		}
+
+		if (filtercmd(sp, ep, &cmdp->addr1,
+		    NULL, &rm, cmdp->argv[farg]->bp, FILTER_READ))
+			return (1);
+
+		/* The filter version of read set the autoprint flag. */
+		F_SET(EXP(sp), EX_AUTOPRINT);
+
+		/* If in vi mode, move to the first nonblank. */
+		sp->lno = rm.lno;
+		if (IN_VI_MODE(sp)) {
+			sp->cno = 0;
+			(void)nonblank(sp, ep, sp->lno, &sp->cno);
+		}
+		return (0);
+	}
+
+	/* Shell and file name expand the user's argument. */
+	if (argv_exp2(sp, ep, cmdp, arg, arglen, 0))
+		return (1);
+
+	/*
+	 *  0 args: no arguments, read the current file, don't set the
+	 *	    alternate file name.
+	 *  1 args: read it, switching to it or settgin the alternate file
+	 *	    name.
+	 * >1 args: object, too many args.
+	 */
+	switch (cmdp->argc) {
+	case 1:
+		name = sp->frp->name;
+		break;
+	case 2:
+		name = cmdp->argv[1]->bp;
+		/*
+		 * !!!
+		 * Historically, if you had an "unnamed" file, the read command
+		 * renamed the file.
+		 */
+		if (F_ISSET(sp->frp, FR_TMPFILE) &&
+		    !F_ISSET(sp->frp, FR_READNAMED)) {
+			if ((p = v_strdup(sp,
+			    cmdp->argv[1]->bp, cmdp->argv[1]->len)) != NULL) {
+				free(sp->frp->name);
+				sp->frp->name = p;
+			}
+			F_SET(sp->frp, FR_NAMECHANGE | FR_READNAMED);
+		} else
+			set_alt_name(sp, name);
+		break;
+	default:
+badarg:		msgq(sp, M_ERR,
+		    "%s expanded into too many file names", cmdp->argv[0]->bp);
+usage:		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, "%s", name);
+		return (1);
+	}
+	if (!S_ISREG(sb.st_mode)) {
+		(void)fclose(fp);
+		msgq(sp, M_ERR, "Only regular files may be read");
+		return (1);
+	}
+
+	/* Turn on busy message. */
+	btear = F_ISSET(sp, S_EXSILENT) ? 0 : !busy_on(sp, "Reading...");
+	rval = ex_readfp(sp, ep, name, fp, &cmdp->addr1, &nlines, 1);
+	if (btear)
+		busy_off(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;
+
+	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 (INTERRUPTED(sp)) {
+			if (!success_msg)
+				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, "%s", name);
+		rval = 1;
+	}
+
+	if (fclose(fp)) {
+		msgq(sp, M_SYSERR, "%s", 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%s: %lu line%s, %lu characters",
+		    INTERRUPTED(sp) ? "Interrupted read: " : "",
+		    name, lcnt, lcnt == 1 ? "" : "s", ccnt);
+
+	return (0);
+}