Post-cvs2svn flatten pass.

1 files changed, 1141 insertions, 0 deletions

diff --git a/common/options.c b/common/options.c
new file mode 100644
index 000000000000..973778c78bbd
--- /dev/null
+++ b/common/options.c
@@ -0,0 +1,1141 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 1991, 1993, 1994, 1995, 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)options.c	10.51 (Berkeley) 10/14/96";
+#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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "../vi/vi.h"
+#include "pathnames.h"
+
+static int	 	 opts_abbcmp __P((const void *, const void *));
+static int	 	 opts_cmp __P((const void *, const void *));
+static int	 	 opts_print __P((SCR *, OPTLIST const *));
+
+/*
+ * O'Reilly noted options and abbreviations are from "Learning the VI Editor",
+ * Fifth Edition, May 1992.  There's no way of knowing what systems they are
+ * actually from.
+ *
+ * HPUX noted options and abbreviations are from "The Ultimate Guide to the
+ * VI and EX Text Editors", 1990.
+ */
+OPTLIST const optlist[] = {
+/* O_ALTWERASE	  4.4BSD */
+	{"altwerase",	f_altwerase,	OPT_0BOOL,	0},
+/* O_AUTOINDENT	    4BSD */
+	{"autoindent",	NULL,		OPT_0BOOL,	0},
+/* O_AUTOPRINT	    4BSD */
+	{"autoprint",	NULL,		OPT_1BOOL,	0},
+/* O_AUTOWRITE	    4BSD */
+	{"autowrite",	NULL,		OPT_0BOOL,	0},
+/* O_BACKUP	  4.4BSD */
+	{"backup",	NULL,		OPT_STR,	0},
+/* O_BEAUTIFY	    4BSD */
+	{"beautify",	NULL,		OPT_0BOOL,	0},
+/* O_CDPATH	  4.4BSD */
+	{"cdpath",	NULL,		OPT_STR,	0},
+/* O_CEDIT	  4.4BSD */
+	{"cedit",	NULL,		OPT_STR,	0},
+/* O_COLUMNS	  4.4BSD */
+	{"columns",	f_columns,	OPT_NUM,	OPT_NOSAVE},
+/* O_COMMENT	  4.4BSD */
+	{"comment",	NULL,		OPT_0BOOL,	0},
+/* O_DIRECTORY	    4BSD */
+	{"directory",	NULL,		OPT_STR,	0},
+/* O_EDCOMPATIBLE   4BSD */
+	{"edcompatible",NULL,		OPT_0BOOL,	0},
+/* O_ESCAPETIME	  4.4BSD */
+	{"escapetime",	NULL,		OPT_NUM,	0},
+/* O_ERRORBELLS	    4BSD */
+	{"errorbells",	NULL,		OPT_0BOOL,	0},
+/* O_EXRC	System V (undocumented) */
+	{"exrc",	NULL,		OPT_0BOOL,	0},
+/* O_EXTENDED	  4.4BSD */
+	{"extended",	f_recompile,	OPT_0BOOL,	0},
+/* O_FILEC	  4.4BSD */
+	{"filec",	NULL,		OPT_STR,	0},
+/* O_FLASH	    HPUX */
+	{"flash",	NULL,		OPT_1BOOL,	0},
+/* O_HARDTABS	    4BSD */
+	{"hardtabs",	NULL,		OPT_NUM,	0},
+/* O_ICLOWER	  4.4BSD */
+	{"iclower",	f_recompile,	OPT_0BOOL,	0},
+/* O_IGNORECASE	    4BSD */
+	{"ignorecase",	f_recompile,	OPT_0BOOL,	0},
+/* O_KEYTIME	  4.4BSD */
+	{"keytime",	NULL,		OPT_NUM,	0},
+/* O_LEFTRIGHT	  4.4BSD */
+	{"leftright",	f_reformat,	OPT_0BOOL,	0},
+/* O_LINES	  4.4BSD */
+	{"lines",	f_lines,	OPT_NUM,	OPT_NOSAVE},
+/* O_LISP	    4BSD
+ *	XXX
+ *	When the lisp option is implemented, delete the OPT_NOSAVE flag,
+ *	so that :mkexrc dumps it.
+ */
+	{"lisp",	f_lisp,		OPT_0BOOL,	OPT_NOSAVE},
+/* O_LIST	    4BSD */
+	{"list",	f_reformat,	OPT_0BOOL,	0},
+/* O_LOCKFILES	  4.4BSD
+ *	XXX
+ *	Locking isn't reliable enough over NFS to require it, in addition,
+ *	it's a serious startup performance problem over some remote links.
+ */
+	{"lock",	NULL,		OPT_1BOOL,	0},
+/* O_MAGIC	    4BSD */
+	{"magic",	NULL,		OPT_1BOOL,	0},
+/* O_MATCHTIME	  4.4BSD */
+	{"matchtime",	NULL,		OPT_NUM,	0},
+/* O_MESG	    4BSD */
+	{"mesg",	NULL,		OPT_1BOOL,	0},
+/* O_MODELINE	    4BSD
+ *	!!!
+ *	This has been documented in historical systems as both "modeline"
+ *	and as "modelines".  Regardless of the name, this option represents
+ *	a security problem of mammoth proportions, not to mention a stunning
+ *	example of what your intro CS professor referred to as the perils of
+ *	mixing code and data.  Don't add it, or I will kill you.
+ */
+	{"modeline",	NULL,		OPT_0BOOL,	OPT_NOSET},
+/* O_MSGCAT	  4.4BSD */
+	{"msgcat",	f_msgcat,	OPT_STR,	0},
+/* O_NOPRINT	  4.4BSD */
+	{"noprint",	f_print,	OPT_STR,	0},
+/* O_NUMBER	    4BSD */
+	{"number",	f_reformat,	OPT_0BOOL,	0},
+/* O_OCTAL	  4.4BSD */
+	{"octal",	f_print,	OPT_0BOOL,	0},
+/* O_OPEN	    4BSD */
+	{"open",	NULL,		OPT_1BOOL,	0},
+/* O_OPTIMIZE	    4BSD */
+	{"optimize",	NULL,		OPT_1BOOL,	0},
+/* O_PARAGRAPHS	    4BSD */
+	{"paragraphs",	f_paragraph,	OPT_STR,	0},
+/* O_PATH	  4.4BSD */
+	{"path",	NULL,		OPT_STR,	0},
+/* O_PRINT	  4.4BSD */
+	{"print",	f_print,	OPT_STR,	0},
+/* O_PROMPT	    4BSD */
+	{"prompt",	NULL,		OPT_1BOOL,	0},
+/* O_READONLY	    4BSD (undocumented) */
+	{"readonly",	f_readonly,	OPT_0BOOL,	OPT_ALWAYS},
+/* O_RECDIR	  4.4BSD */
+	{"recdir",	NULL,		OPT_STR,	0},
+/* O_REDRAW	    4BSD */
+	{"redraw",	NULL,		OPT_0BOOL,	0},
+/* O_REMAP	    4BSD */
+	{"remap",	NULL,		OPT_1BOOL,	0},
+/* O_REPORT	    4BSD */
+	{"report",	NULL,		OPT_NUM,	0},
+/* O_RULER	  4.4BSD */
+	{"ruler",	NULL,		OPT_0BOOL,	0},
+/* O_SCROLL	    4BSD */
+	{"scroll",	NULL,		OPT_NUM,	0},
+/* O_SEARCHINCR	  4.4BSD */
+	{"searchincr",	NULL,		OPT_0BOOL,	0},
+/* O_SECTIONS	    4BSD */
+	{"sections",	f_section,	OPT_STR,	0},
+/* O_SECURE	  4.4BSD */
+	{"secure",	NULL,		OPT_0BOOL,	OPT_NOUNSET},
+/* O_SHELL	    4BSD */
+	{"shell",	NULL,		OPT_STR,	0},
+/* O_SHELLMETA	  4.4BSD */
+	{"shellmeta",	NULL,		OPT_STR,	0},
+/* O_SHIFTWIDTH	    4BSD */
+	{"shiftwidth",	NULL,		OPT_NUM,	OPT_NOZERO},
+/* O_SHOWMATCH	    4BSD */
+	{"showmatch",	NULL,		OPT_0BOOL,	0},
+/* O_SHOWMODE	  4.4BSD */
+	{"showmode",	NULL,		OPT_0BOOL,	0},
+/* O_SIDESCROLL	  4.4BSD */
+	{"sidescroll",	NULL,		OPT_NUM,	OPT_NOZERO},
+/* O_SLOWOPEN	    4BSD  */
+	{"slowopen",	NULL,		OPT_0BOOL,	0},
+/* O_SOURCEANY	    4BSD (undocumented)
+ *	!!!
+ *	Historic vi, on startup, source'd $HOME/.exrc and ./.exrc, if they
+ *	were owned by the user.  The sourceany option was an undocumented
+ *	feature of historic vi which permitted the startup source'ing of
+ *	.exrc files the user didn't own.  This is an obvious security problem,
+ *	and we ignore the option.
+ */
+	{"sourceany",	NULL,		OPT_0BOOL,	OPT_NOSET},
+/* O_TABSTOP	    4BSD */
+	{"tabstop",	f_reformat,	OPT_NUM,	OPT_NOZERO},
+/* O_TAGLENGTH	    4BSD */
+	{"taglength",	NULL,		OPT_NUM,	0},
+/* O_TAGS	    4BSD */
+	{"tags",	NULL,		OPT_STR,	0},
+/* O_TERM	    4BSD
+ *	!!!
+ *	By default, the historic vi always displayed information about two
+ *	options, redraw and term.  Term seems sufficient.
+ */
+	{"term",	NULL,		OPT_STR,	OPT_ADISP|OPT_NOSAVE},
+/* O_TERSE	    4BSD */
+	{"terse",	NULL,		OPT_0BOOL,	0},
+/* O_TILDEOP      4.4BSD */
+	{"tildeop",	NULL,		OPT_0BOOL,	0},
+/* O_TIMEOUT	    4BSD (undocumented) */
+	{"timeout",	NULL,		OPT_1BOOL,	0},
+/* O_TTYWERASE	  4.4BSD */
+	{"ttywerase",	f_ttywerase,	OPT_0BOOL,	0},
+/* O_VERBOSE	  4.4BSD */
+	{"verbose",	NULL,		OPT_0BOOL,	0},
+/* O_W1200	    4BSD */
+	{"w1200",	f_w1200,	OPT_NUM,	OPT_NDISP|OPT_NOSAVE},
+/* O_W300	    4BSD */
+	{"w300",	f_w300,		OPT_NUM,	OPT_NDISP|OPT_NOSAVE},
+/* O_W9600	    4BSD */
+	{"w9600",	f_w9600,	OPT_NUM,	OPT_NDISP|OPT_NOSAVE},
+/* O_WARN	    4BSD */
+	{"warn",	NULL,		OPT_1BOOL,	0},
+/* O_WINDOW	    4BSD */
+	{"window",	f_window,	OPT_NUM,	0},
+/* O_WINDOWNAME	    4BSD */
+	{"windowname",	NULL,		OPT_0BOOL,	0},
+/* O_WRAPLEN	  4.4BSD */
+	{"wraplen",	NULL,		OPT_NUM,	0},
+/* O_WRAPMARGIN	    4BSD */
+	{"wrapmargin",	NULL,		OPT_NUM,	0},
+/* O_WRAPSCAN	    4BSD */
+	{"wrapscan",	NULL,		OPT_1BOOL,	0},
+/* O_WRITEANY	    4BSD */
+	{"writeany",	NULL,		OPT_0BOOL,	0},
+	{NULL},
+};
+
+typedef struct abbrev {
+        char *name;
+        int offset;
+} OABBREV;
+
+static OABBREV const abbrev[] = {
+	{"ai",		O_AUTOINDENT},		/*     4BSD */
+	{"ap",		O_AUTOPRINT},		/*     4BSD */
+	{"aw",		O_AUTOWRITE},		/*     4BSD */
+	{"bf",		O_BEAUTIFY},		/*     4BSD */
+	{"co",		O_COLUMNS},		/*   4.4BSD */
+	{"dir",		O_DIRECTORY},		/*     4BSD */
+	{"eb",		O_ERRORBELLS},		/*     4BSD */
+	{"ed",		O_EDCOMPATIBLE},	/*     4BSD */
+	{"ex",		O_EXRC},		/* System V (undocumented) */
+	{"ht",		O_HARDTABS},		/*     4BSD */
+	{"ic",		O_IGNORECASE},		/*     4BSD */
+	{"li",		O_LINES},		/*   4.4BSD */
+	{"modelines",	O_MODELINE},		/*     HPUX */
+	{"nu",		O_NUMBER},		/*     4BSD */
+	{"opt",		O_OPTIMIZE},		/*     4BSD */
+	{"para",	O_PARAGRAPHS},		/*     4BSD */
+	{"re",		O_REDRAW},		/* O'Reilly */
+	{"ro",		O_READONLY},		/*     4BSD (undocumented) */
+	{"scr",		O_SCROLL},		/*     4BSD (undocumented) */
+	{"sect",	O_SECTIONS},		/* O'Reilly */
+	{"sh",		O_SHELL},		/*     4BSD */
+	{"slow",	O_SLOWOPEN},		/*     4BSD */
+	{"sm",		O_SHOWMATCH},		/*     4BSD */
+	{"smd",		O_SHOWMODE},		/*     4BSD */
+	{"sw",		O_SHIFTWIDTH},		/*     4BSD */
+	{"tag",		O_TAGS},		/*     4BSD (undocumented) */
+	{"tl",		O_TAGLENGTH},		/*     4BSD */
+	{"to",		O_TIMEOUT},		/*     4BSD (undocumented) */
+	{"ts",		O_TABSTOP},		/*     4BSD */
+	{"tty",		O_TERM},		/*     4BSD (undocumented) */
+	{"ttytype",	O_TERM},		/*     4BSD (undocumented) */
+	{"w",		O_WINDOW},		/* O'Reilly */
+	{"wa",		O_WRITEANY},		/*     4BSD */
+	{"wi",		O_WINDOW},		/*     4BSD (undocumented) */
+	{"wl",		O_WRAPLEN},		/*   4.4BSD */
+	{"wm",		O_WRAPMARGIN},		/*     4BSD */
+	{"ws",		O_WRAPSCAN},		/*     4BSD */
+	{NULL},
+};
+
+/*
+ * opts_init --
+ *	Initialize some of the options.
+ *
+ * PUBLIC: int opts_init __P((SCR *, int *));
+ */
+int
+opts_init(sp, oargs)
+	SCR *sp;
+	int *oargs;
+{
+	ARGS *argv[2], a, b;
+	OPTLIST const *op;
+	u_long v;
+	int cnt, optindx;
+	char *s, b1[1024];
+
+	a.bp = b1;
+	b.bp = NULL;
+	a.len = b.len = 0;
+	argv[0] = &a;
+	argv[1] = &b;
+
+	/* Set numeric and string default values. */
+#define	OI(indx, str) {							\
+	if (str != b1)		/* GCC puts strings in text-space. */	\
+		(void)strcpy(b1, str);					\
+	a.len = strlen(b1);						\
+	if (opts_set(sp, argv, NULL)) {					\
+		 optindx = indx;					\
+		goto err;						\
+	}								\
+}
+	/*
+	 * Indirect global options to global space.  Specifically, set up
+	 * terminal, lines, columns first, they're used by other options.
+	 * Note, don't set the flags until we've set up the indirection.
+	 */
+	if (o_set(sp, O_TERM, 0, NULL, GO_TERM))
+		goto err;
+	F_SET(&sp->opts[O_TERM], OPT_GLOBAL);
+	if (o_set(sp, O_LINES, 0, NULL, GO_LINES))
+		goto err;
+	F_SET(&sp->opts[O_LINES], OPT_GLOBAL);
+	if (o_set(sp, O_COLUMNS, 0, NULL, GO_COLUMNS))
+		goto err;
+	F_SET(&sp->opts[O_COLUMNS], OPT_GLOBAL);
+	if (o_set(sp, O_SECURE, 0, NULL, GO_SECURE))
+		goto err;
+	F_SET(&sp->opts[O_SECURE], OPT_GLOBAL);
+
+	/* Initialize string values. */
+	(void)snprintf(b1, sizeof(b1),
+	    "cdpath=%s", (s = getenv("CDPATH")) == NULL ? ":" : s);
+	OI(O_CDPATH, b1);
+
+	/*
+	 * !!!
+	 * Vi historically stored temporary files in /var/tmp.  We store them
+	 * in /tmp by default, hoping it's a memory based file system.  There
+	 * are two ways to change this -- the user can set either the directory
+	 * option or the TMPDIR environmental variable.
+	 */
+	(void)snprintf(b1, sizeof(b1),
+	    "directory=%s", (s = getenv("TMPDIR")) == NULL ? _PATH_TMP : s);
+	OI(O_DIRECTORY, b1);
+	OI(O_ESCAPETIME, "escapetime=1");
+	OI(O_KEYTIME, "keytime=6");
+	OI(O_MATCHTIME, "matchtime=7");
+	(void)snprintf(b1, sizeof(b1), "msgcat=%s", _PATH_MSGCAT);
+	OI(O_MSGCAT, b1);
+	OI(O_REPORT, "report=5");
+	OI(O_PARAGRAPHS, "paragraphs=IPLPPPQPP LIpplpipbp");
+	(void)snprintf(b1, sizeof(b1), "path=%s", "");
+	OI(O_PATH, b1);
+	(void)snprintf(b1, sizeof(b1), "recdir=%s", _PATH_PRESERVE);
+	OI(O_RECDIR, b1);
+	OI(O_SECTIONS, "sections=NHSHH HUnhsh");
+	(void)snprintf(b1, sizeof(b1),
+	    "shell=%s", (s = getenv("SHELL")) == NULL ? _PATH_BSHELL : s);
+	OI(O_SHELL, b1);
+	OI(O_SHELLMETA, "shellmeta=~{[*?$`'\"\\");
+	OI(O_SHIFTWIDTH, "shiftwidth=8");
+	OI(O_SIDESCROLL, "sidescroll=16");
+	OI(O_TABSTOP, "tabstop=8");
+	(void)snprintf(b1, sizeof(b1), "tags=%s", _PATH_TAGS);
+	OI(O_TAGS, b1);
+
+	/*
+	 * XXX
+	 * Initialize O_SCROLL here, after term; initializing term should
+	 * have created a LINES/COLUMNS value.
+	 */
+	if ((v = (O_VAL(sp, O_LINES) - 1) / 2) == 0)
+		v = 1;
+	(void)snprintf(b1, sizeof(b1), "scroll=%ld", v);
+	OI(O_SCROLL, b1);
+
+	/*
+	 * The default window option values are:
+	 *		8 if baud rate <=  600
+	 *	       16 if baud rate <= 1200
+	 *	LINES - 1 if baud rate  > 1200
+	 *
+	 * Note, the windows option code will correct any too-large value
+	 * or when the O_LINES value is 1.
+	 */
+	if (sp->gp->scr_baud(sp, &v))
+		return (1);
+	if (v <= 600)
+		v = 8;
+	else if (v <= 1200)
+		v = 16;
+	else
+		v = O_VAL(sp, O_LINES) - 1;
+	(void)snprintf(b1, sizeof(b1), "window=%lu", v);
+	OI(O_WINDOW, b1);
+
+	/*
+	 * Set boolean default values, and copy all settings into the default
+	 * information.  OS_NOFREE is set, we're copying, not replacing.
+	 */
+	for (op = optlist, cnt = 0; op->name != NULL; ++op, ++cnt)
+		switch (op->type) {
+		case OPT_0BOOL:
+			break;
+		case OPT_1BOOL:
+			O_SET(sp, cnt);
+			O_D_SET(sp, cnt);
+			break;
+		case OPT_NUM:
+			o_set(sp, cnt, OS_DEF, NULL, O_VAL(sp, cnt));
+			break;
+		case OPT_STR:
+			if (O_STR(sp, cnt) != NULL && o_set(sp, cnt,
+			    OS_DEF | OS_NOFREE | OS_STRDUP, O_STR(sp, cnt), 0))
+				goto err;
+			break;
+		default:
+			abort();
+		}
+
+	/*
+	 * !!!
+	 * Some options can be initialized by the command name or the
+	 * command-line arguments.  They don't set the default values,
+	 * it's historic practice.
+	 */
+	for (; *oargs != -1; ++oargs)
+		OI(*oargs, optlist[*oargs].name);
+	return (0);
+#undef OI
+
+err:	msgq(sp, M_ERR,
+	    "031|Unable to set default %s option", optlist[optindx].name);
+	return (1);
+}
+
+/*
+ * opts_set --
+ *	Change the values of one or more options.
+ *
+ * PUBLIC: int opts_set __P((SCR *, ARGS *[], char *));
+ */
+int
+opts_set(sp, argv, usage)
+	SCR *sp;
+	ARGS *argv[];
+	char *usage;
+{
+	enum optdisp disp;
+	enum nresult nret;
+	OPTLIST const *op;
+	OPTION *spo;
+	u_long value, turnoff;
+	int ch, equals, nf, nf2, offset, qmark, rval;
+	char *endp, *name, *p, *sep, *t;
+
+	disp = NO_DISPLAY;
+	for (rval = 0; argv[0]->len != 0; ++argv) {
+		/*
+		 * The historic vi dumped the options for each occurrence of
+		 * "all" in the set list.  Puhleeze.
+		 */
+		if (!strcmp(argv[0]->bp, "all")) {
+			disp = ALL_DISPLAY;
+			continue;
+		}
+
+		/* Find equals sign or question mark. */
+		for (sep = NULL, equals = qmark = 0,
+		    p = name = argv[0]->bp; (ch = *p) != '\0'; ++p)
+			if (ch == '=' || ch == '?') {
+				if (p == name) {
+					if (usage != NULL)
+						msgq(sp, M_ERR,
+						    "032|Usage: %s", usage);
+					return (1);
+				}
+				sep = p;
+				if (ch == '=')
+					equals = 1;
+				else
+					qmark = 1;
+				break;
+			}
+
+		turnoff = 0;
+		op = NULL;
+		if (sep != NULL)
+			*sep++ = '\0';
+
+		/* Search for the name, then name without any leading "no". */
+		if ((op = opts_search(name)) == NULL &&
+		    name[0] == 'n' && name[1] == 'o') {
+			turnoff = 1;
+			name += 2;
+			op = opts_search(name);
+		}
+		if (op == NULL) {
+			opts_nomatch(sp, name);
+			rval = 1;
+			continue;
+		}
+
+		/* Find current option values. */
+		offset = op - optlist;
+		spo = sp->opts + offset;
+
+		/*
+		 * !!!
+		 * Historically, the question mark could be a separate
+		 * argument.
+		 */
+		if (!equals && !qmark &&
+		    argv[1]->len == 1 && argv[1]->bp[0] == '?') {
+			++argv;
+			qmark = 1;
+		}
+
+		/* Set name, value. */
+		switch (op->type) {
+		case OPT_0BOOL:
+		case OPT_1BOOL:
+			/* Some options may not be reset. */
+			if (F_ISSET(op, OPT_NOUNSET) && turnoff) {
+				msgq_str(sp, M_ERR, name,
+			    "291|set: the %s option may not be turned off");
+				rval = 1;
+				break;
+			}
+
+			/* Some options may not be set. */
+			if (F_ISSET(op, OPT_NOSET) && !turnoff) {
+				msgq_str(sp, M_ERR, name,
+			    "313|set: the %s option may never be turned on");
+				rval = 1;
+				break;
+			}
+
+			if (equals) {
+				msgq_str(sp, M_ERR, name,
+			    "034|set: [no]%s option doesn't take a value");
+				rval = 1;
+				break;
+			}
+			if (qmark) {
+				if (!disp)
+					disp = SELECT_DISPLAY;
+				F_SET(spo, OPT_SELECTED);
+				break;
+			}
+
+			/*
+			 * Do nothing if the value is unchanged, the underlying
+			 * functions can be expensive.
+			 */
+			if (!F_ISSET(op, OPT_ALWAYS))
+				if (turnoff) {
+					if (!O_ISSET(sp, offset))
+						break;
+				} else {
+					if (O_ISSET(sp, offset))
+						break;
+				}
+
+			/* Report to subsystems. */
+			if (op->func != NULL &&
+			    op->func(sp, spo, NULL, &turnoff) ||
+			    ex_optchange(sp, offset, NULL, &turnoff) ||
+			    v_optchange(sp, offset, NULL, &turnoff) ||
+			    sp->gp->scr_optchange(sp, offset, NULL, &turnoff)) {
+				rval = 1;
+				break;
+			}
+
+			/* Set the value. */
+			if (turnoff)
+				O_CLR(sp, offset);
+			else
+				O_SET(sp, offset);
+			break;
+		case OPT_NUM:
+			if (turnoff) {
+				msgq_str(sp, M_ERR, name,
+				    "035|set: %s option isn't a boolean");
+				rval = 1;
+				break;
+			}
+			if (qmark || !equals) {
+				if (!disp)
+					disp = SELECT_DISPLAY;
+				F_SET(spo, OPT_SELECTED);
+				break;
+			}
+
+			if (!isdigit(sep[0]))
+				goto badnum;
+			if ((nret =
+			    nget_uslong(&value, sep, &endp, 10)) != NUM_OK) {
+				p = msg_print(sp, name, &nf);
+				t = msg_print(sp, sep, &nf2);
+				switch (nret) {
+				case NUM_ERR:
+					msgq(sp, M_SYSERR,
+					    "036|set: %s option: %s", p, t);
+					break;
+				case NUM_OVER:
+					msgq(sp, M_ERR,
+			    "037|set: %s option: %s: value overflow", p, t);
+					break;
+				case NUM_OK:
+				case NUM_UNDER:
+					abort();
+				}
+				if (nf)
+					FREE_SPACE(sp, p, 0);
+				if (nf2)
+					FREE_SPACE(sp, t, 0);
+				rval = 1;
+				break;
+			}
+			if (*endp && !isblank(*endp)) {
+badnum:				p = msg_print(sp, name, &nf);
+				t = msg_print(sp, sep, &nf2);
+				msgq(sp, M_ERR,
+		    "038|set: %s option: %s is an illegal number", p, t);
+				if (nf)
+					FREE_SPACE(sp, p, 0);
+				if (nf2)
+					FREE_SPACE(sp, t, 0);
+				rval = 1;
+				break;
+			}
+
+			/* Some options may never be set to zero. */
+			if (F_ISSET(op, OPT_NOZERO) && value == 0) {
+				msgq_str(sp, M_ERR, name,
+			    "314|set: the %s option may never be set to 0");
+				rval = 1;
+				break;
+			}
+
+			/*
+			 * Do nothing if the value is unchanged, the underlying
+			 * functions can be expensive.
+			 */
+			if (!F_ISSET(op, OPT_ALWAYS) &&
+			    O_VAL(sp, offset) == value)
+				break;
+
+			/* Report to subsystems. */
+			if (op->func != NULL &&
+			    op->func(sp, spo, sep, &value) ||
+			    ex_optchange(sp, offset, sep, &value) ||
+			    v_optchange(sp, offset, sep, &value) ||
+			    sp->gp->scr_optchange(sp, offset, sep, &value)) {
+				rval = 1;
+				break;
+			}
+
+			/* Set the value. */
+			if (o_set(sp, offset, 0, NULL, value))
+				rval = 1;
+			break;
+		case OPT_STR:
+			if (turnoff) {
+				msgq_str(sp, M_ERR, name,
+				    "039|set: %s option isn't a boolean");
+				rval = 1;
+				break;
+			}
+			if (qmark || !equals) {
+				if (!disp)
+					disp = SELECT_DISPLAY;
+				F_SET(spo, OPT_SELECTED);
+				break;
+			}
+
+			/*
+			 * Do nothing if the value is unchanged, the underlying
+			 * functions can be expensive.
+			 */
+			if (!F_ISSET(op, OPT_ALWAYS) &&
+			    O_STR(sp, offset) != NULL &&
+			    !strcmp(O_STR(sp, offset), sep))
+				break;
+
+			/* Report to subsystems. */
+			if (op->func != NULL &&
+			    op->func(sp, spo, sep, NULL) ||
+			    ex_optchange(sp, offset, sep, NULL) ||
+			    v_optchange(sp, offset, sep, NULL) ||
+			    sp->gp->scr_optchange(sp, offset, sep, NULL)) {
+				rval = 1;
+				break;
+			}
+
+			/* Set the value. */
+			if (o_set(sp, offset, OS_STRDUP, sep, 0))
+				rval = 1;
+			break;
+		default:
+			abort();
+		}
+	}
+	if (disp != NO_DISPLAY)
+		opts_dump(sp, disp);
+	return (rval);
+}
+
+/*
+ * o_set --
+ *	Set an option's value.
+ *
+ * PUBLIC: int o_set __P((SCR *, int, u_int, char *, u_long));
+ */
+int
+o_set(sp, opt, flags, str, val)
+	SCR *sp;
+	int opt;
+	u_int flags;
+	char *str;
+	u_long val;
+{
+	OPTION *op;
+
+	/* Set a pointer to the options area. */
+	op = F_ISSET(&sp->opts[opt], OPT_GLOBAL) ?
+	    &sp->gp->opts[sp->opts[opt].o_cur.val] : &sp->opts[opt];
+
+	/* Copy the string, if requested. */
+	if (LF_ISSET(OS_STRDUP) && (str = strdup(str)) == NULL) {
+		msgq(sp, M_SYSERR, NULL);
+		return (1);
+	}
+
+	/* Free the previous string, if requested, and set the value. */
+	if LF_ISSET(OS_DEF)
+		if (LF_ISSET(OS_STR | OS_STRDUP)) {
+			if (!LF_ISSET(OS_NOFREE) && op->o_def.str != NULL)
+				free(op->o_def.str);
+			op->o_def.str = str;
+		} else
+			op->o_def.val = val;
+	else
+		if (LF_ISSET(OS_STR | OS_STRDUP)) {
+			if (!LF_ISSET(OS_NOFREE) && op->o_cur.str != NULL)
+				free(op->o_cur.str);
+			op->o_cur.str = str;
+		} else
+			op->o_cur.val = val;
+	return (0);
+}
+
+/*
+ * opts_empty --
+ *	Return 1 if the string option is invalid, 0 if it's OK.
+ *
+ * PUBLIC: int opts_empty __P((SCR *, int, int));
+ */
+int
+opts_empty(sp, off, silent)
+	SCR *sp;
+	int off, silent;
+{
+	char *p;
+
+	if ((p = O_STR(sp, off)) == NULL || p[0] == '\0') {
+		if (!silent)
+			msgq_str(sp, M_ERR, optlist[off].name,
+			    "305|No %s edit option specified");
+		return (1);
+	}
+	return (0);
+}
+
+/*
+ * opts_dump --
+ *	List the current values of selected options.
+ *
+ * PUBLIC: void opts_dump __P((SCR *, enum optdisp));
+ */
+void
+opts_dump(sp, type)
+	SCR *sp;
+	enum optdisp type;
+{
+	OPTLIST const *op;
+	int base, b_num, cnt, col, colwidth, curlen, s_num;
+	int numcols, numrows, row;
+	int b_op[O_OPTIONCOUNT], s_op[O_OPTIONCOUNT];
+	char nbuf[20];
+
+	/*
+	 * Options are output in two groups -- those that fit in a column and
+	 * those that don't.  Output is done on 6 character "tab" boundaries
+	 * for no particular reason.  (Since we don't output tab characters,
+	 * we can ignore the terminal's tab settings.)  Ignore the user's tab
+	 * setting because we have no idea how reasonable it is.
+	 *
+	 * Find a column width we can live with, testing from 10 columns to 1.
+	 */
+	for (numcols = 10; numcols > 1; --numcols) {
+		colwidth = sp->cols / numcols & ~(STANDARD_TAB - 1);
+		if (colwidth >= 10) {
+			colwidth =
+			    (colwidth + STANDARD_TAB) & ~(STANDARD_TAB - 1);
+			numcols = sp->cols / colwidth;
+			break;
+		}
+		colwidth = 0;
+	}
+
+	/*
+	 * Get the set of options to list, entering them into
+	 * the column list or the overflow list.
+	 */
+	for (b_num = s_num = 0, op = optlist; op->name != NULL; ++op) {
+		cnt = op - optlist;
+
+		/* If OPT_NDISP set, it's never displayed. */
+		if (F_ISSET(op, OPT_NDISP))
+			continue;
+
+		switch (type) {
+		case ALL_DISPLAY:		/* Display all. */
+			break;
+		case CHANGED_DISPLAY:		/* Display changed. */
+			/* If OPT_ADISP set, it's always "changed". */
+			if (F_ISSET(op, OPT_ADISP))
+				break;
+			switch (op->type) {
+			case OPT_0BOOL:
+			case OPT_1BOOL:
+			case OPT_NUM:
+				if (O_VAL(sp, cnt) == O_D_VAL(sp, cnt))
+					continue;
+				break;
+			case OPT_STR:
+				if (O_STR(sp, cnt) == O_D_STR(sp, cnt) ||
+				    O_D_STR(sp, cnt) != NULL &&
+				    !strcmp(O_STR(sp, cnt), O_D_STR(sp, cnt)))
+					continue;
+				break;
+			}
+			break;
+		case SELECT_DISPLAY:		/* Display selected. */
+			if (!F_ISSET(&sp->opts[cnt], OPT_SELECTED))
+				continue;
+			break;
+		default:
+		case NO_DISPLAY:
+			abort();
+		}
+		F_CLR(&sp->opts[cnt], OPT_SELECTED);
+
+		curlen = strlen(op->name);
+		switch (op->type) {
+		case OPT_0BOOL:
+		case OPT_1BOOL:
+			if (!O_ISSET(sp, cnt))
+				curlen += 2;
+			break;
+		case OPT_NUM:
+			(void)snprintf(nbuf,
+			    sizeof(nbuf), "%ld", O_VAL(sp, cnt));
+			curlen += strlen(nbuf);
+			break;
+		case OPT_STR:
+			if (O_STR(sp, cnt) != NULL)
+				curlen += strlen(O_STR(sp, cnt));
+			curlen += 3;
+			break;
+		}
+		/* Offset by 2 so there's a gap. */
+		if (curlen <= colwidth - 2)
+			s_op[s_num++] = cnt;
+		else
+			b_op[b_num++] = cnt;
+	}
+
+	if (s_num > 0) {
+		/* Figure out the number of rows. */
+		if (s_num > numcols) {
+			numrows = s_num / numcols;
+			if (s_num % numcols)
+				++numrows;
+		} else
+			numrows = 1;
+
+		/* Display the options in sorted order. */
+		for (row = 0; row < numrows;) {
+			for (base = row, col = 0; col < numcols; ++col) {
+				cnt = opts_print(sp, &optlist[s_op[base]]);
+				if ((base += numrows) >= s_num)
+					break;
+				(void)ex_printf(sp, "%*s",
+				    (int)(colwidth - cnt), "");
+			}
+			if (++row < numrows || b_num)
+				(void)ex_puts(sp, "\n");
+		}
+	}
+
+	for (row = 0; row < b_num;) {
+		(void)opts_print(sp, &optlist[b_op[row]]);
+		if (++row < b_num)
+			(void)ex_puts(sp, "\n");
+	}
+	(void)ex_puts(sp, "\n");
+}
+
+/*
+ * opts_print --
+ *	Print out an option.
+ */
+static int
+opts_print(sp, op)
+	SCR *sp;
+	OPTLIST const *op;
+{
+	int curlen, offset;
+
+	curlen = 0;
+	offset = op - optlist;
+	switch (op->type) {
+	case OPT_0BOOL:
+	case OPT_1BOOL:
+		curlen += ex_printf(sp,
+		    "%s%s", O_ISSET(sp, offset) ? "" : "no", op->name);
+		break;
+	case OPT_NUM:
+		curlen += ex_printf(sp, "%s=%ld", op->name, O_VAL(sp, offset));
+		break;
+	case OPT_STR:
+		curlen += ex_printf(sp, "%s=\"%s\"", op->name,
+		    O_STR(sp, offset) == NULL ? "" : O_STR(sp, offset));
+		break;
+	}
+	return (curlen);
+}
+
+/*
+ * opts_save --
+ *	Write the current configuration to a file.
+ *
+ * PUBLIC: int opts_save __P((SCR *, FILE *));
+ */
+int
+opts_save(sp, fp)
+	SCR *sp;
+	FILE *fp;
+{
+	OPTLIST const *op;
+	int ch, cnt;
+	char *p;
+
+	for (op = optlist; op->name != NULL; ++op) {
+		if (F_ISSET(op, OPT_NOSAVE))
+			continue;
+		cnt = op - optlist;
+		switch (op->type) {
+		case OPT_0BOOL:
+		case OPT_1BOOL:
+			if (O_ISSET(sp, cnt))
+				(void)fprintf(fp, "set %s\n", op->name);
+			else
+				(void)fprintf(fp, "set no%s\n", op->name);
+			break;
+		case OPT_NUM:
+			(void)fprintf(fp,
+			    "set %s=%-3ld\n", op->name, O_VAL(sp, cnt));
+			break;
+		case OPT_STR:
+			if (O_STR(sp, cnt) == NULL)
+				break;
+			(void)fprintf(fp, "set ");
+			for (p = op->name; (ch = *p) != '\0'; ++p) {
+				if (isblank(ch) || ch == '\\')
+					(void)putc('\\', fp);
+				(void)putc(ch, fp);
+			}
+			(void)putc('=', fp);
+			for (p = O_STR(sp, cnt); (ch = *p) != '\0'; ++p) {
+				if (isblank(ch) || ch == '\\')
+					(void)putc('\\', fp);
+				(void)putc(ch, fp);
+			}
+			(void)putc('\n', fp);
+			break;
+		}
+		if (ferror(fp)) {
+			msgq(sp, M_SYSERR, NULL);
+			return (1);
+		}
+	}
+	return (0);
+}
+
+/* 
+ * opts_search --
+ *	Search for an option.
+ *
+ * PUBLIC: OPTLIST const *opts_search __P((char *));
+ */
+OPTLIST const *
+opts_search(name)
+	char *name;
+{
+	OPTLIST const *op, *found;
+	OABBREV atmp, *ap;
+	OPTLIST otmp;
+	size_t len;
+
+	/* Check list of abbreviations. */
+	atmp.name = name;
+	if ((ap = bsearch(&atmp, abbrev, sizeof(abbrev) / sizeof(OABBREV) - 1,
+	    sizeof(OABBREV), opts_abbcmp)) != NULL)
+		return (optlist + ap->offset);
+
+	/* Check list of options. */
+	otmp.name = name;
+	if ((op = bsearch(&otmp, optlist, sizeof(optlist) / sizeof(OPTLIST) - 1,
+	    sizeof(OPTLIST), opts_cmp)) != NULL)
+		return (op);
+		
+	/*
+	 * Check to see if the name is the prefix of one (and only one)
+	 * option.  If so, return the option.
+	 */
+	len = strlen(name);
+	for (found = NULL, op = optlist; op->name != NULL; ++op) {
+		if (op->name[0] < name[0])
+			continue;
+		if (op->name[0] > name[0])
+			break;
+		if (!memcmp(op->name, name, len)) {
+			if (found != NULL)
+				return (NULL);
+			found = op;
+		}
+	}
+	return (found);
+}
+
+/* 
+ * opts_nomatch --
+ *	Standard nomatch error message for options.
+ *
+ * PUBLIC: void opts_nomatch __P((SCR *, char *));
+ */
+void
+opts_nomatch(sp, name)
+	SCR *sp;
+	char *name;
+{
+	msgq_str(sp, M_ERR, name,
+	    "033|set: no %s option: 'set all' gives all option values");
+}
+
+static int
+opts_abbcmp(a, b)
+        const void *a, *b;
+{
+        return(strcmp(((OABBREV *)a)->name, ((OABBREV *)b)->name));
+}
+
+static int
+opts_cmp(a, b)
+        const void *a, *b;
+{
+        return(strcmp(((OPTLIST *)a)->name, ((OPTLIST *)b)->name));
+}
+
+/*
+ * opts_copy --
+ *	Copy a screen's OPTION array.
+ *
+ * PUBLIC: int opts_copy __P((SCR *, SCR *));
+ */
+int
+opts_copy(orig, sp)
+	SCR *orig, *sp;
+{
+	int cnt, rval;
+
+	/* Copy most everything without change. */
+	memcpy(sp->opts, orig->opts, sizeof(orig->opts));
+
+	/* Copy the string edit options. */
+	for (cnt = rval = 0; cnt < O_OPTIONCOUNT; ++cnt) {
+		if (optlist[cnt].type != OPT_STR ||
+		    F_ISSET(&optlist[cnt], OPT_GLOBAL))
+			continue;
+		/*
+		 * If never set, or already failed, NULL out the entries --
+		 * have to continue after failure, otherwise would have two
+		 * screens referencing the same memory.
+		 */
+		if (rval || O_STR(sp, cnt) == NULL) {
+			o_set(sp, cnt, OS_NOFREE | OS_STR, NULL, 0);
+			o_set(sp, cnt, OS_DEF | OS_NOFREE | OS_STR, NULL, 0);
+			continue;
+		}
+
+		/* Copy the current string. */
+		if (o_set(sp, cnt, OS_NOFREE | OS_STRDUP, O_STR(sp, cnt), 0)) {
+			o_set(sp, cnt, OS_DEF | OS_NOFREE | OS_STR, NULL, 0);
+			goto nomem;
+		}
+
+		/* Copy the default string. */
+		if (O_D_STR(sp, cnt) != NULL && o_set(sp, cnt,
+		    OS_DEF | OS_NOFREE | OS_STRDUP, O_D_STR(sp, cnt), 0)) {
+nomem:			msgq(orig, M_SYSERR, NULL);
+			rval = 1;
+		}
+	}
+	return (rval);
+}
+
+/*
+ * opts_free --
+ *	Free all option strings
+ *
+ * PUBLIC: void opts_free __P((SCR *));
+ */
+void
+opts_free(sp)
+	SCR *sp;
+{
+	int cnt;
+
+	for (cnt = 0; cnt < O_OPTIONCOUNT; ++cnt) {
+		if (optlist[cnt].type != OPT_STR ||
+		    F_ISSET(&optlist[cnt], OPT_GLOBAL))
+			continue;
+		if (O_STR(sp, cnt) != NULL)
+			free(O_STR(sp, cnt));
+		if (O_D_STR(sp, cnt) != NULL)
+			free(O_D_STR(sp, cnt));
+	}
+}