Replace the symlink configuration scheme with a simple yacc parser as

found in other places of the tree.  Remove sticky and font commandline
options and add another one for alternative config locations.
Split off cwmrc(5) from cwm(1), nuke #ifdef __OpenBSD__ while there.

tested by various kind people, feedback from oga@ and okan@ - thanks!
ok oga@, jasper@, okan@

1 files changed, 583 insertions, 0 deletions

diff --git a/parse.y b/parse.y
new file mode 100644
index 0000000..c87d475
--- /dev/null
+++ b/parse.y
@@ -0,0 +1,583 @@
+/*	$OpenBSD: parse.y,v 1.1 2008/03/23 15:09:21 simon Exp $ */
+
+/*
+ * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
+ * Copyright (c) 2001 Markus Friedl.  All rights reserved.
+ * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
+ * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+%{
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "headers.h"
+#include "calmwm.h"
+
+TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
+static struct file {
+	TAILQ_ENTRY(file)	 entry;
+	FILE			*stream;
+	char			*name;
+	int			 lineno;
+	int			 errors;
+} *file;
+struct file	*pushfile(const char *);
+int		 popfile(void);
+int		 yyparse(void);
+int		 yylex(void);
+int		 yyerror(const char *, ...);
+int		 kw_cmp(const void *, const void *);
+int		 lookup(char *);
+int		 lgetc(int);
+int		 lungetc(int);
+int		 findeol(void);
+
+static struct conf	*conf;
+
+extern char		*shortcut_to_name[];
+
+typedef struct {
+	union {
+		int64_t			 number;
+		char			*string;
+	} v;
+	int lineno;
+} YYSTYPE;
+
+%}
+
+%token	FONTNAME STICKY
+%token	AUTOGROUP BIND COMMAND IGNORE
+%token	YES NO
+%token	ERROR
+%token	<v.string>		STRING
+%token	<v.number>		NUMBER
+%type	<v.number>		yesno
+%type	<v.string>		string
+%%
+
+grammar		: /* empty */
+		| grammar '\n'
+		| grammar main '\n'
+		| grammar error '\n'		{ file->errors++; }
+		;
+
+string		: string STRING			{
+			if (asprintf(&$$, "%s %s", $1, $2) == -1) {
+				free($1);
+				free($2);
+				yyerror("string: asprintf");
+				YYERROR;
+			}
+			free($1);
+			free($2);
+		}
+		| STRING
+		;
+
+yesno		: YES				{ $$ = 1; }
+		| NO				{ $$ = 0; }
+		;
+  
+main		: FONTNAME STRING		{
+			if (conf->DefaultFontName != NULL &&
+			    conf->DefaultFontName != DEFAULTFONTNAME)
+				free(conf->DefaultFontName);
+			if ((conf->DefaultFontName = xstrdup($2)) == NULL) {
+				free($2);
+				yyerror("string: asprintf");
+				YYERROR;
+			}
+			free($2);
+		}
+		| STICKY yesno {
+			if ($2 == 0)
+				conf->flags &= ~CONF_STICKY_GROUPS;
+			else
+				conf->flags |= CONF_STICKY_GROUPS;
+		}
+		| COMMAND STRING string		{
+			conf_cmd_add(conf, $3, $2, 0);
+			free($2);
+			free($3);
+		}
+		| AUTOGROUP NUMBER STRING	{
+			struct autogroupwin *aw;
+			char *p;
+
+			if ($2 < 1 || $2 > 9) {
+				free($3);
+				yyerror("autogroup number out of range: %d", $2);
+				YYERROR;
+			}
+
+			XCALLOC(aw, struct autogroupwin);
+
+			if ((p = strchr($3, ',')) == NULL) {
+				aw->name = NULL;
+				aw->class = xstrdup($3);
+			} else {
+				*(p++) = '\0';
+				aw->name = xstrdup($3);
+				aw->class = xstrdup(p);
+			}
+			aw->group = xstrdup(shortcut_to_name[$2]);
+
+			TAILQ_INSERT_TAIL(&conf->autogroupq, aw, entry);
+
+			free($3);
+		}
+		| IGNORE STRING {
+			struct winmatch	*wm;
+
+			XCALLOC(wm, struct winmatch);
+			strlcpy(wm->title, $2, sizeof(wm->title));
+			wm->opts |= CONF_IGNORECASE;
+			TAILQ_INSERT_TAIL(&conf->ignoreq, wm, entry);
+
+			free($2);
+		}
+		| BIND STRING string		{
+			conf_bindname(conf, $2, $3);
+			free($2);
+			free($3);
+		}
+		;
+
+%%
+
+struct keywords {
+	const char	*k_name;
+	int		 k_val;
+};
+
+int
+yyerror(const char *fmt, ...)
+{
+	va_list          ap;
+                         
+	file->errors++;         
+	va_start(ap, fmt);
+	fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	return (0);
+}
+
+int
+kw_cmp(const void *k, const void *e)
+{
+	return (strcmp(k, ((const struct keywords *)e)->k_name));
+}
+
+int
+lookup(char *s)
+{
+	/* this has to be sorted always */
+	static const struct keywords keywords[] = {
+		{ "autogroup",		AUTOGROUP},
+		{ "bind",		BIND},
+		{ "command",		COMMAND},
+		{ "fontname",		FONTNAME},
+		{ "ignore",		IGNORE},
+		{ "no",			NO},
+		{ "sticky",		STICKY},
+		{ "yes",		YES}
+	};
+	const struct keywords	*p;
+
+	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
+	    sizeof(keywords[0]), kw_cmp);
+
+	if (p)
+		return (p->k_val);
+	else
+		return (STRING);
+}
+
+#define MAXPUSHBACK	128
+
+char	*parsebuf;
+int	 parseindex;
+char	 pushback_buffer[MAXPUSHBACK];
+int	 pushback_index = 0;
+
+int
+lgetc(int quotec)
+{
+	int		c, next;
+
+	if (parsebuf) {
+		/* Read character from the parsebuffer instead of input. */
+		if (parseindex >= 0) {
+			c = parsebuf[parseindex++];
+			if (c != '\0')
+				return (c);
+			parsebuf = NULL;
+		} else
+			parseindex++;
+	}
+
+	if (pushback_index)
+		return (pushback_buffer[--pushback_index]);
+
+	if (quotec) {
+		if ((c = getc(file->stream)) == EOF) {
+			yyerror("reached end of file while parsing quoted string");
+			if (popfile() == EOF)
+				return (EOF);
+			return (quotec);
+		}
+		return (c);
+	}
+
+	while ((c = getc(file->stream)) == '\\') {
+		next = getc(file->stream);
+		if (next != '\n') {
+			c = next;
+			break;
+		}
+		yylval.lineno = file->lineno;
+		file->lineno++;
+	}
+
+	while (c == EOF) {
+		if (popfile() == EOF)
+			return (EOF);
+		c = getc(file->stream);
+	}
+	return (c);
+}
+
+int
+lungetc(int c)
+{
+	if (c == EOF)
+		return (EOF);
+	if (parsebuf) {
+		parseindex--;
+		if (parseindex >= 0)
+			return (c);
+	}
+	if (pushback_index < MAXPUSHBACK-1)
+		return (pushback_buffer[pushback_index++] = c);
+	else
+		return (EOF);
+}
+
+int
+findeol(void)
+{
+	int	c;
+
+	parsebuf = NULL;
+	pushback_index = 0;
+
+	/* skip to either EOF or the first real EOL */
+	while (1) {
+		c = lgetc(0);
+		if (c == '\n') {
+			file->lineno++;
+			break;
+		}
+		if (c == EOF)
+			break;
+	}
+	return (ERROR);
+}
+
+int
+yylex(void)
+{
+	char	 buf[8096];
+	char	*p;
+	int	 quotec, next, c;
+	int	 token;
+
+	p = buf;
+	while ((c = lgetc(0)) == ' ' || c == '\t')
+		; /* nothing */
+
+	yylval.lineno = file->lineno;
+	if (c == '#')
+		while ((c = lgetc(0)) != '\n' && c != EOF)
+			; /* nothing */
+
+	switch (c) {
+	case '\'':
+	case '"':
+		quotec = c;
+		while (1) {
+			if ((c = lgetc(quotec)) == EOF)
+				return (0);
+			if (c == '\n') {
+				file->lineno++;
+				continue;
+			} else if (c == '\\') {
+				if ((next = lgetc(quotec)) == EOF)
+					return (0);
+				if (next == quotec || c == ' ' || c == '\t')
+					c = next;
+				else if (next == '\n')
+					continue;
+				else
+					lungetc(next);
+			} else if (c == quotec) {
+				*p = '\0';
+				break;
+			}
+			if (p + 1 >= buf + sizeof(buf) - 1) {
+				yyerror("string too long");
+				return (findeol());
+			}
+			*p++ = (char)c;
+		}
+		yylval.v.string = strdup(buf);
+		if (yylval.v.string == NULL)
+			err(1, "yylex: strdup");
+		return (STRING);
+	}
+
+#define allowed_to_end_number(x) \
+	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
+
+	if (c == '-' || isdigit(c)) {
+		do {
+			*p++ = c;
+			if ((unsigned)(p-buf) >= sizeof(buf)) {
+				yyerror("string too long");
+				return (findeol());
+			}
+		} while ((c = lgetc(0)) != EOF && isdigit(c));
+		lungetc(c);
+		if (p == buf + 1 && buf[0] == '-')
+			goto nodigits;
+		if (c == EOF || allowed_to_end_number(c)) {
+			const char *errstr = NULL;
+
+			*p = '\0';
+			yylval.v.number = strtonum(buf, LLONG_MIN,
+			    LLONG_MAX, &errstr);
+			if (errstr) {
+				yyerror("\"%s\" invalid number: %s",
+				    buf, errstr);
+				return (findeol());
+			}
+			return (NUMBER);
+		} else {
+nodigits:
+			while (p > buf + 1)
+				lungetc(*--p);
+			c = *--p;
+			if (c == '-')
+				return (c);
+		}
+	}
+
+#define allowed_in_string(x) \
+	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
+	x != '{' && x != '}' && x != '<' && x != '>' && \
+	x != '!' && x != '=' && x != '/' && x != '#' && \
+	x != ','))
+
+	if (isalnum(c) || c == ':' || c == '_' || c == '*') {
+		do {
+			*p++ = c;
+			if ((unsigned)(p-buf) >= sizeof(buf)) {
+				yyerror("string too long");
+				return (findeol());
+			}
+		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
+		lungetc(c);
+		*p = '\0';
+		if ((token = lookup(buf)) == STRING)
+			if ((yylval.v.string = strdup(buf)) == NULL)
+				err(1, "yylex: strdup");
+		return (token);
+	}
+	if (c == '\n') {
+		yylval.lineno = file->lineno;
+		file->lineno++;
+	}
+	if (c == EOF)
+		return (0);
+	return (c);
+}
+
+struct file *
+pushfile(const char *name)
+{
+	struct file	*nfile;
+
+	if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
+	    (nfile->name = strdup(name)) == NULL) {
+		warn("malloc");
+		return (NULL);
+	}
+	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
+		warn("%s", nfile->name);
+		free(nfile->name);
+		free(nfile);
+		return (NULL);
+	}
+	nfile->lineno = 1;
+	TAILQ_INSERT_TAIL(&files, nfile, entry);
+	return (nfile);
+}
+
+int
+popfile(void)
+{
+	struct file	*prev;
+
+	if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
+		prev->errors += file->errors;
+		TAILQ_REMOVE(&files, file, entry);
+		fclose(file->stream);
+		free(file->name);
+		free(file);
+		file = prev;
+		return (0);
+	}
+	return (EOF);
+}
+
+void
+conf_clear(struct conf *c)
+{
+	struct autogroupwin	*ag, *agnext;
+	struct keybinding	*kb, *kbnext;
+	struct winmatch		*wm, *wmnext;
+	struct cmd		*cmd, *cmdnext;
+
+	for (cmd = TAILQ_FIRST(&c->cmdq); cmd != NULL; cmd = cmdnext) {
+		cmdnext = TAILQ_NEXT(cmd, entry);
+
+		TAILQ_REMOVE(&c->cmdq, cmd, entry);
+		free(cmd);
+	}
+
+	for (kb = TAILQ_FIRST(&c->keybindingq); kb != NULL; kb = kbnext) {
+		kbnext = TAILQ_NEXT(kb, entry);
+
+		TAILQ_REMOVE(&c->keybindingq, kb, entry);
+		free(kb);
+	}
+
+	for (ag = TAILQ_FIRST(&c->autogroupq); ag != NULL; ag = agnext) {
+		agnext = TAILQ_NEXT(ag, entry);
+
+		TAILQ_REMOVE(&c->autogroupq, ag, entry);
+		free(ag->class);
+		if (ag->name)
+			free(ag->name);
+		free(ag->group);
+		free(ag);
+	}
+
+	for (wm = TAILQ_FIRST(&c->ignoreq); wm != NULL; wm = wmnext) {
+		wmnext = TAILQ_NEXT(wm, entry);
+
+		TAILQ_REMOVE(&c->ignoreq, wm, entry);
+		free(wm);
+	}
+
+	if (c->DefaultFontName != NULL &&
+	    c->DefaultFontName != DEFAULTFONTNAME)
+		free(c->DefaultFontName);
+}
+
+
+int
+parse_config(const char *filename, struct conf *xconf)
+{
+	int			 errors = 0;
+
+	if ((conf = malloc(sizeof(struct conf))) == NULL)
+		return (-1);
+
+	if ((file = pushfile(filename)) == NULL) {
+		free(conf);
+		return (-1);
+	}
+
+	strlcpy(conf->conf_path, filename, sizeof(conf->conf_path));
+
+	conf_init(conf);
+
+	yyparse();
+	errors = file->errors;
+	file->errors = 0;
+	popfile();
+
+	if (errors) {
+		conf_clear(conf);
+	}
+	else {
+		struct autogroupwin	*ag, *agnext;
+		struct keybinding	*kb, *kbnext;
+		struct winmatch		*wm, *wmnext;
+		struct cmd		*cmd, *cmdnext;
+
+		conf_clear(xconf);
+
+		xconf->flags = conf->flags;
+
+		for (cmd = TAILQ_FIRST(&conf->cmdq); cmd != NULL; cmd = cmdnext) {
+			cmdnext = TAILQ_NEXT(cmd, entry);
+
+			TAILQ_REMOVE(&conf->cmdq, cmd, entry);
+			TAILQ_INSERT_TAIL(&xconf->cmdq, cmd, entry);
+		}
+
+		for (kb = TAILQ_FIRST(&conf->keybindingq); kb != NULL; kb = kbnext) {
+			kbnext = TAILQ_NEXT(kb, entry);
+
+			TAILQ_REMOVE(&conf->keybindingq, kb, entry);
+			TAILQ_INSERT_TAIL(&xconf->keybindingq, kb, entry);
+		}
+
+		for (ag = TAILQ_FIRST(&conf->autogroupq); ag != NULL; ag = agnext) {
+			agnext = TAILQ_NEXT(ag, entry);
+
+			TAILQ_REMOVE(&conf->autogroupq, ag, entry);
+			TAILQ_INSERT_TAIL(&xconf->autogroupq, ag, entry);
+		}
+
+		for (wm = TAILQ_FIRST(&conf->ignoreq); wm != NULL; wm = wmnext) {
+			wmnext = TAILQ_NEXT(wm, entry);
+
+			TAILQ_REMOVE(&conf->ignoreq, wm, entry);
+			TAILQ_INSERT_TAIL(&xconf->ignoreq, wm, entry);
+		}
+
+		strlcpy(xconf->termpath, conf->termpath, sizeof(xconf->termpath));
+		strlcpy(xconf->lockpath, conf->lockpath, sizeof(xconf->lockpath));
+
+		xconf->DefaultFontName = conf->DefaultFontName;
+	}
+
+	free(conf);
+
+	return (errors ? -1 : 0);
+}