initial population

1 files changed, 272 insertions, 0 deletions

diff --git a/usr.bin/man/manconf.c b/usr.bin/man/manconf.c
new file mode 100644
index 0000000..f12d031
--- /dev/null
+++ b/usr.bin/man/manconf.c
@@ -0,0 +1,272 @@
+/*	$NetBSD: manconf.c,v 1.8 2014/02/17 02:53:48 uwe Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993, 1995
+ *	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. 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.
+ */
+
+/*
+ * manconf.c: provides interface for reading man.conf files
+ *
+ * note that this code is shared across all programs that read man.conf.
+ * (currently: apropos, catman, makewhatis, man, and whatis...)
+ */
+
+#if HAVE_NBTOOL_CONFIG_H
+#include "nbtool_config.h"
+#endif
+
+#include <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)config.c	8.8 (Berkeley) 1/31/95";
+#else
+__RCSID("$NetBSD: manconf.c,v 1.8 2014/02/17 02:53:48 uwe Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "manconf.h"
+#include "pathnames.h"
+
+TAILQ_HEAD(_head, _tag);
+static struct _head head;	/* 'head' -- top level data structure */
+
+/*
+ * xstrdup: like strdup, but also returns length of string in lenp
+ */
+static char *
+xstrdup(const char *str, size_t *lenp)
+{
+	size_t len;
+	char *copy;
+
+	len = strlen(str) + 1;
+	copy = malloc(len);
+	if (!copy)
+		return NULL;
+	(void)memcpy(copy, str, len);
+	if (lenp)
+		*lenp = len - 1;	/* subtract out the null */
+	return copy;
+}
+
+/*
+ * config --
+ *
+ * Read the configuration file and build a doubly linked
+ * list off of "head" that looks like:
+ *
+ *	tag1 <-> entry <-> entry <-> entry
+ *	|
+ *	tag2 <-> entry <-> entry <-> entry
+ *
+ * note: will err/errx out on error (fopen or malloc failure)
+ */
+void
+config(const char *fname)
+{
+	TAG *tp;
+	FILE *cfp;
+	size_t len;
+	int lcnt;
+	char *p, *t, type;
+
+	if (fname == NULL)
+		fname = _PATH_MANCONF;
+	if ((cfp = fopen(fname, "r")) == NULL)
+		err(EXIT_FAILURE, "%s", fname);
+	TAILQ_INIT(&head);
+	for (lcnt = 1; (p = fgetln(cfp, &len)) != NULL; ++lcnt) {
+		if (len == 1)			/* Skip empty lines. */
+			continue;
+		if (p[len - 1] != '\n') {	/* Skip corrupted lines. */
+			warnx("%s: line %d corrupted", fname, lcnt);
+			continue;
+		}
+		p[len - 1] = '\0';		/* Terminate the line. */
+
+						/* Skip leading space. */
+		for (/*EMPTY*/; *p != '\0' && isspace((unsigned char)*p); ++p)
+			continue;
+						/* Skip empty/comment lines. */
+		if (*p == '\0' || *p == '#')
+			continue;
+						/* Find first token. */
+		for (t = p; *t && !isspace((unsigned char)*t); ++t)
+			continue;
+		if (*t == '\0')			/* Need more than one token.*/
+			continue;
+		*t = '\0';
+
+		tp = gettag(p, 1);
+		if (!tp)
+			errx(EXIT_FAILURE, "gettag: malloc failed");
+
+		/*
+		 * Attach new records. Check to see if it is a
+		 * section record or not.
+		 */
+
+		if (*p == '_') {		/* not a section record */
+			/*
+			 * Special cases: _build and _crunch take the
+			 * rest of the line as a single entry.
+			 */
+			if (!strcmp(p, "_build") || !strcmp(p, "_crunch")) {
+				const char *u;
+
+				/*
+				 * The reason we're not just using
+				 * strtok(3) for all of the parsing is
+				 * so we don't get caught if a line
+				 * has only a single token on it.
+				 */
+				while (*++t && isspace((unsigned char)*t));
+#ifndef HAVE_NBTOOL_CONFIG_H
+				/* pre-verify user-supplied command format */
+				u = t;
+				while (*u && !isspace((unsigned char)*u))
+					++u;
+				while (*u && isspace((unsigned char)*u))
+					++u;
+				if (fmtcheck(u, "%s") != u) {
+					warnx("%s:%d: invalid %s command ignored",
+					      fname, lcnt, p);
+					continue;
+				}
+#endif	/* !HAVE_NBTOOL_CONFIG_H */
+				if (addentry(tp, t, 0) == -1)
+					errx(EXIT_FAILURE,
+					    "addentry: malloc failed");
+			} else {
+				for (++t; (p = strtok(t, " \t\n")) != NULL;
+				     t = NULL) {
+					if (addentry(tp, p, 0) == -1)
+						errx(EXIT_FAILURE,
+						   "addentry: malloc failed");
+				}
+			}
+
+		} else {			/* section record */
+
+			/*
+			 * section entries can either be all absolute
+			 * paths or all relative paths, but not both.
+			 */
+			type = (char)((TAILQ_FIRST(&tp->entrylist) != NULL) ?
+			    *(TAILQ_FIRST(&tp->entrylist)->s) : '\0');
+
+			for (++t; (p = strtok(t, " \t\n")) != NULL; t = NULL) {
+
+				/* ensure an assigned type */
+				if (type == 0)
+					type = *p;
+
+				/* check for illegal mix */
+				if (*p != type) {
+	warnx("section %s: %s: invalid entry, does not match previous types",
+	      tp->s, p);
+	warnx("man.conf cannot mix absolute and relative paths in an entry");
+					continue;
+				}
+				if (addentry(tp, p, 0) == -1)
+					errx(EXIT_FAILURE,
+					    "addentry: malloc failed");
+			}
+		}
+	}
+	(void)fclose(cfp);
+}
+
+/*
+ * gettag --
+ *	if (!create) return tag for given name if it exists, or NULL otherwise
+ *
+ *	if (create) return tag for given name if it exists, try and create
+ *	a new tag if it does not exist.  return NULL if unable to create new
+ *	tag.
+ */
+TAG *
+gettag(const char *name, int create)
+{
+	TAG *tp;
+
+	TAILQ_FOREACH(tp, &head, q)
+		if (!strcmp(name, tp->s))
+			return tp;
+	if (!create)
+		return NULL;
+
+	/* try and add it in */
+	tp = malloc(sizeof(*tp));
+	if (tp)
+		tp->s = xstrdup(name, &tp->len);
+	if (!tp || !tp->s) {
+		if (tp)
+			free(tp);
+		return NULL;
+	}
+	TAILQ_INIT(&tp->entrylist);
+	TAILQ_INSERT_TAIL(&head, tp, q);
+	return tp;
+}
+
+/*
+ * addentry --
+ *	add an entry to a list.
+ *	returns -1 if malloc failed, otherwise 0.
+ */
+int
+addentry(TAG *tp, const char *newent, int ishead)
+{
+	ENTRY *ep;
+
+	ep = malloc(sizeof(*ep));
+	if (ep)
+		ep->s = xstrdup(newent, &ep->len);
+	if (!ep || !ep->s) {
+		if (ep)
+			free(ep);
+		return -1;
+	}
+	if (ishead)
+		TAILQ_INSERT_HEAD(&tp->entrylist, ep, q);
+	else
+		TAILQ_INSERT_TAIL(&tp->entrylist, ep, q);
+
+	return 0;
+}