===================================================================
RCS file: /cvs/mandoc/Attic/apropos.c,v
retrieving revision 1.14
retrieving revision 1.16
diff -u -p -r1.14 -r1.16
--- mandoc/Attic/apropos.c	2011/11/18 07:02:19	1.14
+++ mandoc/Attic/apropos.c	2011/11/20 16:29:50	1.16
@@ -1,6 +1,7 @@
-/*	$Id: apropos.c,v 1.14 2011/11/18 07:02:19 kristaps Exp $ */
+/*	$Id: apropos.c,v 1.16 2011/11/20 16:29:50 kristaps Exp $ */
 /*
  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -28,8 +29,18 @@
 #include "apropos_db.h"
 #include "mandoc.h"
 
+/*
+ * List of paths to be searched for manual databases.
+ */
+struct	manpaths {
+	int	  sz;
+	char	**paths;
+};
+
 static	int	 cmp(const void *, const void *);
 static	void	 list(struct res *, size_t, void *);
+static	void	 manpath_add(struct manpaths *, const char *);
+static	void	 manpath_parse(struct manpaths *, char *);
 static	void	 usage(void);
 
 static	char	*progname;
@@ -37,23 +48,31 @@ static	char	*progname;
 int
 main(int argc, char *argv[])
 {
-	int		 ch;
+	int		 i, ch, rc;
+	struct manpaths	 paths;
 	size_t		 terms;
 	struct opts	 opts;
 	struct expr	*e;
 	extern int	 optind;
 	extern char	*optarg;
 
-	memset(&opts, 0, sizeof(struct opts));
-
 	progname = strrchr(argv[0], '/');
 	if (progname == NULL)
 		progname = argv[0];
 	else
 		++progname;
 
-	while (-1 != (ch = getopt(argc, argv, "S:s:"))) 
+	memset(&paths, 0, sizeof(struct manpaths));
+	memset(&opts, 0, sizeof(struct opts));
+
+	e = NULL;
+	rc = 0;
+
+	while (-1 != (ch = getopt(argc, argv, "m:S:s:"))) 
 		switch (ch) {
+		case ('m'):
+			manpath_parse(&paths, optarg);
+			break;
 		case ('S'):
 			opts.arch = optarg;
 			break;
@@ -62,32 +81,47 @@ main(int argc, char *argv[])
 			break;
 		default:
 			usage();
-			return(EXIT_FAILURE);
+			goto out;
 		}
 
 	argc -= optind;
 	argv += optind;
 
-	if (0 == argc) 
-		return(EXIT_SUCCESS);
-
-	if (NULL == (e = exprcomp(argc, argv, &terms))) {
-		fprintf(stderr, "Bad expression\n");
-		return(EXIT_FAILURE);
+	if (0 == argc) {
+		rc = 1;
+		goto out;
 	}
 
 	/*
-	 * Configure databases.
-	 * The keyword database is a btree that allows for duplicate
-	 * entries.
-	 * The index database is a recno.
+	 * Let MANPATH override our default paths.
 	 */
 
-	ch = apropos_search(&opts, e, terms, NULL, list);
+	if (NULL != getenv("MANPATH"))
+		manpath_add(&paths, getenv("MANPATH"));
+	else
+		manpath_add(&paths, ".");
+
+	if (NULL == (e = exprcomp(argc, argv, &terms))) {
+		fprintf(stderr, "%s: Bad expression\n", progname);
+		goto out;
+	}
+
+	rc = apropos_search
+		(paths.sz, paths.paths, 
+		 &opts, e, terms, NULL, list);
+
+	if (0 == rc) 
+		fprintf(stderr, "%s: Error reading "
+				"manual database\n", progname);
+
+out:
+	for (i = 0; i < paths.sz; i++)
+		free(paths.paths[i]);
+
+	free(paths.paths);
 	exprfree(e);
-	if (0 == ch)
-		fprintf(stderr, "%s: Database error\n", progname);
-	return(ch ? EXIT_SUCCESS : EXIT_FAILURE);
+
+	return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
 }
 
 /* ARGSUSED */
@@ -118,6 +152,41 @@ static void
 usage(void)
 {
 
-	fprintf(stderr, "usage: %s [-S arch] [-s section] "
+	fprintf(stderr, "usage: %s "
+			"[-m dirs] "
+			"[-S arch] "
+			"[-s section] "
 			"expression...\n", progname);
+}
+
+/*
+ * Parse a FULL pathname from a colon-separated list of arrays.
+ */
+static void
+manpath_parse(struct manpaths *dirs, char *path) 
+{
+	char	*dir;
+
+	for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
+		manpath_add(dirs, dir);
+}
+
+/*
+ * Add a directory to the array, ignoring bad directories.
+ * Grow the array one-by-one for simplicity's sake.
+ */
+static void
+manpath_add(struct manpaths *dirs, const char *dir) 
+{
+	char		 buf[PATH_MAX];
+	char		*cp;
+
+	if (NULL == (cp = realpath(dir, buf)))
+		return;
+
+	dirs->paths = mandoc_realloc
+		(dirs->paths, 
+		 ((size_t)dirs->sz + 1) * sizeof(char *));
+
+	dirs->paths[dirs->sz++] = mandoc_strdup(cp);
 }