Flip apropos to use mansearch instead of apropos_db.

This makes the utility much smaller and simpler.
A lot of functionality has been omitted while the sqlite3 search routines
improve (logical operations, etc.).
It still needs work to make the output more conventional.
Also add the manpage utility, which I use extensively as a mind-meld of
apropos and man.

1 files changed, 31 insertions, 166 deletions

diff --git a/apropos.c b/apropos.c
index 2f1f90b1..1fd3a528 100644
--- a/apropos.c
+++ b/apropos.c
@@ -1,7 +1,6 @@
 /*	$Id$ */
 /*
- * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -27,38 +26,21 @@
 #include <string.h>
 #include <unistd.h>
 
-#include "apropos_db.h"
-#include "mandoc.h"
 #include "manpath.h"
-
-#define	SINGLETON(_res, _sz) \
-	((_sz) && (_res)[0].matched && \
-	 (1 == (_sz) || 0 == (_res)[1].matched))
-#define	EMPTYSET(_res, _sz) \
-	((0 == (_sz)) || 0 == (_res)[0].matched)
-
-static	int	 cmp(const void *, const void *);
-static	void	 list(struct res *, size_t, void *);
-static	void	 usage(void);
-
-static	char	*progname;
+#include "mansearch.h"
 
 int
 main(int argc, char *argv[])
 {
-	int		 ch, rc, whatis, usecat;
-	struct res	*res;
+	int		 ch;
+	size_t		 i, sz;
+	struct manpage	*res;
+	char		*conf_file, *defpaths, *auxpaths,
+			*arch, *sec;
 	struct manpaths	 paths;
-	const char	*prog;
-	pid_t		 pid;
-	char		 path[PATH_MAX];
-	int		 fds[2];
-	size_t		 terms, ressz, sz;
-	struct opts	 opts;
-	struct expr	*e;
-	char		*defpaths, *auxpaths, *conf_file, *cp;
-	extern int	 optind;
+	char		*progname;
 	extern char	*optarg;
+	extern int	 optind;
 
 	progname = strrchr(argv[0], '/');
 	if (progname == NULL)
@@ -66,18 +48,8 @@ main(int argc, char *argv[])
 	else
 		++progname;
 
-	whatis = 0 == strncmp(progname, "whatis", 6);
-
+	auxpaths = defpaths = conf_file = arch = sec = NULL;
 	memset(&paths, 0, sizeof(struct manpaths));
-	memset(&opts, 0, sizeof(struct opts));
-
-	usecat = 0;
-	ressz = 0;
-	res = NULL;
-	auxpaths = defpaths = NULL;
-	conf_file = NULL;
-	e = NULL;
-	path[0] = '\0';
 
 	while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:")))
 		switch (ch) {
@@ -91,149 +63,42 @@ main(int argc, char *argv[])
 			auxpaths = optarg;
 			break;
 		case ('S'):
-			opts.arch = optarg;
+			arch = optarg;
 			break;
 		case ('s'):
-			opts.cat = optarg;
+			sec = optarg;
 			break;
 		default:
-			usage();
-			return(EXIT_FAILURE);
+			goto usage;
 		}
 
 	argc -= optind;
 	argv += optind;
 
-	if (0 == argc) 
-		return(EXIT_SUCCESS);
-
-	rc = 0;
+	if (0 == argc)
+		goto usage;
 
 	manpath_parse(&paths, conf_file, defpaths, auxpaths);
-
-	e = whatis ? termcomp(argc, argv, &terms) :
-		     exprcomp(argc, argv, &terms);
-		
-	if (NULL == e) {
-		fprintf(stderr, "%s: Bad expression\n", progname);
-		goto out;
-	}
-
-	rc = apropos_search
-		(paths.sz, paths.paths, &opts, 
-		 e, terms, NULL, &ressz, &res, list);
-
-	terms = 1;
-
-	if (0 == rc) {
-		fprintf(stderr, "%s: Bad database\n", progname);
-		goto out;
-	} else if ( ! isatty(STDOUT_FILENO) || EMPTYSET(res, ressz))
-		goto out;
-
-	if ( ! SINGLETON(res, ressz)) {
-		printf("Which manpage would you like [1]? ");
-		fflush(stdout);
-		if (NULL != (cp = fgetln(stdin, &sz)) && 
-				sz > 1 && '\n' == cp[--sz]) {
-			if ((ch = atoi(cp)) <= 0)
-				goto out;
-			terms = (size_t)ch;
-		}
-	}
-
-	if (--terms < ressz && res[terms].matched) {
-		chdir(paths.paths[res[terms].volume]);
-		strlcpy(path, res[terms].file, PATH_MAX);
-		usecat = RESTYPE_CAT == res[terms].type;
-	}
-out:
+	ch = mansearch(&paths, arch, sec, argc, argv, &res, &sz);
 	manpath_free(&paths);
-	resfree(res, ressz);
-	exprfree(e);
 
-	if ('\0' == path[0])
-		return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
+	if (0 == ch)
+		goto usage;
 
-	if (-1 == pipe(fds)) {
-		perror(NULL);
-		exit(EXIT_FAILURE);
+	for (i = 0; i < sz; i++) {
+		printf("%s - %s\n", res[i].file, res[i].desc);
+		free(res[i].desc);
 	}
 
-	if (-1 == (pid = fork())) {
-		perror(NULL);
-		exit(EXIT_FAILURE);
-	} else if (pid > 0) {
-		dup2(fds[0], STDIN_FILENO);
-		close(fds[1]);
-		prog = NULL != getenv("MANPAGER") ? 
-			getenv("MANPAGER") :
-			(NULL != getenv("PAGER") ? 
-			 getenv("PAGER") : "more");
-		execlp(prog, prog, (char *)NULL);
-		perror(prog);
-		return(EXIT_FAILURE);
-	}
-
-	dup2(fds[1], STDOUT_FILENO);
-	close(fds[0]);
-	prog = usecat ? "cat" : "mandoc";
-	execlp(prog, prog, path, (char *)NULL);
-	perror(prog);
+	free(res);
+	return(sz ? EXIT_SUCCESS : EXIT_FAILURE);
+usage:
+	fprintf(stderr, "usage: %s [-C conf] "
+			 	  "[-M paths] "
+				  "[-m paths] "
+				  "[-S arch] "
+				  "[-s section] "
+			          "expr ...\n", 
+				  progname);
 	return(EXIT_FAILURE);
 }
-
-/* ARGSUSED */
-static void
-list(struct res *res, size_t sz, void *arg)
-{
-	size_t		 i;
-
-	qsort(res, sz, sizeof(struct res), cmp);
-
-	if (EMPTYSET(res, sz) || SINGLETON(res, sz))
-		return;
-
-	if ( ! isatty(STDOUT_FILENO))
-		for (i = 0; i < sz && res[i].matched; i++)
-			printf("%s(%s%s%s) - %.70s\n", 
-					res[i].title, res[i].cat,
-					*res[i].arch ? "/" : "",
-					*res[i].arch ? res[i].arch : "",
-					res[i].desc);
-	else
-		for (i = 0; i < sz && res[i].matched; i++)
-			printf("[%zu] %s(%s%s%s) - %.70s\n", i + 1,
-					res[i].title, res[i].cat,
-					*res[i].arch ? "/" : "",
-					*res[i].arch ? res[i].arch : "",
-					res[i].desc);
-}
-
-static int
-cmp(const void *p1, const void *p2)
-{
-	const struct res *r1 = p1;
-	const struct res *r2 = p2;
-
-	if (0 == r1->matched)
-		return(1);
-	else if (0 == r2->matched)
-		return(1);
-
-	return(strcasecmp(r1->title, r2->title));
-}
-
-static void
-usage(void)
-{
-
-	fprintf(stderr, "usage: %s "
-			"[-C file] "
-			"[-M manpath] "
-			"[-m manpath] "
-			"[-S arch] "
-			"[-s section] "
-			"expression ...\n",
-			progname);
-}