Be insane. Make apropos(1) subsume man(1).

1 files changed, 91 insertions, 19 deletions

diff --git a/apropos.c b/apropos.c
index 5278832e..4fcfba6f 100644
--- a/apropos.c
+++ b/apropos.c
@@ -1,6 +1,6 @@
-/*	$Id: apropos.c,v 1.27 2012/03/24 00:31:55 kristaps Exp $ */
+/*	$Id: apropos.c,v 1.28 2012/03/24 01:46:25 kristaps Exp $ */
 /*
- * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -30,6 +30,12 @@
 #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);
@@ -39,14 +45,17 @@ static	char	*progname;
 int
 main(int argc, char *argv[])
 {
-	int		 ch, rc, whatis;
+	int		 ch, rc, whatis, usecat;
 	struct res	*res;
 	struct manpaths	 paths;
-	size_t		 terms, ressz;
+	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;
-	char		*conf_file;
+	char		*defpaths, *auxpaths, *conf_file, *cp;
 	extern int	 optind;
 	extern char	*optarg;
 
@@ -61,11 +70,13 @@ main(int argc, char *argv[])
 	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) {
@@ -111,15 +122,63 @@ main(int argc, char *argv[])
 		(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) {
+		strlcpy(path, res[terms].file, PATH_MAX);
+		usecat = RESTYPE_CAT == res[terms].type;
 	}
 out:
 	manpath_free(&paths);
 	resfree(res, ressz);
 	exprfree(e);
-	return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
+
+	if ('\0' == path[0])
+		return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
+
+	if (-1 == pipe(fds)) {
+		perror(NULL);
+		exit(EXIT_FAILURE);
+	}
+
+	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);
+	return(EXIT_FAILURE);
 }
 
 /* ARGSUSED */
@@ -130,24 +189,37 @@ list(struct res *res, size_t sz, void *arg)
 
 	qsort(res, sz, sizeof(struct res), cmp);
 
-	for (i = 0; i < sz; i++) {
-		if ( ! res[i].matched)
-			continue;
-		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);
-	}
+	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(((const struct res *)p1)->title,
-				((const struct res *)p2)->title));
+	return(strcasecmp(r1->title, r2->title));
 }
 
 static void