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, 178 insertions, 0 deletions

diff --git a/manpage.c b/manpage.c
new file mode 100644
index 00000000..14f87665
--- /dev/null
+++ b/manpage.c
@@ -0,0 +1,178 @@
+/*	$Id: manpage.c,v 1.1 2012/06/08 10:44:52 kristaps Exp $ */
+/*
+ * 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
+ * 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.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <sys/param.h>
+
+#include <assert.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "manpath.h"
+#include "mansearch.h"
+
+static	void	 show(const char *, const char *);
+
+int
+main(int argc, char *argv[])
+{
+	int		 ch, term;
+	size_t		 i, sz, len;
+	struct manpage	*res;
+	char		*conf_file, *defpaths, *auxpaths, *cp,
+			*arch, *sec;
+	char		 buf[MAXPATHLEN];
+	const char	*cmd;
+	struct manpaths	 paths;
+	char		*progname;
+	extern char	*optarg;
+	extern int	 optind;
+
+	term = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO);
+
+	progname = strrchr(argv[0], '/');
+	if (progname == NULL)
+		progname = argv[0];
+	else
+		++progname;
+
+	auxpaths = defpaths = conf_file = arch = sec = NULL;
+	memset(&paths, 0, sizeof(struct manpaths));
+
+	while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:")))
+		switch (ch) {
+		case ('C'):
+			conf_file = optarg;
+			break;
+		case ('M'):
+			defpaths = optarg;
+			break;
+		case ('m'):
+			auxpaths = optarg;
+			break;
+		case ('S'):
+			arch = optarg;
+			break;
+		case ('s'):
+			sec = optarg;
+			break;
+		default:
+			goto usage;
+		}
+
+	argc -= optind;
+	argv += optind;
+
+	if (0 == argc)
+		goto usage;
+
+	manpath_parse(&paths, conf_file, defpaths, auxpaths);
+	ch = mansearch(&paths, arch, sec, argc, argv, &res, &sz);
+	manpath_free(&paths);
+
+	if (0 == ch)
+		goto usage;
+
+	if (0 == sz) {
+		free(res);
+		return(EXIT_FAILURE);
+	} else if (1 == sz && term) {
+		i = 1;
+		goto show;
+	} else if (NULL == res)
+		return(EXIT_FAILURE);
+
+	for (i = 0; i < sz; i++) {
+		printf("%6zu  %s: %s\n", 
+			i + 1, res[i].file, res[i].desc);
+		free(res[i].desc);
+	}
+
+	if (0 == term) {
+		free(res);
+		return(EXIT_SUCCESS);
+	}
+
+	i = 1;
+	printf("Enter a choice [1]: ");
+	fflush(stdout);
+
+	if (NULL != (cp = fgetln(stdin, &len)))
+		if ('\n' == cp[--len] && len > 0) {
+			cp[len] = '\0';
+			if ((i = atoi(cp)) < 1 || i > sz)
+				i = 0;
+		}
+
+	if (0 == i) {
+		free(res);
+		return(EXIT_SUCCESS);
+	}
+show:
+	cmd = res[i - 1].form ? "mandoc" : "cat";
+	strlcpy(buf, res[i - 1].file, MAXPATHLEN);
+	free(res);
+
+	show(cmd, buf);
+	/* NOTREACHED */
+usage:
+	fprintf(stderr, "usage: %s [-C conf] "
+			 	  "[-M paths] "
+				  "[-m paths] "
+				  "[-S arch] "
+				  "[-s section] "
+			          "expr ...\n", 
+				  progname);
+	return(EXIT_FAILURE);
+}
+
+static void
+show(const char *cmd, const char *file)
+{
+	int		 fds[2];
+	pid_t		 pid;
+
+	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]);
+		cmd = NULL != getenv("MANPAGER") ? 
+			getenv("MANPAGER") :
+			(NULL != getenv("PAGER") ? 
+			 getenv("PAGER") : "more");
+		execlp(cmd, cmd, (char *)NULL);
+		perror(cmd);
+		exit(EXIT_FAILURE);
+	}
+
+	dup2(fds[1], STDOUT_FILENO);
+	close(fds[0]);
+	execlp(cmd, cmd, file, (char *)NULL);
+	perror(cmd);
+	exit(EXIT_FAILURE);
+}