Adding upstream version 2.12.0.upstream/2.12.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 435 insertions, 0 deletions

diff --git a/src/globbing.c b/src/globbing.c
new file mode 100644
index 0000000..b933898
--- /dev/null
+++ b/src/globbing.c
@@ -0,0 +1,435 @@
+/*
+ * globbing.c: interface to the POSIX glob routines
+ *
+ * Copyright (C) 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002, 2003, 2006, 2007, 2008 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Mon Mar 13 20:27:36 GMT 1995  Wilf. (G.Wilford@ee.surrey.ac.uk)
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <glob.h>
+#include <sys/types.h>
+#include <dirent.h>
+
+#include "error.h"
+#include "fnmatch.h"
+#include "gl_array_list.h"
+#include "gl_hash_map.h"
+#include "gl_xlist.h"
+#include "gl_xmap.h"
+#include "regex.h"
+#include "xalloc.h"
+#include "xstrndup.h"
+#include "xvasprintf.h"
+
+#include "manconfig.h"
+
+#include "appendstr.h"
+#include "cleanup.h"
+#include "debug.h"
+#include "glcontainers.h"
+#include "util.h"
+#include "xregcomp.h"
+
+#include "globbing.h"
+
+const char *extension;
+static const char *mandir_layout = MANDIR_LAYOUT;
+
+static char *make_pattern (const char *name, const char *sec, int opts)
+{
+	char *pattern;
+
+	if (opts & LFF_REGEX) {
+		if (extension) {
+			char *esc_ext = escape_shell (extension);
+			pattern = xasprintf ("%s\\..*%s.*", name, esc_ext);
+			free (esc_ext);
+		} else {
+			char *esc_sec = escape_shell (sec);
+			pattern = xasprintf ("%s\\.%s.*", name, esc_sec);
+			free (esc_sec);
+		}
+	} else {
+		if (extension)
+			pattern = xasprintf ("%s.*%s*", name, extension);
+		else
+			pattern = xasprintf ("%s.%s*", name, sec);
+	}
+
+	return pattern;
+}
+
+#define LAYOUT_GNU	1
+#define LAYOUT_HPUX	2
+#define LAYOUT_IRIX	4
+#define LAYOUT_SOLARIS	8
+#define LAYOUT_BSD	16
+
+static int parse_layout (const char *layout)
+{
+	if (!*layout)
+		return LAYOUT_GNU | LAYOUT_HPUX | LAYOUT_IRIX |
+		       LAYOUT_SOLARIS | LAYOUT_BSD;
+	else {
+		int flags = 0;
+
+		char *upper_layout = xstrdup (layout);
+		char *layoutp;
+		for (layoutp = upper_layout; *layoutp; layoutp++)
+			*layoutp = CTYPE (toupper, *layoutp);
+
+		if (strstr (upper_layout, "GNU"))
+			flags |= LAYOUT_GNU;
+		if (strstr (upper_layout, "HPUX"))
+			flags |= LAYOUT_HPUX;
+		if (strstr (upper_layout, "IRIX"))
+			flags |= LAYOUT_IRIX;
+		if (strstr (upper_layout, "SOLARIS"))
+			flags |= LAYOUT_SOLARIS;
+		if (strstr (upper_layout, "BSD"))
+			flags |= LAYOUT_BSD;
+
+		free (upper_layout);
+		return flags;
+	}
+}
+
+struct dirent_names {
+	char **names;
+	size_t names_len, names_max;
+};
+
+static void dirent_names_free (const void *value)
+{
+	struct dirent_names *cache = (struct dirent_names *) value;
+	size_t i;
+
+	for (i = 0; i < cache->names_len; ++i)
+		free (cache->names[i]);
+	free (cache->names);
+	free (cache);
+}
+
+static gl_map_t dirent_map = NULL;
+
+static int cache_compare (const void *a, const void *b)
+{
+	const char *left = *(const char **) a;
+	const char *right = *(const char **) b;
+	return strcasecmp (left, right);
+}
+
+static struct dirent_names *update_directory_cache (const char *path)
+{
+	struct dirent_names *cache;
+	DIR *dir;
+	struct dirent *entry;
+
+	if (!dirent_map) {
+		dirent_map = new_string_map (GL_HASH_MAP, dirent_names_free);
+		push_cleanup ((cleanup_fun) gl_map_free, dirent_map, 0);
+	}
+	cache = (struct dirent_names *) gl_map_get (dirent_map, path);
+
+	/* Check whether we've got this one already. */
+	if (cache) {
+		debug ("update_directory_cache %s: hit\n", path);
+		return cache;
+	}
+
+	debug ("update_directory_cache %s: miss\n", path);
+
+	dir = opendir (path);
+	if (!dir) {
+		debug_error ("can't open directory %s", path);
+		return NULL;
+	}
+
+	cache = XMALLOC (struct dirent_names);
+	cache->names_len = 0;
+	cache->names_max = 1024;
+	cache->names = XNMALLOC (cache->names_max, char *);
+
+	/* Dump all the entries into cache->names, resizing if necessary. */
+	for (entry = readdir (dir); entry; entry = readdir (dir)) {
+		if (cache->names_len >= cache->names_max) {
+			cache->names_max *= 2;
+			cache->names =
+				xnrealloc (cache->names, cache->names_max,
+					   sizeof (char *));
+		}
+		cache->names[cache->names_len++] = xstrdup (entry->d_name);
+	}
+
+	qsort (cache->names, cache->names_len, sizeof *cache->names,
+	       &cache_compare);
+
+	gl_map_put (dirent_map, xstrdup (path), cache);
+	closedir (dir);
+
+	return cache;
+}
+
+struct pattern_bsearch {
+	char *pattern;
+	size_t len;
+};
+
+static int pattern_compare (const void *a, const void *b)
+{
+	const struct pattern_bsearch *key = a;
+	const char *memb = *(const char **) b;
+	return strncasecmp (key->pattern, memb, key->len);
+}
+
+static void match_regex_in_directory (const char *path, const char *pattern,
+				      int opts, gl_list_t matched,
+				      struct dirent_names *cache)
+{
+	int flags;
+	regex_t preg;
+	size_t i;
+
+	debug ("matching regex in %s: %s\n", path, pattern);
+
+	flags = REG_EXTENDED | REG_NOSUB |
+		((opts & LFF_MATCHCASE) ? 0 : REG_ICASE);
+
+	xregcomp (&preg, pattern, flags);
+
+	for (i = 0; i < cache->names_len; ++i) {
+		if (regexec (&preg, cache->names[i], 0, NULL, 0) != 0)
+			continue;
+
+		debug ("matched: %s/%s\n", path, cache->names[i]);
+
+		gl_list_add_last (matched,
+				  xasprintf ("%s/%s", path, cache->names[i]));
+	}
+
+	regfree (&preg);
+}
+
+static void match_wildcard_in_directory (const char *path, const char *pattern,
+					 int opts, gl_list_t matched,
+					 struct dirent_names *cache)
+{
+	int flags;
+	struct pattern_bsearch pattern_start = { NULL, -1 };
+	char **bsearched;
+	size_t i;
+
+	debug ("matching wildcard in %s: %s\n", path, pattern);
+
+	flags = (opts & LFF_MATCHCASE) ? 0 : FNM_CASEFOLD;
+
+	pattern_start.pattern = xstrndup (pattern,
+					  strcspn (pattern, "?*{}\\"));
+	pattern_start.len = strlen (pattern_start.pattern);
+	bsearched = bsearch (&pattern_start, cache->names,
+			     cache->names_len, sizeof *cache->names,
+			     &pattern_compare);
+	if (!bsearched) {
+		free (pattern_start.pattern);
+		return;
+	}
+	while (bsearched > cache->names &&
+	       !strncasecmp (pattern_start.pattern, *(bsearched - 1),
+			     pattern_start.len))
+		--bsearched;
+
+	for (i = bsearched - cache->names; i < cache->names_len; ++i) {
+		assert (pattern_start.pattern);
+		if (strncasecmp (pattern_start.pattern,
+				 cache->names[i], pattern_start.len))
+			break;
+
+		if (fnmatch (pattern, cache->names[i], flags) != 0)
+			continue;
+
+		debug ("matched: %s/%s\n", path, cache->names[i]);
+
+		gl_list_add_last (matched,
+				  xasprintf ("%s/%s", path, cache->names[i]));
+	}
+
+	free (pattern_start.pattern);
+}
+
+static void match_in_directory (const char *path, const char *pattern,
+				int opts, gl_list_t matched)
+{
+	struct dirent_names *cache;
+
+	cache = update_directory_cache (path);
+	if (!cache) {
+		debug ("directory cache update failed\n");
+		return;
+	}
+
+	if (opts & LFF_REGEX)
+		match_regex_in_directory (path, pattern, opts, matched, cache);
+	else
+		match_wildcard_in_directory (path, pattern, opts, matched,
+					     cache);
+}
+
+gl_list_t look_for_file (const char *hier, const char *sec,
+			 const char *unesc_name, bool cat, int opts)
+{
+	gl_list_t matched;
+	char *pattern, *path = NULL;
+	static int layout = -1;
+	char *name;
+
+	matched = new_string_list (GL_ARRAY_LIST, false);
+
+	/* This routine only does a minimum amount of matching. It does not
+	   find cat files in the alternate cat directory. */
+
+	if (layout == -1) {
+		layout = parse_layout (mandir_layout);
+		debug ("Layout is %s (%d)\n", mandir_layout, layout);
+	}
+
+	if (opts & (LFF_REGEX | LFF_WILDCARD))
+		name = xstrdup (unesc_name);
+	else
+		name = escape_shell (unesc_name);
+
+	/* allow lookups like "3x foo" to match "../man3/foo.3x" */
+
+	if (layout & LAYOUT_GNU) {
+		gl_list_t dirs;
+		const char *dir;
+
+		dirs = new_string_list (GL_ARRAY_LIST, false);
+		pattern = xasprintf ("%s\t*", cat ? "cat" : "man");
+		assert (pattern);
+		*strrchr (pattern, '\t') = *sec;
+		match_in_directory (hier, pattern, LFF_MATCHCASE, dirs);
+		free (pattern);
+
+		pattern = make_pattern (name, sec, opts);
+		GL_LIST_FOREACH (dirs, dir) {
+			if (path)
+				*path = '\0';
+			match_in_directory (dir, pattern, opts, matched);
+		}
+		free (pattern);
+		gl_list_free (dirs);
+	}
+
+	/* Try HPUX style compressed man pages */
+	if ((layout & LAYOUT_HPUX) && gl_list_size (matched) == 0) {
+		if (path)
+			*path = '\0';
+		path = appendstr (path, hier, cat ? "/cat" : "/man",
+				  sec, ".Z", (void *) 0);
+		pattern = make_pattern (name, sec, opts);
+
+		match_in_directory (path, pattern, opts, matched);
+		free (pattern);
+	}
+
+	/* Try man pages without the section extension --- IRIX man pages */
+	if ((layout & LAYOUT_IRIX) && gl_list_size (matched) == 0) {
+		if (path)
+			*path = '\0';
+		path = appendstr (path, hier, cat ? "/cat" : "/man", sec,
+				  (void *) 0);
+		if (opts & LFF_REGEX)
+			pattern = xasprintf ("%s\\..*", name);
+		else
+			pattern = xasprintf ("%s.*", name);
+
+		match_in_directory (path, pattern, opts, matched);
+		free (pattern);
+	}
+
+	/* Try Solaris style man page directories */
+	if ((layout & LAYOUT_SOLARIS) && gl_list_size (matched) == 0) {
+		if (path)
+			*path = '\0';
+		/* TODO: This needs to be man/sec*, not just man/sec. */
+		path = appendstr (path, hier, cat ? "/cat" : "/man", sec,
+				  (void *) 0);
+		pattern = make_pattern (name, sec, opts);
+
+		match_in_directory (path, pattern, opts, matched);
+		free (pattern);
+	}
+
+	/* BSD cat pages take the extension .0 */
+	if ((layout & LAYOUT_BSD) && gl_list_size (matched) == 0) {
+		if (path)
+			*path = '\0';
+		if (cat) {
+			path = appendstr (path, hier, "/cat", sec, (void *) 0);
+			if (opts & LFF_REGEX)
+				pattern = xasprintf ("%s\\.0.*", name);
+			else
+				pattern = xasprintf ("%s.0*", name);
+		} else {
+			path = appendstr (path, hier, "/man", sec, (void *) 0);
+			pattern = make_pattern (name, sec, opts);
+		}
+		match_in_directory (path, pattern, opts, matched);
+		free (pattern);
+	}
+
+	free (name);
+	free (path);
+
+	return matched;
+}
+
+gl_list_t expand_path (const char *path)
+{
+	int res = 0;
+	gl_list_t result;
+	glob_t globbuf;
+
+	result = new_string_list (GL_ARRAY_LIST, false);
+
+	res = glob (path, GLOB_NOCHECK, NULL, &globbuf);
+	/* if glob failed, return the given path */
+	if (res != 0)
+		gl_list_add_last (result, xstrdup (path));
+	else {
+		size_t i;
+		for (i = 0; i < globbuf.gl_pathc; ++i)
+			gl_list_add_last (result,
+					  xstrdup (globbuf.gl_pathv[i]));
+	}
+
+	globfree (&globbuf);
+
+	return result;
+}