From 4cd28ed2aa3f098a1d35dd44ecec27002fadb89b Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Sat, 13 Feb 2016 15:57:41 -0500
Subject: Fix -name handling when the root has trailing slashes.

---
 bftw.c   | 20 ++++++++++++++++++--
 eval.c   | 26 +++++++++++++++++++++++++-
 tests.sh | 18 +++++++++++++++++-
 3 files changed, 60 insertions(+), 4 deletions(-)

diff --git a/bftw.c b/bftw.c
index 8a55f13..e64a93c 100644
--- a/bftw.c
+++ b/bftw.c
@@ -599,15 +599,28 @@ static void bftw_set_error(struct bftw_state *state, int error) {
 	state->ftwbuf.typeflag = BFTW_ERROR;
 }
 
+/**
+ * Figure out the name offset in a path.
+ */
+static size_t basename_offset(const char *path) {
+	size_t i;
+
+	// Strip trailing slashes
+	for (i = strlen(path); i > 0 && path[i - 1] == '/'; --i);
+
+	// Find the beginning of the name
+	for (; i > 0 && path[i - 1] != '/'; --i);
+
+	return i;
+}
+
 /**
  * Initialize the buffers with data about the current path.
  */
 static void bftw_init_buffers(struct bftw_state *state, const struct dirent *de) {
 	struct BFTW *ftwbuf = &state->ftwbuf;
 	ftwbuf->path = state->path.str;
-	ftwbuf->nameoff = 0;
 	ftwbuf->error = 0;
-	ftwbuf->depth = 0;
 	ftwbuf->visit = (state->status == BFTW_GC ? BFTW_POST : BFTW_PRE);
 	ftwbuf->statbuf = NULL;
 	ftwbuf->at_fd = AT_FDCWD;
@@ -624,6 +637,9 @@ static void bftw_init_buffers(struct bftw_state *state, const struct dirent *de)
 		}
 
 		dircache_entry_base(&state->cache, current, &ftwbuf->at_fd, &ftwbuf->at_path);
+	} else {
+		ftwbuf->nameoff = basename_offset(ftwbuf->path);
+		ftwbuf->depth = 0;
 	}
 
 	if (de) {
diff --git a/eval.c b/eval.c
index 5c78d0b..cd9b2e5 100644
--- a/eval.c
+++ b/eval.c
@@ -16,6 +16,7 @@
 #include <fcntl.h>
 #include <fnmatch.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
@@ -311,7 +312,30 @@ bool eval_links(const struct expr *expr, struct eval_state *state) {
  */
 bool eval_name(const struct expr *expr, struct eval_state *state) {
 	struct BFTW *ftwbuf = state->ftwbuf;
-	return fnmatch(expr->sdata, ftwbuf->path + ftwbuf->nameoff, 0) == 0;
+
+	const char *name = ftwbuf->path + ftwbuf->nameoff;
+	char *copy = NULL;
+	if (ftwbuf->depth == 0) {
+		// Any trailing slashes are not part of the name.  This can only
+		// happen for the root path.
+		const char *slash = strchr(name, '/');
+		if (slash == name) {
+			// The name of "/" (or "//", etc.) is "/"
+			name = "/";
+		} else if (slash) {
+			copy = strdup(name);
+			if (!copy) {
+				eval_error(state);
+				return false;
+			}
+			copy[slash - name] = '\0';
+			name = copy;
+		}
+	}
+
+	bool ret = fnmatch(expr->sdata, name, 0) == 0;
+	free(copy);
+	return ret;
 }
 
 /**
diff --git a/tests.sh b/tests.sh
index 046fddd..97d274b 100755
--- a/tests.sh
+++ b/tests.sh
@@ -199,7 +199,23 @@ function test_0032() {
     find_diff -L "$links" -xtype f 2>/dev/null
 }
 
-for i in {1..32}; do
+function test_0033() {
+    find_diff "$basic/a" -name 'a'
+}
+
+function test_0034() {
+    find_diff "$basic/g/" -name 'g'
+}
+
+function test_0035() {
+    find_diff "/" -maxdepth 0 -name '/' 2>/dev/null
+}
+
+function test_0036() {
+    find_diff "//" -maxdepth 0 -name '/' 2>/dev/null
+}
+
+for i in {1..36}; do
     test="test_$(printf '%04d' $i)"
     "$test" "$dir"
     status=$?
-- 
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