auto import from //depot/cupcake/@135843
diff --git a/minzip/DirUtil.c b/minzip/DirUtil.c
new file mode 100644
index 0000000..20c89cd
--- /dev/null
+++ b/minzip/DirUtil.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <dirent.h>
+#include <limits.h>
+
+#include "DirUtil.h"
+
+typedef enum { DMISSING, DDIR, DILLEGAL } DirStatus;
+
+static DirStatus
+getPathDirStatus(const char *path)
+{
+ struct stat st;
+ int err;
+
+ err = stat(path, &st);
+ if (err == 0) {
+ /* Something's there; make sure it's a directory.
+ */
+ if (S_ISDIR(st.st_mode)) {
+ return DDIR;
+ }
+ errno = ENOTDIR;
+ return DILLEGAL;
+ } else if (errno != ENOENT) {
+ /* Something went wrong, or something in the path
+ * is bad. Can't do anything in this situation.
+ */
+ return DILLEGAL;
+ }
+ return DMISSING;
+}
+
+int
+dirCreateHierarchy(const char *path, int mode,
+ const struct utimbuf *timestamp, bool stripFileName)
+{
+ DirStatus ds;
+
+ /* Check for an empty string before we bother
+ * making any syscalls.
+ */
+ if (path[0] == '\0') {
+ errno = ENOENT;
+ return -1;
+ }
+
+ /* Allocate a path that we can modify; stick a slash on
+ * the end to make things easier.
+ */
+ size_t pathLen = strlen(path);
+ char *cpath = (char *)malloc(pathLen + 2);
+ if (cpath == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+ memcpy(cpath, path, pathLen);
+ if (stripFileName) {
+ /* Strip everything after the last slash.
+ */
+ char *c = cpath + pathLen - 1;
+ while (c != cpath && *c != '/') {
+ c--;
+ }
+ if (c == cpath) {
+//xxx test this path
+ /* No directory component. Act like the path was empty.
+ */
+ errno = ENOENT;
+ free(cpath);
+ return -1;
+ }
+ c[1] = '\0'; // Terminate after the slash we found.
+ } else {
+ /* Make sure that the path ends in a slash.
+ */
+ cpath[pathLen] = '/';
+ cpath[pathLen + 1] = '\0';
+ }
+
+ /* See if it already exists.
+ */
+ ds = getPathDirStatus(cpath);
+ if (ds == DDIR) {
+ return 0;
+ } else if (ds == DILLEGAL) {
+ return -1;
+ }
+
+ /* Walk up the path from the root and make each level.
+ * If a directory already exists, no big deal.
+ */
+ char *p = cpath;
+ while (*p != '\0') {
+ /* Skip any slashes, watching out for the end of the string.
+ */
+ while (*p != '\0' && *p == '/') {
+ p++;
+ }
+ if (*p == '\0') {
+ break;
+ }
+
+ /* Find the end of the next path component.
+ * We know that we'll see a slash before the NUL,
+ * because we added it, above.
+ */
+ while (*p != '/') {
+ p++;
+ }
+ *p = '\0';
+
+ /* Check this part of the path and make a new directory
+ * if necessary.
+ */
+ ds = getPathDirStatus(cpath);
+ if (ds == DILLEGAL) {
+ /* Could happen if some other process/thread is
+ * messing with the filesystem.
+ */
+ free(cpath);
+ return -1;
+ } else if (ds == DMISSING) {
+ int err;
+
+ err = mkdir(cpath, mode);
+ if (err != 0) {
+ free(cpath);
+ return -1;
+ }
+ if (timestamp != NULL && utime(cpath, timestamp)) {
+ free(cpath);
+ return -1;
+ }
+ }
+ // else, this directory already exists.
+
+ /* Repair the path and continue.
+ */
+ *p = '/';
+ }
+ free(cpath);
+
+ return 0;
+}
+
+int
+dirUnlinkHierarchy(const char *path)
+{
+ struct stat st;
+ DIR *dir;
+ struct dirent *de;
+ int fail = 0;
+
+ /* is it a file or directory? */
+ if (lstat(path, &st) < 0) {
+ return -1;
+ }
+
+ /* a file, so unlink it */
+ if (!S_ISDIR(st.st_mode)) {
+ return unlink(path);
+ }
+
+ /* a directory, so open handle */
+ dir = opendir(path);
+ if (dir == NULL) {
+ return -1;
+ }
+
+ /* recurse over components */
+ errno = 0;
+ while ((de = readdir(dir)) != NULL) {
+//TODO: don't blow the stack
+ char dn[PATH_MAX];
+ if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, ".")) {
+ continue;
+ }
+ snprintf(dn, sizeof(dn), "%s/%s", path, de->d_name);
+ if (dirUnlinkHierarchy(dn) < 0) {
+ fail = 1;
+ break;
+ }
+ errno = 0;
+ }
+ /* in case readdir or unlink_recursive failed */
+ if (fail || errno < 0) {
+ int save = errno;
+ closedir(dir);
+ errno = save;
+ return -1;
+ }
+
+ /* close directory handle */
+ if (closedir(dir) < 0) {
+ return -1;
+ }
+
+ /* delete target directory */
+ return rmdir(path);
+}
+
+int
+dirSetHierarchyPermissions(const char *path,
+ int uid, int gid, int dirMode, int fileMode)
+{
+ struct stat st;
+ if (lstat(path, &st)) {
+ return -1;
+ }
+
+ /* ignore symlinks */
+ if (S_ISLNK(st.st_mode)) {
+ return 0;
+ }
+
+ /* directories and files get different permissions */
+ if (chown(path, uid, gid) ||
+ chmod(path, S_ISDIR(st.st_mode) ? dirMode : fileMode)) {
+ return -1;
+ }
+
+ /* recurse over directory components */
+ if (S_ISDIR(st.st_mode)) {
+ DIR *dir = opendir(path);
+ if (dir == NULL) {
+ return -1;
+ }
+
+ errno = 0;
+ const struct dirent *de;
+ while (errno == 0 && (de = readdir(dir)) != NULL) {
+ if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, ".")) {
+ continue;
+ }
+
+ char dn[PATH_MAX];
+ snprintf(dn, sizeof(dn), "%s/%s", path, de->d_name);
+ if (!dirSetHierarchyPermissions(dn, uid, gid, dirMode, fileMode)) {
+ errno = 0;
+ } else if (errno == 0) {
+ errno = -1;
+ }
+ }
+
+ if (errno != 0) {
+ int save = errno;
+ closedir(dir);
+ errno = save;
+ return -1;
+ }
+
+ if (closedir(dir)) {
+ return -1;
+ }
+ }
+
+ return 0;
+}