1 files changed, 280 insertions, 0 deletions

diff --git a/minzip/DirUtil.c b/minzip/DirUtil.c
new file mode 100644
index 000000000..20c89cd6f
--- /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;
+}