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--- /dev/null
+/*
+ * Copyright (c) 2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <TargetConditionals.h>
+#include <xpc/xpc.h>
+#include <errno.h>
+
+#include "tzlink.h"
+#include "tzlink_internal.h"
+
+errno_t
+tzlink(const char *tz)
+{
+#if TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR
+ xpc_connection_t connection;
+ xpc_object_t request, reply;
+ errno_t e;
+
+ if (tz == NULL) {
+ return EINVAL;
+ }
+
+ connection = xpc_connection_create_mach_service(TZLINK_SERVICE_NAME, NULL, XPC_CONNECTION_MACH_SERVICE_PRIVILEGED);
+ xpc_connection_set_event_handler(connection, ^(__unused xpc_object_t event) {
+ });
+ xpc_connection_resume(connection);
+
+ request = xpc_dictionary_create(NULL, NULL, 0);
+ xpc_dictionary_set_string(request, TZLINK_KEY_REQUEST_TIMEZONE, tz);
+
+ reply = xpc_connection_send_message_with_reply_sync(connection, request);
+ if (xpc_get_type(reply) == XPC_TYPE_DICTIONARY) {
+ e = (errno_t)xpc_dictionary_get_uint64(reply, TZLINK_KEY_REPLY_ERROR);
+ } else {
+ e = EIO;
+ }
+
+ xpc_release(reply);
+ xpc_release(request);
+ xpc_release(connection);
+
+ return e;
+#else /* !TARGET_OS_IPHONE */
+#pragma unused (tz)
+ return ENOTSUP;
+#endif /* TARGET_OS_IPHONE */
+}
--- /dev/null
+/*
+ * Copyright (c) 2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef _TZLINK_H_
+#define _TZLINK_H_
+
+/*!
+ * @function tzlink
+ * Create the timezone link at TZDEFAULT
+ *
+ * @param tz
+ * New timezone, e.g. "America/Los_Angeles". This path is relative to TZDIR,
+ * and must not contain any relative path components or stray slashes.
+ * The file must exist and must be a valid timezone file with correct
+ * ownership (root:wheel) and permissions (0644).
+ *
+ * @result
+ * If the call succeeds, will return zero. Otherwise, returns an error:
+ * EINVAL: Invalid input, e.g. NULL or a path with relative components.
+ * ENAMETOOLONG: Input too long (generates a path > PATH_MAX)
+ * ENOENT: Specified file doesn't exist or fails owner/perm check.
+ * EPERM: Entitlement check failed.
+ * EIO: Failed to communicate with backing daemon.
+ * ENOTSUP: Always returned on OS X.
+ * And possibly others not documented here.
+ *
+ * @discussion
+ * This call can be used by any sufficiently-entitled client to overwrite
+ * the timezone link at TZDEFAULT (see <tzfile.h>). It communicates with a
+ * root daemon that does the necessary validation and file system work.
+ * Upon success, the "SignificantTimeChangeNotification" notification is
+ * posted.
+ */
+errno_t tzlink(const char *tz);
+
+#endif /* !_TZLINK_H_ */
--- /dev/null
+/*
+ * Copyright (c) 2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#define TZLINK_SERVICE_NAME "com.apple.tzlink"
+
+#define TZLINK_ENTITLEMENT "com.apple.tzlink.allow"
+
+#define TZLINK_KEY_REQUEST_TIMEZONE "tz" // string
+#define TZLINK_KEY_REPLY_ERROR "error" // uint64
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+ <key>EnableTransactions</key>
+ <true/>
+ <key>JetsamProperties</key>
+ <dict>
+ <key>JetsamMemoryLimit</key>
+ <integer>300</integer>
+ <key>JetsamPriority</key>
+ <integer>-49</integer>
+ </dict>
+ <key>Label</key>
+ <string>com.apple.tzlinkd</string>
+ <key>MachServices</key>
+ <dict>
+ <key>com.apple.tzlink</key>
+ <true/>
+ </dict>
+ <key>POSIXSpawnType</key>
+ <string>Adaptive</string>
+ <key>Program</key>
+ <string>/usr/libexec/tzlinkd</string>
+</dict>
+</plist>
--- /dev/null
+(version 1)
+
+(deny default)
+
+(import "system.sb")
+
+(allow file-write-create file-write-unlink
+ (literal "/private/var/db/timezone/localtime"))
+
+(allow file-read*
+ (literal "/private/var/db/timezone/zoneinfo"))
--- /dev/null
+/*
+ * Copyright (c) 2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <xpc/xpc.h>
+#include <xpc/private.h>
+#include <notify.h>
+#include <tzfile.h>
+
+#include "tzlink_internal.h"
+
+static bool peer_entitled(xpc_connection_t);
+static int set_timezone(const char *);
+static int build_source_path(char *, size_t, const char *);
+static int validate_source_path(const char *);
+
+int
+main(void)
+{
+ dispatch_queue_t queue;
+ xpc_connection_t listener;
+
+ xpc_track_activity();
+
+ queue = dispatch_queue_create(TZLINK_SERVICE_NAME, NULL);
+
+ listener = xpc_connection_create_mach_service(TZLINK_SERVICE_NAME, queue, XPC_CONNECTION_MACH_SERVICE_LISTENER);
+ xpc_connection_set_event_handler(listener, ^(xpc_object_t peer) {
+ if (xpc_get_type(peer) != XPC_TYPE_CONNECTION) {
+ return;
+ }
+
+ xpc_connection_set_target_queue(peer, queue);
+ xpc_connection_set_event_handler(peer, ^(xpc_object_t request) {
+ xpc_object_t reply;
+ const char *tz;
+ int error;
+
+ if (xpc_get_type(request) != XPC_TYPE_DICTIONARY) {
+ return;
+ }
+
+ if (peer_entitled(peer)) {
+ tz = xpc_dictionary_get_string(request, TZLINK_KEY_REQUEST_TIMEZONE);
+ error = tz ? set_timezone(tz) : EINVAL;
+ } else {
+ error = EPERM;
+ }
+
+ reply = xpc_dictionary_create_reply(request);
+ xpc_dictionary_set_uint64(reply, TZLINK_KEY_REPLY_ERROR, (uint64_t)error);
+ xpc_connection_send_message(peer, reply);
+ xpc_release(reply);
+ });
+ xpc_connection_resume(peer);
+ });
+ xpc_connection_resume(listener);
+
+ dispatch_main();
+}
+
+static bool
+peer_entitled(xpc_connection_t peer)
+{
+ xpc_object_t val;
+ bool entitled;
+
+ entitled = false;
+
+ val = xpc_connection_copy_entitlement_value(peer, TZLINK_ENTITLEMENT);
+ if (val != NULL) {
+ entitled = xpc_bool_get_value(val);
+ xpc_release(val);
+ }
+
+ return entitled;
+}
+
+static int
+set_timezone(const char *tz)
+{
+ char srcpath[PATH_MAX];
+ int error;
+
+ error = build_source_path(srcpath, sizeof(srcpath), tz);
+ if (error != 0) {
+ return error;
+ }
+
+ error = validate_source_path(srcpath);
+ if (error != 0) {
+ return error;
+ }
+
+ (void)unlink(TZDEFAULT);
+ if (symlink(srcpath, TZDEFAULT) != 0) {
+ return errno ? errno : EFAULT;
+ }
+
+ /*
+ * notifyd posts "com.apple.system.timezone" automatically,
+ * but we also need post this. Sigh.
+ */
+ (void)notify_post("SignificantTimeChangeNotification");
+
+ return 0;
+}
+
+/* Create path from input. */
+static int
+build_source_path(char *path, size_t size, const char *tz)
+{
+ char *str, *str0;
+ char *pathcomp;
+ int error;
+
+ if (strlcpy(path, TZDIR, size) >= size) {
+ return ENAMETOOLONG;
+ }
+
+ error = 0;
+
+ /* Attempt to validate the input; construct a clean path as we go. */
+ str0 = str = strdup(tz);
+ while ((pathcomp = strsep(&str, "/")) != NULL) {
+ if (pathcomp[0] == '\0' || pathcomp[0] == '.') {
+ error = EINVAL;
+ break;
+ }
+ if (strlcat(path, "/", size) >= size) {
+ error = ENAMETOOLONG;
+ break;
+ }
+ if (strlcat(path, pathcomp, size) >= size) {
+ error = ENAMETOOLONG;
+ break;
+ }
+ }
+ free(str0);
+
+ return error;
+}
+
+/* Validate path. */
+static int
+validate_source_path(const char *path)
+{
+ struct stat sb;
+
+ if (lstat(path, &sb) != 0) {
+ return errno ? errno : EFAULT;
+ }
+
+ /* Ensure that the time zone file is... */
+
+ /* ... a regular file. */
+ if (!S_ISREG(sb.st_mode)) {
+ return ENOENT;
+ }
+
+ /* ... owned by root:wheel */
+ if (sb.st_uid != 0 || sb.st_gid != 0) {
+ return ENOENT;
+ }
+
+ /* ... 0644 perms */
+ if ((sb.st_mode & ACCESSPERMS) != 0644) {
+ return ENOENT;
+ }
+
+ /* ... is a real tzfile (starts with TZif) */
+ // TODO: Validate contents of file.
+
+ return 0;
+}
class ExtentManager extMan;
};
-void
+static void
AddExtentsForFutureFS(class ExtentManager *extMan)
{
// we don't know what blocks future FS will use to recognize itself. But we'd better be safe than sorry and write
extMan->AddByteRangeExtent(extMan->totalBytes - size, size);
}
-void
+static void
AddExtentsForHFS(class ExtentManager *extMan)
{
// first 1KB is boot block, last 512B is reserved
extMan->AddByteRangeExtent(extMan->totalBytes - 1024, 1024);
}
-void
+static void
AddExtentsForMSDOS(class ExtentManager *extMan)
{
// MSDOS needs the first block (in theory, up to 32KB)
extMan->AddByteRangeExtent(0, 32 * 1024);
}
-void
+static void
AddExtentsForNTFS(class ExtentManager *extMan)
{
// NTFS supports block size from 256B to 32768B. The first, middle and last block are needed
extMan->AddByteRangeExtent(extMan->totalBytes / 2 - 32 * 1024, 64 * 1024);
}
-void
+static void
AddExtentsForUDF(class ExtentManager *extMan)
{
off_t lastBlockAddr = extMan->totalBlocks - 1;
}
}
-void
+static void
AddExtentsForUFS(class ExtentManager *extMan)
{
// UFS super block is 8KB at offset 8KB
extMan->AddByteRangeExtent(8192, 8192);
}
-void
+static void
AddExtentsForZFS(class ExtentManager *extMan)
{
// ZFS needs the first 512KB and last 512KB for all the 4 disk labels
extMan->AddByteRangeExtent(extMan->totalBytes - 512 * 1024, 512 * 1024);
}
-void
+static void
AddExtentsForPartitions(class ExtentManager *extMan)
{
// MBR (Master Boot Record) needs the first sector
bufSize = 128 * 1024; // issue large I/O to get better performance
+ if (handle->extMan.nativeBlockSize > bufSize) {
+ bufSize = handle->extMan.nativeBlockSize;
+ }
bufZero = new uint8_t[bufSize];
bzero(bufZero, bufSize);
--- /dev/null
+INSTALL_PATH = $(INSTALL_PREFIX)/usr/libexec
+PRODUCT_NAME = tzlinkd
+
+INSTALL_PREFIX = $(INSTALL_PREFIX_$(PLATFORM_NAME))
+INSTALL_PREFIX_iphonesimulator = $(SDKROOT)
+
+USER_HEADER_SEARCH_PATHS = $(SRCROOT)
+
+ALWAYS_SEARCH_USER_PATHS = NO
+
+GCC_TREAT_WARNINGS_AS_ERRORS = YES
+CLANG_WARN_BOOL_CONVERSION = YES
+CLANG_WARN_CONSTANT_CONVERSION = YES
+CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR
+CLANG_WARN_EMPTY_BODY = YES
+CLANG_WARN_ENUM_CONVERSION = YES
+CLANG_WARN_INT_CONVERSION = YES
+CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR
+CLANG_WARN__DUPLICATE_METHOD_MATCH = YES
+GCC_WARN_64_TO_32_BIT_CONVERSION = YES
+GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR
+GCC_WARN_UNDECLARED_SELECTOR = YES
+GCC_WARN_UNINITIALIZED_AUTOS = YES
+GCC_WARN_UNUSED_FUNCTION = YES
+GCC_WARN_UNUSED_VARIABLE = YES
+GCC_WARN_UNKNOWN_PRAGMAS = YES
+GCC_WARN_UNUSED_LABEL = YES
+GCC_WARN_UNUSED_PARAMETER = YES
projects / apple / libutil.git / commitdiff
