ladybird/Ports/OpenJDK/patches/0007-java.base-Update-native-modules-to-support-Serenity.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Timur Sultanov <SultanovTS@yandex.ru>
Date: Wed, 16 Feb 2022 21:06:23 +0300
Subject: [PATCH] java.base: Update native modules to support Serenity

---
 .../nio/ch/SocketOptionRegistry.java.template | 21 +++++
 src/java.base/share/native/libjava/io_util.h  |  5 +-
 src/java.base/share/native/libjli/jli_util.h  |  3 +
 src/java.base/share/native/libzip/zip_util.c  |  2 +-
 .../sun/nio/fs/UnixConstants.java.template    | 92 ++++++++++++++++++-
 .../native/libjava/ProcessHandleImpl_unix.c   |  2 +-
 .../unix/native/libjava/TimeZone_md.c         |  4 +-
 .../unix/native/libjava/io_util_md.c          |  2 +-
 .../unix/native/libjava/io_util_md.h          |  6 +-
 src/java.base/unix/native/libjsig/jsig.c      |  4 +
 .../unix/native/libnet/Inet4AddressImpl.c     |  3 +
 .../unix/native/libnet/Inet6AddressImpl.c     |  4 +
 .../unix/native/libnet/NetworkInterface.c     | 11 ++-
 .../unix/native/libnet/net_util_md.h          |  4 +
 .../unix/native/libnio/MappedMemoryUtils.c    |  4 +
 .../native/libnio/ch/DatagramDispatcher.c     |  1 +
 .../unix/native/libnio/ch/FileChannelImpl.c   |  3 +
 .../native/libnio/ch/FileDispatcherImpl.c     |  7 +-
 src/java.base/unix/native/libnio/ch/FileKey.c |  2 +-
 .../unix/native/libnio/ch/NativeThread.c      |  2 +-
 src/java.base/unix/native/libnio/ch/Net.c     |  2 +-
 .../native/libnio/fs/UnixNativeDispatcher.c   | 39 +++++++-
 22 files changed, 207 insertions(+), 16 deletions(-)

diff --git a/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template b/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
index 0672ced15..55bde3569 100644
--- a/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
+++ b/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
@@ -50,6 +50,24 @@
 #endif
 #endif
 
+#define SO_RCVTIMEO 0
+#define SO_SNDTIMEO 1
+#define SO_TYPE 2
+#define SO_ERROR 3
+#define SO_PEERCRED 4
+#define SO_SNDBUF 5
+#define SO_RCVBUF 6
+#define SO_DEBUG 7
+#define SO_REUSEADDR 8
+#define SO_BINDTODEVICE 9
+#define SO_KEEPALIVE 10
+#define SO_TIMESTAMP 11
+#define SO_BROADCAST 12
+#define SO_LINGER 13
+#define SO_ACCEPTCONN 14
+#define SO_DONTROUTE 15
+#define SO_OOBINLINE 16
+
 /* To be able to name the Java constants the same as the C constants without
    having the preprocessor rewrite those identifiers, add PREFIX_ to all
    identifiers matching a C constant. The PREFIX_ is filtered out in the
@@ -125,6 +143,9 @@ class SocketOptionRegistry {
 
 #ifdef AF_INET6
             // IPPROTO_IPV6 is 41
+#ifdef SERENITY
+#define IPV6_TCLASS 1
+#endif
             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_TOS,
                 StandardProtocolFamily.INET6), new OptionKey(41, IPV6_TCLASS));
             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_IF,
diff --git a/src/java.base/share/native/libjava/io_util.h b/src/java.base/share/native/libjava/io_util.h
index 6e960c034..cbd1d087e 100644
--- a/src/java.base/share/native/libjava/io_util.h
+++ b/src/java.base/share/native/libjava/io_util.h
@@ -30,11 +30,14 @@ extern jfieldID IO_fd_fdID;
 extern jfieldID IO_handle_fdID;
 extern jfieldID IO_append_fdID;
 
-#ifdef _ALLBSD_SOURCE
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #include <fcntl.h>
 #ifndef O_SYNC
 #define O_SYNC  O_FSYNC
 #endif
+#if defined(SERENITY)
+#define O_DSYNC O_SYNC
+#endif
 #ifndef O_DSYNC
 #define O_DSYNC O_FSYNC
 #endif
diff --git a/src/java.base/share/native/libjli/jli_util.h b/src/java.base/share/native/libjli/jli_util.h
index 3512b1e96..e60f7581f 100644
--- a/src/java.base/share/native/libjli/jli_util.h
+++ b/src/java.base/share/native/libjli/jli_util.h
@@ -108,6 +108,9 @@ JLI_CmdToArgs(char *cmdline);
 #define _LARGFILE64_SOURCE
 #define JLI_Lseek                       lseek64
 #endif
+#ifdef SERENITY
+#define JLI_Lseek                       lseek
+#endif
 #ifdef MACOSX
 #define JLI_Lseek                       lseek
 #endif
diff --git a/src/java.base/share/native/libzip/zip_util.c b/src/java.base/share/native/libzip/zip_util.c
index fbbd9d850..eef30b9e4 100644
--- a/src/java.base/share/native/libzip/zip_util.c
+++ b/src/java.base/share/native/libzip/zip_util.c
@@ -46,7 +46,7 @@
 #include "zip_util.h"
 #include <zlib.h>
 
-#ifdef _ALLBSD_SOURCE
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #define off64_t off_t
 #define mmap64 mmap
 #endif
diff --git a/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template b/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template
index d60283d24..5d428521b 100644
--- a/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template
+++ b/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template
@@ -31,6 +31,95 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 
+#ifdef SERENITY
+
+#define ESUCCESS 0
+#define EPERM 1
+#define ENOENT 2
+#define ESRCH 3
+#define EINTR 4
+#define EIO 5
+#define ENXIO 6
+#define E2BIG 7
+#define ENOEXEC 8
+#define EBADF 9
+#define ECHILD 10
+#define EAGAIN 12
+#define ENOMEM 12
+#define EACCES 13
+#define EFAULT 14
+#define ENOTBLK 15
+#define EBUSY 16
+#define EEXIST 17
+#define EXDEV 18
+#define ENODEV 19
+#define ENOTDIR 20
+#define EISDIR 21
+#define EINVAL 22
+#define ENFILE 23
+#define EMFILE 24
+#define ENOTTY 25
+#define ETXTBSY 26
+#define EFBIG 27
+#define ENOSPC 28
+#define ESPIPE 29
+#define EROFS 30
+#define EMLINK 31
+#define EPIPE 32
+#define ERANGE 33
+#define ENAMETOOLONG 34
+#define ELOOP 35
+#define EOVERFLOW 36
+#define EOPNOTSUPP 37
+#define ENOSYS 38
+#define ENOTIMPL 39
+#define EAFNOSUPPORT 40
+#define ENOTSOCK 41
+#define EADDRINUSE 42
+#define ENOTEMPTY 43
+#define EDOM 44
+#define ECONNREFUSED 45
+#define EHOSTDOWN 46
+#define EADDRNOTAVAIL 47
+#define EISCONN 48
+#define ECONNABORTED 49
+#define EALREADY 50
+#define ECONNRESET 51
+#define EDESTADDRREQ 52
+#define EHOSTUNREACH 53
+#define EILSEQ 54
+#define EMSGSIZE 55
+#define ENETDOWN 56
+#define ENETUNREACH 57
+#define ENETRESET 58
+#define ENOBUFS 59
+#define ENOLCK 60
+#define ENOMSG 61
+#define ENOPROTOOPT 62
+#define ENOTCONN 63
+#define ESHUTDOWN 64
+#define ETOOMANYREFS 65
+#define EPROTONOSUPPORT 66
+#define ESOCKTNOSUPPORT 67
+#define EDEADLK 68
+#define ETIMEDOUT 69
+#define EPROTOTYPE 70
+#define EINPROGRESS 71
+#define ENOTHREAD 72
+#define EPROTO 73
+#define ENOTSUP 74
+#define EPFNOSUPPORT 75
+#define EDQUOT 76
+#define EDIRINTOSELF 77
+#define ENOTRECOVERABLE 78
+#define ECANCELED 79
+#define EMAXERRNO 80
+
+
+#define EWOULDBLOCK EAGAIN //Serenity doesn't define it
+#define ENODATA EMAXERRNO
+#endif
+
 /* To be able to name the Java constants the same as the C constants without
    having the preprocessor rewrite those identifiers, add PREFIX_ to all
    identifiers matching a C constant. The PREFIX_ is filtered out in the
@@ -120,7 +210,7 @@ class UnixConstants {
 // fgetxattr error codes for absent attributes depend on the OS:
 #ifdef _ALLBSD_SOURCE
     static final int PREFIX_XATTR_NOT_FOUND = ENOATTR;
-#elif __linux__
+#elif defined(__linux__)
     static final int PREFIX_XATTR_NOT_FOUND = ENODATA;
 #else
     // not supported (dummy values will not be used at runtime).
diff --git a/src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c b/src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
index d53e88764..eddb5f169 100644
--- a/src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
+++ b/src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
@@ -488,7 +488,7 @@ void unix_getUserInfo(JNIEnv* env, jobject jinfo, uid_t uid) {
  * The following functions are common on Solaris, Linux and AIX.
  */
 
-#if defined (__linux__) || defined(_AIX)
+#if defined (__linux__) || defined(_AIX) || defined(SERENITY)
 
 /*
  * Returns the children of the requested pid and optionally each parent and
diff --git a/src/java.base/unix/native/libjava/TimeZone_md.c b/src/java.base/unix/native/libjava/TimeZone_md.c
index 94dfc207f..2a6c3851a 100644
--- a/src/java.base/unix/native/libjava/TimeZone_md.c
+++ b/src/java.base/unix/native/libjava/TimeZone_md.c
@@ -53,7 +53,7 @@ static char *isFileIdentical(char* buf, size_t size, char *pathname);
 #define filegets        fgets
 #define fileclose       fclose
 
-#if defined(_ALLBSD_SOURCE)
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #define stat64 stat
 #define lstat64 lstat
 #define fstat64 fstat
@@ -75,7 +75,7 @@ static const char popularZones[][4] = {"UTC", "GMT"};
 static const char *ETC_ENVIRONMENT_FILE = "/etc/environment";
 #endif
 
-#if defined(__linux__) || defined(MACOSX)
+#if defined(__linux__) || defined(MACOSX) || defined(SERENITY)
 
 /*
  * Returns a pointer to the zone ID portion of the given zoneinfo file
diff --git a/src/java.base/unix/native/libjava/io_util_md.c b/src/java.base/unix/native/libjava/io_util_md.c
index e207c57d4..8afabc544 100644
--- a/src/java.base/unix/native/libjava/io_util_md.c
+++ b/src/java.base/unix/native/libjava/io_util_md.c
@@ -30,7 +30,7 @@
 #include <string.h>
 #include <unistd.h>
 
-#if defined(__linux__) || defined(_ALLBSD_SOURCE) || defined(_AIX)
+#if defined(__linux__) || defined(_ALLBSD_SOURCE) || defined(_AIX) || defined(SERENITY)
 #include <sys/ioctl.h>
 #endif
 
diff --git a/src/java.base/unix/native/libjava/io_util_md.h b/src/java.base/unix/native/libjava/io_util_md.h
index 3dccf64f4..3e9e7d3b0 100644
--- a/src/java.base/unix/native/libjava/io_util_md.h
+++ b/src/java.base/unix/native/libjava/io_util_md.h
@@ -66,7 +66,7 @@ FD getFD(JNIEnv *env, jobject cur, jfieldID fid);
 #define IO_SetLength handleSetLength
 #define IO_GetLength handleGetLength
 
-#ifdef _ALLBSD_SOURCE
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #define open64 open
 #define fstat64 fstat
 #define stat64 stat
@@ -77,6 +77,10 @@ FD getFD(JNIEnv *env, jobject cur, jfieldID fid);
 #define IO_Lseek lseek64
 #endif
 
+#ifdef SERENITY
+#define statvfs64 statvfs
+#endif
+
 /*
  * On Solaris, the handle field is unused
  */
diff --git a/src/java.base/unix/native/libjsig/jsig.c b/src/java.base/unix/native/libjsig/jsig.c
index 1108b2f9c..d891aab93 100644
--- a/src/java.base/unix/native/libjsig/jsig.c
+++ b/src/java.base/unix/native/libjsig/jsig.c
@@ -100,6 +100,10 @@ static sa_handler_t call_os_signal(int sig, sa_handler_t disp,
                                    bool is_sigset) {
   sa_handler_t res;
 
+#ifdef SERENITY
+#define RTLD_NEXT 0 //stub out RTLD_NEXT
+#endif
+
   if (os_signal == NULL) {
     // Deprecation warning first time through
     printf(HOTSPOT_VM_DISTRO " VM warning: the use of signal() and sigset() "
diff --git a/src/java.base/unix/native/libnet/Inet4AddressImpl.c b/src/java.base/unix/native/libnet/Inet4AddressImpl.c
index b165be7ce..a4cd70003 100644
--- a/src/java.base/unix/native/libnet/Inet4AddressImpl.c
+++ b/src/java.base/unix/native/libnet/Inet4AddressImpl.c
@@ -335,6 +335,7 @@ static jboolean
 ping4(JNIEnv *env, jint fd, SOCKETADDRESS *sa, SOCKETADDRESS *netif,
       jint timeout, jint ttl)
 {
+#ifndef SERENITY
     jint n, size = 60 * 1024, hlen, tmout2, seq = 1;
     socklen_t len;
     unsigned char sendbuf[1500], recvbuf[1500];
@@ -438,6 +439,8 @@ ping4(JNIEnv *env, jint fd, SOCKETADDRESS *sa, SOCKETADDRESS *netif,
         timeout -= 1000;
     } while (timeout > 0);
     close(fd);
+#endif
+    //FIXME implement setsockopt(IPPROTO_IP)
     return JNI_FALSE;
 }
 
diff --git a/src/java.base/unix/native/libnet/Inet6AddressImpl.c b/src/java.base/unix/native/libnet/Inet6AddressImpl.c
index 058f3d3a7..61460fda8 100644
--- a/src/java.base/unix/native/libnet/Inet6AddressImpl.c
+++ b/src/java.base/unix/native/libnet/Inet6AddressImpl.c
@@ -29,7 +29,9 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <netinet/in.h>
+#ifndef SERENITY
 #include <netinet/icmp6.h>
+#endif
 
 #if defined(_ALLBSD_SOURCE)
 #include <ifaddrs.h>
@@ -539,6 +541,7 @@ static jboolean
 ping6(JNIEnv *env, jint fd, SOCKETADDRESS *sa, SOCKETADDRESS *netif,
       jint timeout, jint ttl)
 {
+#ifndef SERENITY
     jint n, size = 60 * 1024, tmout2, seq = 1;
     socklen_t len;
     unsigned char sendbuf[1500], recvbuf[1500];
@@ -643,6 +646,7 @@ ping6(JNIEnv *env, jint fd, SOCKETADDRESS *sa, SOCKETADDRESS *netif,
         timeout -= 1000;
     } while (timeout > 0);
     close(fd);
+#endif
     return JNI_FALSE;
 }
 
diff --git a/src/java.base/unix/native/libnet/NetworkInterface.c b/src/java.base/unix/native/libnet/NetworkInterface.c
index 990bc1bcc..fdeff2bf6 100644
--- a/src/java.base/unix/native/libnet/NetworkInterface.c
+++ b/src/java.base/unix/native/libnet/NetworkInterface.c
@@ -43,6 +43,10 @@
 #include <ifaddrs.h>
 #endif
 
+#if defined(SERENITY)
+#include <ifaddrs.h>
+#endif
+
 #include "net_util.h"
 
 #include "java_net_InetAddress.h"
@@ -1351,7 +1355,7 @@ static int getMacAddress
 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
     struct ifreq if2;
     memset((char *)&if2, 0, sizeof(if2));
-    strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
+    memcpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
 
     if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
         JNU_ThrowByNameWithMessageAndLastError
@@ -1664,7 +1668,7 @@ static int getFlags(int sock, const char *ifname, int *flags) {
 #endif /* _AIX */
 
 /** BSD **/
-#if defined(_ALLBSD_SOURCE)
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 
 /*
  * Opens a socket for further ioctl calls. Tries AF_INET socket first and
@@ -1803,6 +1807,7 @@ static int getMacAddress
   (JNIEnv *env, const char *ifname, const struct in_addr *addr,
    unsigned char *buf)
 {
+#ifndef SERENITY // FIXME: define sockaddr_dl in net/if_dl.h
     struct ifaddrs *ifa0, *ifa;
     struct sockaddr *saddr;
     int i;
@@ -1827,7 +1832,7 @@ static int getMacAddress
         }
         freeifaddrs(ifa0);
     }
-
+#endif
     return -1;
 }
 
diff --git a/src/java.base/unix/native/libnet/net_util_md.h b/src/java.base/unix/native/libnet/net_util_md.h
index 68835987b..f99b11207 100644
--- a/src/java.base/unix/native/libnet/net_util_md.h
+++ b/src/java.base/unix/native/libnet/net_util_md.h
@@ -30,6 +30,10 @@
 #include <poll.h>
 #include <sys/socket.h>
 
+#ifdef SERENITY
+#include <netinet/in.h>
+#endif
+
 /************************************************************************
  * Macros and constants
  */
diff --git a/src/java.base/unix/native/libnio/MappedMemoryUtils.c b/src/java.base/unix/native/libnio/MappedMemoryUtils.c
index e90acd286..34787fff4 100644
--- a/src/java.base/unix/native/libnio/MappedMemoryUtils.c
+++ b/src/java.base/unix/native/libnio/MappedMemoryUtils.c
@@ -58,6 +58,7 @@ JNIEXPORT jboolean JNICALL
 Java_java_nio_MappedMemoryUtils_isLoaded0(JNIEnv *env, jobject obj, jlong address,
                                          jlong len, jlong numPages)
 {
+#ifndef SERENITY
     jboolean loaded = JNI_TRUE;
     int result = 0;
     long i = 0;
@@ -100,6 +101,9 @@ Java_java_nio_MappedMemoryUtils_isLoaded0(JNIEnv *env, jobject obj, jlong addres
     }
     free(vec);
     return loaded;
+#else
+    return JNI_FALSE; //FIXME implement mincore() or equivalent
+#endif
 }
 
 
diff --git a/src/java.base/unix/native/libnio/ch/FileChannelImpl.c b/src/java.base/unix/native/libnio/ch/FileChannelImpl.c
index 8cc753e6a..28fa55269 100644
--- a/src/java.base/unix/native/libnio/ch/FileChannelImpl.c
+++ b/src/java.base/unix/native/libnio/ch/FileChannelImpl.c
@@ -39,6 +39,9 @@
 #include <sys/uio.h>
 #define lseek64 lseek
 #define mmap64 mmap
+#elif defined(SERENITY)
+#define lseek64 lseek
+#define mmap64 mmap
 #endif
 
 #include "jni.h"
diff --git a/src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c b/src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c
index c0c31d6ab..3a4d8a632 100644
--- a/src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c
+++ b/src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c
@@ -40,7 +40,7 @@
 #include <sys/ioctl.h>
 #endif
 
-#if defined(_ALLBSD_SOURCE)
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #define lseek64 lseek
 #define stat64 stat
 #define flock64 flock
@@ -54,6 +54,11 @@
 #define fdatasync fsync
 #endif
 
+#ifdef SERENITY
+#define statvfs64 statvfs
+#define fstatvfs64 fstatvfs
+#endif
+
 #include "jni.h"
 #include "jni_util.h"
 #include "jvm.h"
diff --git a/src/java.base/unix/native/libnio/ch/FileKey.c b/src/java.base/unix/native/libnio/ch/FileKey.c
index bdb42a632..a433cdf01 100644
--- a/src/java.base/unix/native/libnio/ch/FileKey.c
+++ b/src/java.base/unix/native/libnio/ch/FileKey.c
@@ -30,7 +30,7 @@
 #include "nio_util.h"
 #include "sun_nio_ch_FileKey.h"
 
-#ifdef _ALLBSD_SOURCE
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #define stat64 stat
 
 #define fstat64 fstat
diff --git a/src/java.base/unix/native/libnio/ch/NativeThread.c b/src/java.base/unix/native/libnio/ch/NativeThread.c
index 92dcb9e56..4bf09d03b 100644
--- a/src/java.base/unix/native/libnio/ch/NativeThread.c
+++ b/src/java.base/unix/native/libnio/ch/NativeThread.c
@@ -40,7 +40,7 @@
 #elif defined(_AIX)
   /* Also defined in net/aix_close.c */
   #define INTERRUPT_SIGNAL (SIGRTMAX - 1)
-#elif defined(_ALLBSD_SOURCE)
+#elif defined(_ALLBSD_SOURCE) || defined(SERENITY)
   /* Also defined in net/bsd_close.c */
   #define INTERRUPT_SIGNAL SIGIO
 #else
diff --git a/src/java.base/unix/native/libnio/ch/Net.c b/src/java.base/unix/native/libnio/ch/Net.c
index 42a07359d..ca1401861 100644
--- a/src/java.base/unix/native/libnio/ch/Net.c
+++ b/src/java.base/unix/native/libnio/ch/Net.c
@@ -701,7 +701,7 @@ JNIEXPORT jint JNICALL
 Java_sun_nio_ch_Net_blockOrUnblock6(JNIEnv *env, jobject this, jboolean block, jobject fdo,
                                     jbyteArray group, jint index, jbyteArray source)
 {
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(SERENITY)
     /* no IPv6 exclude-mode filtering for now */
     return IOS_UNAVAILABLE;
 #else
diff --git a/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c b/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
index 9df8be1e6..993e240db 100644
--- a/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
+++ b/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
@@ -57,7 +57,7 @@
 #include <string.h>
 #endif
 
-#ifdef _ALLBSD_SOURCE
+#if defined(_ALLBSD_SOURCE) || defined(SERENITY)
 #include <string.h>
 
 #define stat64 stat
@@ -1114,6 +1114,7 @@ Java_sun_nio_fs_UnixNativeDispatcher_getgrgid(JNIEnv* env, jclass this, jint gid
     int retry;
 
     /* initial size of buffer for group record */
+#ifndef SERENITY
     buflen = (int)sysconf(_SC_GETGR_R_SIZE_MAX);
     if (buflen == -1)
         buflen = ENT_BUF_SIZE;
@@ -1156,6 +1157,24 @@ Java_sun_nio_fs_UnixNativeDispatcher_getgrgid(JNIEnv* env, jclass this, jint gid
 
     } while (retry);
 
+#else
+    // FIXME: Not thread safe, implement getgrgid_r
+    errno = 0;
+    struct group * g = getgrgid(gid);
+    if (g == NULL || g->gr_name == NULL || *(g->gr_name) == '\0') {
+        if (errno == 0)
+            errno = ENOENT;
+        throwUnixException(env, errno);
+    }
+    else {
+        jsize len = strlen(g->gr_name);
+        result = (*env)->NewByteArray(env, len);
+        if (result != NULL) {
+            (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)(g->gr_name));
+        }
+    }
+#endif
+
     return result;
 }
 
@@ -1204,6 +1223,7 @@ Java_sun_nio_fs_UnixNativeDispatcher_getgrnam0(JNIEnv* env, jclass this,
     jlong nameAddress)
 {
     jint gid = -1;
+#ifndef SERENITY
     int buflen, retry;
 
     /* initial size of buffer for group record */
@@ -1248,6 +1268,23 @@ Java_sun_nio_fs_UnixNativeDispatcher_getgrnam0(JNIEnv* env, jclass this,
         free(grbuf);
 
     } while (retry);
+#else
+    // FIXME: Not thread safe, implement getgrnam_r
+    const char* name = (const char*)jlong_to_ptr(nameAddress);
+    errno = 0;
+    struct group * g = getgrnam(name);
+    if (g == NULL || g->gr_name == NULL || *(g->gr_name) == '\0') {
+        /* not found or error */
+        if (errno != 0 && errno != ENOENT && errno != ESRCH &&
+            errno != EBADF && errno != EPERM)
+        {
+            throwUnixException(env, errno);
+        }
+    }
+    else {
+        gid = g->gr_gid;
+    }
+#endif
 
     return gid;
 }