8289768: Clean up unused code

Reviewed-by: dfuchs, lancea, weijun, naoto, cjplummer, alanb, michaelm, chegar

src/java.base/unix/native/jspawnhelper/jspawnhelper.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -71,9 +71,6 @@ void shutItDown() {
  * - the data strings for fields in ChildStuff
  */
 void initChildStuff (int fdin, int fdout, ChildStuff *c) {
-    int n;
-    int argvBytes, nargv, envvBytes, nenvv;
-    int dirlen;
     char *buf;
     SpawnInfo sp;
     int bufsize, offset=0;
@@ -132,7 +129,6 @@ void initChildStuff (int fdin, int fdout, ChildStuff *c) {
 
 int main(int argc, char *argv[]) {
     ChildStuff c;
-    int t;
     struct stat buf;
     /* argv[0] contains the fd number to read all the child info */
     int r, fdin, fdout;

src/java.base/unix/native/libjava/ProcessImpl_md.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1995, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -399,10 +399,8 @@ copyPipe(int from[2], int to[2])
  */
 static void arraysize(const char * const *arg, int *nelems, int *nbytes)
 {
-    int i, bytes, count;
+    int bytes, count;
     const char * const *a = arg;
-    char *p;
-    int *q;
     if (arg == 0) {
         *nelems = 0;
         *nbytes = 0;
@@ -488,7 +486,6 @@ forkChild(ChildStuff *c) {
 static pid_t
 spawnChild(JNIEnv *env, jobject process, ChildStuff *c, const char *helperpath) {
     pid_t resultPid;
-    jboolean isCopy;
     int i, offset, rval, bufsize, magic;
     char *buf, buf1[16];
     char *hlpargs[2];

src/java.base/unix/native/libjava/TimeZone_md.c

@@ -151,7 +151,6 @@ findZoneinfoFile(char *buf, size_t size, const char *dir)
     struct dirent *dp = NULL;
     char *pathname = NULL;
     char *tz = NULL;
-    int res;
 
     if (strcmp(dir, ZONEINFO_DIR) == 0) {
         /* fast path for 1st iteration */

src/java.base/unix/native/libjava/java_props_md.c

@@ -353,7 +353,6 @@ java_props_t *
 GetJavaProperties(JNIEnv *env)
 {
     static java_props_t sprops;
-    char *v; /* tmp var */
 
     if (sprops.user_dir) {
         return &sprops;

src/java.base/unix/native/libjava/path_util.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -119,7 +119,6 @@ collapse(char *path)
     int nc;
     char **ix;
     int i, j;
-    char *p, *q;
 
     nc = collapsible(names);
     if (nc < 2) return;         /* Nothing to do */

src/java.base/unix/native/libjli/java_md.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -298,7 +298,6 @@ CreateExecutionEnvironment(int *pargc, char ***pargv,
                            char jvmcfg[],  jint so_jvmcfg) {
 
     char * jvmtype = NULL;
-    int argc = *pargc;
     char **argv = *pargv;
 
 #ifdef SETENV_REQUIRED

src/java.base/unix/native/libjli/java_md_common.c

@@ -159,7 +159,6 @@ FindExecName(char *program)
 
     /* relative path? */
     if (JLI_StrRChr(program, FILE_SEPARATOR) != NULL) {
-        char buf[PATH_MAX+2];
         return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
     }
 

src/java.base/unix/native/libnet/DefaultProxySelector.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -237,7 +237,6 @@ static jobjectArray getProxyByGConf(JNIEnv *env, const char* cproto,
     }
 
     if (use_proxy) {
-        jstring jhost;
         char *noproxyfor;
         char *s;
 

src/java.base/unix/native/libnet/Inet6AddressImpl.c

@@ -81,8 +81,7 @@ lookupIfLocalhost(JNIEnv *env, const char *hostname, jboolean includeV6, int cha
     jobjectArray result = NULL;
     char myhostname[NI_MAXHOST + 1];
     struct ifaddrs *ifa = NULL;
-    int familyOrder = 0;
-    int count = 0, i, j;
+    int i, j;
     int addrs4 = 0, addrs6 = 0, numV4Loopbacks = 0, numV6Loopbacks = 0;
     jboolean includeLoopback = JNI_FALSE;
     jobject name;

src/java.base/unix/native/libnet/NetworkInterface.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -704,7 +704,6 @@ static jobject createNetworkInterface(JNIEnv *env, netif *ifs) {
     jobjectArray addrArr;
     jobjectArray bindArr;
     jobjectArray childArr;
-    netaddr *addrs;
     jint addr_index, addr_count, bind_index;
     jint child_count, child_index;
     netaddr *addrP;
@@ -902,7 +901,6 @@ static netif *enumInterfaces(JNIEnv *env) {
  */
 static void freeif(netif *ifs) {
     netif *currif = ifs;
-    netif *child = NULL;
 
     while (currif != NULL) {
         netaddr *addrP = currif->addr;

src/java.base/unix/native/libnet/net_util_md.c

@@ -680,7 +680,6 @@ int
 NET_Bind(int fd, SOCKETADDRESS *sa, int len)
 {
     int rv;
-    int arg, alen;
 
 #ifdef __linux__
     /*

src/java.base/unix/native/libnio/ch/NativeThread.c

@@ -62,7 +62,6 @@ Java_sun_nio_ch_NativeThread_init(JNIEnv *env, jclass cl)
      * should somehow be unified, perhaps within the VM.
      */
 
-    sigset_t ss;
     struct sigaction sa, osa;
     sa.sa_handler = nullHandler;
     sa.sa_flags = 0;

src/java.base/unix/native/libnio/ch/Net.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -529,7 +529,6 @@ Java_sun_nio_ch_Net_setIntOption0(JNIEnv *env, jclass clazz, jobject fdo,
                                   jboolean mayNeedConversion, jint level,
                                   jint opt, jint arg, jboolean isIPv6)
 {
-    int result;
     struct linger linger;
     u_char carg;
     void *parg;

src/java.base/unix/native/libnio/ch/UnixDomainSockets.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -184,7 +184,6 @@ Java_sun_nio_ch_UnixDomainSockets_localAddress0(JNIEnv *env, jclass clazz, jobje
 {
     struct sockaddr_un sa;
     socklen_t sa_len = sizeof(struct sockaddr_un);
-    int port;
     if (getsockname(fdval(env, fdo), (struct sockaddr *)&sa, &sa_len) < 0) {
         handleSocketError(env, errno);
         return NULL;