--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/solaris/bin/java_md_common.c Tue Mar 06 20:34:38 2012 +0000
@@ -0,0 +1,504 @@
+/*
+ * Copyright (c) 2012, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+#include "java.h"
+
+/*
+ * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
+ * "/foo" into buf.
+ */
+jboolean
+GetApplicationHome(char *buf, jint bufsize)
+{
+ const char *execname = GetExecName();
+ if (execname != NULL) {
+ JLI_Snprintf(buf, bufsize, "%s", execname);
+ buf[bufsize-1] = '\0';
+ } else {
+ return JNI_FALSE;
+ }
+
+ if (JLI_StrRChr(buf, '/') == 0) {
+ buf[0] = '\0';
+ return JNI_FALSE;
+ }
+ *(JLI_StrRChr(buf, '/')) = '\0'; /* executable file */
+ if (JLI_StrLen(buf) < 4 || JLI_StrRChr(buf, '/') == 0) {
+ buf[0] = '\0';
+ return JNI_FALSE;
+ }
+ if (JLI_StrCmp("/bin", buf + JLI_StrLen(buf) - 4) != 0)
+ *(JLI_StrRChr(buf, '/')) = '\0'; /* sparcv9 or amd64 */
+ if (JLI_StrLen(buf) < 4 || JLI_StrCmp("/bin", buf + JLI_StrLen(buf) - 4) != 0) {
+ buf[0] = '\0';
+ return JNI_FALSE;
+ }
+ *(JLI_StrRChr(buf, '/')) = '\0'; /* bin */
+
+ return JNI_TRUE;
+}
+/*
+ * Return true if the named program exists
+ */
+static int
+ProgramExists(char *name)
+{
+ struct stat sb;
+ if (stat(name, &sb) != 0) return 0;
+ if (S_ISDIR(sb.st_mode)) return 0;
+ return (sb.st_mode & S_IEXEC) != 0;
+}
+
+/*
+ * Find a command in a directory, returning the path.
+ */
+static char *
+Resolve(char *indir, char *cmd)
+{
+ char name[PATH_MAX + 2], *real;
+
+ if ((JLI_StrLen(indir) + JLI_StrLen(cmd) + 1) > PATH_MAX) return 0;
+ JLI_Snprintf(name, sizeof(name), "%s%c%s", indir, FILE_SEPARATOR, cmd);
+ if (!ProgramExists(name)) return 0;
+ real = JLI_MemAlloc(PATH_MAX + 2);
+ if (!realpath(name, real))
+ JLI_StrCpy(real, name);
+ return real;
+}
+
+/*
+ * Find a path for the executable
+ */
+char *
+FindExecName(char *program)
+{
+ char cwdbuf[PATH_MAX+2];
+ char *path;
+ char *tmp_path;
+ char *f;
+ char *result = NULL;
+
+ /* absolute path? */
+ if (*program == FILE_SEPARATOR ||
+ (FILE_SEPARATOR=='\\' && JLI_StrRChr(program, ':')))
+ return Resolve("", program+1);
+
+ /* relative path? */
+ if (JLI_StrRChr(program, FILE_SEPARATOR) != 0) {
+ char buf[PATH_MAX+2];
+ return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
+ }
+
+ /* from search path? */
+ path = getenv("PATH");
+ if (!path || !*path) path = ".";
+ tmp_path = JLI_MemAlloc(JLI_StrLen(path) + 2);
+ JLI_StrCpy(tmp_path, path);
+
+ for (f=tmp_path; *f && result==0; ) {
+ char *s = f;
+ while (*f && (*f != PATH_SEPARATOR)) ++f;
+ if (*f) *f++ = 0;
+ if (*s == FILE_SEPARATOR)
+ result = Resolve(s, program);
+ else {
+ /* relative path element */
+ char dir[2*PATH_MAX];
+ JLI_Snprintf(dir, sizeof(dir), "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
+ FILE_SEPARATOR, s);
+ result = Resolve(dir, program);
+ }
+ if (result != 0) break;
+ }
+
+ JLI_MemFree(tmp_path);
+ return result;
+}
+
+void JLI_ReportErrorMessage(const char* fmt, ...) {
+ va_list vl;
+ va_start(vl, fmt);
+ vfprintf(stderr, fmt, vl);
+ fprintf(stderr, "\n");
+ va_end(vl);
+}
+
+void JLI_ReportErrorMessageSys(const char* fmt, ...) {
+ va_list vl;
+ char *emsg;
+
+ /*
+ * TODO: its safer to use strerror_r but is not available on
+ * Solaris 8. Until then....
+ */
+ emsg = strerror(errno);
+ if (emsg != NULL) {
+ fprintf(stderr, "%s\n", emsg);
+ }
+
+ va_start(vl, fmt);
+ vfprintf(stderr, fmt, vl);
+ fprintf(stderr, "\n");
+ va_end(vl);
+}
+
+void JLI_ReportExceptionDescription(JNIEnv * env) {
+ (*env)->ExceptionDescribe(env);
+}
+
+/*
+ * Since using the file system as a registry is a bit risky, perform
+ * additional sanity checks on the identified directory to validate
+ * it as a valid jre/sdk.
+ *
+ * Return 0 if the tests fail; otherwise return non-zero (true).
+ *
+ * Note that checking for anything more than the existence of an
+ * executable object at bin/java relative to the path being checked
+ * will break the regression tests.
+ */
+static int
+CheckSanity(char *path, char *dir)
+{
+ char buffer[PATH_MAX];
+
+ if (JLI_StrLen(path) + JLI_StrLen(dir) + 11 > PATH_MAX)
+ return (0); /* Silently reject "impossibly" long paths */
+
+ JLI_Snprintf(buffer, sizeof(buffer), "%s/%s/bin/java", path, dir);
+ return ((access(buffer, X_OK) == 0) ? 1 : 0);
+}
+
+/*
+ * Determine if there is an acceptable JRE in the directory dirname.
+ * Upon locating the "best" one, return a fully qualified path to
+ * it. "Best" is defined as the most advanced JRE meeting the
+ * constraints contained in the manifest_info. If no JRE in this
+ * directory meets the constraints, return NULL.
+ *
+ * Note that we don't check for errors in reading the directory
+ * (which would be done by checking errno). This is because it
+ * doesn't matter if we get an error reading the directory, or
+ * we just don't find anything interesting in the directory. We
+ * just return NULL in either case.
+ *
+ * The historical names of j2sdk and j2re were changed to jdk and
+ * jre respecively as part of the 1.5 rebranding effort. Since the
+ * former names are legacy on Linux, they must be recognized for
+ * all time. Fortunately, this is a minor cost.
+ */
+static char
+*ProcessDir(manifest_info *info, char *dirname)
+{
+ DIR *dirp;
+ struct dirent *dp;
+ char *best = NULL;
+ int offset;
+ int best_offset = 0;
+ char *ret_str = NULL;
+ char buffer[PATH_MAX];
+
+ if ((dirp = opendir(dirname)) == NULL)
+ return (NULL);
+
+ do {
+ if ((dp = readdir(dirp)) != NULL) {
+ offset = 0;
+ if ((JLI_StrNCmp(dp->d_name, "jre", 3) == 0) ||
+ (JLI_StrNCmp(dp->d_name, "jdk", 3) == 0))
+ offset = 3;
+ else if (JLI_StrNCmp(dp->d_name, "j2re", 4) == 0)
+ offset = 4;
+ else if (JLI_StrNCmp(dp->d_name, "j2sdk", 5) == 0)
+ offset = 5;
+ if (offset > 0) {
+ if ((JLI_AcceptableRelease(dp->d_name + offset,
+ info->jre_version)) && CheckSanity(dirname, dp->d_name))
+ if ((best == NULL) || (JLI_ExactVersionId(
+ dp->d_name + offset, best + best_offset) > 0)) {
+ if (best != NULL)
+ JLI_MemFree(best);
+ best = JLI_StringDup(dp->d_name);
+ best_offset = offset;
+ }
+ }
+ }
+ } while (dp != NULL);
+ (void) closedir(dirp);
+ if (best == NULL)
+ return (NULL);
+ else {
+ ret_str = JLI_MemAlloc(JLI_StrLen(dirname) + JLI_StrLen(best) + 2);
+ sprintf(ret_str, "%s/%s", dirname, best);
+ JLI_MemFree(best);
+ return (ret_str);
+ }
+}
+
+/*
+ * This is the global entry point. It examines the host for the optimal
+ * JRE to be used by scanning a set of directories. The set of directories
+ * is platform dependent and can be overridden by the environment
+ * variable JAVA_VERSION_PATH.
+ *
+ * This routine itself simply determines the set of appropriate
+ * directories before passing control onto ProcessDir().
+ */
+char*
+LocateJRE(manifest_info* info)
+{
+ char *path;
+ char *home;
+ char *target = NULL;
+ char *dp;
+ char *cp;
+
+ /*
+ * Start by getting JAVA_VERSION_PATH
+ */
+ if (info->jre_restrict_search) {
+ path = JLI_StringDup(system_dir);
+ } else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) {
+ path = JLI_StringDup(path);
+ } else {
+ if ((home = getenv("HOME")) != NULL) {
+ path = (char *)JLI_MemAlloc(JLI_StrLen(home) + \
+ JLI_StrLen(system_dir) + JLI_StrLen(user_dir) + 2);
+ sprintf(path, "%s%s:%s", home, user_dir, system_dir);
+ } else {
+ path = JLI_StringDup(system_dir);
+ }
+ }
+
+ /*
+ * Step through each directory on the path. Terminate the scan with
+ * the first directory with an acceptable JRE.
+ */
+ cp = dp = path;
+ while (dp != NULL) {
+ cp = JLI_StrChr(dp, (int)':');
+ if (cp != NULL)
+ *cp = '\0';
+ if ((target = ProcessDir(info, dp)) != NULL)
+ break;
+ dp = cp;
+ if (dp != NULL)
+ dp++;
+ }
+ JLI_MemFree(path);
+ return (target);
+}
+
+/*
+ * Given a path to a jre to execute, this routine checks if this process
+ * is indeed that jre. If not, it exec's that jre.
+ *
+ * We want to actually check the paths rather than just the version string
+ * built into the executable, so that given version specification (and
+ * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
+ * of the version of the arbitrary launcher we start with.
+ */
+void
+ExecJRE(char *jre, char **argv)
+{
+ char wanted[PATH_MAX];
+ const char* progname = GetProgramName();
+ const char* execname = NULL;
+
+ /*
+ * Resolve the real path to the directory containing the selected JRE.
+ */
+ if (realpath(jre, wanted) == NULL) {
+ JLI_ReportErrorMessage(JRE_ERROR9, jre);
+ exit(1);
+ }
+
+ /*
+ * Resolve the real path to the currently running launcher.
+ */
+ SetExecname(argv);
+ execname = GetExecName();
+ if (execname == NULL) {
+ JLI_ReportErrorMessage(JRE_ERROR10);
+ exit(1);
+ }
+
+ /*
+ * If the path to the selected JRE directory is a match to the initial
+ * portion of the path to the currently executing JRE, we have a winner!
+ * If so, just return.
+ */
+ if (JLI_StrNCmp(wanted, execname, JLI_StrLen(wanted)) == 0)
+ return; /* I am the droid you were looking for */
+
+
+ /*
+ * This should never happen (because of the selection code in SelectJRE),
+ * but check for "impossibly" long path names just because buffer overruns
+ * can be so deadly.
+ */
+ if (JLI_StrLen(wanted) + JLI_StrLen(progname) + 6 > PATH_MAX) {
+ JLI_ReportErrorMessage(JRE_ERROR11);
+ exit(1);
+ }
+
+ /*
+ * Construct the path and exec it.
+ */
+ (void)JLI_StrCat(JLI_StrCat(wanted, "/bin/"), progname);
+ argv[0] = JLI_StringDup(progname);
+ if (JLI_IsTraceLauncher()) {
+ int i;
+ printf("ReExec Command: %s (%s)\n", wanted, argv[0]);
+ printf("ReExec Args:");
+ for (i = 1; argv[i] != NULL; i++)
+ printf(" %s", argv[i]);
+ printf("\n");
+ }
+ JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n");
+ (void)fflush(stdout);
+ (void)fflush(stderr);
+ execv(wanted, argv);
+ JLI_ReportErrorMessageSys(JRE_ERROR12, wanted);
+ exit(1);
+}
+
+/*
+ * "Borrowed" from Solaris 10 where the unsetenv() function is being added
+ * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
+ * such, in the fullness of time this will appear in libc on all relevant
+ * Solaris/Linux platforms and maybe even the Windows platform. At that
+ * time, this stub can be removed.
+ *
+ * This implementation removes the environment locking for multithreaded
+ * applications. (We don't have access to these mutexes within libc and
+ * the launcher isn't multithreaded.) Note that what remains is platform
+ * independent, because it only relies on attributes that a POSIX environment
+ * defines.
+ *
+ * Returns 0 on success, -1 on failure.
+ *
+ * Also removed was the setting of errno. The only value of errno set
+ * was EINVAL ("Invalid Argument").
+ */
+
+/*
+ * s1(environ) is name=value
+ * s2(name) is name(not the form of name=value).
+ * if names match, return value of 1, else return 0
+ */
+static int
+match_noeq(const char *s1, const char *s2)
+{
+ while (*s1 == *s2++) {
+ if (*s1++ == '=')
+ return (1);
+ }
+ if (*s1 == '=' && s2[-1] == '\0')
+ return (1);
+ return (0);
+}
+
+/*
+ * added for SUSv3 standard
+ *
+ * Delete entry from environ.
+ * Do not free() memory! Other threads may be using it.
+ * Keep it around forever.
+ */
+static int
+borrowed_unsetenv(const char *name)
+{
+ long idx; /* index into environ */
+
+ if (name == NULL || *name == '\0' ||
+ JLI_StrChr(name, '=') != NULL) {
+ return (-1);
+ }
+
+ for (idx = 0; environ[idx] != NULL; idx++) {
+ if (match_noeq(environ[idx], name))
+ break;
+ }
+ if (environ[idx] == NULL) {
+ /* name not found but still a success */
+ return (0);
+ }
+ /* squeeze up one entry */
+ do {
+ environ[idx] = environ[idx+1];
+ } while (environ[++idx] != NULL);
+
+ return (0);
+}
+/* --- End of "borrowed" code --- */
+
+/*
+ * Wrapper for unsetenv() function.
+ */
+int
+UnsetEnv(char *name)
+{
+ return(borrowed_unsetenv(name));
+}
+
+const char *
+jlong_format_specifier() {
+ return "%lld";
+}
+
+jboolean
+IsJavaw()
+{
+ /* noop on UNIX */
+ return JNI_FALSE;
+}
+
+void
+InitLauncher(jboolean javaw)
+{
+ JLI_SetTraceLauncher();
+}
+
+/*
+ * The implementation for finding classes from the bootstrap
+ * class loader, refer to java.h
+ */
+static FindClassFromBootLoader_t *findBootClass = NULL;
+
+jclass
+FindBootStrapClass(JNIEnv *env, const char* classname)
+{
+ if (findBootClass == NULL) {
+ findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT,
+ "JVM_FindClassFromBootLoader");
+ if (findBootClass == NULL) {
+ JLI_ReportErrorMessage(DLL_ERROR4,
+ "JVM_FindClassFromBootLoader");
+ return NULL;
+ }
+ }
+ return findBootClass(env, classname);
+}
+