. Using dladdr(3) to determine the path to the current executable, and

  hence the path for the shared libraries doesn't always work on FreeBSD.
  It definitely fails on FreeBSD 4.11 and FreeBSD 6-CURRENT under the
  tested environments.  In fact, the dladdr(3) man page even warns of
  these problems.  While there is work under way to fix this, it isn't
  available yet.

  Given that situation, switch to trying /proc/curproc/file, which is
  similar to what Linux does, and if that fails, drop back to checking
  argv[0] and iterating through $PATH as in jdk 1.4.  Both these methods
  work correctly in testing.

Reported by:	das
Reviewed by:	maintainer timeout

1 files changed, 62 insertions, 0 deletions

diff --git a/java/jdk16/files/patch-j2se-bin-java_md.c b/java/jdk16/files/patch-j2se-bin-java_md.c
new file mode 100644
index 000000000000..f8305b53ae46
--- /dev/null
+++ b/java/jdk16/files/patch-j2se-bin-java_md.c
@@ -0,0 +1,62 @@
+$FreeBSD$
+
+--- ../../j2se/src/solaris/bin/java_md.c	15 Feb 2005 02:06:26 -0000	1.6
++++ ../../j2se/src/solaris/bin/java_md.c	20 Apr 2005 12:08:02 -0000
+@@ -906,8 +904,7 @@
+     if (execname != NULL)	/* Already determined */
+ 	return (execname);
+ 
+-/* XXXBSD:  is it right for us ?*/
+-#if defined(__sun) || defined(__FreeBSD__)
++#if defined(__sun)
+     {
+         Dl_info dlinfo;
+         if (dladdr((void*)&SetExecname, &dlinfo)) {
+@@ -928,12 +925,47 @@
+ 	    exec_path = strdup(buf);
+ 	}
+     }
++#elif defined(__FreeBSD__)
++    /* Try /proc/curproc/file if exec_path hasn't been found */
++
++    if (exec_path == NULL) {
++	const char* self = "/proc/curproc/file";
++        char buf[PATH_MAX+1];
++        int len = readlink(self, buf, PATH_MAX);
++        if (len >= 0) {
++	    buf[len] = '\0';		/* readlink doesn't nul terminate */
++	    exec_path = strdup(buf);
++	}
++    }
++
++    /*
++     * Try the dladdr(3) method FreeBSD if exec_path hasn't been found.
++     * Requires a recent version of FreeBSD.
++     */
++
++    /*
++    if (exec_path == NULL) {
++        Dl_info dlinfo;
++        if (dladdr((void*)&SetExecname, &dlinfo)) {
++	    char *resolved = (char*)MemAlloc(PATH_MAX+1);
++	    if (resolved != NULL) {
++		exec_path = realpath(dlinfo.dli_fname, resolved);
++		if (exec_path == NULL) {
++		    free(resolved);
++		}
++	    }
++        }
++    }
++    */
++
+ #else /* !__sun && !__linux */
+     {
+         /* Not implemented */
+     }
+ #endif 
+ 
++    /* Fall back to examining argv[0] and our path */
++
+     if (exec_path == NULL) {
+         exec_path = FindExecName(argv[0]);
+     }