ports/137940: bsd java does not start from nullfs mount when procfs is available

[Jonathan Chen]

>Number:         137940
>Category:       ports
>Synopsis:       bsd java does not start from nullfs mount when procfs is available
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 18 20:40:02 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Jonathan Chen
>Release:        FreeBSD 7.2-STABLE i386
>Organization:
>Environment:


>Description:
	When procfs is available, java cannot be started from under nullfs mounts.
	This is due to /proc/currproc/file returning a symlink to "unknown" instead of the java executable.
	This can break java in chroot environments setup with nullfs.
	Problem occurs with jdk15 and jdk16
>How-To-Repeat:
	mount /proc ; mount -t nullfs /usr/local/java /mnt ; /mnt/bin/java
>Fix:
	The following patch allows java to fall back to non-procfs means of finding itself if procfs does not return an absolute path.

--- ../../j2se/src/solaris/bin/java_md.c~	2009-08-18 15:43:01.000000000 -0400
+++ ../../j2se/src/solaris/bin/java_md.c	2009-08-18 15:43:44.000000000 -0400
@@ -905,7 +905,7 @@
 	const char* self = "/proc/curproc/file";
         char buf[PATH_MAX+1];
         int len = readlink(self, buf, PATH_MAX);
-        if (len >= 0) {
+        if (len >= 0 && buf[0] == '/') {
 	    buf[len] = '\0';		/* readlink doesn't nul terminate */
 	    exec_path = strdup(buf);
 	}
--- ../../deploy/src/javaws/solaris/native/system_md.c~	2009-08-18 15:42:54.000000000 -0400
+++ ../../deploy/src/javaws/solaris/native/system_md.c	2009-08-18 15:43:39.000000000 -0400
@@ -408,7 +408,7 @@
         const char* self = "/proc/curproc/file";
         char buf[PATH_MAX+1];
         int len = readlink(self, buf, PATH_MAX);
-        if (len >= 0) {
+        if (len >= 0 && buf[0] == '/') {
             buf[len] = '\0';            /* readlink doesn't nul terminate */
             exec_path = strdup(buf);
         }


>Release-Note:
>Audit-Trail:
>Unformatted: