Date: Fri, 24 Apr 2015 18:06:16 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 187114] rtld(1) does not expand $ORIGIN unless DF_ORIGIN flag is set Message-ID: <bug-187114-8-Vd1IzGqC9y@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-187114-8@https.bugs.freebsd.org/bugzilla/> References: <bug-187114-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187114 --- Comment #1 from Ed Maste <emaste@freebsd.org> --- When the dynamic linker loads an object that uses $ORIGIN, it must calculate the pathname of the directory containing the object. Because this calculation can be computationally expensive, implementations may want to avoid the calculation for objects that do not use $ORIGIN. If an object calls dlopen() with a string containing $ORIGIN and does not use $ORIGIN in one if its dynamic array entries, the dynamic linker may not have calculated the pathname for the object until the dlopen() actually occurs. Since the application may have changed its current working directory before the dlopen() call, the calculation may not yield the correct result. To avoid this possibility, an object may signal its intention to reference $ORIGIN by setting the DF_ORIGIN flag. An implementation may reject an attempt to use $ORIGIN within a dlopen() call from an object that did not set the DF_ORIGIN flag and did not use $ORIGIN within its dynamic array. -- You are receiving this mail because: You are the assignee for the bug.
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