From a681fe258de2cdb710a79dcd4fb52ad08426e34a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Wed, 12 Jul 2017 20:52:51 -0400
Subject: [PATCH] unix: OS-specific paths should also chop filename off base
 path.

---
 src/platform_unix.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/platform_unix.c b/src/platform_unix.c
index aa76a0f..80fd7a5 100644
--- a/src/platform_unix.c
+++ b/src/platform_unix.c
@@ -271,14 +271,11 @@ char *__PHYSFS_platformCalcBaseDir(const char *argv0)
     }
     #endif
 
-    if (retval)
-        return retval;   /* already got it. */
-
     /* If there's a Linux-like /proc filesystem, you can get the full path to
      *  the current process from a symlink in there.
      */
 
-    if (access("/proc", F_OK) == 0)
+    if (!retval && (access("/proc", F_OK) == 0))
     {
         retval = readSymLink("/proc/self/exe");
         if (!retval) retval = readSymLink("/proc/curproc/file");