https://svn.apache.org/viewvc?view=revision&revision=1561395

--- apr-1.4.8/shmem/unix/shm.c.r1561395

+++ apr-1.4.8/shmem/unix/shm.c

@@ -20,6 +20,18 @@

 #include "apr_errno.h"

 #include "apr_user.h"

 #include "apr_strings.h"

+#include "apr_hash.h"

+

+#if APR_USE_SHMEM_SHMGET

+static key_t our_ftok(const char *filename)

+{

+    /* to help avoid collisions while still using

+     * an easily recreated proj_id */

+    apr_ssize_t slen = strlen(filename);

+    return ftok(filename,

+                (int)apr_hashfunc_default(filename, &slen));

+}

+#endif

 static apr_status_t shm_cleanup_owner(void *m_)

 {

@@ -312,7 +324,7 @@

         /* ftok() (on solaris at least) requires that the file actually

          * exist before calling ftok(). */

-        shmkey = ftok(filename, 1);

+        shmkey = our_ftok(filename);

         if (shmkey == (key_t)-1) {

             return errno;

         }

@@ -386,7 +398,7 @@

     /* ftok() (on solaris at least) requires that the file actually

      * exist before calling ftok(). */

-    shmkey = ftok(filename, 1);

+    shmkey = our_ftok(filename);

     if (shmkey == (key_t)-1) {

         goto shm_remove_failed;

     }

@@ -540,7 +552,7 @@

         new_m->filename = apr_pstrdup(pool, filename);

         new_m->pool = pool;

-        shmkey = ftok(filename, 1);

+        shmkey = our_ftok(filename);

         if (shmkey == (key_t)-1) {

             return errno;

         }