compatibility with Tru64 UNIX: fcntl(F_SETLK, F_WRLCK) returns EINVAL if busy

src/core/ngx_shmtx.h

diff --git a/src/core/ngx_shmtx.h b/src/core/ngx_shmtx.h
index e6fb6aa..57fe0b9 100644
--- a/src/core/ngx_shmtx.h
+++ b/src/core/ngx_shmtx.h
@@ -57,7 +57,15 @@
         return 0;
     }
 
-    ngx_log_abort(err, ngx_trylock_fd_n " failed");
+#if __osf__ /* Tru64 UNIX */
+
+    if (err == NGX_EACCESS) {
+        return 0;
+    }
+
+#endif
+
+    ngx_log_abort(err, ngx_trylock_fd_n " %s failed", mtx->name);
 
     return 0;
 }
@@ -74,7 +82,7 @@
         return;
     }
 
-    ngx_log_abort(err, ngx_lock_fd_n " failed");
+    ngx_log_abort(err, ngx_lock_fd_n " %s failed", mtx->name);
 }
 
 
@@ -89,7 +97,7 @@
         return;
     }
 
-    ngx_log_abort(err, ngx_unlock_fd_n " failed");
+    ngx_log_abort(err, ngx_unlock_fd_n " %s failed", mtx->name);
 }