From 94d164dd7f20c785a543d1fb1d5bd359fb38bd25 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 4 May 2017 20:06:40 +0200
Subject: Add a setup hook for detecting $TMPDIR references in RPATHs and
 wrapper scripts

---
 pkgs/stdenv/generic/setup.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'pkgs/stdenv/generic/setup.sh')

diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh
index de33ab565982..eb63b18e5f3d 100644
--- a/pkgs/stdenv/generic/setup.sh
+++ b/pkgs/stdenv/generic/setup.sh
@@ -199,6 +199,18 @@ isELF() {
     if [[ "$magic" =~ ELF ]]; then return 0; else return 1; fi
 }
 
+# Return success if the specified file is a script (i.e. starts with
+# "#!").
+isScript() {
+    local fn="$1"
+    local magic
+    if ! [ -x /bin/sh ]; then return 0; fi
+    exec {fd}< "$fn"
+    read -n 2 -u $fd magic
+    exec {fd}<&-
+    if [[ "$magic" =~ \#! ]]; then return 0; else return 1; fi
+}
+
 
 ######################################################################
 # Initialisation.
-- 
cgit 1.4.1