diff -urN cups-1.1.7.old/conf/cupsd.conf cups-1.1.7/conf/cupsd.conf
--- cups-1.1.7.old/conf/cupsd.conf	Fri May 18 16:07:37 2001
+++ cups-1.1.7/conf/cupsd.conf.in	Fri May 18 16:50:40 2001
@@ -257,6 +257,9 @@
 # default IPP port of 631.  It changes users whenever an external
 # program is run...
 #
+# If you want to set a user different than 'lp', make sure you
+# also set the TempDir configuration variable to a user-writable
+# directory !!
 
 #User lp
 #Group sys
diff -urN cups-1.1.7.old/cups/tempfile.c cups-1.1.7/cups/tempfile.c
--- cups-1.1.7.old/cups/tempfile.c	Fri May 18 16:07:37 2001
+++ cups-1.1.7/cups/tempfile.c	Fri May 18 16:51:07 2001
@@ -82,6 +82,7 @@
 #ifdef WIN32
   GetTempPath(sizeof(tmpdir), tmpdir);
 #else
+  unsetenv("TMPDIR");
   if ((tmpdir = getenv("TMPDIR")) == NULL)
   {
    /*
diff -urN cups-1.1.7.old/pdftops/gfile.cxx cups-1.1.7/pdftops/gfile.cxx
--- cups-1.1.7.old/pdftops/gfile.cxx	Fri May 18 16:07:39 2001
+++ cups-1.1.7/pdftops/gfile.cxx	Fri May 18 16:51:20 2001
@@ -504,6 +504,7 @@
     fd = open((*name)->getCString(), O_WRONLY | O_CREAT | O_EXCL, 0600);
   } else {
 #  if HAVE_MKSTEMP
+    unsetenv("TMPDIR");
     if ((s = getenv("TMPDIR"))) {
       *name = new GString(s);
     } else {
diff -urN cups-1.1.7.old/scheduler/client.c cups-1.1.7/scheduler/client.c
--- cups-1.1.7.old/scheduler/client.c	Fri May 18 16:07:38 2001
+++ cups-1.1.7/scheduler/client.c	Fri May 18 16:48:45 2001
@@ -2038,6 +2038,11 @@
       * Running as root, so change to non-priviledged user...
       */
 
+	// in modern systems, TMPDIR and TMP equal $HOME/tmp,
+        // and /root/tmp is of no use for non-root processes
+	unsetenv("TMPDIR");
+	unsetenv("TMP");
+
       if (setgid(Group))
         exit(errno);
 
diff -urN cups-1.1.7.old/scheduler/conf.c cups-1.1.7/scheduler/conf.c
--- cups-1.1.7.old/scheduler/conf.c	Fri May 18 16:07:38 2001
+++ cups-1.1.7/scheduler/conf.c	Fri May 18 16:49:08 2001
@@ -232,6 +232,7 @@
 
   strcpy(RIPCache, "8m");
 
+  unsetenv("TMPDIR");
   if (getenv("TMPDIR") == NULL)
     strcpy(TempDir, CUPS_REQUESTS "/tmp");
   else
diff -urN cups-1.1.7.old/scheduler/dirsvc.c cups-1.1.7/scheduler/dirsvc.c
--- cups-1.1.7.old/scheduler/dirsvc.c	Fri May 18 16:07:38 2001
+++ cups-1.1.7/scheduler/dirsvc.c	Fri May 18 16:48:45 2001
@@ -899,6 +899,11 @@
 	* Running as root, so change to non-priviledged user...
 	*/
 
+	// in modern systems, TMPDIR and TMP equal $HOME/tmp,
+        // and /root/tmp is of no use for non-root processes
+	unsetenv("TMPDIR");
+	unsetenv("TMP");
+
 	if (setgid(Group))
           exit(errno);
 
diff -urN cups-1.1.7.old/scheduler/job.c cups-1.1.7/scheduler/job.c
--- cups-1.1.7.old/scheduler/job.c	Fri May 18 16:07:38 2001
+++ cups-1.1.7/scheduler/job.c	Fri May 18 16:48:45 2001
@@ -2816,6 +2816,11 @@
       * Running as root, so change to non-priviledged user...
       */
 
+	// in modern systems, TMPDIR and TMP equal $HOME/tmp,
+        // and /root/tmp is of no use for non-root processes
+	unsetenv("TMPDIR");
+	unsetenv("TMP");
+
       if (setgid(Group))
         exit(errno);
 
diff -urN cups-1.1.7.old/scheduler/server.c cups-1.1.7/scheduler/server.c
--- cups-1.1.7.old/scheduler/server.c	Fri May 18 16:07:38 2001
+++ cups-1.1.7/scheduler/server.c	Fri May 18 16:48:45 2001
@@ -92,6 +92,11 @@
 
   if (RunAsUser)
   {
+	// in modern systems, TMPDIR and TMP equal $HOME/tmp,
+        // and /root/tmp is of no use for non-root processes
+	unsetenv("TMPDIR");
+	unsetenv("TMP");
+
     setgid(Group);
     setgroups(0, NULL);
     setuid(User);