Add a hackish attempt at a workaround for #961235

Add a patch to create /run/user/0 if we're trying to resolve a
DIR: ccache somewhere below it and neither the target location
nor /run/user/0 exist yet.
The better workaround is to set the location's owner to "linger"
via logind, since even after we do what we're doing here, if
the user logs in and logs back out, our location is still removed.

krb5-1.11-run_user_0.patch

@@ -0,0 +1,34 @@
+A hack: if we're looking at creating a ccache directory directly below
+the /run/user/0 directory, and /run/user/0 doesn't exist, try to create
+it, too.
+
+--- krb5/src/lib/krb5/ccache/cc_dir.c
++++ krb5/src/lib/krb5/ccache/cc_dir.c
+@@ -61,6 +61,8 @@
+ 
+ #include <dirent.h>
+ 
++#define ROOT_SPECIAL_DCC_PARENT "/run/user/0"
++
+ extern const krb5_cc_ops krb5_dcc_ops;
+ extern const krb5_cc_ops krb5_fcc_ops;
+ 
+@@ -239,6 +241,18 @@
+ 
+     if (stat(dirname, &st) < 0) {
+         if (errno == ENOENT) {
++            if (strncmp(dirname, ROOT_SPECIAL_DCC_PARENT "/",
++                        sizeof(ROOT_SPECIAL_DCC_PARENT)) == 0 &&
++                stat(ROOT_SPECIAL_DCC_PARENT, &st) < 0 &&
++                errno == ENOENT) {
++#ifdef USE_SELINUX
++                selabel = krb5int_push_fscreatecon_for(ROOT_SPECIAL_DCC_PARENT);
++#endif
++                status = mkdir(ROOT_SPECIAL_DCC_PARENT, S_IRWXU);
++#ifdef USE_SELINUX
++                krb5int_pop_fscreatecon(selabel);
++#endif
++            }
+ #ifdef USE_SELINUX
+             selabel = krb5int_push_fscreatecon_for(dirname);
+ #endif

krb5.spec

@@ -85,6 +85,7 @@ Patch125: krb5-1.11.2-skew1.patch
 Patch126: krb5-1.11.2-skew2.patch
 Patch127: krb5-master-test_gss_no_udp.patch
 Patch128: krb5-master-test_no_pmap.patch 
+Patch129: krb5-1.11-run_user_0.patch
 
 # Patches for otp plugin backport
 Patch201: krb5-1.11.2-keycheck.patch
@@ -312,6 +313,7 @@ ln -s NOTICE LICENSE
 %patch126 -p1 -b .skew2
 %patch127 -p1 -b .test_gss_no_udp
 %patch128 -p1 -b .test_no_pmap
+%patch129 -p1 -b .run_user_0
 
 %patch201 -p1 -b .keycheck
 %patch202 -p1 -b .otp
@@ -840,6 +842,10 @@ exit 0
 * Thu May 30 2013 Nalin Dahyabhai <nalin@redhat.com> 1.11.2-9
 - don't forget to set the SELinux label when creating the directory for
   a DIR: ccache
+- special-case /run/user/0, attempting to create it when resolving a
+  directory cache below it fails due to ENOENT and we find that it doesn't
+  already exist, either, before attempting to create the directory cache
+  (maybe helping, maybe just making things more confusing for #961235)
 
 * Thu May 30 2013 Nalin Dahyabhai <nalin@redhat.com> 1.11.2-8
 - pull in patches from master to not test GSSRPC-over-UDP and to not