--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simple_selinux/Current_prop.thy	Mon Dec 02 10:52:40 2013 +0800
@@ -0,0 +1,105 @@
+(*<*)
+theory Current_prop
+imports Main Flask_type Flask My_list_prefix Init_prop Valid_prop Delete_prop
+begin
+(*>*)
+
+context flask begin
+
+lemma procs_of_shm_prop1: "\<lbrakk> p_flag \<in> procs_of_shm s h; valid s\<rbrakk> \<Longrightarrow> h \<in> current_shms s"
+apply (induct s arbitrary:p_flag)
+apply (case_tac p_flag, simp, drule init_procs_has_shm, simp)
+apply (frule vd_cons, frule vt_grant_os)
+apply (case_tac a, auto split:if_splits option.splits)
+done
+
+lemma procs_of_shm_prop2: "\<lbrakk>(p, flag) \<in> procs_of_shm s h; valid s\<rbrakk> \<Longrightarrow> p \<in> current_procs s"
+apply (induct s arbitrary:p flag)
+apply (simp, drule init_procs_has_shm, simp)
+apply (frule vd_cons, frule vt_grant_os)
+apply (case_tac a, auto split:if_splits option.splits)
+done
+
+lemma procs_of_shm_prop2':
+  "\<lbrakk>p \<notin> current_procs s; valid s\<rbrakk> \<Longrightarrow> \<forall> flag h. (p, flag) \<notin> procs_of_shm s h"
+by (auto dest:procs_of_shm_prop2)
+
+lemma procs_of_shm_prop3: "\<lbrakk>(p, flag) \<in> procs_of_shm s h; (p, flag') \<in> procs_of_shm s h; valid s\<rbrakk>
+  \<Longrightarrow> flag = flag'"
+apply (induct s arbitrary:p flag flag')
+apply (simp, drule_tac flag = flag in init_procs_has_shm, drule_tac flag = flag' in init_procs_has_shm, simp)
+apply (frule vd_cons, frule vt_grant_os)
+apply (case_tac a, auto split:if_splits option.splits dest:procs_of_shm_prop2)
+done
+
+lemma procs_of_shm_prop4: "\<lbrakk>(p, flag) \<in> procs_of_shm s h; valid s\<rbrakk> \<Longrightarrow> flag_of_proc_shm s p h = Some flag"
+apply (induct s arbitrary:p flag)
+apply (simp, drule init_procs_has_shm, simp)
+apply (frule vd_cons, frule vt_grant_os)
+apply (case_tac a, auto split:if_splits option.splits dest:procs_of_shm_prop2)
+done
+
+lemma procs_of_shm_prop4':
+  "\<lbrakk>flag_of_proc_shm s p h = None; valid s\<rbrakk> \<Longrightarrow> \<forall> flag. (p, flag) \<notin> procs_of_shm s h"
+by (auto dest:procs_of_shm_prop4)
+
+lemma not_init_intro_proc:
+  "\<lbrakk>p \<notin> current_procs s; valid s\<rbrakk> \<Longrightarrow> deleted (O_proc p) s \<or> p \<notin> init_procs"
+using not_deleted_init_proc by auto
+
+lemma not_init_intro_proc':
+  "\<lbrakk>p \<notin> current_procs s; valid s\<rbrakk> \<Longrightarrow> \<not> (\<not> deleted (O_proc p) s \<and> p \<in> init_procs)"
+using not_deleted_init_proc by auto
+
+lemma info_shm_flow_in_procs:
+  "\<lbrakk>info_flow_shm s p p'; valid s\<rbrakk> \<Longrightarrow> p \<in> current_procs s \<and> p' \<in> current_procs s"
+by (auto intro:procs_of_shm_prop2 simp:info_flow_shm_def one_flow_shm_def)
+
+lemma flag_of_proc_shm_prop1:
+  "\<lbrakk>flag_of_proc_shm s p h = Some flag; valid s\<rbrakk> \<Longrightarrow> (p, flag) \<in> procs_of_shm s h"
+apply (induct s arbitrary:p flag)
+apply (simp, drule init_shmflag_has_proc, simp)
+apply (frule vd_cons, frule vt_grant_os)
+apply (case_tac a, auto split:if_splits option.splits dest:procs_of_shm_prop2)
+done
+
+
+
+lemma has_same_inode_in_current:
+  "\<lbrakk>has_same_inode s f f'; valid s\<rbrakk> \<Longrightarrow> f \<in> current_files s \<and> f' \<in> current_files s"
+by (auto simp add:has_same_inode_def current_files_def same_inode_files_def 
+  is_file_def split:if_splits option.splits)
+
+
+lemma has_same_inode_prop1:
+  "\<lbrakk>has_same_inode s f f'; is_file s f; valid s\<rbrakk> \<Longrightarrow> is_file s f'"
+by (auto simp:has_same_inode_def same_inode_files_def is_file_def)
+
+lemma has_same_inode_prop1':
+  "\<lbrakk>has_same_inode s f f'; is_file s f'; valid s\<rbrakk> \<Longrightarrow> is_file s f"
+by (auto simp:has_same_inode_def is_file_def same_inode_files_def 
+ split:if_splits option.splits)
+
+lemma has_same_inode_prop2:
+  "\<lbrakk>has_same_inode s f f'; file_of_proc_fd s p fd = Some f; valid s\<rbrakk> \<Longrightarrow> is_file s f'"
+apply (drule has_same_inode_prop1)
+apply (simp add:file_of_pfd_is_file, simp+)
+done
+
+lemma has_same_inode_prop2':
+  "\<lbrakk>has_same_inode s f f'; file_of_proc_fd s p fd = Some f'; valid s\<rbrakk> \<Longrightarrow> is_file s f"
+apply (drule has_same_inode_prop1')
+apply (simp add:file_of_pfd_is_file, simp+)
+done
+
+lemma tobj_in_init_alive:
+  "tobj_in_init obj \<Longrightarrow> init_alive obj"
+by (case_tac obj, auto)
+
+lemma tobj_in_alive:
+  "tobj_in_init obj \<Longrightarrow> alive [] obj"
+by (case_tac obj, auto simp:is_file_nil)
+
+end
+
+end
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