at/at-3.1.12-selinux.patch

diff -up at-3.1.12/config.h.in.selinux at-3.1.12/config.h.in
--- at-3.1.12/config.h.in.selinux	2009-12-02 16:32:19.469228959 +0100
+++ at-3.1.12/config.h.in	2009-12-02 16:32:57.706966488 +0100
@@ -71,6 +71,9 @@
 /* Define if you are building with_pam */
 #undef WITH_PAM
 
+/* Define if you are building with_selinux  */
+#undef WITH_SELINUX
+
 /* Define to 1 if you have the `pstat_getdynamic' function. */
 #undef HAVE_PSTAT_GETDYNAMIC
 
diff -up at-3.1.12/configure.ac.selinux at-3.1.12/configure.ac
--- at-3.1.12/configure.ac.selinux	2009-12-02 16:31:15.323246019 +0100
+++ at-3.1.12/configure.ac	2009-12-02 16:32:01.425966844 +0100
@@ -266,5 +266,13 @@ AC_ARG_WITH(daemon_groupname,
 )
 AC_SUBST(DAEMON_GROUPNAME)
 
+AC_ARG_WITH(selinux,
+[ --with-selinux       Define to run with selinux],
+AC_DEFINE(WITH_SELINUX),
+)
+AC_CHECK_LIB(selinux, is_selinux_enabled, SELINUXLIB=-lselinux)
+AC_SUBST(SELINUXLIB)
+AC_SUBST(WITH_SELINUX)
+
 AC_CONFIG_FILES(Makefile atrun atd.8 atrun.8 at.1 batch)
 AC_OUTPUT
diff -up at-3.1.12/Makefile.in.selinux at-3.1.12/Makefile.in
--- at-3.1.12/Makefile.in.selinux	2009-12-02 16:30:11.923216529 +0100
+++ at-3.1.12/Makefile.in	2009-12-02 16:30:57.949215706 +0100
@@ -39,6 +39,7 @@ LIBS		= @LIBS@
 LIBOBJS		= @LIBOBJS@
 INSTALL		= @INSTALL@
 PAMLIB          = @PAMLIB@
+SELINUXLIB      = @SELINUXLIB@
 
 CLONES		= atq atrm 
 ATOBJECTS	= at.o panic.o perm.o posixtm.o y.tab.o lex.yy.o
diff -up at-3.1.12/atd.c.selinux at-3.1.12/atd.c
--- at-3.1.12/atd.c.selinux	2009-12-03 13:03:57.182284669 +0100
+++ at-3.1.12/atd.c	2009-12-03 13:07:20.542272874 +0100
@@ -83,6 +83,14 @@
 #include "getloadavg.h"
 #endif
 
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#include <selinux/get_context_list.h>
+int selinux_enabled=0;
+#include <selinux/flask.h>
+#include <selinux/av_permissions.h>
+#endif
+
 #ifndef LOG_ATD
 #define LOG_ATD        LOG_DAEMON
 #endif
@@ -202,6 +210,68 @@ myfork()
 #define ATD_MAIL_NAME    "mailx"
 #endif
 
+#ifdef WITH_SELINUX
+static int set_selinux_context(const char *name, const char *filename) {
+       security_context_t user_context=NULL;
+       security_context_t  file_context=NULL;
+       struct av_decision avd;
+       int retval=-1;
+       char *seuser=NULL;
+       char *level=NULL;
+
+       if (getseuserbyname(name, &seuser, &level) == 0) {
+               retval=get_default_context_with_level(seuser, level, NULL, &user_context);
+               free(seuser);
+               free(level);
+               if (retval) {
+                       if (security_getenforce()==1) {
+                               perr("execle: couldn't get security context for user %s\n", name);
+                       } else {
+                               syslog(LOG_ERR, "execle: couldn't get security context for user %s\n", name);
+                               return -1;
+                       }
+               }
+       }
+
+       /*
+       * Since crontab files are not directly executed,
+       * crond must ensure that the crontab file has
+       * a context that is appropriate for the context of
+       * the user cron job.  It performs an entrypoint
+       * permission check for this purpose.
+       */
+       if (fgetfilecon(STDIN_FILENO, &file_context) < 0)
+               perr("fgetfilecon FAILED %s", filename);
+
+       retval = security_compute_av(user_context,
+                                    file_context,
+                                    SECCLASS_FILE,
+                                    FILE__ENTRYPOINT,
+                                    &avd);
+       freecon(file_context);
+       if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
+               if (security_getenforce()==1) {
+                       perr("Not allowed to set exec context to %s for user  %s\n", user_context,name);
+               } else {
+                       syslog(LOG_ERR, "Not allowed to set exec context to %s for user  %s\n", user_context,name);
+                       retval = -1;
+                       goto err;
+               }
+       }
+       if (setexeccon(user_context) < 0) {
+               if (security_getenforce()==1) {
+                       perr("Could not set exec context to %s for user  %s\n", user_context,name);
+                       retval = -1;
+               } else {
+                       syslog(LOG_ERR, "Could not set exec context to %s for user  %s\n", user_context,name);
+               }
+       }
+  err:
+       freecon(user_context);
+       return 0;
+}
+#endif
+
 static void
 run_file(const char *filename, uid_t uid, gid_t gid)
 {
@@ -452,6 +522,12 @@ run_file(const char *filename, uid_t uid
                 perr("Cannot reset signal handler to default");
 
 	    chdir("/");
+#ifdef WITH_SELINUX
+            if (selinux_enabled > 0) {
+                if (set_selinux_context(pentry->pw_name, filename) < 0)
+                       perr("SELinux Failed to set context\n");
+            }
+#endif
 
 	    if (execle("/bin/sh", "sh", (char *) NULL, nenvp) != 0)
 		perr("Exec failed for /bin/sh");
@@ -774,6 +850,10 @@ main(int argc, char *argv[])
     struct passwd *pwe;
     struct group *ge;
 
+#ifdef WITH_SELINUX
+    selinux_enabled=is_selinux_enabled();
+#endif
+
 /* We don't need root privileges all the time; running under uid and gid
  * daemon is fine.
  */