diff -up at-3.1.11/atd.c.selinux at-3.1.11/atd.c

--- at-3.1.11/atd.c.selinux	2009-10-05 12:56:24.573344967 +0200

+++ at-3.1.11/atd.c	2009-10-05 13:01:55.991338568 +0200

@@ -74,6 +74,14 @@

 #include <syslog.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

+

 /* Local headers */

 #include "privs.h"

@@ -204,6 +212,68 @@ 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)

 {

@@ -454,6 +524,13 @@ run_file(const char *filename, uid_t uid

 	    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");

 #ifdef  WITH_PAM

@@ -535,10 +612,24 @@ run_file(const char *filename, uid_t uid

 	    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

+

            execl(ATD_MAIL_PROGRAM, ATD_MAIL_NAME, mailname, (char *) NULL);

 	    perr("Exec failed for mail command");

 	    exit(-1);

+#ifdef WITH_SELINUX

+           if (selinux_enabled>0)

+               if (setexeccon(NULL) < 0)

+                   if (security_getenforce()==1)

+                       perr("Could not reset exec context for user %s\n", pentry->pw_name);

+#endif

+

 	PRIV_END

    }

    else if ( mail_pid == -1 ) {

@@ -754,6 +845,10 @@ 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.

  */

diff -up at-3.1.11/config.h.in.selinux at-3.1.11/config.h.in

--- at-3.1.11/config.h.in.selinux	2009-10-05 12:56:24.573344967 +0200

+++ at-3.1.11/config.h.in	2009-10-05 12:56:24.590350404 +0200

@@ -77,6 +77,9 @@

 /* 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-3.1.11/configure.ac.selinux at-3.1.11/configure.ac

--- at-3.1.11/configure.ac.selinux	2009-10-05 12:56:24.574344835 +0200

+++ at-3.1.11/configure.ac	2009-10-05 12:56:24.591350062 +0200

@@ -308,5 +308,13 @@ AC_DEFINE(WITH_PAM),

 AC_CHECK_LIB(pam, pam_start, PAMLIB='-lpam -lpam_misc')

 AC_SUBST(PAMLIB)

+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-3.1.11/Makefile.in.selinux at-3.1.11/Makefile.in

--- at-3.1.11/Makefile.in.selinux	2009-10-05 12:56:24.509607000 +0200

+++ at-3.1.11/Makefile.in	2009-10-05 12:56:24.592345179 +0200

@@ -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