File at-selinux-20040909.patch of Package at

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File at-selinux-20040909.patch of Package at

--- at-3.1.8/configure.in.selinux	2004-04-15 13:57:37.000000000 -0400
+++ at-3.1.8/configure.in	2004-04-15 13:57:37.000000000 -0400
@@ -320,4 +320,12 @@
 )
 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_OUTPUT(Makefile atrun atd.8 atrun.8 at.1 batch)
--- at-3.1.8/atd.c.selinux	2004-04-15 13:57:37.000000000 -0400
+++ at-3.1.8/atd.c	2004-05-05 13:31:31.616622776 -0400
@@ -85,6 +85,14 @@
 #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"
@@ -438,6 +446,47 @@
 
 	    chdir("/");
 
+#ifdef WITH_SELINUX
+	    if (selinux_enabled>0) {
+	      security_context_t user_context=NULL;
+	      security_context_t  file_context=NULL;
+	      int retval=0;
+	      struct av_decision avd;
+
+	      if (get_default_context(pentry->pw_name, NULL, &user_context)) 
+		perr("execle: couldn't get security context for user %s\n", pentry->pw_name); 
+	      /*
+	       * 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,pentry->pw_name); 
+	      }
+
+	      if (setexeccon(user_context) < 0) {
+		if (security_getenforce()==1) {
+		  perr("Could not set exec context to %s for user  %s\n", user_context,pentry->pw_name); 
+		} else {
+		  syslog(LOG_ERR, "Could not set exec context to %s for user  %s\n", user_context,pentry->pw_name); 
+		}
+	      }
+	      freecon(user_context);
+	    }
+#endif	
+
 	    if (execle("/bin/sh", "sh", (char *) NULL, nenvp) != 0)
 		perr("Exec failed for /bin/sh");
 
@@ -454,6 +503,13 @@
      */
     waitpid(pid, (int *) NULL, 0);
 
+#ifdef WITH_SELINUX
+    if (selinux_enabled>0) {
+      if (setexeccon(NULL) < 0) {
+	perr("Could not resset exec context for user %s\n", pentry->pw_name); 
+      }
+    }
+#endif	
     /* Send mail.  Unlink the output file after opening it, so it
      * doesn't hang around after the run (if we are to send mail)
      */
@@ -693,6 +749,9 @@
     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.
  */
--- at-3.1.8/config.h.in.selinux	1997-05-13 08:41:28.000000000 -0400
+++ at-3.1.8/config.h.in	2004-04-15 13:57:37.000000000 -0400
@@ -184,3 +184,6 @@
 #undef DEFAULT_BATCH_QUEUE
 
 #undef HAVE_ATTRIBUTE_NORETURN
+
+/* Define if you are building with_selinux  */
+#undef WITH_SELINUX
--- at-3.1.8/Makefile.in.selinux	2004-04-15 13:57:37.000000000 -0400
+++ at-3.1.8/Makefile.in	2004-04-15 13:57:37.000000000 -0400
@@ -27,6 +27,7 @@
 YACC		= @YACC@
 LEX		= @LEX@
 LEXLIB		= @LEXLIB@
+SELINUXLIB	= @SELINUXLIB@
 
 CC 		= @CC@
 CFLAGS 		= @CFLAGS@
@@ -74,7 +75,7 @@
 	$(LN_S) -f at atrm
 
 atd: $(RUNOBJECTS)
-	$(CC) $(CFLAGS) -o atd $(RUNOBJECTS) $(LIBS)
+	$(CC) $(CFLAGS) -o atd $(RUNOBJECTS) $(LIBS) $(SELINUXLIB)
 
 y.tab.c y.tab.h: parsetime.y
 	$(YACC) -d parsetime.y

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