Add security_get_checkreqprot() function, returning the current active
checkreqprot value
---
libselinux/include/selinux/selinux.h | 3 +++
libselinux/man/man3/security_getenforce.3 | 11 ++++++++-
libselinux/src/checkreqprot.c | 40 +++++++++++++++++++++++++++++++
libselinux/src/selinux_internal.h | 1 +
4 files changed, 54 insertions(+), 1 deletion(-)
create mode 100644 libselinux/src/checkreqprot.c
diff --git a/libselinux/include/selinux/selinux.h b/libselinux/include/selinux/selinux.h
index 45dd6ca5..01201eee 100644
--- a/libselinux/include/selinux/selinux.h
+++ b/libselinux/include/selinux/selinux.h
@@ -331,6 +331,9 @@ extern int security_setenforce(int value);
/* Get the behavior for undefined classes/permissions */
extern int security_deny_unknown(void);
+/* Get the checkreqprot value */
+extern int security_get_checkreqprot(void);
+
/* Disable SELinux at runtime (must be done prior to initial policy load). */
extern int security_disable(void);
diff --git a/libselinux/man/man3/security_getenforce.3 b/libselinux/man/man3/security_getenforce.3
index 7658014a..29cf3de7 100644
--- a/libselinux/man/man3/security_getenforce.3
+++ b/libselinux/man/man3/security_getenforce.3
@@ -1,6 +1,6 @@
.TH "security_getenforce" "3" "1 January 2004" "russell@xxxxxxxxxxxx" "SELinux API documentation"
.SH "NAME"
-security_getenforce, security_setenforce, security_deny_unknown \- get or set the enforcing state of SELinux
+security_getenforce, security_setenforce, security_deny_unknown, security_get_checkreqprot\- get or set the enforcing state of SELinux
.
.SH "SYNOPSIS"
.B #include <selinux/selinux.h>
@@ -10,6 +10,8 @@ security_getenforce, security_setenforce, security_deny_unknown \- get or set th
.BI "int security_setenforce(int "value );
.sp
.B int security_deny_unknown(void);
+.sp
+.B int security_get_checkreqprot(void);
.
.SH "DESCRIPTION"
.BR security_getenforce ()
@@ -24,6 +26,13 @@ returned.
.BR security_deny_unknown ()
returns 0 if SELinux treats policy queries on undefined object classes or
permissions as being allowed, 1 if such queries are denied, and \-1 on error.
+
+.BR security_get_checkreqprot ()
+can be used to determine whether SELinux is configured to check the
+protection requested by the application or the actual protection that will
+be applied by the kernel (including the effects of READ_IMPLIES_EXEC) on
+mmap and mprotect calls. It returns 0 if SELinux checks the actual
+protection, 1 if it checks the requested protection, and \-1 on error.
.
.SH "SEE ALSO"
.BR selinux "(8)"
diff --git a/libselinux/src/checkreqprot.c b/libselinux/src/checkreqprot.c
new file mode 100644
index 00000000..9b4b12d7
--- /dev/null
+++ b/libselinux/src/checkreqprot.c
@@ -0,0 +1,40 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include "selinux_internal.h"
+#include "policy.h"
+#include <stdio.h>
+#include <limits.h>
+
+int security_get_checkreqprot(void)
+{
+ int fd, ret, checkreqprot = 0;
+ char path[PATH_MAX];
+ char buf[20];
+
+ if (!selinux_mnt) {
+ errno = ENOENT;
+ return -1;
+ }
+
+ snprintf(path, sizeof(path), "%s/checkreqprot", selinux_mnt);
+ fd = open(path, O_RDONLY | O_CLOEXEC);
+ if (fd < 0)
+ return -1;
+
+ memset(buf, 0, sizeof(buf));
+ ret = read(fd, buf, sizeof(buf) - 1);
+ close(fd);
+ if (ret < 0)
+ return -1;
+
+ if (sscanf(buf, "%d", &checkreqprot) != 1)
+ return -1;
+
+ return checkreqprot;
+}
+
+hidden_def(security_get_checkreqprot);
diff --git a/libselinux/src/selinux_internal.h b/libselinux/src/selinux_internal.h
index 3d5c9fb4..54949c13 100644
--- a/libselinux/src/selinux_internal.h
+++ b/libselinux/src/selinux_internal.h
@@ -59,6 +59,7 @@ hidden_proto(selinux_mkload_policy)
hidden_proto(security_getenforce)
hidden_proto(security_setenforce)
hidden_proto(security_deny_unknown)
+ hidden_proto(security_get_checkreqprot)
hidden_proto(selinux_boolean_sub)
hidden_proto(selinux_current_policy_path)
hidden_proto(selinux_binary_policy_path)
--
2.11.0
