diff -up util-linux-2.23.2/sys-utils/Makemodule.am.kzak util-linux-2.23.2/sys-utils/Makemodule.am
--- util-linux-2.23.2/sys-utils/Makemodule.am.kzak 2015-06-26 10:21:34.337221288 +0200
+++ util-linux-2.23.2/sys-utils/Makemodule.am 2015-06-26 10:22:18.719885983 +0200
@@ -308,7 +308,7 @@ if BUILD_NSENTER
usrbin_exec_PROGRAMS += nsenter
dist_man_MANS += sys-utils/nsenter.1
nsenter_SOURCES = sys-utils/nsenter.c
-nsenter_LDADD = $(LDADD) libcommon.la
+nsenter_LDADD = $(LDADD) libcommon.la $(SELINUX_LIBS)
endif
if BUILD_HWCLOCK
diff -up util-linux-2.23.2/sys-utils/nsenter.1.kzak util-linux-2.23.2/sys-utils/nsenter.1
--- util-linux-2.23.2/sys-utils/nsenter.1.kzak 2015-06-26 10:14:00.947646586 +0200
+++ util-linux-2.23.2/sys-utils/nsenter.1 2015-06-26 10:21:34.337221288 +0200
@@ -155,6 +155,11 @@ Do not fork before exec'ing the specifie
PID namespace, \fBnsenter\fP calls \fBfork\fP before calling \fBexec\fP so that
any children will also be in the newly entered PID namespace.
.TP
+\fB\-Z\fR, \fB\-\-follow\-context\fR
+Set the SELinux security context used for executing a new process according to
+already running process specified by \fB\-\-target\fR PID. (The util-linux has
+to be compiled with SELinux support otherwise the option is unavailable.)
+.TP
\fB\-V\fR, \fB\-\-version\fR
Display version information and exit.
.TP
@@ -163,10 +168,14 @@ Display help text and exit.
.SH SEE ALSO
.BR setns (2),
.BR clone (2)
-.SH AUTHOR
-.MT ebiederm@xmission.com
+.SH AUTHORS
+.UR biederm@xmission.com
Eric Biederman
-.ME
+.UE
+.br
+.UR kzak@redhat.com
+Karel Zak
+.UE
.SH AVAILABILITY
The nsenter command is part of the util-linux package and is available from
.UR ftp://\:ftp.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
diff -up util-linux-2.23.2/sys-utils/nsenter.c.kzak util-linux-2.23.2/sys-utils/nsenter.c
--- util-linux-2.23.2/sys-utils/nsenter.c.kzak 2015-06-26 10:14:00.947646586 +0200
+++ util-linux-2.23.2/sys-utils/nsenter.c 2015-06-26 10:21:34.337221288 +0200
@@ -30,6 +30,10 @@
#include <sys/wait.h>
#include <grp.h>
+#ifdef HAVE_LIBSELINUX
+# include <selinux/selinux.h>
+#endif
+
#include "strutils.h"
#include "nls.h"
#include "c.h"
@@ -82,6 +86,9 @@ static void usage(int status)
fputs(_(" -r, --root[=<dir>] set the root directory\n"), out);
fputs(_(" -w, --wd[=<dir>] set the working directory\n"), out);
fputs(_(" -F, --no-fork do not fork before exec'ing <program>\n"), out);
+#ifdef HAVE_LIBSELINUX
+ fputs(_(" -Z, --follow-context set SELinux context according to --target PID\n"), out);
+#endif
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
@@ -185,6 +192,9 @@ int main(int argc, char *argv[])
{ "wd", optional_argument, NULL, 'w' },
{ "no-fork", no_argument, NULL, 'F' },
{ "preserve-credentials", no_argument, NULL, OPT_PRESERVE_CRED },
+#ifdef HAVE_LIBSELINUX
+ { "follow-context", no_argument, NULL, 'Z' },
+#endif
{ NULL, 0, NULL, 0 }
};
@@ -194,6 +204,9 @@ int main(int argc, char *argv[])
int do_fork = -1; /* unknown yet */
uid_t uid = 0;
gid_t gid = 0;
+#ifdef HAVE_LIBSELINUX
+ bool selinux = 0;
+#endif
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
@@ -201,7 +214,7 @@ int main(int argc, char *argv[])
atexit(close_stdout);
while ((c =
- getopt_long(argc, argv, "+hVt:m::u::i::n::p::U::S:G:r::w::F",
+ getopt_long(argc, argv, "+hVt:m::u::i::n::p::U::S:G:r::w::FZ",
longopts, NULL)) != -1) {
switch (c) {
case 'h':
@@ -275,11 +288,30 @@ int main(int argc, char *argv[])
case OPT_PRESERVE_CRED:
preserve_cred = 1;
break;
+#ifdef HAVE_LIBSELINUX
+ case 'Z':
+ selinux = 1;
+ break;
+#endif
default:
usage(EXIT_FAILURE);
}
}
+#ifdef HAVE_LIBSELINUX
+ if (selinux && is_selinux_enabled() > 0) {
+ char *scon = NULL;
+
+ if (!namespace_target_pid)
+ errx(EXIT_FAILURE, _("no target PID specified for --follow-context"));
+ if (getpidcon(namespace_target_pid, &scon) < 0)
+ errx(EXIT_FAILURE, _("failed to get %d SELinux context"),
+ (int) namespace_target_pid);
+ if (setexeccon(scon) < 0)
+ errx(EXIT_FAILURE, _("failed to set exec context to '%s'"), scon);
+ freecon(scon);
+ }
+#endif
/*
* Open remaining namespace and directory descriptors.
*/