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From c424bbcb532c5b9924349e3522b3b431eaa7c178 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Fri, 8 Jul 2016 18:59:35 +0200
Subject: [PATCH] install: with -Z, set default SELinux context for created
directories
* doc/coreutils.texi (install invocation): Update -Z documentation.
* src/install.c (make_ancestor): Set default security context before
calling mkdir() if the -Z option is given.
(process_dir): Call restorecon() on the destination directory if the
-Z option is given.
(usage): Update -Z documentation.
* tests/install/install-Z-selinux.sh: A new test for 'install -Z -D'
and 'install -Z -d' based on tests/mkdir/restorecon.sh.
* tests/local.mk: Reference the test.
* NEWS: Mention the improvement.
Reported at https://bugzilla.redhat.com/1339135
Fixes http://bugs.gnu.org/23868
Upstream-commit: 502518b44039138d148e2e15157d125c82d02af0
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
doc/coreutils.texi | 2 +-
src/install.c | 33 ++++++++++++++++++----
tests/install/install-Z-selinux.sh | 58 ++++++++++++++++++++++++++++++++++++++
tests/local.mk | 1 +
4 files changed, 88 insertions(+), 6 deletions(-)
create mode 100644 tests/install/install-Z-selinux.sh
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 092192c..1543f27 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -9208,7 +9208,7 @@ Print the name of each file before moving it.
@cindex security context
This option functions similarly to the @command{restorecon} command,
by adjusting the SELinux security context according
-to the system default type for destination files.
+to the system default type for destination files and each created directory.
@end table
diff --git a/src/install.c b/src/install.c
index 089f298..1b7a209 100644
--- a/src/install.c
+++ b/src/install.c
@@ -39,6 +39,7 @@
#include "prog-fprintf.h"
#include "quote.h"
#include "savewd.h"
+#include "selinux.h"
#include "stat-time.h"
#include "utimens.h"
#include "xstrtol.h"
@@ -423,6 +424,12 @@ announce_mkdir (char const *dir, void *options)
static int
make_ancestor (char const *dir, char const *component, void *options)
{
+ struct cp_options const *x = options;
+ if (x->set_security_context && defaultcon (dir, S_IFDIR) < 0
+ && ! ignorable_ctx_err (errno))
+ error (0, errno, _("failed to set default creation context for %s"),
+ quoteaf (dir));
+
int r = mkdir (component, DEFAULT_MODE);
if (r == 0)
announce_mkdir (dir, options);
@@ -433,12 +440,28 @@ make_ancestor (char const *dir, char const *component, void *options)
static int
process_dir (char *dir, struct savewd *wd, void *options)
{
- return (make_dir_parents (dir, wd,
- make_ancestor, options,
- dir_mode, announce_mkdir,
- dir_mode_bits, owner_id, group_id, false)
+ struct cp_options const *x = options;
+
+ int ret = (make_dir_parents (dir, wd, make_ancestor, options,
+ dir_mode, announce_mkdir,
+ dir_mode_bits, owner_id, group_id, false)
? EXIT_SUCCESS
: EXIT_FAILURE);
+
+ /* FIXME: Due to the current structure of make_dir_parents()
+ we don't have the facility to call defaultcon() before the
+ final component of DIR is created. So for now, create the
+ final component with the context from previous component
+ and here we set the context for the final component. */
+ if (ret == EXIT_SUCCESS && x->set_security_context)
+ {
+ if (! restorecon (last_component (dir), false, false)
+ && ! ignorable_ctx_err (errno))
+ error (0, errno, _("failed to restore context for %s"),
+ quoteaf (dir));
+ }
+
+ return ret;
}
/* Copy file FROM onto file TO, creating TO if necessary.
@@ -651,7 +674,7 @@ In the 4th form, create all components of the given DIRECTORY(ies).\n\
fputs (_("\
-P, --preserve-context preserve SELinux security context (-P deprecated)\n\
-Z set SELinux security context of destination\n\
- file to default type\n\
+ file and each created directory to default type\n\
--context[=CTX] like -Z, or if CTX is specified then set the\n\
SELinux or SMACK security context to CTX\n\
"), stdout);
diff --git a/tests/install/install-Z-selinux.sh b/tests/install/install-Z-selinux.sh
new file mode 100644
index 0000000..9c3b642
--- /dev/null
+++ b/tests/install/install-Z-selinux.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+# test 'install -Z -D' and 'install -Z -d'
+# based on tests/mkdir/restorecon.sh
+
+# Copyright (C) 2013-2016 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ ginstall
+require_selinux_
+
+
+get_selinux_type() { ls -Zd "$1" | sed -n 's/.*:\(.*_t\):.*/\1/p'; }
+
+mkdir subdir || framework_failure_
+chcon 'root:object_r:tmp_t:s0' subdir || framework_failure_
+cd subdir
+
+# Since in a tmp_t dir, dirs can be created as user_tmp_t ...
+touch standard || framework_failure_
+mkdir restored || framework_failure_
+if restorecon restored 2>/dev/null; then
+ # ... but when restored can be set to user_home_t
+ # So ensure the type for these mkdir -Z cases matches
+ # the directory type as set by restorecon.
+ ginstall -Z standard single || fail=1
+ ginstall -Z -d single_d || fail=1
+ # Run these as separate processes in case global context
+ # set for an arg, impacts on another arg
+ # TODO: Have the defaultcon() vary over these directories
+ for dst in single_d/existing/file multi/ple/file; do
+ ginstall -Z -D standard "$dst" || fail=1
+ done
+ restored_type=$(get_selinux_type 'restored')
+ test "$(get_selinux_type 'single')" = "$restored_type" || fail=1
+ test "$(get_selinux_type 'single_d')" = "$restored_type" || fail=1
+ test "$(get_selinux_type 'single_d/existing')" = "$restored_type" || fail=1
+ test "$(get_selinux_type 'multi')" = "$restored_type" || fail=1
+ test "$(get_selinux_type 'multi/ple')" = "$restored_type" || fail=1
+fi
+if test "$fail" = '1'; then
+ ls -UZd standard restored
+ ls -UZd single single_d single_d/existing multi multi/ple
+fi
+
+Exit $fail
diff --git a/tests/local.mk b/tests/local.mk
index ec23448..42d39f2 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -548,6 +548,7 @@ all_tests = \
tests/install/d-slashdot.sh \
tests/install/install-C.sh \
tests/install/install-C-selinux.sh \
+ tests/install/install-Z-selinux.sh \
tests/install/strip-program.sh \
tests/install/trap.sh \
tests/ln/backup-1.sh \
--
2.5.5
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