* [LTP] [PATCH v5 2/2] Rewrite utsname testing suite
2023-02-10 17:15 [LTP] [PATCH v5 0/2] Rewrite utstest suite Andrea Cervesato via ltp
2023-02-10 17:16 ` [LTP] [PATCH v5 1/2] Add SAFE_SETHOSTNAME macro Andrea Cervesato via ltp
@ 2023-02-10 17:16 ` Andrea Cervesato via ltp
2023-02-14 10:36 ` [LTP] [PATCH v5 0/2] Rewrite utstest suite Richard Palethorpe
2 siblings, 0 replies; 5+ messages in thread
From: Andrea Cervesato via ltp @ 2023-02-10 17:16 UTC (permalink / raw)
To: ltp
Deleted utstest.c and created the following new tests:
- utsname01
- utsname02
- utsname03
- utsname04
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
Deleted utsname.h
Usage of tst_reap_children
Cleaner code
runtest/containers | 16 +-
.../kernel/containers/utsname/.gitignore | 5 +-
testcases/kernel/containers/utsname/Makefile | 23 +-
.../containers/utsname/runutstests_noltp.sh | 41 --
.../kernel/containers/utsname/utsname01.c | 56 +++
.../kernel/containers/utsname/utsname02.c | 81 ++++
.../kernel/containers/utsname/utsname03.c | 118 ++++++
.../kernel/containers/utsname/utsname04.c | 52 +++
testcases/kernel/containers/utsname/utstest.c | 353 ------------------
9 files changed, 320 insertions(+), 425 deletions(-)
delete mode 100755 testcases/kernel/containers/utsname/runutstests_noltp.sh
create mode 100644 testcases/kernel/containers/utsname/utsname01.c
create mode 100644 testcases/kernel/containers/utsname/utsname02.c
create mode 100644 testcases/kernel/containers/utsname/utsname03.c
create mode 100644 testcases/kernel/containers/utsname/utsname04.c
delete mode 100644 testcases/kernel/containers/utsname/utstest.c
diff --git a/runtest/containers b/runtest/containers
index 2637b62fe..23f394579 100644
--- a/runtest/containers
+++ b/runtest/containers
@@ -62,16 +62,12 @@ semtest_2ns_clone semtest_2ns -m clone
semtest_2ns_unshare semtest_2ns -m unshare
sem_comm sem_comm
-utstest_unshare_1 utstest unshare 1
-utstest_unshare_2 utstest unshare 2
-utstest_unshare_3 utstest unshare 3
-utstest_unshare_4 utstest unshare 4
-utstest_unshare_5 utstest unshare 5
-utstest_clone_1 utstest clone 1
-utstest_clone_2 utstest clone 2
-utstest_clone_3 utstest clone 3
-utstest_clone_4 utstest clone 4
-utstest_clone_5 utstest clone 5
+utsname01 utsname01
+utsname02 utsname02
+utsname03_clone utsname03 -m clone
+utsname03_unshare utsname03 -m unshare
+utsname04_clone utsname04 -m clone
+utsname04_unshare utsname04 -m unshare
mountns01 mountns01
mountns02 mountns02
diff --git a/testcases/kernel/containers/utsname/.gitignore b/testcases/kernel/containers/utsname/.gitignore
index 0e1f41dc8..945ed280e 100644
--- a/testcases/kernel/containers/utsname/.gitignore
+++ b/testcases/kernel/containers/utsname/.gitignore
@@ -1 +1,4 @@
-/utstest
+/utsname01
+/utsname02
+/utsname03
+/utsname04
diff --git a/testcases/kernel/containers/utsname/Makefile b/testcases/kernel/containers/utsname/Makefile
index 5efcbf648..9c0158c01 100644
--- a/testcases/kernel/containers/utsname/Makefile
+++ b/testcases/kernel/containers/utsname/Makefile
@@ -1,28 +1,11 @@
-################################################################################
-## ##
-## Copyright (c) International Business Machines Corp., 2007 ##
-## ##
-## 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 2 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, write to the Free Software ##
-## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ##
-## ##
-################################################################################
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
top_srcdir ?= ../../../..
include $(top_srcdir)/include/mk/testcases.mk
include $(abs_srcdir)/../Makefile.inc
-LDLIBS := -lclone -lpthread -lrt $(LDLIBS)
+LDLIBS := -lclone $(LDLIBS)
include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/containers/utsname/runutstests_noltp.sh b/testcases/kernel/containers/utsname/runutstests_noltp.sh
deleted file mode 100755
index 43cb7e26b..000000000
--- a/testcases/kernel/containers/utsname/runutstests_noltp.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/sh
-################################################################################
-## ##
-## Copyright (c) International Business Machines Corp., 2007 ##
-## ##
-## 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 2 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, write to the Free Software ##
-## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ##
-## ##
-################################################################################
-
-oldhostname=`hostname`
-exit_code=0
-echo "unshare tests"
-for i in `seq 1 5`; do
- echo "test $i (unshare)"
- ./utstest_noltp unshare $i
- if [ $? -ne 0 ]; then
- exit_code=$?
- fi
-done
-echo "clone tests"
-for i in `seq 1 5`; do
- echo "test $i (clone)"
- ./utstest_noltp clone $i
- if [ $? -ne 0 ]; then
- exit_code=$?
- fi
-done
-hostname "$oldhostname"
-exit $exit_code
diff --git a/testcases/kernel/containers/utsname/utsname01.c b/testcases/kernel/containers/utsname/utsname01.c
new file mode 100644
index 000000000..fc5c1a271
--- /dev/null
+++ b/testcases/kernel/containers/utsname/utsname01.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Clone two plain processes and check if both read the same hostname.
+ */
+
+#define _GNU_SOURCE
+
+#include "tst_test.h"
+
+static char *hostname1;
+static char *hostname2;
+
+static void run(void)
+{
+ memset(hostname1, 0, HOST_NAME_MAX);
+ memset(hostname2, 0, HOST_NAME_MAX);
+
+ if (!SAFE_FORK()) {
+ SAFE_GETHOSTNAME(hostname1, HOST_NAME_MAX);
+ return;
+ }
+
+ if (!SAFE_FORK()) {
+ SAFE_GETHOSTNAME(hostname2, HOST_NAME_MAX);
+ return;
+ }
+
+ tst_reap_children();
+
+ TST_EXP_PASS(strcmp(hostname1, hostname2));
+}
+
+static void setup(void)
+{
+ hostname1 = SAFE_MMAP(NULL, HOST_NAME_MAX, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+ hostname2 = SAFE_MMAP(NULL, HOST_NAME_MAX, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+}
+
+static void cleanup(void)
+{
+ SAFE_MUNMAP(hostname1, HOST_NAME_MAX);
+ SAFE_MUNMAP(hostname2, HOST_NAME_MAX);
+}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .cleanup = cleanup,
+ .forks_child = 1,
+};
diff --git a/testcases/kernel/containers/utsname/utsname02.c b/testcases/kernel/containers/utsname/utsname02.c
new file mode 100644
index 000000000..aa90596d4
--- /dev/null
+++ b/testcases/kernel/containers/utsname/utsname02.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Clone two plain processes, change hostname in the first one then check if
+ * hostaname has changed inside the second one as well.
+ */
+
+#define _GNU_SOURCE
+
+#include "tst_test.h"
+
+#define HOSTNAME "LTP_HOSTNAME"
+
+static char *hostname1;
+static char *hostname2;
+static char originalhost[HOST_NAME_MAX];
+
+static void reset_hostname(void)
+{
+ SAFE_SETHOSTNAME(originalhost, strlen(originalhost));
+}
+
+static void run(void)
+{
+ memset(hostname1, 0, HOST_NAME_MAX);
+ memset(hostname2, 0, HOST_NAME_MAX);
+
+ if (!SAFE_FORK()) {
+ SAFE_SETHOSTNAME(HOSTNAME, strlen(HOSTNAME));
+ SAFE_GETHOSTNAME(hostname1, HOST_NAME_MAX);
+
+ TST_CHECKPOINT_WAKE(0);
+ return;
+ }
+
+ if (!SAFE_FORK()) {
+ TST_CHECKPOINT_WAIT(0);
+
+ SAFE_GETHOSTNAME(hostname2, HOST_NAME_MAX);
+ return;
+ }
+
+ tst_reap_children();
+
+ TST_EXP_PASS(strcmp(hostname1, HOSTNAME));
+ TST_EXP_PASS(strcmp(hostname2, HOSTNAME));
+
+ reset_hostname();
+}
+
+static void setup(void)
+{
+ hostname1 = SAFE_MMAP(NULL, HOST_NAME_MAX, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+ hostname2 = SAFE_MMAP(NULL, HOST_NAME_MAX, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+
+ memset(originalhost, 0, HOST_NAME_MAX);
+
+ SAFE_GETHOSTNAME(originalhost, HOST_NAME_MAX);
+}
+
+static void cleanup(void)
+{
+ SAFE_MUNMAP(hostname1, HOST_NAME_MAX);
+ SAFE_MUNMAP(hostname2, HOST_NAME_MAX);
+
+ reset_hostname();
+}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .cleanup = cleanup,
+ .needs_root = 1,
+ .forks_child = 1,
+ .needs_checkpoints = 1,
+};
diff --git a/testcases/kernel/containers/utsname/utsname03.c b/testcases/kernel/containers/utsname/utsname03.c
new file mode 100644
index 000000000..6b94b452e
--- /dev/null
+++ b/testcases/kernel/containers/utsname/utsname03.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) International Business Machines Corp., 2007
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Clone two processes using CLONE_NEWUTS, change hostname from the first
+ * container and check if hostname didn't change inside the second one.
+ */
+
+#define _GNU_SOURCE
+
+#include "tst_test.h"
+#include "lapi/sched.h"
+
+#define HOSTNAME "LTP_HOSTNAME"
+
+static char *str_op;
+static char *hostname1;
+static char *hostname2;
+static char originalhost[HOST_NAME_MAX];
+
+static void reset_hostname(void)
+{
+ SAFE_SETHOSTNAME(originalhost, strlen(originalhost));
+}
+
+static void child1_run(void)
+{
+ SAFE_SETHOSTNAME(HOSTNAME, strlen(HOSTNAME));
+ SAFE_GETHOSTNAME(hostname1, HOST_NAME_MAX);
+
+ TST_CHECKPOINT_WAKE(0);
+}
+
+static void child2_run(void)
+{
+ TST_CHECKPOINT_WAIT(0);
+
+ SAFE_GETHOSTNAME(hostname2, HOST_NAME_MAX);
+}
+
+static void run(void)
+{
+ const struct tst_clone_args cargs = { CLONE_NEWUTS, SIGCHLD };
+
+ memset(hostname1, 0, HOST_NAME_MAX);
+ memset(hostname2, 0, HOST_NAME_MAX);
+
+ if (!str_op || !strcmp(str_op, "clone")) {
+ tst_res(TINFO, "clone() with CLONE_NEWUTS");
+
+ if (!SAFE_CLONE(&cargs)) {
+ child1_run();
+ return;
+ }
+
+ if (!SAFE_CLONE(&cargs)) {
+ child2_run();
+ return;
+ }
+ } else {
+ tst_res(TINFO, "unshare() with CLONE_NEWUTS");
+
+ if (!SAFE_FORK()) {
+ SAFE_UNSHARE(CLONE_NEWUTS);
+ child1_run();
+ return;
+ }
+
+ if (!SAFE_FORK()) {
+ SAFE_UNSHARE(CLONE_NEWUTS);
+ child2_run();
+ return;
+ }
+ }
+
+ tst_reap_children();
+
+ TST_EXP_PASS(strcmp(hostname1, HOSTNAME));
+ TST_EXP_PASS(strcmp(hostname2, originalhost));
+
+ reset_hostname();
+}
+
+static void setup(void)
+{
+ hostname1 = SAFE_MMAP(NULL, HOST_NAME_MAX, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+ hostname2 = SAFE_MMAP(NULL, HOST_NAME_MAX, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+
+ memset(originalhost, 0, HOST_NAME_MAX);
+
+ SAFE_GETHOSTNAME(originalhost, HOST_NAME_MAX);
+}
+
+static void cleanup(void)
+{
+ SAFE_MUNMAP(hostname1, HOST_NAME_MAX);
+ SAFE_MUNMAP(hostname2, HOST_NAME_MAX);
+
+ reset_hostname();
+}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .cleanup = cleanup,
+ .needs_root = 1,
+ .forks_child = 1,
+ .needs_checkpoints = 1,
+ .options = (struct tst_option[]) {
+ { "m:", &str_op, "Test execution mode <clone|unshare>" },
+ {},
+ },
+};
diff --git a/testcases/kernel/containers/utsname/utsname04.c b/testcases/kernel/containers/utsname/utsname04.c
new file mode 100644
index 000000000..e8d636d0d
--- /dev/null
+++ b/testcases/kernel/containers/utsname/utsname04.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Drop root privileges, create a container with CLONE_NEWUTS and verify that
+ * we receive a permission error.
+ */
+
+#define _GNU_SOURCE
+
+#include <pwd.h>
+#include "tst_test.h"
+#include "lapi/sched.h"
+
+static char *str_op;
+
+static void run(void)
+{
+ const struct tst_clone_args cargs = { CLONE_NEWUTS, SIGCHLD };
+ struct passwd *pw;
+
+ tst_res(TINFO, "Dropping root privileges");
+
+ pw = SAFE_GETPWNAM("nobody");
+ SAFE_SETRESUID(pw->pw_uid, pw->pw_uid, pw->pw_uid);
+
+ if (!str_op || !strcmp(str_op, "clone")) {
+ TST_EXP_EQ_LI(tst_clone(&cargs), -1);
+ TST_EXP_PASS(errno == EPERM);
+ } else {
+ if (!SAFE_FORK()) {
+ TST_EXP_EQ_LI(unshare(CLONE_NEWUTS), -1);
+ TST_EXP_PASS(errno == EPERM);
+ return;
+ }
+ }
+}
+
+static struct tst_test test = {
+ .test_all = run,
+ .needs_root = 1,
+ .forks_child = 1,
+ .needs_checkpoints = 1,
+ .options = (struct tst_option[]) {
+ { "m:", &str_op, "Test execution mode <clone|unshare>" },
+ {},
+ },
+};
diff --git a/testcases/kernel/containers/utsname/utstest.c b/testcases/kernel/containers/utsname/utstest.c
deleted file mode 100644
index 9ad19b6b2..000000000
--- a/testcases/kernel/containers/utsname/utstest.c
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
-* Copyright (c) International Business Machines Corp., 2007
-* 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 2 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, write to the Free Software
-* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-*
-***************************************************************************
- * Copyright 2007 IBM
- * Author: Serge Hallyn <serue@us.ibm.com>
- *
- * test1:
- P1: A=gethostname
- P2: B=gethostname
- Ensure(A==B)
-
- * test2:
- P1: sethostname(A);
- P2: (wait); B=gethostname
- Ensure (A==B)
-
- * test3:
- P1: A=gethostname; unshare(utsname); sethostname(newname); C=gethostname
- P2: B=gethostname; (wait); (wait); D=gethostname
- Ensure (A==B && A==D && C!=D)
-
- * test4:
- P1: A=gethostname; unshare(utsname); (wait); C=gethostname
- P2: B=gethostname; (wait); sethostname(newname); D=gethostname
- Ensure (A==B && A==C && C!=D)
-
- * test5:
- P1: drop_privs(); unshare(utsname); (wait); C=gethostname
- P2: (wait); sethostname(B); D=gethostname
- Ensure (B==C==D) and state is ok.
- *
- */
-
-#define _GNU_SOURCE 1
-#include <sys/wait.h>
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include "libclone.h"
-#include "test.h"
-#include "safe_macros.h"
-
-char *TCID = "uts_namespace";
-int TST_TOTAL = 1;
-
-static int dummy_child(void *v)
-{
- (void) v;
- return 0;
-}
-
-static void check_newuts(void)
-{
- int pid, status;
-
- pid = do_clone_unshare_test(T_CLONE, CLONE_NEWUTS, dummy_child, NULL);
- if (pid == -1)
- tst_brkm(TCONF | TERRNO, NULL, "CLONE_NEWUTS not supported");
-
- SAFE_WAIT(NULL, &status);
-}
-
-int drop_root(void)
-{
- int ret;
- ret = setresuid(1000, 1000, 1000);
- if (ret) {
- perror("setresuid");
- exit(4);
- }
- return 1;
-}
-
-#define HLEN 100
-#define NAME1 "serge1"
-#define NAME2 "serge2"
-
-int p1fd[2], p2fd[2];
-static char oldhost[HLEN];
-pid_t cpid;
-
-void picknewhostname(char *orig, char *new)
-{
- memset(new, 0, HLEN);
- if (strcmp(orig, NAME1) == 0)
- strcpy(new, NAME2);
- else
- strcpy(new, NAME1);
-}
-
-void zeroize(char *s)
-{
- memset(s, 0, HLEN);
-}
-
-char *tsttype;
-int P1(void *vtest)
-{
- char hostname[HLEN], newhostname[HLEN], rhostname[HLEN];
- int err;
- int len;
- int testnum;
-
- testnum = atoi((char *)vtest);
-
- close(p1fd[1]);
- close(p2fd[0]);
-
- switch (testnum) {
- case 1:
- gethostname(hostname, HLEN);
- zeroize(rhostname);
- len = read(p1fd[0], rhostname, HLEN);
- if (strcmp(hostname, rhostname) == 0) {
- tst_resm(TPASS, "test 1 (%s): success", tsttype);
- tst_exit();
- }
- tst_brkm(TFAIL, NULL,
- "test 1 (%s): hostname 1 %s, hostname 2 %s",
- tsttype, hostname, rhostname);
- case 2:
- gethostname(hostname, HLEN);
- picknewhostname(hostname, newhostname);
- err = sethostname(newhostname, strlen(newhostname));
- write(p2fd[1], "1", 1);
- if (err == -1) {
- tst_brkm(TFAIL, NULL,
- "test 2 (%s): failed to sethostname",
- tsttype);
- }
- zeroize(rhostname);
- len = read(p1fd[0], rhostname, HLEN);
- if (strcmp(newhostname, rhostname) == 0) {
- tst_resm(TPASS, "test 2 (%s): success", tsttype);
- tst_exit();
- }
- tst_brkm(TFAIL, NULL,
- "test 2 (%s) hostname 1 %s, hostname 2 %s",
- tsttype, newhostname, rhostname);
- case 3:
- gethostname(hostname, HLEN);
- picknewhostname(hostname, newhostname);
- err = sethostname(newhostname, strlen(newhostname));
- write(p2fd[1], "1", 1);
- if (err == -1) {
- tst_brkm(TFAIL, NULL,
- "test 3 (%s): failed to sethostname",
- tsttype);
- }
-
- zeroize(rhostname);
- len = read(p1fd[0], rhostname, HLEN);
- if (strcmp(newhostname, rhostname) == 0) {
- tst_brkm(TFAIL,
- NULL,
- "test 3 (%s): hostname 1 %s, hostname 2 %s, these should have been different",
- tsttype, newhostname, rhostname);
- }
- if (strcmp(hostname, rhostname) == 0) {
- tst_resm(TPASS, "test 3 (%s): success", tsttype);
- tst_exit();
- }
- tst_brkm(TFAIL,
- NULL,
- "test 3 (%s): hostname 1 %s, hostname 2 %s, should have been same",
- tsttype, hostname, rhostname);
-
- case 4:
- gethostname(hostname, HLEN);
- write(p2fd[1], "1", 1); /* tell p2 to go ahead and sethostname */
- zeroize(rhostname);
- len = read(p1fd[0], rhostname, HLEN);
- gethostname(newhostname, HLEN);
- if (strcmp(hostname, newhostname) != 0) {
- tst_brkm(TFAIL,
- NULL,
- "test 4 (%s): hostname 1 %s, hostname 2 %s, should be same",
- tsttype, hostname, newhostname);
- }
- if (strcmp(hostname, rhostname) == 0) {
- tst_brkm(TFAIL,
- NULL,
- "test 4 (%s): hostname 1 %s, hostname 2 %s, should be different",
- tsttype, hostname, rhostname);
- }
- tst_resm(TPASS, "test 4 (%s): successful", tsttype);
- tst_exit();
- case 5:
- write(p2fd[1], "1", 1); /* tell p2 to go ahead and sethostname */
- zeroize(rhostname);
- len = read(p1fd[0], rhostname, HLEN);
- gethostname(newhostname, HLEN);
- if (strcmp(rhostname, newhostname) != 0) {
- tst_brkm(TFAIL,
- NULL,
- "test 5 (%s): hostnames %s and %s should be same",
- tsttype, rhostname, newhostname);
- }
- tst_resm(TPASS, "test 5 (%s): successful", tsttype);
- tst_exit();
- default:
- break;
- }
- tst_exit();
-}
-
-int P2(void *vtest)
-{
- char hostname[HLEN], newhostname[HLEN];
- int len;
- int testnum;
-
- testnum = atoi((char *)vtest);
-
- close(p1fd[0]);
- close(p2fd[1]);
-
- switch (testnum) {
- case 1:
- gethostname(hostname, HLEN);
- write(p1fd[1], hostname, strlen(hostname));
- break;
- case 2:
- case 3:
- len = 0;
- while (!len) {
- len = read(p2fd[0], hostname, 1);
- }
- gethostname(hostname, HLEN);
- write(p1fd[1], hostname, strlen(hostname));
- break;
- case 4:
- case 5:
- len = 0;
- while (!len) {
- len = read(p2fd[0], hostname, 1);
- }
- if (hostname[0] == '0') {
- tst_resm(TPASS, "P2: P1 claims error");
- return 0;
- }
- gethostname(hostname, HLEN);
- picknewhostname(hostname, newhostname);
- sethostname(newhostname, strlen(newhostname));
- write(p1fd[1], newhostname, strlen(newhostname));
- break;
- default:
- tst_resm(TFAIL, "undefined test: %d", testnum);
- break;
- }
- return 0;
-}
-
-static void setup(void)
-{
- gethostname(oldhost, HLEN);
- tst_require_root();
- check_newuts();
-}
-
-static void cleanup(void)
-{
- sethostname(oldhost, strlen(oldhost));
-}
-
-#define UNSHARESTR "unshare"
-#define CLONESTR "clone"
-int main(int argc, char *argv[])
-{
- int r, pid, use_clone = T_UNSHARE;
- int testnum;
- void *vtest;
-
- setup();
- if (argc != 3) {
- tst_resm(TFAIL, "Usage: %s <clone|unshare> <testnum>",
- argv[0]);
- tst_resm(TFAIL,
- " where clone or unshare specifies unshare method,");
- tst_resm(TFAIL, " and testnum is between 1 and 5 inclusive");
- exit(2);
- }
- if (pipe(p1fd) == -1) {
- perror("pipe");
- exit(EXIT_FAILURE);
- }
- if (pipe(p2fd) == -1) {
- perror("pipe");
- exit(EXIT_FAILURE);
- }
-
- tsttype = UNSHARESTR;
- if (strcmp(argv[1], "clone") == 0) {
- use_clone = T_CLONE;
- tsttype = CLONESTR;
- }
-
- testnum = atoi(argv[2]);
-
- vtest = (void *)argv[2];
- switch (testnum) {
- case 1:
- case 2:
- r = do_clone_unshare_tests(T_NONE, 0, P1, vtest, P2, vtest);
- break;
- case 3:
- case 4:
- r = do_clone_unshare_tests(use_clone, CLONE_NEWUTS,
- P1, vtest, P2, vtest);
- break;
- case 5:
- pid = fork();
- if (pid == -1) {
- perror("fork");
- exit(2);
- }
- if (pid == 0) {
- if (!drop_root()) {
- tst_brkm(TFAIL, NULL, "failed to drop root.");
- }
- r = do_clone_unshare_test(use_clone, CLONE_NEWUTS,
- P1, vtest);
- write(p2fd[1], "0", 1); /* don't let p2 hang */
- exit(0);
- } else {
- P2(vtest);
- }
- break;
- default:
- tst_resm(TFAIL,
- "testnum should be between 1 and 5 inclusive.");
- break;
- }
-
- cleanup();
- tst_exit();
-}
--
2.35.3
--
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