Add some basic tests that exercise cputime limits with limits(1)

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

etc/mtree/BSD.tests.dist

@@ -554,6 +554,8 @@
         ..
         lastcomm
         ..
+        limits
+        ..
         m4
         ..
         mkimg

usr.bin/limits/Makefile

@@ -1,6 +1,12 @@
 # $FreeBSD$
 
+.include <src.opts.mk>
+
 PROG=	limits
 LIBADD=	util
 
+.if ${MK_TESTS} != "no"
+SUBDIR+=	tests
+.endif
+
 .include <bsd.prog.mk>

usr.bin/limits/tests/Makefile

@@ -0,0 +1,5 @@
+# $FreeBSD$
+
+ATF_TESTS_SH+=	limits_test
+
+.include <bsd.test.mk>

usr.bin/limits/tests/limits_test.sh

@@ -0,0 +1,65 @@
+#
+# Copyright 2015 EMC Corp.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# Make sure time(1) is consistent with the FreeBSD time command and not the
+# shell interpretation of time(1)
+TIME=/usr/bin/time
+
+atf_test_case cputime_hard_flag
+cputime_hard_flag_body()
+{
+
+	atf_check -e empty -o match:'cputime[[:space:]]+3 secs' -s exit:0 \
+	    limits -H -t 3 limits -H
+	atf_check -e empty -o match:'cputime[[:space:]]+3 secs' -s exit:0 \
+	    limits -H -t 3 limits -S
+	atf_check -e match:'real[[:space:]]+[34]\.[0-9][0-9]' -o empty -s signal:sigkill \
+	    limits -H -t 3 $TIME -p sh -c 'while : ; do : ; done'
+}
+
+SIGXCPU=24 # atf_check doesn't know sigxcpu
+
+atf_test_case cputime_soft_flag
+cputime_soft_flag_body()
+{
+
+	atf_check -e empty -o match:'cputime-max[[:space:]]+infinity secs' -s exit:0 \
+	    limits -S -t 3 limits -H
+	atf_check -e empty -o match:'cputime-cur[[:space:]]+3 secs' -s exit:0 \
+	    limits -S -t 3 limits -S
+	atf_check -e match:'real[[:space:]]+[34]\.[0-9][0-9]' -o empty -s signal:$SIGXCPU \
+	    limits -S -t 3 $TIME -p sh -c 'while : ; do : ; done'
+}
+
+atf_init_test_cases()
+{
+
+	atf_add_test_case cputime_hard_flag
+	atf_add_test_case cputime_soft_flag
+}