1 files changed, 111 insertions, 0 deletions
diff --git a/tests/ts/ipcs/functions.sh b/tests/ts/ipcs/functions.sh
new file mode 100644
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@@ -0,0 +1,111 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2007 Karel Zak <kzak@redhat.com>
+#
+# This file is part of util-linux.
+#
+# This file 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 file 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.
+#
+
+test -f /proc/sys/kernel/shmall || ts_skip "no /proc"
+
+PAGE_SIZE=$($TS_HELPER_SYSINFO pagesize)
+
+# kernel files
+IPCS_PROCFILES=(
+	/proc/sys/kernel/shmmni
+	/proc/sys/kernel/shmall
+	/proc/sys/kernel/shmmax
+)
+
+# raw data converted to ipcs-like format
+#	shmmni = same
+#	shmall = from pages to KBytes
+#	shmmax = from bytes to KBytes
+#
+IPCS_KERNEL_CMD=(
+	"cat /proc/sys/kernel/shmmni"
+	"echo \$(cat /proc/sys/kernel/shmall) / 1024 \* $PAGE_SIZE | bc -l | sed 's/\..*//'"
+	"echo \$(cat /proc/sys/kernel/shmmax) / 1024 | bc -l | sed 's/\..*//'"
+)
+
+# data from the ipcs command
+IPCS_CMD=(
+	"$TS_CMD_IPCS -m -l | awk '/max number of segments/ { print \$6 }'"
+	"$TS_CMD_IPCS -m -l | awk '/max total shared memory/ { print \$7 }'"
+	"$TS_CMD_IPCS -m -l | awk '/max seg size/ { print \$6 }'"
+)
+
+
+# The linux kernel accepts ULONG_MAX, but this value is same like ULLONG_MAX on
+# 64-bit archs. So the ipcs command has to always overflow on 64-bit archs when
+# shmall (=num of pages!) is same or almost same like ULONG_MAX. This is reason
+# why we for the test uses 32-bit limits on all archs.
+#
+# (Don't worry that 64-bit ULONG_MAX makes ipcs useless ...
+#  ... it's a problem for admins who want to use 75557863725TB of RAM for shm)
+#
+IPCS_LIMITS=(
+	$($TS_HELPER_SYSINFO INT_MAX)
+	$($TS_HELPER_SYSINFO ULONG_MAX32)
+	$($TS_HELPER_SYSINFO ULONG_MAX32)
+)
+
+# list of indexes = 0..(sizeof Array - 1)
+IPCS_IDX=$(seq 0 $(( ${#IPCS_PROCFILES[*]} - 1 )))
+
+# checker
+function ipcs_limits_check {
+	for i in $IPCS_IDX; do
+
+		echo -n ${IPCS_PROCFILES[$i]}
+
+		a=$(eval ${IPCS_KERNEL_CMD[$i]})
+		b=$(eval ${IPCS_CMD[$i]})
+
+		#echo
+		#echo "KERNEL-CMD: ${IPCS_KERNEL_CMD[$i]}"
+		#echo "KERNEL-RAW: $(cat ${IPCS_PROCFILES[$i]})"
+		#echo "IPCS-CMD:   ${IPCS_CMD[$i]}"
+		#echo
+
+		# overflow is handled differently because we don't have large
+		# int math, see https://github.com/karelzak/util-linux/issues/51
+		if [ $(bc <<<"$a >= 2^64/1024") -eq 1 ]; then
+			a=$(bc <<<"(2^64 - $PAGE_SIZE)/1024")
+		fi
+
+		if [ x"$a" == x"$b" ]; then
+			echo " OK"
+		else
+			echo " kernel=$a, ipcs=$b"
+		fi
+	done
+}
+
+# Read 'ipcmk' output, such as 'Shared memory id: 22839299' and
+# write the message to two files: (1) something what one can
+# compare as test output, and (2) id which ipcrm later will use
+# for deletion.
+ipcmk_output_handler() {
+	awk -v text=$1 -v num=$2 '
+	function isnum(x) {
+		return(x == x + 0)
+	}
+	{
+		if (isnum($NF)) {
+			print $NF >> num
+			$NF="<was_number>"
+		}
+		print $0 >> text
+	}'
+}