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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 13:14:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 13:14:44 +0000 |
commit | 30ff6afe596eddafacf22b1a5b2d1a3d6254ea15 (patch) | |
tree | 9b788335f92174baf7ee18f03ca8330b8c19ce2b /tests/ts/ipcs/functions.sh | |
parent | Initial commit. (diff) | |
download | util-linux-30ff6afe596eddafacf22b1a5b2d1a3d6254ea15.tar.xz util-linux-30ff6afe596eddafacf22b1a5b2d1a3d6254ea15.zip |
Adding upstream version 2.36.1.upstream/2.36.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | tests/ts/ipcs/functions.sh | 111 |
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 index 0000000..586ce42 --- /dev/null +++ b/tests/ts/ipcs/functions.sh @@ -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 + }' +} |