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Diffstat (limited to '')
| -rwxr-xr-x | modules.d/99img-lib/img-lib.sh | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/modules.d/99img-lib/img-lib.sh b/modules.d/99img-lib/img-lib.sh index 4700832..efc6475 100755 --- a/modules.d/99img-lib/img-lib.sh +++ b/modules.d/99img-lib/img-lib.sh @@ -106,3 +106,37 @@ unpack_img() { } fi } + +# parameter: <size of live image> in MiB +# Call emergency shell if ram size is too small for the image. +# Increase /run tmpfs size, if needed. +check_live_ram() { + local minmem imgsize memsize runsize runavail + minmem=$(getarg rd.minmem) + imgsize=$1 + memsize=$(($(check_meminfo MemTotal:) >> 10)) + # shellcheck disable=SC2046 + set -- $(findmnt -bnro SIZE,AVAIL /run) + # bytes to MiB + runsize=$(($1 >> 20)) + runavail=$(($2 >> 20)) + + [ "$imgsize" ] || { + warn "Image size could not be determined" + return 0 + } + + if [ $((memsize - imgsize)) -lt "${minmem:=1024}" ]; then + sed -i "N;/and attach it to a bug report./s/echo$/echo\n\ + echo \n\ + echo 'Warning!!!'\n\ + echo 'The memory size of your system is too small for this live image.'\n\ + echo 'Expect killed processes due to out of memory conditions.'\n\ + echo \n/" /usr/bin/dracut-emergency + + emergency_shell + elif [ $((runavail - imgsize)) -lt "$minmem" ]; then + # Increase /run tmpfs size, if needed. + mount -o remount,size=$((runsize - runavail + imgsize + minmem))M /run + fi +} |