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49 lines
1.1 KiB
49 lines
1.1 KiB
3 years ago
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#!/bin/sh -e
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# tally up sizes of chroot's ELF binaries for squashfs tuning
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# NB: it's unclear so far whether mksquashfs -sort is beneficial
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if [ -z "$GLOBAL_SQUASHFS_SORT" -o "$GLOBAL_SQUASHFS" != "tight" ]; then
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echo "SKIP elf-stats: looks like it's not needed" >&2
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exit 0
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fi
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exit_handler()
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{
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local rc=$1
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rm -f -- "$TMPFILE"
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exit $rc
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}
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# it's controlled environment
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TMPFILE="$(mktemp)"
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trap 'exit_handler $?' EXIT HUP PIPE INT QUIT TERM
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# a list of ELF binaries (both executables and shared libraries)
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ELFLIST=/.our/elf.lst
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cd "$WORKDIR"
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# let's parallelize a bit, chroot should be on tmpfs or just-cached
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du -bsx | cut -f1 > "$TMPFILE" &
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elf="$(find {,usr/}{lib*,{,s}bin} \
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-path lib/modules -prune -o \
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-path usr/lib/locale -prune -o \
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-type f \
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| file -nN -e ascii -e compress -e tar -e elf -f - \
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| sed -n "/: ELF /s/: .*$//p" \
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| tee "$ELFLIST.in" \
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| tr '\n' '\0' \
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| du -cb --files0-from=- \
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| tail -1 \
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| cut -f1)"
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wait
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read root < "$TMPFILE"
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echo "** live chroot ELF ratio: $((100*$elf/$root))% ($elf/$root)" >&2
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# add priorities
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sed 's,^.*$,& 1,' < "$ELFLIST.in" > "$ELFLIST"
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