48 lines
2.3 KiB
Bash
48 lines
2.3 KiB
Bash
etc_ok() {
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local f n=0 now; now=$(date +%s)
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[ -s /root/lab-answers/2-etc ] || return 1
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while read -r f; do
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[ -n "$f" ] || continue
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case $f in /etc/*) ;; *) return 1 ;; esac
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[ -e "$f" ] || continue
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# Changed within a day of the answer being written (with an hour to spare).
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[ $(( $(stat -c %Y /root/lab-answers/2-etc) - $(stat -c %Y "$f") )) -le 90000 ] || return 1
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n=$((n + 1))
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done </root/lab-answers/2-etc
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[ "$n" -gt 0 ]
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}
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usr_ok() {
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local want got
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want=$(find /usr -xdev -type f -size +10M 2>/dev/null | sort)
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got=$(grep -o '/usr/[^[:space:]]*' /root/lab-answers/2-usr 2>/dev/null | sort -u)
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[ -n "$want" ] && [ -z "$(comm -23 <(printf '%s\n' "$want") <(printf '%s\n' "$got"))" ] || return 1
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# and nothing much under 10 MiB.
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local f
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for f in $got; do [ ! -f "$f" ] || [ "$(stat -c %s "$f")" -ge 10000000 ] || return 1; done
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}
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compress_ok() {
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local d=/root/compress g b x
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g=$(ls "$d"/*.gz 2>/dev/null | head -n1); b=$(ls "$d"/*.bz2 2>/dev/null | head -n1); x=$(ls "$d"/*.xz 2>/dev/null | head -n1)
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[ -n "$g" ] && [ -n "$b" ] && [ -n "$x" ] || return 1
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[ -n "$(gzip -dc "$g" | head -c1)" ] || return 1
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cmp -s <(gzip -dc "$g") <(bzip2 -dc "$b") && cmp -s <(gzip -dc "$g") <(xz -dc "$x")
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}
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task 1 "/root/practice/a, b and c, with a file in each"
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need "/root/practice/a, b and c each hold a file" 'for x in a b c; do [ -n "$(find /root/practice/$x -mindepth 1 -maxdepth 1 -type f)" ] || exit 1; done'
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task 2 "Recent files under /etc and big files under /usr listed"
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need "/root/lab-answers/2-etc lists files under /etc changed in the day before" etc_ok
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need "/root/lab-answers/2-usr lists every file over 10 MiB under /usr" usr_ok
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task 3 "/etc archived with xz; etc/hostname extracted into /tmp"
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need "/root/etc.tar.xz is an xz-compressed tar of /etc" 'tar -tJf /root/etc.tar.xz | grep -qx "etc/passwd"'
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need "/tmp/etc/hostname was extracted from it" '[ -f /tmp/etc/hostname ] && tar -xJOf /root/etc.tar.xz etc/hostname | cmp -s - /tmp/etc/hostname'
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task 4 "One log compressed three ways"
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need "/root/compress holds .gz, .bz2 and .xz copies of the same file" compress_ok
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task 5 "The first megabyte of /dev/loop40 copied with dd"
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need "/root/first-mb.img is 1 MiB" '[ "$(stat -c %s /root/first-mb.img)" = 1048576 ]'
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need "it matches the start of /dev/loop40" 'head -c 1048576 /dev/loop40 | cmp -s - /root/first-mb.img'
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