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ΞεΩʔΞʔτ
ϫϯϥΠφʔ
@ୈ25ճγΣϧܳษڧձ େࡕαςϥΠτ (2016.10.29)
MSR (@msr386)
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࣍
➤ ࣗݾհ
➤ ࠓ·Ͱͷল
➤ ΞεΩʔΞʔτͳγΣϧܳ (όφʔܳ)
➤ ಥવͷࢮ
➤ slίϚϯυ
➤ λʔϛφϧը໘Λ͙ͪΌ͙ͪΌʹ͢Δ
➤ ·ͱΊ
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ࣗݾհ
➤ ϋϯυϧωʔϜ: MSR (@msr386)
➤ C++ϓϩάϥϛϯάɺαʔόʔӡ༻͕ಘҙ
➤ ٻ৬த
➤ Chromium Contributor (1ճ͚ͩ)
➤ Webϒϥβ࡞͍ͬͯ·͢ (http://app.tungsten-start.net/)
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ࠓ·Ͱͷল
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͜Ε·Ͱͷࣗͷओͳ
LTൃදΛৼΓฦΔͱ
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(1)Χφμͷങ͍ΓVPSͷհ
ӡ༻ʹ͑ͳ͍͚ͲγΣϧܳ࿉ʹͽͬͨΓ?
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(2) QRίʔυγΣϧܳ?
QRةݥγΣϧܳ / QRίʔυγΣϧܳͷՄೳੑΛࡧ
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΄ͱΜͲγΣϧܳͱ
ؔͳ͍͡ΌΜ
(ΨνͷγΣϧܳΖ͏ͥ)
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࠷ۙͷόφʔܳͱ͍͏
ྲྀߦʹΓ
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ΞεΩʔΞʔτγΣϧ
ܳΛΓ·͢
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1. ಥવͷࢮ
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?P?
ɹɹc
ɹɹ
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ʘ ?P?
ɹʘc
ɹɹɹʼ
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ʻ ?P?
ʼ
ɹࡾ
ࡾ
ʻʉʉʼ
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Є ?P?
ɹʻ
ʼάΩο
ʻʉʉʼ
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ʊਓਓਓਓʊ
ʼಥવͷࢮʻ
ʉ:?:?:?:ʉ
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ಥવͷࢮ
➤ 2012ࠒɺͱ͋Δܝࣔ൘ʹॻ͖ࠐ·Εͨͷ͕ݩωλͱݴΘΕ͍ͯΔ
➤ ࠷ޙͷғΈจࣈͷΞεΩʔΞʔτ͚͕ͩΑ͘ΘΕ͍ͯΔ
➤ 2013ʹTwitterͰվߦίʔυ͕ରԠ͔ͯ͠Βڻҟతʹ֦ࢄ
➤ ओͳಛ
➤ ൚༻ੑͷߴ͞
➤ ΞεΩʔΞʔτͷ୯७͞
➤ ݟͨͷྗڧ͞
➤ ʮಥવͷࢮδΣωϨʔλʔʯͱ͍͏໊લͰWebαʔϏεԽɺiOSAndroid͚ʹΞϓ
ϦԽ͞Ε͍ͯΔ
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ಥવͷࢮɹγΣϧεΫϦϓτ൛͕ଘࡏ
➤ γΣϧεΫϦϓτ͋Δ (https://fumiyas.github.io/2013/12/25/echo-sd.sh-advent-calendar.html)
$ echo -e "crontab -r\n突然の危険シェル芸" | echo-sd -s --center
＿人人人人人人人人人人人＿
＞ crontab -r ＜
＞ 突然の危険シェル芸 ＜
‾Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^‾
$
$ echo-sd -v 縦書き
＿人人＿
＞ 縦 ＜
＞ 書 ＜
＞ き ＜
‾Y^Y^‾
$
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ಥવͷࢮɹγΣϧεΫϦϓτ൛͕ଘࡏ
➤ ॎॻ͖ɺɺετϨεൃੜաఔϞʔυɺπΠʔτػೳͳͲػೳ͕๛
$ echo-sd --stress "crontab: no crontab for
root" あれ？中身消えてる "(historyの結果)
334 sudo crontab -r" "eとr押し間違い!バック
アップない!!" 危険シェル芸
crontab: no crontab for root
↘
あれ？中身消えてる
⾫
(historyの結果) 334 sudo crontab -r
↘
eとr押し間違い!バックアップない!!
⾫
＿人人人人人人人人＿
＞ 危険シェル芸 ＜
‾Y^Y^Y^Y^Y^Y^Y^Y^‾
$ echo-sd --tanzaku ":(){ :|:& };:"
┏-┷-┓
┃ ‥ ┃
┃ ⏜ ┃
┃ ⏝ ┃
┃ ⏞ ┃
┃ ┃
┃ ‥ ┃
┃ | ┃
┃ ‥ ┃
┃ & ┃
┃ ┃
┃ ⏟ ┃
┃ ; ┃
┃ ‥ ┃
┗━━┛
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ϫϯϥΠϯ࣮ɺ։࢝
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࢝ΊΔલʹ
୯७ԽͷͨΊʹɺҎԼͷΑ͏ͳखൈ͖Λ͠·͢
➤ ෯ϑΥϯτʹಛԽ
➤ 1ߦ͚ͩରԠ
ෳߦͰߟྀ͖͢͜ͱ͕૿͑ΔͨΊ
➤ શ֯จࣈ͚ͩରԠ
֯จࣈͱΓ͋͑ͣແࢹ͢Δ
➤ LANG=ja_JP
.UTF-8 લఏ
LANGʹΑΓจࣈܭࢉ͕͓͔͘͠ͳΒͳ͍Α͏ʹ͢ΔͨΊ
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੍࡞աఔ
1. ಛΛଊ͑Δ
＿人人人人人人＿
＞ 突然の死 ＜
‾Y^Y^Y^Y^Y^Y^‾
ಥવͷࢮɺจࣈʹԠ্ͯ͡෦ɺԼ෦ͷจࣈ͕มԽ͢Δ
→্෦ʮਓʯͱԼ෦ʮY^ʯΛશ֯1จࣈʹରͯ͠1ݸͣͭ૿ͤΑ͍
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੍࡞աఔ
2. จࣈΛௐΔʹ?
awkͷlength()Λ༻͢Δ
for (i=0; i
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ಥવͷϫϯϥΠφʔ୯७൛
$ echo 突然の死 | awk \
'{for(i=0;i
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ಥવͷϫϯϥΠφʔ୯७൛ɹ࣮ߦྫ
$ echo 突然の死 | awk '{for(i=0;i
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ಥવͷϫϯϥΠφʔ୯७൛ͷಛͱ
ಛ
➤ awkҰൃܳ
➤ πΠʔτՄೳ(112จࣈ)
➤ ֯จࣈࠞ͟ΔͱͣΕΔͷखൈ͖͠ա͗͡Όͳ͍?
֯จࣈͰͣΕΔݪҼɺawkͷlength()ͷ༷
➤ LANGڥมʹґଘ
➤ ja_JP
.UTF-8ͷ߹ɺશ֯֯1Λฦ͢
➤ ͳΒɺશ֯2ɺ֯1ΛฦͤͣΕͳ͍ΑͶ?
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ಥવͷϫϯϥΠφʔվྑ൛
$ echo 突然の死 | awk \
'{for(i=1;i<=length();i++){ \
len+=(substr($0,i,1)~/[\x01-\x7E]/)?1:2} \
for(i=0;i
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ಥવͷϫϯϥΠφʔվྑ൛ɹ࣮ߦྫ
$ echo 突然のワンライナーEx | awk '{for(i=1;i<=length();i++){len
+=(substr($0,i,1)~/[\x01-\x7E]/)?1:2}for(i=0;i
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ಥવͷϫϯϥΠφʔվྑ൛ͷಛ
➤ վળ
➤ ͕֯ࠞͬͯͣ͟Εͳ͍
➤ վѱ
➤ πΠʔτෆՄ
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վྑ൛ͷղઆ
➤ awkΛܗ͢Δͱ͜ͷΑ͏ʹͳΔ
{
for(i = 1; i <= length(); i++) {
len += ( substr($0,i,1) ~/[\x01-\x7E]/ ) ? 1 : 2
}
for(i = 0; i < len / 2 + 2; i++) {
up = up "ਓ";
dn = dn "Y^"
}
printf("ʊ%sʊ\nʼɹ%sɹʻ\nʉ%sʉ\n", up, $0, dn)
}
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վྑ൛ͷղઆ
(1.)
for(i = 1; i <= length(); i++) {
len +=
(substr($0,i,1)~/[\x01-\x7E]/)
? 1 : 2
}
(2.)
for(i = 0; i < len / 2 + 2; i++) {
up = up "ਓ";
dn = dn "Y^"
}
(3.)
printf("ʊ%sʊ\nʼɹ%sɹʻ\nʉ%sʉ\n",
up, $0, dn)
1. จࣈΛऔಘ
1จࣈͣͭऔΓग़͠ɺจࣈ͕UTF-8Ͱ1όΠτ
จࣈͰ͋Δ߹1ɺͦΕҎ֎2ͱ͢Δɻ
UTF-8ͷ1όΠτจࣈɺ0x01ʙ0x7eؚ͕·
Ε͍ͯΔ͔Ͳ͏͔Ͱఆ͢Δɻ
2. ্෦ʮਓʯɺԼ෦ʮY^ʯΛจࣈʹԠͯ͡
૿͢
૿͢શ֯ج४Ͱ͋Δ͜ͱʹҙ
3. printfͰܗ
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͞ΒͳΔվྑͷಓ
➤ ෳߦରԠ
➤ ϧʔϓճΛݮΒ͢ͳͲͷ࠷దԽ
➤ awkΛΘͳ͍ํ๏
➤ etc.
➤ ͬͱ͍͍ํ๏͋ΔͣͳͷͰɺՋͳͱ͖ʹνϟϨϯδ͠·͠ΐ͏
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൪֎ฤ
＿人人人人人人人＿
＞ 突然のSEGV ＜
‾Y^Y^Y^Y^Y^Y^Y^‾
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൪֎ฤ
➤ SEGVͰམͪͨɾɾɾ༷?
$ awk --version
GNU Awk 4.1.3, API: 1.1 (GNU MPFR 3.1.4, GNU MP 6.1.0)
<ҎԼུ>
$ echo ಥવͷSEGV | awk '{print $0~/[\x00-\x7F]/}'
1
$ echo ಥવͷSEGV | awk '{print $0~/[\x00-\x80]/}'
awk: ίϚϯυϥΠϯ:1: க໋తΤϥʔ: ෦Τϥʔ: ηάϝϯςʔγϣϯҧ
Aborted (core dumped)
$
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2. SLίϚϯυ
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LSͷ͋Δ͋Δ
➤ lsͱೖΕΑ͏ͱͯ͠
$ sl -l
sl: command not found
$
➤ lʮ͔ͯ͠͠ʯ
sʮΘͨͨͪ͠ʯ
ҎԼུ
➤ lsͱؒҧ͑ͯslͬͯೖΕͪΌͬͨʂͱ͍͏͋Δ͋Δ͔Βɺslͱ͍͏δϣʔΫίϚϯ
υ͕ੜͨ͠
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SLίϚϯυͷ͍ྺ࢙
➤ 1987ɺUNIXχϡʔεάϧʔϓfj.sourceʹॳొ(࡞ऀՎਖ਼͞Μ)
➤ 1993ɺ๛ాਖ਼࢙͞Μ(ݱࡏɺ।ڭत)͕slίϚϯυΛϦϦʔε
ͨͩͷδϣʔΫίϚϯυ͔ΒΩʔλΠϓڲਖ਼ίϚϯυʹਐԽ
➤ 1990ޙʙ LinuxσΟετϦϏϡʔγϣϯʹࡌ͞ΕΔΑ͏ʹͳΔ
➤ 2000ɺslͷվ൛͕ొ
➤ དྷͰ30प!
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SLίϚϯυͷಛ
➤ Ctrl+C (SIGINT) Λԡͯ͠தஅ͠ͳ͍
ΩʔλΠϓڲਖ਼͕త͔ͩΒ
➤ lsΑΓ࣮ߦ͕࣌ؒΔ͔ʹ͍
ΩʔλΠϓڲਖ਼͕త͔ͩΒ
➤ Φϓγϣϯ͕lsʹࣅ͍ͯΔ
Ωʔt δϣʔΫίϚϯυ͔ͩΒ
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SLίϚϯυΛγΣϧܳͰ
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݅
➤ ݩωλͷΞεΩʔΞʔτΛϕʔεͱ͢Δ
o
o
o ____
-- |OO|
_||__| |
| |
/-O=O O=O--
➤ ंྠճΒͳ͍
➤ ৠؾݻఆ͔ͭग़ͬͺͳ͠
➤ ӈ͔Βࠨಈ͕͘ɺؿंશମৗʹදࣔͤ͞Δ
➤ Ctrl+C༗ޮ (ΩʔλΠϓڲਖ਼͕తͰͳ͍͔Β)
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γΣϧܳखॱ̍
AAΛ1ߦʹ
$ echo -e " o \n o \n o ____\n -- |OO|\n
_||__| |\n | |\n/-O=O O=O--"
o
o
o ____
-- |OO|
_||__| |
| |
/-O=O O=O--
$
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γΣϧܳखॱ̎
ӈ٧Ί͢Δ
ڥʹԠͯ͡ tput colsɺBSDܥͳΒ tput coɺBashͳΒecho $COLUMNS Ͱͷ෯͕
औಘͰ͖Δ
$ echo $COLUMNS
120
awkͷ-vΦϓγϣϯͰγΣϧมΛ͠ɺεΫϦϓτͷprintfͰӈ٧Ίͤ͞Δ
$ echo -e " o \n o \n o ____\n -- |OO|\n
_||__| |\n | |\n/-O=O O=O--" | awk -v col=$COLUMNS
'{printf("%" col "s\n", $0)}'
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γΣϧܳखॱ̏
ӈ٧Ίͷ෯ΛݮΒ͍͖ͯ͠ɺ
for ; do ; doneΛ༻͢Δ
$ for ((i=$COLUMNS; i>=11; i--)); do clear; echo -e " o
\n o \n o ____\n -- |OO|\n _||__| |\n |
|\n/-O=O O=O--" | awk -v col=$i '{printf("%" col "s\n", $0)}';
sleep 0.06; done
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͞ΒͳΔվྑͷಓ
➤ ͍͖ͳΓݱΕ͍͖ͯͳΓࢭ·ΔͷͰɺྻंࣄނͷΑ͏ʹݟ͑Δ
˞ݩωλΓڈΔ
➤ ʹΑͬͯͪΒͭ͘͜ͱ͕͋Δ
➤ Ctrl-CΛແޮʹ͢ΔʹͲ͏ͨ͠Β͍͍?
➤ etc.
➤ ͬͱ͍͍ํ๏͋ΔͣͳͷͰɺՋͳͱ͖ʹνϟϨϯδ͠·͠ΐ͏(2ճ)
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SLίϚϯυ൪֎ฤ(1)
lsʹࣅͨΦϓγϣϯଘࡏ͢Δ
➤ $ sl -a
HELP!
➤ $ sl -F
ඈΜͩʂ
➤ $ sl -l
ͪͬ͞ʂ
➤ $ sl -c
C51ͩʂ(Α͘Βͳ͍)
➤ $ sl -aFlc
શ෦ͤʂ
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SLίϚϯυ൪֎ฤ(2)
➤ slίϚϯυͷιʔείʔυgithubʹɻϓϧϦΫͰ͞ΒʹਐԽ
➤ վ൛ͬͱ͍͢͝
ʮSL վܭըʯhttp://www.izumix.xyz/sl/
ʢύονద༻ࡁʣhttp://qiita.com/gm_kou/items/2840a6670dc2e733d00a
٬ं૿ͨ͠Γɺ౿ग़͖ͯͨΓɺSL͕ԟ෮ͨ͠Γɺ͕όϥόϥͩͬͨΓ͍Ζ͍Ζ
δϣʔΫίϚϯυͷྖҬΛ͑ͨ࡞
➤ GistʹژٸԽύον͕͋Δ
https://gist.github.com/poochin/1423262
# SL͡Όͳ͍͡ΌΜʂͱ͍͏ͳಥࠐΈ͝ԕྀ͍ͩ͘͞
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3.λʔϛφϧը໘Λ
͙ͪΌ͙ͪΌʹ
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λʔϛφϧը໘Λ͙ͪΌ͙ͪΌʹ
➤ ANSIΤεέʔϓγʔέϯεΛ͏͜ͱͰɺจࣈʹ৭Λ͚ͭͨΓɺഎܠ৭Λม͑ͨΓ
͕Ͱ͖Δ
➤ ͜ΕΛར༻ͯ͠ɺը໘Λ͙ͪΌ͙ͪΌʹ͢Δ͜ͱ͕Մೳ
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എܠ৭Λม͑ΔANSIΤεέʔϓγʔέϯε
➤ എܠ৭Λม͑ΔΤεέʔϓγʔέϯε(جຊ8৭)
ESC[ʻ40ʙ47ʼm
40: ࠇ, 41: , 42: , 43: ԫ, 44: ੨, 45: Ϛθϯλ, 46: γΞϯ, 47: ന
※ʹΑΓ৭ඍົʹҟͳΔ
➤ എܠ৭Λม͑ΔΤεέʔϓγʔέϯε(256৭)
ESC[48;5;ʻ৭൪߸ʼm
48: ֦ுഎܠ৭; 5: 256৭ΠϯσοΫεΧϥʔ; ৭൪߸: 0ʙ255Λࢦఆ
➤ ΤεέʔϓγʔέϯεͷϦηοτίʔυ (͜Ε͕ͳ͍ͱ৭͕Ϧηοτ͞Εͳ͍)
ESC[0m
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➤ echoίϚϯυͰ"\e"Λ͏
※"\e"Λೝࣝ͠ͳ͍ڥ͋Δ
➤ printfίϚϯυͰ"\033"Λ͏
$ printf "\033[45m%s\033[0m\n" Ϛθϯλ
ANSIΤεέʔϓγʔέϯε͖Ͱදࣔ
Ϛθϯλ
$ echo -e “\e[46mγΞϯ\e[0m]
γΞϯ
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λʔϛφϧը໘͙ͪΌ͙ͪΌɹ˞
$ clear; while :; do c=`expr $RANDOM % 256`; echo -en "\e[48;5;$
{c}m \e[0m"; done
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λʔϛφϧը໘͙ͪΌ͙ͪΌɹվྑ൛
➤ echo
➤ printf
※ൈ͚Δʹsleep 500Λফ͔͢Ctrl+CͰ
$ clear; for color in `od -vAn -tu1 -N $(($COLUMNS*$LINES))
< /dev/urandom` ; do echo -en "\e[48;5;${color}m \e[0m";
done; sleep 500
$ clear; for color in `od -vAn -tu1 -N $(($COLUMNS*$LINES))
< /dev/urandom` ; do printf "\033[48;5;${color}m \033[0m";
done; sleep 500
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ղઆ
1. 0ʙ255·ͰͷཚΛऔಘ
odͱ/dev/urandomΛ༻͢Δ
$ od -vAn -tu1 -N 1 < /dev/urandom
15
2. ͷը໘͍ͬͺ͍ʹͳΔΑ͏ʹɺܻ * ߦճ͚ͩཚΛऔಘ͢Δ
$ od -vAn -tu1 -N $(($COLUMNS*$LINES)) < /dev/urandom
241 178 43 211 3 255 29 178 181 247 234 112 157 18 152 29
3. ΤεέʔϓγʔέϯεͰ৭Λม͑ͤ͞Δ
$ echo -en “\e[48;5;${color}m \e[0m”
$ printf “\033[48;5;${color}m \033[0m”
4. 2.ͰٻΊͨ݁ՌΛforͰճͤ
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·ͱΊ
➤ ಥવͷࢮδΣωϨʔλʔͱslίϚϯυͳͲΛϫϯϥΠφʔͰ࣮ݱ
➤ awkͷ൚༻ੑΕͳ͍
➤ δϣʔΫίϚϯυΛγΣϧܳͰ࣮ݱͤ͞Δͷָ͍͠
➤ ͬͱ͍͍ํ๏͋ΔͣͳͷͰɺՋͳͱ͖ʹνϟϨϯδ͢ΔͷΑ͍ͱࢥ͍·͢