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1FSMͰ࡞Δ UJOZTIFMM )PLLBJEPQN
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!DPEFIFY !$PEF)FY w .FSDBSJ *OD w %FWFMPQJOHNJDSPTFSWJDFT w 0LJOBXBQN w *MJLF1FSM94(P w IUUQTDPEFIFYIBUFCMPKQ
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γΣϧͬͯͬͯ·͔͢
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/P
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$ pwd
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$ pwd /Users/codehex
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#BTI ;TI pTI
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γΣϧʹ ༷ʑͳػೳ͕͋Γ·͢
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ྫ͑
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ύΠϓ
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$ pwd | cat -n
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$ pwd | cat -n 1 /Users/codehex
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Ξϯυ
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$ pwd && echo hello
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$ pwd && echo hello /Users/codehex hello
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͜ΕΒͷ ࣮Λ͍ͬͯ·͔͢ʁ
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ࠓ͢༰
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ࠓ͢༰ w ࠷ݶͷγΣϧͷఆٛ w ߏจղੳ w ίϚϯυͷ࣮ߦ
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ࠓ͢༰ w ࠷ݶͷγΣϧͷఆٛ w ߏจղੳ w ίϚϯυͷ࣮ߦ
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࠷ݶͷγΣϧͷఆٛ UJOZTIFMMͷಈ࡞Λఆٛ͢Δ
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lUJOZTIFMMzNFBOT ΊͬͪΌখ͍͞γΣϧ
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Ͳ͏͍͏ಈ࡞Λ͢Δ͔
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Ͳ͏͍͏ಈ࡞Λ͢Δ͔ w ୯ҰίϚϯυͷ࣮ߦ $ ls w ύΠϓͷ࣮ߦ $ ls | cat w ΞϯυʹΑΔෳ࣮ߦ $ ls && cat w αϒγΣϧόοΫάϥϯυ࣮ߦࠓճؚΊ·ͤΜ
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ࠓ͢༰ w ࠷ݶͷγΣϧͷఆٛ w ߏจղੳ w ίϚϯυͷ࣮ߦ
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ߏจղੳ ެจఆٛͱߏจղੳثͷ࡞
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$ cat | cat -n && ls
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$ cat | cat -n && ls
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$ cat | cat -n && ls
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$ cat | cat -n && ls
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$ cat | cat -n && ls
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$ cat | cat -n && ls ࠨ͔Βӈʹղऍ͠·͢
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ߏจͷఆٛ
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ӈʹ࿈͍݁ͯ͘͠Α͏ʹ ఆ͚ٛΛߦ͏
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ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* • ARG: [0-9a-zA-Z_-]* | [0-9a-zA-Z_-]* • SHLL: '&&' | • PIPE: '|' | • AND: '&&' |
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ߏจղੳثͷ࡞
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ߏจղੳثʹඞཁͳཁૉ
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ߏจղੳثʹඞཁͳཁૉ w จࣈྻͷεΩϟφʔ w ಡΈࠐΈҐஔಡΈऔͬͨจࣈྻΛอ࣋͢Δ w จࣈྻͷϚονϯά w εΩϟφʔͰಘͨจࣈྻ͕ߏจఆٛʹϚονͨ͠ ͔Ͳ͏͔ผ͢Δ w Ϛονͨ͠จࣈྻʹҙຯΛͨͤΔ τʔΫϯԽ w ߏจͷੜ
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1FSMͰʁ
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ਖ਼نදݱ
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IUUQTQFSMEPDQFSMPSHQFSMPQIUNMD(@BTTFSUJPO@ l"VTFGVMJEJPNGPSAlexAMJLF TDBOOFSTJTA/\G…/gcAʜz
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/\G…/gc
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/\G…/gc w A/cANPEJpFSͰݱࡏϚον͍ͯ͠ΔҐஔΛ อ࣋͢Δ͜ͱ͕Ͱ͖Δɻ • pos()ͰҐஔΛऔΓग़͢͜ͱ͕Մೳ • \GͰલճAm//gAͰϚονͨ͠ҐஔΛอ࣋͢Δ͜ͱ ͕Մೳ
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εΩϟφʔͱϚονϯάͷ ׂΛͭ͜ͱ͕Ͱ͖Δ ?P? W
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͜͜Ͱྑ͍ใ
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ΊͬͪΌࢀߟʹͳΔϖʔδ w IUUQTHJUIVCDPNLBSVQBOFSVSBQ +40/CMPCNBTUFSMJC+40/1BSTFSQN w IUUQTHJUIVCDPNLBSVQBOFSVSB50.- 1BSTFSCMPCNBTUFSMJC50.-1BSTFSQN
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࣮༷ࢠ
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ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* • ARG: [0-9a-zA-Z_-]* | [0-9a-zA-Z_-]* • SHLL: '&&' | • PIPE: '|' | • AND: '&&' |
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$.%
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ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* • ARG: [0-9a-zA-Z_-]* | [0-9a-zA-Z_-]* • SHLL: '&&' | • PIPE: '|' | • AND: '&&' |
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4)--
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ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* • ARG: [0-9a-zA-Z_-]* | [0-9a-zA-Z_-]* • SHLL: '&&' | • PIPE: '|' | • AND: '&&' |
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1*1&
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ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* • ARG: [0-9a-zA-Z_-]* | [0-9a-zA-Z_-]* • SHLL: '&&' | • PIPE: '|' | • AND: '&&' |
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"/%
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ΛQSJOU༷ͨ͠ࢠ $ cat | cat -n && ls
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"/% 1*1& DBU DBU MT $ cat | cat -n && ls
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ͪͳΈʹ
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$ cat | cat -n && ls
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$ cat | cat -n && ls ࠨ͔Βӈʹղऍ͠·͢
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ͳͷͰ ΛḷΔͱ͖
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"/% 1*1& DBU DBU MT $ cat | cat -n && ls ᶃ
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"/% 1*1& DBU DBU MT $ cat | cat -n && ls ᶃ ᶄ ᶅ
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"/% 1*1& DBU DBU MT $ cat | cat -n && ls ᶃ ᶄ ᶅ ᶆ ᶇ
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͜ΕΛجʹ ࣮ߦ͢ΔػೳΛ࡞͠·͢
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ࠓ͢༰ w ࠷ݶͷγΣϧͷఆٛ w ߏจղੳ w ίϚϯυͷ࣮ߦ
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ίϚϯυͷ࣮ߦ ߏจΛجʹ࣮ߦ͢Δ
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࣮ͷલʹ
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ඪ४ετϦʔϜʹ͍ͭͯ
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w 45%*/ 4UBOEBSE*OQVU ඪ४ೖྗ w 45%065 4UBOEBSE0VUQVU ඪ४ग़ྗ w 45%&33 4UBOEBSE&SSPS ඪ४Τϥʔग़ྗ ඪ४ετϦʔϜ
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͜ΕΒ࣮࣭ ϑΝΠϧͱͯ͠ѻΘΕ·͢
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୯ҰίϚϯυͷ ετϦʔϜͷϑϩʔ
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$ cat
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$ cat cat 45%*/
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$ cat cat 45%*/ 45%065 45%&33
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$ cat GPSLΛ͏ͱTIΛհ͞ͳ͍Ͱ࣮ߦՄೳ
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ύΠϓͷϑϩʔ
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$ fortune | cowsay
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$ fortune | cowsay 45%*/ PS/PU ᶃ
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$ fortune | cowsay 45%*/ PS/PU 45%065 ᶃ ᶄ
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$ fortune | cowsay 45%*/ PS/PU 45%065 45%*/ ᶃ ᶄ ᶅ
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$ fortune | cowsay 45%*/ PS/PU 45%065 45%*/ 45%065 ᶃ ᶄ ᶅ ᶆ
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͜ΕΒͷίϚϯυ ผϓϩηεͰಈ͍͍ͯ·͢
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$ ps a | cat 1*%
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ύΠϓͷ࣮
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pipe my ($r, $w);
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w $r͕3FBEFS $w͕8SJUFS w 8SJUFSʹσʔλ͕ॻ͖ࠐ·Εͨͱ͖ 3FBEFSͰͦͷσʔλΛಡΈऔΔ͜ͱ͕Մೳ pipe my ($r, $w);
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֤ϓϩηεؒͷετϦʔϜΛ pipe()Ͱܨ͛Δ͜ͱͰ࣮Մೳ
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ͦͷ࣌ͷϑϩʔ
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$ fortune | cowsay 45%*/ PS/PU 45%065 ᶃ ᶄ
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$ fortune | cowsay 45%*/ PS/PU 45%065 ᶃ ᶄ ᶅ ᶆ 8SJUFS 3FBEFS
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$ fortune | cowsay 45%*/ PS/PU 45%065 45%*/ 45%065 ᶃ ᶄ ᶅ ᶆ 8SJUFS 3FBEFS ᶇ ᶈ ᶉ
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ͳͷͰ࣮࣭ ͜ͷΑ͏ʹߟ͑ΒΕΔ
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$ fortune | cowsay 45%*/ PS/PU 8SJUFS 3FBEFS 45%065 ᶃ ᶄ ᶅ ᶆ
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w ίϚϯυOPEFͰ͔ͭOPEF͕ύΠϓͰͳ͍ ߹ଈίϚϯυΛ࣮ߦ w ͦΕҎ֎ίϚϯυΛอ࣋͢Δ w ύΠϓOPEF͔͕ͭύΠϓOPEFͰͳ͍߹ อ࣋͠ଓ͚ͨίϚϯυΛ࣮ߦ
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Ξϯυͷϑϩʔ
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$ echo hello && echo world
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$ echo hello && echo world ᶃ
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$ echo hello && echo world ᶃ ᶄ
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w ΞϯυOPEFʹདྷΔ·ͰʹࠨͷOPEFΛ શ࣮ͯߦ͢Δ w ޭͨ͠߹ӈͷOPEFΛࠨͷOPEFͱಉ͡Α͏ ʹ࣮ߦ͢Δ
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͜Ε͚ͩͰ UJOZTIFMM͕͠·͢ʂ
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·ͱΊ
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·ͱΊ w ӈʹ࿈͍݁ͯ͘͠Α͏ʹߏจఆٛͨ͠ w γΣϧͷύΠϓɺΞϯυػೳΛཧղͯ͠ɺղੳ࣌ʹ ࣮ߦ͢ΔػೳΛ࡞ͨ͠
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࣭Ͳ͏ͧ https://github.com/Code-Hex/p5-Shell-Tiny