Perl で作る tiny shell

Transcript

1. 1FSM
   Ͱ࡞Δ
 UJOZ
   TIFMM )PLLBJEPQN
   

2. !DPEFIFY !$PEF)FY w .FSDBSJ
   *OD
   w %FWFMPQJOH
   NJDSPTFSWJDFT
   w 0LJOBXBQN
   w

   *
   MJLF
   1FSM94(P
   w IUUQTDPEFIFYIBUFCMPKQ

3. γΣϧͬͯ஌ͬͯ·͔͢

4. None

5. /P

6. $ pwd


7. $ pwd
 /Users/codehex

8. #BTI
   ;TI
   pTI

9. γΣϧʹ͸
 ༷ʑͳػೳ͕͋Γ·͢

10. ྫ͑͹

11. ύΠϓ

12. $ pwd | cat -n


13. $ pwd | cat -n
 1 /Users/codehex

14. Ξϯυ

15. $ pwd && echo hello


16. $ pwd && echo hello
 /Users/codehex
 hello

17. ͜ΕΒͷ
 ࣮૷Λ஌͍ͬͯ·͔͢ʁ

18. ࠓ೔࿩͢಺༰

19. ࠓ೔࿩͢಺༰ w ࠷௿ݶͷγΣϧͷఆٛ
    w ߏจղੳ
    w ίϚϯυͷ࣮ߦ

20. ࠓ೔࿩͢಺༰ w ࠷௿ݶͷγΣϧͷఆٛ
    w ߏจղੳ
    w ίϚϯυͷ࣮ߦ

21. ࠷௿ݶͷγΣϧͷఆٛ UJOZ
    TIFMM
    ͷಈ࡞Λఆٛ͢Δ

22. lUJOZ
    TIFMMz
    NFBOT
 ΊͬͪΌখ͍͞γΣϧ

23. Ͳ͏͍͏ಈ࡞Λ͢Δ͔

24. Ͳ͏͍͏ಈ࡞Λ͢Δ͔ w ୯ҰίϚϯυͷ࣮ߦ
    
    $ ls
    
    w ύΠϓͷ࣮ߦ
    
    $ ls

    | cat
    w ΞϯυʹΑΔෳ਺࣮ߦ
    
    $ ls && cat
    w αϒγΣϧ΍όοΫάϥϯυ࣮ߦ͸ࠓճؚΊ·ͤΜ

25. ࠓ೔࿩͢಺༰ w ࠷௿ݶͷγΣϧͷఆٛ
    w ߏจղੳ
    w ίϚϯυͷ࣮ߦ

26. ߏจղੳ ެจఆٛͱߏจղੳثͷ࡞੒

27. $ cat | cat -n && ls

28. $ cat | cat -n && ls

29. $ cat | cat -n && ls

30. $ cat | cat -n && ls

31. $ cat | cat -n && ls

32. $ cat | cat -n && ls ࠨ͔Βӈʹղऍ͠·͢

33. ߏจͷఆٛ

34. ӈʹ࿈͍݁ͯ͘͠Α͏ʹ
 ఆٛ෇͚Λߦ͏

35. ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* <ARG> • ARG: [0-9a-zA-Z_-]* <ARG> |

    [0-9a-zA-Z_-]* • SHLL: <PIPE> '&&' <AND> | <PIPE> • PIPE: <CMD> '|' <PIPE> | <CMD> • AND: <SHLL> '&&' <AND> | <SHLL>

36. ߏจղੳثͷ࡞੒

37. ߏจղੳثʹඞཁͳཁૉ

38. ߏจղੳثʹඞཁͳཁૉ w จࣈྻͷεΩϟφʔ
    w ಡΈࠐΈҐஔ΍ಡΈऔͬͨจࣈྻΛอ࣋͢Δ
    w จࣈྻͷϚονϯά
    w εΩϟφʔͰಘͨจࣈྻ͕ߏจఆٛʹϚονͨ͠ ͔Ͳ͏͔൑ผ͢Δ
    

    w Ϛονͨ͠จࣈྻʹҙຯΛ΋ͨͤΔ τʔΫϯԽ
    w ߏจ໦ͷੜ੒

39. 1FSM
    Ͱ͸ʁ

40. ਖ਼نදݱ
    

41. IUUQTQFSMEPDQFSMPSHQFSMPQIUNMD(@BTTFSUJPO@ l"
    VTFGVM
    JEJPN
    GPS
    AlexA
    MJLF
    
 TDBOOFST
    JT
    A/\G…/gcA
    ʜz

42. /\G…/gc

43. /\G…/gc w A/cA
    NPEJpFS
    Ͱ͸ݱࡏϚον͍ͯ͠ΔҐஔΛ
 อ࣋͢Δ͜ͱ͕Ͱ͖Δɻ
    • pos()
    ͰҐஔΛऔΓग़͢͜ͱ͕Մೳ
    • \G
    Ͱલճ
    Am//gA
    ͰϚονͨ͠ҐஔΛอ࣋͢Δ͜ͱ ͕Մೳ

44. εΩϟφʔͱϚονϯάͷ
 ໾ׂΛ΋ͭ͜ͱ͕Ͱ͖Δ ?P? W

45. ͜͜Ͱྑ͍৘ใ

46. ΊͬͪΌࢀߟʹͳΔϖʔδ w IUUQTHJUIVCDPNLBSVQBOFSVSBQ +40/CMPCNBTUFSMJC+40/1BSTFSQN
    w IUUQTHJUIVCDPNLBSVQBOFSVSB50.- 1BSTFSCMPCNBTUFSMJC50.-1BSTFSQN

47. ࣮૷༷ࢠ

48. ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* <ARG> • ARG: [0-9a-zA-Z_-]* <ARG> |

    [0-9a-zA-Z_-]* • SHLL: <PIPE> '&&' <AND> | <PIPE> • PIPE: <CMD> '|' <PIPE> | <CMD> • AND: <SHLL> '&&' <AND> | <SHLL>

49. $.%

50. ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* <ARG> • ARG: [0-9a-zA-Z_-]* <ARG> |

    [0-9a-zA-Z_-]* • SHLL: <PIPE> '&&' <AND> | <PIPE> • PIPE: <CMD> '|' <PIPE> | <CMD> • AND: <SHLL> '&&' <AND> | <SHLL>

51. 4)--

52. ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* <ARG> • ARG: [0-9a-zA-Z_-]* <ARG> |

    [0-9a-zA-Z_-]* • SHLL: <PIPE> '&&' <AND> | <PIPE> • PIPE: <CMD> '|' <PIPE> | <CMD> • AND: <SHLL> '&&' <AND> | <SHLL>

53. 1*1&

54. ߏจఆٛ • CMD: [a-zA-Z_-][0-9a-zA-Z_-]* <ARG> • ARG: [0-9a-zA-Z_-]* <ARG> |

    [0-9a-zA-Z_-]* • SHLL: <PIPE> '&&' <AND> | <PIPE> • PIPE: <CMD> '|' <PIPE> | <CMD> • AND: <SHLL> '&&' <AND> | <SHLL>

55. "/%

56. ໦Λ
    QSJOU
    ༷ͨ͠ࢠ $ cat | cat -n && ls

57. "/% 1*1& DBU DBU MT $ cat | cat -n

    && ls

58. ͪͳΈʹ

59. $ cat | cat -n && ls

60. $ cat | cat -n && ls ࠨ͔Βӈʹղऍ͠·͢

61. ͳͷͰ
 ໦ΛḷΔͱ͖͸

62. "/% 1*1& DBU DBU MT $ cat | cat -n

    && ls ᶃ

63. "/% 1*1& DBU DBU MT $ cat | cat -n

    && ls ᶃ ᶄ ᶅ

64. "/% 1*1& DBU DBU MT $ cat | cat -n

    && ls ᶃ ᶄ ᶅ ᶆ ᶇ

65. ͜ΕΛجʹ
 ࣮ߦ͢ΔػೳΛ࡞੒͠·͢

66. ࠓ೔࿩͢಺༰ w ࠷௿ݶͷγΣϧͷఆٛ
    w ߏจղੳ
    w ίϚϯυͷ࣮ߦ

67. ίϚϯυͷ࣮ߦ ߏจ໦Λجʹ࣮ߦ͢Δ

68. ࣮૷ͷલʹ

69. ඪ४ετϦʔϜʹ͍ͭͯ

70. w 45%*/
    4UBOEBSE
    *OQVU
    ඪ४ೖྗ
    w 45%065
    4UBOEBSE
    0VUQVU
    ඪ४ग़ྗ
    w 45%&33
    

    4UBOEBSE
    &SSPS
    ඪ४Τϥʔग़ྗ ඪ४ετϦʔϜ

71. ͜ΕΒ͸࣮࣭
 ϑΝΠϧͱͯ͠ѻΘΕ·͢

72. ୯ҰίϚϯυͷ
 ετϦʔϜͷϑϩʔ

73. $ cat

74. $ cat cat 45%*/

75. $ cat cat 45%*/ 45%065 45%&33

76. $ cat GPSL
    Λ࢖͏ͱ
    TI
    Λհ͞ͳ͍Ͱ࣮ߦՄೳ

77. ύΠϓͷϑϩʔ

78. $ fortune | cowsay

79. $ fortune | cowsay 45%*/ PS
    /PU ᶃ

80. $ fortune | cowsay 45%*/ PS
    /PU 45%065 ᶃ ᶄ

81. $ fortune | cowsay 45%*/ PS
    /PU 45%065 45%*/ ᶃ ᶄ

    ᶅ

82. $ fortune | cowsay 45%*/ PS
    /PU 45%065 45%*/ 45%065 ᶃ

    ᶄ ᶅ ᶆ

83. ͜ΕΒͷίϚϯυ͸
 ผϓϩηεͰಈ͍͍ͯ·͢

84. $ ps a | cat 1*%

85. ύΠϓͷ࣮૷

86. pipe my ($r, $w);

87. w $r
    ͕
    3FBEFS
    $w
    ͕
    8SJUFS
    w 8SJUFS
    ʹσʔλ͕ॻ͖ࠐ·Εͨͱ͖
 3FBEFS
    ͰͦͷσʔλΛಡΈऔΔ͜ͱ͕Մೳ pipe my ($r, $w);

88. ֤ϓϩηεؒͷετϦʔϜΛ
 pipe()
    Ͱܨ͛Δ͜ͱͰ࣮૷Մೳ

89. ͦͷ࣌ͷϑϩʔ

90. $ fortune | cowsay 45%*/ PS
    /PU 45%065 ᶃ ᶄ

91. $ fortune | cowsay 45%*/ PS
    /PU 45%065 ᶃ ᶄ ᶅ

    ᶆ 8SJUFS 3FBEFS

92. $ fortune | cowsay 45%*/ PS
    /PU 45%065 45%*/ 45%065 ᶃ

    ᶄ ᶅ ᶆ 8SJUFS 3FBEFS ᶇ ᶈ ᶉ

93. ͳͷͰ࣮࣭
 ͜ͷΑ͏ʹߟ͑ΒΕΔ

94. $ fortune | cowsay 45%*/ PS
    /PU 8SJUFS 3FBEFS 45%065 ᶃ

    ᶄ ᶅ ᶆ
95. None

96. w ίϚϯυ
    OPEF
    Ͱ͔ͭ਌
    OPEF
    ͕ύΠϓͰ͸ͳ͍
 ৔߹͸ଈίϚϯυΛ࣮ߦ
    w ͦΕҎ֎͸ίϚϯυΛอ࣋͢Δ
    w ύΠϓ
    OPEF
    ͔ͭ਌͕ύΠϓ
    OPEF
    Ͱ͸ͳ͍৔߹
 อ࣋͠ଓ͚ͨίϚϯυΛ࣮ߦ

97. Ξϯυͷϑϩʔ

98. $ echo hello && echo world

99. $ echo hello && echo world ᶃ

100. $ echo hello && echo world ᶃ ᶄ

101. w Ξϯυ
     OPEF
     ʹདྷΔ·Ͱʹࠨͷ
     OPEF
     Λ
 શ࣮ͯߦ͢Δ
     w ੒ޭͨ͠৔߹ӈͷ
     OPEF
     Λࠨͷ
     OPEF
     ͱಉ͡Α͏ ʹ࣮ߦ͢Δ

102. ͜Ε͚ͩͰ
 UJOZ
     TIFMM
     ͕׬੒͠·͢ʂ

103. ·ͱΊ

104. ·ͱΊ w ӈʹ࿈͍݁ͯ͘͠Α͏ʹߏจఆٛͨ͠
     w γΣϧͷύΠϓɺΞϯυػೳΛཧղͯ͠ɺղੳ࣌ʹ ࣮ߦ͢ΔػೳΛ࡞੒ͨ͠

105. ࣭໰Ͳ͏ͧ https://github.com/Code-Hex/p5-Shell-Tiny