ホスティングにおける fuse の利用

Transcript

1. ϨΨγʔγεςϜΛࢧ͑Δٕज़ ݪޱफޛ
   
   (.0
   1FQBCP
   *OD
   
   )PTUJOH
   $BTVBM
   5BMLT
    ϗεςΟϯάʹ͓͚Δ
   GVTF
   ͷར༻
2. ໨࣍ wϩϦϙοϓʂͷ঺հ
   wγεςϜߏ੒ͷఀ଺
   wGVTFCJOEFY
   ͷ঺հ
3. ΠϯϑϥΤϯδχΞ ݪޱफޛ
   
   !IBSBTPV ϗεςΟϯάࣄۀ෦
   ϗεςΟϯάάϧʔϓ
 ΠϯϑϥνʔϜ
   ೥໨ʢ࠽ʣ IUUQTIBSBTPVKQ
4. ϩϦϙοϓʂͷ͝঺հ
5. ϩϦϙοϓʂͷྺ࢙
   
   Πϯϑϥฤ w஀ੜɻ͘͞Β͞Μͷઐ༻αʔόΛར༻ɻ
 શϩʔϧʢXFC
   NBJM
   ECʣΛ୆ʹࡌͤͨߏ੒ɻ
 ࠷ऴతʹ୆͙Β͍
   w(.0ͷσʔληϯλʔ΁ɻϩʔϧ͝ͱʹઐ༻αʔόΛཱͯΔ ߏ੒ʹมߋɻϦόʔεϓϩΩγͷಋೖ΋͜ͷλΠϛϯά
   w8PSEQSFTT
   ͷେن໛վ͟Μʢݖݶෆඋˍ'PMMPX4ZNMJOLTʣ
   wNPE@QIQ
   ಋೖ
   wϦόʔεϓϩΩγΛ
   BQBDIFˠOHJOY
   ʹɻIUUQ
   ରԠ
   
   wແྉ44-ಋೖʢOHY@NSVCZʣ ೥ ೥ ೥ ೥ ೥
6. ϩϦϙοϓʂͷߏ੒ wߏஙɿDPCCMFS
   
   QVQQFU
   ʹΑΔߏங
   w؂ࢹɿOBHJPT
   
   NPOJU
   ʹΑΔ؂ࢹ
   wߏ੒ɿ
   wΧελϚʔ%#
   ͱ࿈ܞ͢Δ
   QFSM
   Ͱ࡞੒͞Εͨ
   "1*܈
   wϩʔυόϥϯα
   ˠ
   ϦόʔεϓϩΩγ
   ˠ
   8&#αʔό
   ͷ̏ஈߏ੒
   w8&#αʔόɿ
   w"QBDIF
   Λ࢖༻
   wϢʔβ͕
   IUBDDFTT
   Λར༻͍ͯ͠ΔͨΊ
   OHJOY
   ͳͲ΁ͷ৐Γ׵͕͑ ೉͍͠ɻMJUFTQFFEʁ
7. ͜ͷߏ੒ɺ
   ೥ؒ΄ͱΜͲมΘ͍ͬͯͳ͍ʜ
8. มԽ͸େࣄ
9. ͳΊΒ͔ͳγεςϜ
10. ͳΊΒ͔ͳγεςϜͱ͸ ग़యɿIUUQTTQFBLFSEFDLDPNNBUTVNPUP@SOVNCFSIPTDPOOBNFSBLBE
11. ʮαʔόͷഁյͱ࠶ߏஙʯ
12. ͳΊγεͷҰา αʔό্ʹ͔͠ͳ͍σʔλͱ͔
    ͋ͬͨΒɺ·͍ͣΑͶʁ
13. ͳΊγεͷҰา w·ͣ͸ʮ"QBDIF
    ͷ
    WIPTU
    Λ
    %#Խʯ͠Α͏
    w࢒೦ͳ͕Βɺݱঢ়ͷ
    NPE@NSVCZ
    Ͱ͸ແཧ
    w͍Ζ͍Ζ͋Δ
    NPE@WIPTUYYY
    ͱ࢖͑͹ɺ͍͚ͦ͏Ͱ͸͋Δ
    wͰ΋ɺ΄ͱΜͲϝϯς͞Εͯͳ͍͠ɺ͓΋͠ΖΈ͕ͳ͍
14. Ͱɺ࡞Γ·ͨ͠ɻ
    GVTFCJOEFY
    
15. GVTFCJOEFY
    ͷએ఻
16. GVTFCJOEFY
    ͷಛ௃ wϢʔβۭؒͰϑΝΠϧγεςϜΛ࣮૷Մೳͳ
    MJCGVTF
    Λ͔ͭͬͯɺಠࣗ ͷϑΝΠϧγεςϜΛ࡞੒
    w࣮ߦϑΝΠϧΛɺಠࣗϑΝΠϧγεςϜʢGVTFCJOEFYEʣܦ༝Ͱ
    PQFO
    
    SFBE
    ʢྫ͑͹
    DBUʣ͢Δͱɺର৅ͷϑΝΠϧΛ
    FYFDWF
    ͨ͠ ݁Ռ͕ฦΔ # cat /var/lib/bindex/now Thu Mar 21 20:02:01 UTC 2019 # # cat /var/lib/bindex/now Thu Mar 21 20:02:07 UTC 2019
17. GVTFCJOEFY
    ४උ # ls -l /opt/bindex/ /var/lib/bindex/ /opt/bindex/: total 4 -rw-r--r-- 1 root root 18 Mar 21 19:52 now /var/lib/bindex/: total 0 # # bindexd /opt/bindex/ /var/lib/bindex/ # # ls -l /opt/bindex/ /var/lib/bindex/ /opt/bindex/: total 4 -rw-r--r-- 1 root root 18 Mar 21 19:52 now /var/lib/bindex/: total 4 -rw-r--r-- 1 root root 18 Mar 21 19:52 now wCJOE
    NPVOU
    ͷ༷ʹ
 ʮϚ΢ϯτݩʢ/opt/bindexʣʯͱ
 ʮϚ΢ϯτઌʢ/var/lib/bindexʣʯΛ ༻ҙ͠
    CJOEFYE
    Λ࣮ߦ
    wϚ΢ϯτઌʢ/var/lib/bindexʣʹ΋
 Ϛ΢ϯτݩͱಉ͡ϑΝΠϧ͕ݟ͑Δ
18. GVTFCJOEFY
    ࣮ߦྫ # cat /opt/bindex/now #!/bin/bash date # # cat /var/lib/bindex/now #!/bin/bash date wϚ΢ϯτݩʢ/opt/bindexʣʹ͋Δ ϑΝΠϧ͸ɺϚ΢ϯτઌʢ/var/lib/ bindexʣͰ΋ಉ༷͡ʹݟ͑Δ
 wϚ΢ϯτݩʢ/opt/bindexʣͷϑΝΠ ϧ͕ʮ࣮ߦϑΝΠϧʯͩͬͨ৔߹ɺ
 Ϛ΢ϯτઌͰͦͷϑΝΠϧΛ
    PQFO
    
    SFBEʢDBUʣ͢Δͱɺ
 ࣮ߦϑΝΠϧΛ
    FYFDWF
    ͨ݁͠Ռʢඪ ४ग़ྗɾඪ४Τϥʔग़ྗʣ͕ฦΔ # chmod +x /opt/bindex/now # # cat /var/lib/bindex/now Thu Mar 21 20:02:01 UTC 2019 # # cat /var/lib/bindex/now Thu Mar 21 20:02:07 UTC 2019
19. GVTFCJOEFY
    ૝ఆར༻γʔϯ ϛυϧ΢ΣΞʹҙࣝͤ͞ͳ͍ܗͰɺઃఆϑΝΠϧͳͲΛಈతͳ෺ʹ
 มߋͰ͖Δɻ
    wBQBDIF
    ͷઃఆϑΝΠϧ
    wIPTUT
    w44-ূ໌ॻ
    wSTZOEDPOG
    wFUD
20. GVTFCJOEFY
    ࣮૷ PQFO
    TZTUFN
    DBMM int bindex_open(const char *path, struct fuse_file_info *fi) { : if (should_execute(&buf)) { : if ((fd = mkonetimefd()) == -1) { return -errno; } if ((pid = fork()) < 0) { return -errno; } /* child */ if (pid == 0) { dup2(fd, 1); dup2(fd, 2); argv[0] = (char *)real_path; argv[1] = NULL; execve(real_path, argv, environ);  ࣮ߦϑΝΠϧ͔൑ఆ
     ςϯϙϥϦϑΝΠϧΛ࡞ ੒ɻʢ࡞੒ͱಉ࣌ʹ
    VOMJOLʣ
     ࢠϓϩηεΛੜ੒ͯ͠ɺ
     ඪ४ग़ྗɾඪ४Τϥʔग़ ྗΛςϯϙϥϦϑΝΠϧ ʹ޲͚Δ
     ࣮ߦϑΝΠϧΛ࣮ߦͯ͠
     ͋ͱ͸ɺPQFO
    ͨ͠ϓϩη ε͕ɺςϯϙϥϦϑΝΠ ϧͷ
    GE
    ܦ༝Ͱ
    SFBE ʢCJOEFY@SFBEʣ
21. ศརͦ͏Ͱ͢ͶΑʂʁ
22. GVTFCJOEFY
    Ͱ
    ϨΨγʔγεςϜΛ
    ͳΊΒ͔ʹͯ͠ߦ͖·͠ΐ͏ʂ
23. ͱɺ͍͍͍ͨͱ͜ΖͰ͕͢ɺ
24. GVTFCJOEFY
    ͷμϝμϝͳͱ͜Ζ wJOPUJGZ
    ʹରԠ͍ͯ͠ͳ͍ͨΊɺ
 ʮมߋΛݕ஌ͯ͠ϛυϧ΢ΣΞΛ
    SFMPBEʯͷΑ͏ͳ͜ͱ͕
 ɹͰ͖ͳ͍
    wʮผʹ
    DPOTVMUFNQMBUF
    ͰΑ͘ͳ͍ʁʯʮ࠷ѱ
    DSPO
    Ͱ΋͍͍͠ʯ
 ɹˠ
    ͦͷͱ͓Γ
25. ͜ͷͨΊɺ࢖͍ಓ໛ࡧத
    
26. Ҏ্
27. ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ