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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. whitequark‏ @whitequark 10 Jan 2018
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      TIL you can get the path to the current executable with getauxval(AT_EXECFN) on Linux, no messing with /proc necessary. It's a separate block of memory filled by the kernel, not argv[0] or anything.

      11 replies 18 retweets 88 likes
    2. This Tweet is unavailable.
    3. whitequark‏ @whitequark 10 Jan 2018
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      Replying to @__vlqc

      AT_EXECFN is an absolute path, which is exactly why it's useful

      1 reply 0 retweets 1 like
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    5. Hector Martin‏ @marcan42 10 Jan 2018
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      Replying to @__vlqc @whitequark

      Keep in mind that on Linux systems it's entirely possible to run a binary from a path that cannot be accessed from the root of the mount tree (any more). Chroot comes to mind. I'm sure there are others.

      1 reply 0 retweets 0 likes
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      Hector Martin‏ @marcan42 10 Jan 2018
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      Replying to @__vlqc @whitequark

      That too, combined with fexecve. I think /proc/self/exe would still work in these cases.

      6:13 AM - 10 Jan 2018
      0 replies 0 retweets 0 likes

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