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need to interpose *at(AT_FDCWD #11

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emaste opened this issue Mar 1, 2019 · 2 comments
Open

need to interpose *at(AT_FDCWD #11

emaste opened this issue Mar 1, 2019 · 2 comments

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@emaste
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emaste commented Mar 1, 2019

Some software calls *at() functions with AT_FDCWD instead of plain functions. Notably, this is true for anything using fts(). fts() calls fstatat() always.

libpreopen must interpose these *at() functions, performing a find_relative() in the AT_FDCWD case.
@emaste
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emaste commented Mar 1, 2019

These:

  • faccessat
  • bindat
  • chflagsat
  • fchmodat
  • fchownat
  • connectat
  • fhlinkat
  • getfhat
  • linkat
  • mkdirat
  • mkfifoat
  • mknodat
  • openat
  • readlinkat
  • renameat
  • fstatat
  • symlinkat
  • unlinkat

@Ericson2314 Ericson2314 mentioned this issue May 3, 2019
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@Ericson2314
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WebAssembly/wasi-libc#42 We've hit this with WASI too.

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@emaste @Ericson2314