support fdopendir + readdir operations #915
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916: new dir module r=asomers a=scottlamb Fixes #915 This is a lower-level interface than `std::fs::ReadDir`. Notable differences: * can be opened from a file descriptor (as returned by `openat`, perhaps before knowing if the path represents a file or directory). Uses `fdopendir` for this, available on all Unix platforms as of rust-lang/libc#1018. * implements `AsRawFd`, so it can be passed to `fstat`, `openat`, etc. * can be iterated through multiple times without closing and reopening the file descriptor. Each iteration rewinds when finished. * returns entries for `.` (current directory) and `..` (parent directory). * returns entries' names as a `CStr` (no allocation or conversion beyond whatever libc does). Co-authored-by: Scott Lamb <slamb@slamb.org>
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916: new dir module r=Susurrus a=scottlamb Fixes #915 This is a lower-level interface than `std::fs::ReadDir`. Notable differences: * can be opened from a file descriptor (as returned by `openat`, perhaps before knowing if the path represents a file or directory). Uses `fdopendir` for this, available on all Unix platforms as of rust-lang/libc#1018. * implements `AsRawFd`, so it can be passed to `fstat`, `openat`, etc. * can be iterated through multiple times without closing and reopening the file descriptor. Each iteration rewinds when finished. * returns entries for `.` (current directory) and `..` (parent directory). * returns entries' names as a `CStr` (no allocation or conversion beyond whatever libc does). Co-authored-by: Scott Lamb <slamb@slamb.org>
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Sep 4, 2018
916: new dir module r=Susurrus a=scottlamb Fixes #915 This is a lower-level interface than `std::fs::ReadDir`. Notable differences: * can be opened from a file descriptor (as returned by `openat`, perhaps before knowing if the path represents a file or directory). Uses `fdopendir` for this, available on all Unix platforms as of rust-lang/libc#1018. * implements `AsRawFd`, so it can be passed to `fstat`, `openat`, etc. * can be iterated through multiple times without closing and reopening the file descriptor. Each iteration rewinds when finished. * returns entries for `.` (current directory) and `..` (parent directory). * returns entries' names as a `CStr` (no allocation or conversion beyond whatever libc does). Co-authored-by: Scott Lamb <slamb@slamb.org>
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I'm writing some static file serving code for a webserver. It opens paths using
openat, determines what type they are (plain file, directory, ...), then tries to serve them. So I want to pass my existing file descriptor tofdopendirrather than pass a path tostd::fs::read_dir.I have a prototype implementation which I'll open a pull request for shortly. This is my first contribution to nix. Apologies if I didn't match style well.
One particular point: I wasn't sure if it'd be better to add a new module or put this into an existing one such as
fcntl. I went with the former for the moment.The text was updated successfully, but these errors were encountered: