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48 lines
1.2 KiB
Odin
48 lines
1.2 KiB
Odin
#+private
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package os
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import "base:runtime"
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import "core:c"
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import "core:sys/posix"
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_posix_absolute_path :: proc(fd: posix.FD, name: string, allocator: runtime.Allocator) -> (path: cstring, err: Error) {
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// NOTE(Feoramund): The situation isn't ideal, but this was the best way I
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// could find to implement this. There are a couple outstanding bug reports
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// regarding the desire to retrieve an absolute path from a handle, but to
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// my knowledge, there hasn't been any work done on it.
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//
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// https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198570
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//
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// This may be unreliable, according to a comment from 2023.
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KInfo_File :: struct {
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structsize: c.int,
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type: c.int,
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fd: c.int,
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ref_count: c.int,
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flags: c.int,
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pad0: c.int,
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offset: i64,
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// NOTE(Feoramund): This field represents a complicated union that I am
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// avoiding implementing for now. I only need the path data below.
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_union: [336]byte,
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path: [posix.PATH_MAX]c.char,
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}
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F_KINFO :: 22
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kinfo: KInfo_File
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kinfo.structsize = size_of(KInfo_File)
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res := posix.fcntl(fd, posix.FCNTL_Cmd(F_KINFO), &kinfo)
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if res == -1 {
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err = _get_platform_error()
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return
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}
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return clone_to_cstring(string(cstring(&kinfo.path[0])), allocator)
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}
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