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Explain why POLL_FD_READWRITE is not dangerous at sites of use

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achan1989 2024-10-06 09:47:12 +01:00
parent 1d8844dd56
commit b01a5c6bb7
1 changed files with 4 additions and 0 deletions
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4
lib/std/fs/Dir.zig
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@ -804,6 +804,8 @@ pub fn openFile(self: Dir, sub_path: []const u8, flags: File.OpenFlags) File.Ope
}
if (native_os == .wasi and !builtin.link_libc) {
var base: std.os.wasi.rights_t = .{};
// POLL_FD_READWRITE only grants extra rights if the corresponding FD_READ and/or FD_WRITE
// is also set.
if (flags.isRead()) {
base.FD_READ = true;
base.FD_TELL = true;
@ -984,6 +986,8 @@ pub fn createFile(self: Dir, sub_path: []const u8, flags: File.CreateFlags) File
.FD_FILESTAT_SET_TIMES = true,
.FD_FILESTAT_SET_SIZE = true,
.FD_FILESTAT_GET = true,
// POLL_FD_READWRITE only grants extra rights if the corresponding FD_READ and/or
// FD_WRITE is also set.
.POLL_FD_READWRITE = true,
}, .{}),
};