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always open files read if not write

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and if creating a file, open it write.
This commit is contained in:
Pat Hickey
2020-12-16 15:57:08 -08:00
parent af8bdf8933
commit 8777194f0d
1 changed files with 9 additions and 0 deletions
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9
crates/wasi-c2/src/dir.rs
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@@ -210,8 +210,10 @@ impl WasiDir for cap_std::fs::Dir {
if oflags.contains(&(OFlags::CREATE | OFlags::EXCLUSIVE)) { if oflags.contains(&(OFlags::CREATE | OFlags::EXCLUSIVE)) {
opts.create_new(true); opts.create_new(true);
opts.write(true);
} else if oflags.contains(&OFlags::CREATE) { } else if oflags.contains(&OFlags::CREATE) {
opts.create(true); opts.create(true);
opts.write(true);
} }
if oflags.contains(&OFlags::TRUNCATE) { if oflags.contains(&OFlags::TRUNCATE) {
opts.truncate(true); opts.truncate(true);
@@ -223,8 +225,15 @@ impl WasiDir for cap_std::fs::Dir {
{ {
opts.write(true); opts.write(true);
} else { } else {
// If not opened write, open read. This way the OS lets us open the file.
// If FileCaps::READ is not set, read calls will be rejected at the
// get_cap check.
opts.read(true); opts.read(true);
} }
if caps.contains(&FileCaps::READ) {
opts.read(true);
}
if symlink_follow { if symlink_follow {
opts.follow(FollowSymlinks::Yes); opts.follow(FollowSymlinks::Yes);
} }