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Kernel: Implement FIFOs/named pipes

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This commit is contained in:
Peter Elliott
2020-07-16 15:23:03 -06:00
committed by Andreas Kling
parent 76e34968fa
commit d01eba6fa3
Notes: sideshowbarker 2024-07-19 04:43:02 +09:00 
Author: https://github.com/petelliott
Commit: https://github.com/SerenityOS/serenity/commit/d01eba6fa3e
Pull-request: https://github.com/SerenityOS/serenity/pull/2829
Issue: https://github.com/SerenityOS/serenity/issues/203
Reviewed-by: https://github.com/bugaevc
5 changed files with 69 additions and 0 deletions
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17
Kernel/FileSystem/VirtualFileSystem.cpp
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@@ -292,6 +292,23 @@ KResultOr<NonnullRefPtr<FileDescription>> VFS::open(StringView path, int options
if (auto preopen_fd = inode.preopen_fd())
return *preopen_fd;
if (metadata.is_fifo()) {
if (options & O_WRONLY) {
auto description = inode.fifo().open_direction_blocking(FIFO::Direction::Writer);
description->set_rw_mode(options);
description->set_file_flags(options);
description->set_original_inode({}, inode);
return description;
} else if (options & O_RDONLY) {
auto description = inode.fifo().open_direction_blocking(FIFO::Direction::Reader);
description->set_rw_mode(options);
description->set_file_flags(options);
description->set_original_inode({}, inode);
return description;
}
return KResult(-EINVAL);
}
if (metadata.is_device()) {
if (custody.mount_flags() & MS_NODEV)
return KResult(-EACCES);