68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
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#include <fcntl.h>
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#include <os/File.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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namespace os
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{
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File::File(Badge<File>)
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{
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}
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File::~File()
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{
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if (m_fd >= 0) close(m_fd);
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}
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Result<SharedPtr<File>> File::construct(StringView path, int flags, mode_t mode)
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{
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auto file = TRY(adopt_shared(new (std::nothrow) File({})));
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long rc = syscall(SYS_open, path.chars(), flags, mode);
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int fd = TRY(Result<int>::from_syscall(rc));
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file->m_fd = fd;
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return file;
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}
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Result<SharedPtr<File>> File::open(StringView path, OpenMode flags)
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{
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return construct(path, (int)flags, 0);
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}
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Result<SharedPtr<File>> File::open_or_create(StringView path, OpenMode flags, mode_t mode)
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{
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return construct(path, (int)flags | O_CREAT, mode);
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}
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Result<SharedPtr<File>> File::create(StringView path, OpenMode flags, mode_t mode)
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{
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return construct(path, (int)flags | (O_CREAT | O_EXCL), mode);
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}
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Result<usize> File::raw_read(u8* buf, usize length)
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{
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long rc = syscall(SYS_read, m_fd, buf, length);
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return Result<usize>::from_syscall(rc);
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}
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Result<usize> File::raw_write(const u8* buf, usize length)
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{
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long rc = syscall(SYS_write, m_fd, buf, length);
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return Result<usize>::from_syscall(rc);
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}
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Result<void> File::write(StringView str)
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{
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TRY(raw_write((const u8*)str.chars(), str.length()));
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return {};
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}
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void File::set_close_on_exec()
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{
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fcntl(m_fd, F_SETFD, FD_CLOEXEC);
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}
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}
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