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Kernel: Implement pread syscall

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The OpenFileDescription class already offers the necessary functionlity,
so implementing this was only a matter of following the structure for
`read` while handling the additional `offset` argument.
This commit is contained in:
Rodrigo Tobar 2021-10-12 21:13:28 +08:00 • committed by Andreas Kling
parent 8936b111a7
commit e1093c3403
3 changed files with 23 additions and 0 deletions
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1
Kernel/Process.h
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@ -294,6 +294,7 @@ public:
KResultOr<FlatPtr> sys$open(Userspace<const Syscall::SC_open_params*>);
KResultOr<FlatPtr> sys$close(int fd);
KResultOr<FlatPtr> sys$read(int fd, Userspace<u8*>, size_t);
KResultOr<FlatPtr> sys$pread(int fd, Userspace<u8*>, size_t, off_t);
KResultOr<FlatPtr> sys$readv(int fd, Userspace<const struct iovec*> iov, int iov_count);
KResultOr<FlatPtr> sys$write(int fd, Userspace<const u8*>, size_t);
KResultOr<FlatPtr> sys$writev(int fd, Userspace<const struct iovec*> iov, int iov_count);