42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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/* uio.h */
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#ifndef _SYS_UIO_H
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#define _SYS_UIO_H
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#include <ktypes.h>
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typedef struct iovec {
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void *iov_base;
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size_t iov_len;
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} iovec;
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#ifdef _KERNEL_MODE
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enum uio_rw { UIO_READ, UIO_WRITE };
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/* Segment flag values. */
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enum uio_seg {
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UIO_USERSPACE, /* from user data space */
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UIO_SYSSPACE /* from system space */
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};
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struct uio {
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struct iovec *uio_iov; /* pointer to array of iovecs */
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int uio_iovcnt; /* number of iovecs in array */
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off_t uio_offset; /* offset into file this uio corresponds to */
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size_t uio_resid; /* residual i/o count */
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enum uio_seg uio_segflg; /* see above */
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enum uio_rw uio_rw; /* see above */
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// struct proc *uio_procp; /* process if UIO_USERSPACE */
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};
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int uiomove(char *cp, int n, struct uio *uio);
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#endif
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ssize_t readv(int fd, const struct iovec *vector, size_t count);
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ssize_t readv_pos(int fd, off_t pos, const struct iovec *vec, size_t count);
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ssize_t writev(int fd, const struct iovec *vector, size_t count);
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ssize_t writev_pos(int fd, off_t pos, const struct iovec *vec, size_t count);
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#endif /* _SYS_UIO_H */
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