개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

VOP_READ(9)

VOP_RDWR(9)              BSD Kernel Developer's Manual             VOP_RDWR(9)

NAME
     VOP_READ, VOP_WRITE — read or write a file

SYNOPSIS
     #include <sys/param.h>
     #include <sys/vnode.h>
     #include <sys/uio.h>

     int
     VOP_READ(struct vnode *vp, struct uio *uio, int ioflag,
         struct ucred *cred);

     int
     VOP_WRITE(struct vnode *vp, struct uio *uio, int ioflag,
         struct ucred *cred);

DESCRIPTION
     These entry points read or write the contents of a file

     The arguments are:

     vp      The vnode of the file.

     uio     The location of the data to be read or written.

     ioflag  Various flags.

     cnp     The credentials of the caller.

     The ioflag argument is used to give directives and hints to the file sys‐
     tem.  When attempting a read, the high 16 bits are used to provide a
     read-ahead hint (in units of file system blocks) that the file system
     should attempt.  The low 16 bits are a bit mask which can contain the
     following flags:

     IO_UNIT        Do I/O as atomic unit.

     IO_APPEND      Append write to end.

     IO_SYNC        Do I/O synchronously.

     IO_NODELOCKED  Underlying node already locked.

     IO_NDELAY      FNDELAY flag set in file table.

     IO_VMIO        Data already in VMIO space.

LOCKS
     The file should be locked on entry and will still be locked on exit.

RETURN VALUES
     Zero is returned on success, otherwise an error code is returned.

ERRORS
     [EFBIG]            An attempt was made to write a file that exceeds the
                        process's file size limit or the maximum file size.

     [ENOSPC]           The file system is full.

     [EPERM]            An append-only flag is set on the file, but the caller
                        is attempting to write before the current end of file.

SEE ALSO
     uiomove(9), vnode(9)

AUTHORS
     This manual page was written by Doug Rabson.

BSD                              July 24, 1996                             BSD