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.

devmap_dup(9e)

devmap_dup(9E)                Driver Entry Points               devmap_dup(9E)



NAME
       devmap_dup - device mapping duplication entry point

SYNOPSIS
       #include <sys/ddi.h>
       #include <sys/sunddi.h

        int prefixdevmap_dup(devmap_cookie_t dhp, void *pvtp,
            devmap_cookie_t new_dhp, void **new_pvtp);

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI).

ARGUMENTS
       dhp         An  opaque  mapping handle that the system uses to describe
                   the mapping currently being duplicated.


       pvtp        Driver private mapping data for the mapping currently being
                   duplicated.


       new_dhp     An  opaque  data structure that the system uses to describe
                   the duplicated device mapping.


       new_pvtp    A pointer to be filled in by device drivers with the driver
                   private mapping data for the duplicated device mapping.


DESCRIPTION
       The system calls devmap_dup() when a device mapping is duplicated, such
       as during the execution of the fork(2) system call. The system  expects
       devmap_dup()  to  generate new driver private data for the new mapping,
       and to set new_pvtp to point to it. new_dhp is the handle  of  the  new
       mapped object.


       A  non-zero  return  value from devmap_dup() will cause a corresponding
       operation such as fork() to fail.

RETURN VALUES
       devmap_dup() returns the following values:

       0           Successful completion.


       Non-zero    An error occurred.


EXAMPLES
         static int
         xxdevmap_dup(devmap_cookie_t dhp, void *pvtp, \
             devmap_cookie_t new_dhp,
             void **new_pvtp)
         {
             struct xxpvtdata    *prvtdata;
             struct xxpvtdata    *p = (struct xxpvtdata *)pvtp;
             struct xx_softc     *softc = p->softc;
             mutex_enter(&softc->mutex);
             /* Allocate a new private data structure */
             prvtdata = kmem_alloc(sizeof (struct xxpvtdata), KM_SLEEP);
             /* Return the new data */
             prvtdata->off = p->off;
             prvtdata->len = p->len;
             prvtdata->ctx = p->ctx;
             prvtdata->dhp = new_dhp;
             prvtdata->softc = p->softc;
             *new_pvtp = prvtdata;
             mutex_exit(&softc->mutex);
             return (0);
         }


SEE ALSO
       fork(2), devmap_callback_ctl(9S)


       Writing Device Drivers in Oracle Solaris 11.4



Oracle Solaris 11.4               21 Jan 1997                   devmap_dup(9E)