svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
door_getparam(3c)
door_getparam(3C) Standard C Library Functions door_getparam(3C)
NAME
door_getparam, door_setparam - retrieve and set door parameters
SYNOPSIS
#include <door.h>
int door_getparam(int d, int param, size_t *out);
int door_setparam(int d, int param, size_t val);
DESCRIPTION
The door_getparam() function retrieves the value of param for the door
descriptor d and writes it through the pointer out. The door_setparam()
function sets the value of param for the door descriptor d to val. The
param argument names the parameter to view or change and can be one of
the following values:
DOOR_PARAM_DATA_MAX
The maximum amount of data that can be passed to the door routine.
Any attempt to call door_call(3C) on a door with a data_size value
larger than the door's DOOR_PARAM_DATA_MAX parameter will fail with
ENOBUFS. At door creation time, this parameter is initialized to
SIZE_MAX and can be set to any value from 0 to SIZE_MAX, inclusive.
This parameter must be greater than or equal to the
DOOR_PARAM_DATA_MIN parameter.
DOOR_PARAM_DATA_MIN
The minimum amount of data that can be passed to the door routine.
Any attempt to call door_call(3C) on a door with a data_size value
smaller than the door's DOOR_PARAM_DATA_MIN parameter will fail
with ENOBUFS. At door creation time, this parameter is initialized
to 0, and can be set to any value from 0 to SIZE_MAX, inclusive.
This parameter must be less than or equal to the
DOOR_PARAM_DATA_MAX parameter.
DOOR_PARAM_DESC_MAX
The maximum number of argument descriptors that can be passed to
the door routine. Any attempt to call door_call(3C) on a door with
a desc_num value larger than the door's DOOR_PARAM_DESC_MAX parame‐
ter will fail with ENFILE. If the door was created with the
DOOR_REFUSE_DESC flag, this parameter is initialized to 0 and can‐
not be changed to any other value. Otherwise, it is initialized to
INT_MAX and can be set to any value from 0 to INT_MAX, inclusive.
The door_setparam() function can only affect doors that were created by
the current process.
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned
and errno is set to indicate the error.
ERRORS
The door_getparam() function will fail if:
EBADF The d argument is not a door descriptor.
EFAULT The out argument is not a valid address.
EINVAL The param argument is not a recognized parameter.
EOVERFLOW The value of the parameter is larger than SIZE_MAX. This
condition can occur only if the calling process is 32-bit
and the door targets a 64-bit process or the kernel.
The door_setparam() function will fail if:
EBADF The d argument is not a door descriptor or has been revoked.
EINVAL The param argument is not a recognized parameter, or the re‐
quested change would make DOOR_PARAM_DATA_MIN greater than
DOOR_PARAM_DATA_MAX.
ENOTSUP The param argument is DOOR_PARAM_DESC_MAX, d was created
with the DOOR_REFUSE_DESC flag, and val is not zero.
EPERM The d argument was not created by this process.
ERANGE The val argument is not in the supported range of param.
EXAMPLES
Example 1 Set up a door with a fixed request size.
typedef struct my_request {
int request;
char buffer[4096];
} my_request_t;
fd = door_create(my_handler, DOOR_REFUSE_DESC);
if (fd < 0)
/* handle error */
if (door_setparam(fd, DOOR_PARAM_DATA_MIN,
sizeof (my_request_t)) < 0 ||
door_setparam(fd, DOOR_PARAM_DATA_MAX,
sizeof (my_request_t)) < 0)
/* handle error */
/*
* the door will only accept door_call(3C)s with a
* data_size which is exactly sizeof (my_request_t).
*/
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe
SEE ALSO
door_call(3C), door_create(3C), door_xcreate(3C), attributes(7)
NOTES
The parameters that can be manipulated by door_setparam() are not the
only limitation on the size of requests. If the door server thread's
stack size is not large enough to hold all of the data requested plus
room for processing the request, the door call will fail with E2BIG.
The DOOR_PARAM_DATA_MIN parameter will not prevent DOOR_UNREF_DATA no‐
tifications from being sent to the door.
HISTORY
The door_getparam() and door_setparam() functions were introduced in
Oracle Solaris 11.0.0.
Definitions for the following param values are available in Solaris
starting with the listed release:
tab() box; cw(4.4i) |cw(1.1i) lw(4.4i) |lw(1.1i) RELEASE _ T{
DOOR_PARAM_DATA_MAX, DOOR_PARAM_DATA_MIN, DOOR_PARAM_DESC_MAX T}11.0.0
Oracle Solaris 11.4 27 Aug 2025 door_getparam(3C)