svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
rfork(2)
Forking, vforking or rforking are the only ways new processes are
created. The argument to selects which resources of the invoking
process (parent) are shared by the new process (child) or ini‐
tialized to their default values. The resources include the open
file descriptor table (which, when shared, permits processes to
open and close files for other processes), and open files. The
argument is the logical OR of some subset of: If set a new
process is created; otherwise changes affect the current process.
If set, the child process will be dissociated from the parent.
Upon exit the child will not leave a status for the parent to
collect. See If set, the invoker's file descriptor table (see is
copied; otherwise the two processes share a single table. If
set, the new process starts with a clean file descriptor table.
Is mutually exclusive with If set, the new process shares file
descriptor to process leaders table with its parent. Only ap‐
plies when neither nor are set. If set, the kernel will force
sharing of the entire address space, typically by sharing the
hardware page table directly. The child will thus inherit and
share all the segments the parent process owns, whether they are
normally shareable or not. The stack segment is not split (both
the parent and child return on the same stack) and thus with the
RFMEM flag may not generally be called directly from high level
languages including C. May be set only with A helper function is
provided to assist with this problem and will cause the new
process to run on the provided stack. See for information. Note
that a lot of code will not run correctly in such an environment.
If set, the kernel will force sharing the sigacts structure be‐
tween the child and the parent. If set, the kernel will deliver
a specified signal to the parent upon the child exit, instead of
default SIGCHLD. The signal number is specified by oring the ex‐
pression into Specifying signal number 0 disables signal delivery
upon the child exit. If set, the kernel will deliver SIGUSR1 in‐
stead of SIGCHLD upon thread exit for the child. This is in‐
tended to mimic certain Linux clone behaviour. File descriptors
in a shared file descriptor table are kept open until either they
are explicitly closed or all processes sharing the table exit.
If is set, the value returned in the parent process is the
process id of the child process; the value returned in the child
is zero. Without the return value is zero. Process id's range
from 1 to the maximum integer value. The system call will sleep,
if necessary, until required process resources are available.
The system call can be implemented as a call to but is not for
backwards compatibility. Upon successful completion, returns a
value of 0 to the child process and returns the process ID of the
child process to the parent process. Otherwise, a value of -1 is
returned to the parent process, no child process is created, and
the global variable is set to indicate the error. The system
call will fail and no child process will be created if: The sys‐
tem-imposed limit on the total number of processes under execu‐
tion would be exceeded. The limit is given by the MIB variable
(The limit is actually ten less than this except for the super
user). The user is not the super user, and the system-imposed
limit on the total number of processes under execution by a sin‐
gle user would be exceeded. The limit is given by the MIB vari‐
able The user is not the super user, and the soft resource limit
corresponding to the argument would be exceeded (see Both the
RFFDG and the RFCFDG flags were specified. Any flags not listed
above were specified. An invalid signal number was specified.
There is insufficient swap space for the new process. The func‐
tion first appeared in Plan9.