posix_getrlimit

(PHP 4, PHP 5, PHP 7, PHP 8)

posix_getrlimit — Return info about system resource limits

说明

posix_getrlimit ( ) : array|false

posix_getrlimit() returns an array of information about the current resource's soft and hard limits.

Each resource has an associated soft and hard limit. The soft limit is the value that the kernel enforces for the corresponding resource. The hard limit acts as a ceiling for the soft limit. An unprivileged process may only set its soft limit to a value from 0 to the hard limit, and irreversibly lower its hard limit.

参数

此函数没有参数。

返回值

Returns an associative array of elements for each limit that is defined. Each limit has a soft and a hard limit.

**List of possible limits returned**
Limit name	Limit description
core	The maximum size of the core file. When 0, not core files are created. When core files are larger than this size, they will be truncated at this size.
totalmem	The maximum size of the memory of the process, in bytes.
virtualmem	The maximum size of the virtual memory for the process, in bytes.
data	The maximum size of the data segment for the process, in bytes.
stack	The maximum size of the process stack, in bytes.
rss	The maximum number of virtual pages resident in RAM
maxproc	The maximum number of processes that can be created for the real user ID of the calling process.
memlock	The maximum number of bytes of memory that may be locked into RAM.
cpu	The amount of time the process is allowed to use the CPU.
filesize	The maximum size of the data segment for the process, in bytes.
openfiles	One more than the maximum number of open file descriptors.

The function returns false on failure.

范例

Example #1 Example use of posix_getrlimit()


<?php

$limits = posix_getrlimit();

print_r($limits);
?>

以上例程的输出类似于：

Array
(
    [soft core] => 0
    [hard core] => unlimited
    [soft data] => unlimited
    [hard data] => unlimited
    [soft stack] => 8388608
    [hard stack] => unlimited
    [soft totalmem] => unlimited
    [hard totalmem] => unlimited
    [soft rss] => unlimited
    [hard rss] => unlimited
    [soft maxproc] => unlimited
    [hard maxproc] => unlimited
    [soft memlock] => unlimited
    [hard memlock] => unlimited
    [soft cpu] => unlimited
    [hard cpu] => unlimited
    [soft filesize] => unlimited
    [hard filesize] => unlimited
    [soft openfiles] => 1024
    [hard openfiles] => 1024
)

参见

man page GETRLIMIT(2)
posix_setrlimit() - Set system resource limits

User Contributed Notes

petert at tebault dot org 29-Aug-2000 12:58


The array returned (on a RH6.2 box) is:


     soft core = 0


     hard core = unlimited


     soft data = unlimited


     hard data = unlimited


     soft stack = 8388608


     hard stack = unlimited


     soft totalmem = unlimited


     hard totalmem = unlimited


     soft rss = unlimited


     hard rss = unlimited


     soft maxproc = 2048


     hard maxproc = 2048


     soft memlock = unlimited


     hard memlock = unlimited


     soft cpu = unlimited


     hard cpu = unlimited


     soft filesize = unlimited


     hard filesize = unlimited


     soft openfiles = 1024


     hard openfiles = 1024