node-setrlimit

Fork from ohmu/node-posix to just expose setrlimit

getrlimit(resource)

Get resource limits. (See getrlimit(2).)

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 in the range from 0 up to the hard limit, and (irreversibly) lower its hard limit.

A limit value of null indicates "unlimited" (RLIM_INFINITY).

Supported resources:

'core' (RLIMIT_CORE) Maximum size of core file. When 0 no core dump files are created.

'cpu' (RLIMIT_CPU) CPU time limit in seconds. When the process reaches the soft limit, it is sent a SIGXCPU signal. The default action for this signal is to terminate the process.

'data' (RLIMIT_DATA) The maximum size of the process's data segment (initialized data, uninitialized data, and heap).

'fsize' (RLIMIT_FSIZE) The maximum size of files that the process may create. Attempts to extend a file beyond this limit result in delivery of a SIGXFSZ signal.

'nofile' (RLIMIT_NOFILE) Specifies a value one greater than the maximum file descriptor number that can be opened by this process.

'nproc' (RLIMIT*NPROC) The maximum number of processes (or, more precisely on Linux, threads) that can be created by this process. *(Note: Only Linux, OS X, and BSDs support the 'nproc' resource limit. An error will be raised on unsupported platforms.)_

'stack' (RLIMIT_STACK) The maximum size of the process stack, in bytes. Upon reaching this limit, a SIGSEGV signal is generated.

'as' (RLIMIT_AS) The maximum size of the process's virtual memory (address space) in bytes.

var limits = getrlimit('nofile');
console.log('Current limits: soft=' + limits.soft + ', max=' + limits.hard);

setrlimit(resource, limits)

Set resource limits. (See setrlimit(2).) Supported resource types are listed under getrlimit.

The limits argument is an object in the form { soft: SOFT_LIMIT, hard: HARD_LIMIT }. Current limit values are used if either soft or hard key is not specifing in the limits object. A limit value of null indicates "unlimited" (RLIM_INFINITY).

// raise maximum number of open file descriptors to 10k, hard limit is left unchanged
setrlimit('nofile', { soft: 10000 });

// enable core dumps of unlimited size
setrlimit('core', { soft: null, hard: null });

LICENSE

Copyright (c) 2011-2015 Mika Eloranta

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.