Summery
各リソースの上限値の表示、設定を行うConstruction
$ ulimit [option]
Option
-a : リソース全ての情報を表示
Sample
# リソースの上限値情報の表示
$ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 63788
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 63788
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
Discription
NAME
ulimit - get and set user limits
SYNOPSIS
#include <ulimit .h>
long ulimit(int cmd, long newlimit);
DESCRIPTION
Warning: This routine is obsolete. Use getrlimit(2), setrlimit(2), and sysconf(3) instead.
For the shell command ulimit(), see bash(1).
The ulimit() call will get or set some limit for the calling process. The cmd argument can
have one of the following values.
UL_GETFSIZE
Return the limit on the size of a file, in units of 512 bytes.
UL_SETFSIZE
Set the limit on the size of a file.
3 (Not implemented for Linux.) Return the maximum possible address of the data segment.
4 (Implemented but no symbolic constant provided.) Return the maximum number of files
that the calling process can open.
RETURN VALUE
On success, ulimit() returns a nonnegative value. On error, -1 is returned, and errno is set
appropriately.
ERRORS
EPERM A unprivileged process tried to increase a limit.
CONFORMING TO
SVr4, POSIX.1-2001. POSIX.1-2008 marks ulimit() as obsolete.
SEE ALSO
bash(1), getrlimit(2), setrlimit(2), sysconf(3)
COLOPHON
This page is part of release 3.65 of the Linux man-pages project. A description of the
project, and information about reporting bugs, can be found at
http://www.kernel.org/doc/man-pages/.
Linux 2008-08-06 ULIMIT(3)
