PLIMIT(1) User Commands PLIMIT(1)

NAME

plimit - get or set the resource limits of running processes

SYNOPSIS

plimit [-km] pid...


plimit {-cdfnstv} soft,hard... pid...

DESCRIPTION

If one or more of the cdfnstv options is specified, plimit sets the
soft (current) limit and/or the hard (maximum) limit of the indicated
resource(s) in the processes identified by the process-ID list, pid.
Otherwise plimit reports the resource limits of the processes
identified by the process-ID list, pid.


Only the owner of a process or the super-user is permitted either to
get or to set the resource limits of a process. Only the super-user
can increase the hard limit.

OPTIONS

The following options are supported:

-k
On output, show file sizes in kilobytes (1024 bytes) rather
than in 512-byte blocks.


-m
On output, show file and memory sizes in megabytes (1024*1024
bytes).


The remainder of the options are used to change specified resource
limits. They each accept an argument of the form:


soft,hard


where soft specifies the soft (current) limit and hard specifies the
hard (maximum) limit. If the hard limit is not specified, the comma
may be omitted. If the soft limit is an empty string, only the hard
limit is set. Each limit is either the literal string unlimited, or a
number, with an optional scaling factor, as follows:

nk
n kilobytes


nm
n megabytes (minutes for CPU time)


nh
n hours (for CPU time only)


mm:ss
minutes and seconds (for CPU time only)


The soft limit cannot exceed the hard limit.

-c soft,hard
Set core file size limits (default unit is 512-byte
blocks).


-d soft,hard
Set data segment (heap) size limits (default unit is
kilobytes).


-f soft,hard
Set file size limits (default unit is 512-byte
blocks).


-n soft,hard
Set file descriptor limits (no default unit).


-s soft,hard
Set stack segment size limits (default unit is
kilobytes).


-t soft,hard
Set CPU time limits (default unit is seconds).


-v soft,hard
Set virtual memory size limits (default unit is
kilobytes).

OPERANDS

The following operands are supported.

pid
Process ID list.

EXIT STATUS

plimit returns the exit value zero on success, non-zero on failure
(such as no such process, permission denied, or invalid option).

FILES

/proc/pid/*
process information and control files

SEE ALSO

ulimit(1), proc(1), getrlimit(2), setrlimit(2), proc(5),
attributes(7),

June 8, 1998 PLIMIT(1)