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PRLIMIT(1)				  User Commands 			       PRLIMIT(1)

NAME
       prlimit - get and set a process resource limits.

SYNOPSIS
       prlimit [options] [--{resource_name}[=limits] [--pid PID]

       prlimit [options] [--{resource_name}[=limits]] command [argument...]

DESCRIPTION
       Given  a process id and one or more resources, prlimit tries to retrieve and/or modify the
       limits.

       When command is given, prlimit will run this command with the given arguments.

       The limits format is composed by a soft and a hard (ceiling) value, separated by  a  semi-
       colon  (:),  in order to modify the existing value(s). If no limits are used, prlimit will
       only display the current values. If one of the values is not used, then the  existing  one
       will  be  used.	To  specify  the  unlimited  or infinity limit (RLIM_INFINITY), the -1 or
       'unlimited' string can be passed.

       Because of the nature of limits, the soft value must be lower or equal to the high  limit.
       To see all the available resource limits, refer to the RESOURCE OPTIONS section.

       <soft>:<hard>  Specify both limits

       <soft>:	      Specify only the soft limit

       :<hard>	      Specify only the hard limit

       <value>	      Specify both soft and hard limits to the same value

GENERAL OPTIONS
       -p, --pid
	      Specify the process id, if none is given, it will use the running process.

       -o, --output list
	      Define  the  output  columns  to use. If no output arrangement is specified, then a
	      default set is used.  Use --help to  get list of all supported columns.

       -V, --version
	      Output version information and exit.

       --verbose
	      Verbose mode.

       --raw  Use the raw output format.

       --noheadings
	      Do not print a header line.

       -h, --help
	      Print a help text and exit.

RESOURCE OPTIONS
       -c, --core[=limits]
	      Maximum size of a core file.

       -d, --data[=limits]
	      Maximum data size.

       -e, --nice[=limits]
	      Maximum nice priority allowed to raise.

       -f, --fsize[=limits]
	      Maximum file size.

       -i, --sigpending[=limits]
	      Maximum number of pending signals.

       -l, --memlock[=limits]
	      Maximum locked-in-memory address space.

       -m, --rss[=limits]
	      Maximum Resident Set Size (RSS).

       -n, --nofile[=limits]
	      Maximum number of open files.

       -q, --msgqueue[=limits]
	      Maximum number of bytes in POSIX message queues.

       -r, --rtprio[=limits]
	      Maximum real-time priority.

       -s, --stack[=limits]
	      Maximum size of the stack.

       -t, --cpu[=limits]
	      CPU time, in seconds.

       -u, --nproc[=limits]
	      Maximum number of processes.

       -v, --as[=limits]
	      Address space limit.

       -x, --locks[=limits]
	      Maximum number of file locks held.

       -y, --rttime[=limits]
	      Timeout for real-time tasks.

EXAMPLES
       prlimit --pid 13134
	      Display limit values for all current resources.

       prlimit --pid 13134 --rss --nofile=1024:4095
	      Display the limits of the RSS and set the soft and hard limits for  the  number  of
	      open files to 1024 and 4095, respectively.

       prlimit --pid 13134 --nproc=512:
	      Modify only the soft limit for the number of processes.

       prlimit --pid $$ --nproc=unlimited
	      Set the number of processes for both soft and ceiling values to unlimited.

       prlimit --cpu=10 sort -u hugefile
	      Set the soft and hard CPU time limit and run 'sort'.

SEE ALSO
       prlimit(2), ulimit(1)

NOTES
       The prlimit system call is supported since Linux 2.6.36, previous kernels will
       break this program.

AUTHORS
       Davidlohr Bueso <dave@gnu.org> - In memory of Dennis M. Ritchie.

AVAILABILITY
       The prlimit command is part of the util-linux package and is available from ftp://ftp.ker-
       nel.org/pub/linux/utils/util-linux/.

util-linux				   October 2011 			       PRLIMIT(1)
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