1.\" Copyright (c) 2002 Kyle Martin. All rights reserved. 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 13.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 16.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22.\" SUCH DAMAGE. 23.\" 24.Dd January 4, 2003 25.Dt ULIMIT 3 26.Os 27.Sh NAME 28.Nm ulimit 29.Nd get and set process limits 30.Sh LIBRARY 31.Lb libc 32.Sh SYNOPSIS 33.In ulimit.h 34.Ft long 35.Fn ulimit "int cmd" "..." 36.Sh DESCRIPTION 37The 38.Fn ulimit 39function will get and set process limits. 40Currently this is limited to the maximum file size. 41The 42.Fa cmd 43argument is one of the following: 44.Bl -tag -width ".Dv UL_GETFSIZE" 45.It Dv UL_GETFSIZE 46will return the maximum file size in units of 512 blocks of 47the current process. 48.It Dv UL_SETFSIZE 49will attempt to set the maximum file size of the current 50process and its children with the second argument expressed as a long. 51.El 52.Sh RETURN VALUES 53Upon successful completion, 54.Fn ulimit 55returns the value requested; 56otherwise the value \-1 is returned and the global variable 57.Va errno 58is set to indicate the error. 59.Sh ERRORS 60The 61.Fn ulimit 62function will fail if: 63.Bl -tag -width Er 64.It Bq Er EINVAL 65The command specified was invalid. 66.It Bq Er EPERM 67The limit specified to 68.Fn ulimit 69would have raised the maximum limit value, 70and the caller is not the super-user. 71.El 72.Sh SEE ALSO 73.Xr getrlimit 2 74.Sh STANDARDS 75The 76.Fn ulimit 77function conforms to 78.St -p1003.1-2001 . 79.Sh HISTORY 80The 81.Fn ulimit 82function first appeared in 83.Fx 5.0 . 84.Sh BUGS 85The 86.Fn ulimit 87function provides limited precision for 88setting and retrieving process limits. 89If there is a need for greater precision than the 90type 91.Vt long 92provides, the 93.Xr getrlimit 2 94and 95.Xr setrlimit 2 96functions should be considered. 97