2002-08-08 04:50:36 +00:00
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.\" Copyright (c) 2002 Kyle Martin. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 8, 2002
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.Dt ULIMIT 3
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.Os
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.Sh NAME
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.Nm ulimit
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.Nd get and set process limits
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In ulimit.h
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.Ft long
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.Fn ulimit "int cmd" "..."
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.Sh DESCRIPTION
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The
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.Fn ulimit
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function will get and set process limits.
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Currently this is limited to the maximum file size.
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The
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2002-12-04 15:47:41 +00:00
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.Fa cmd
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2002-12-19 09:40:28 +00:00
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argument is one of the following:
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2002-12-04 15:47:41 +00:00
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.Bl -tag -width ".Dv UL_GETSIZE"
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.It Dv UL_GETSIZE
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will return the maximum file size in units of 512 blocks of
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the current process.
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.It Dv UL_SETSIZE
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will attempt to set the maximum file size of the current
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process and its children with the second argument expressed as a long.
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.El
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.Sh RETURN VALUES
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Upon successful completion,
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.Fn ulimit
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returns the value requested;
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2002-12-04 15:47:41 +00:00
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otherwise the value \-1 is returned and the global variable
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2002-12-18 13:33:04 +00:00
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.Va errno
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2002-08-08 04:50:36 +00:00
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is set to indicate the error.
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.Sh ERRORS
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The
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.Fn ulimit
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The command specified was invalid.
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.It Bq Er EPERM
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The limit specified to
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.Fn ulimit
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would have raised the maximum limit value,
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and the caller is not the super-user.
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.El
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.Sh SEE ALSO
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.Xr getrlimit 2
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.Sh STANDARDS
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The
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.Fn ulimit
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function conforms to
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Fn ulimit
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function first appeared in
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.Fx 5.0 .
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.Sh BUGS
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The
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.Fn ulimit
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function provides limited precision for
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setting and retrieving process limits.
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If there is a need for greater precision than the
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type
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.Vt long
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provides, the
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.Xr getrlimit 2
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and
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.Xr setrlimit 2
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functions should be considered.
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