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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "ULIMIT" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" ulimit 
+.SH NAME
+ulimit \- get and set process limits
+.SH SYNOPSIS
+.LP
+\fB#include <ulimit.h>
+.br
+.sp
+long ulimit(int\fP \fIcmd\fP\fB, ...); \fP
+\fB
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIulimit\fP() function shall control process limits. The process
+limits that can be controlled by this function include
+the maximum size of a single file that can be written (this is equivalent
+to using \fIsetrlimit\fP() with RLIMIT_FSIZE). The \fIcmd\fP values,
+defined in \fI<ulimit.h>\fP, include:
+.TP 7
+UL_GETFSIZE
+Return the file size limit (RLIMIT_FSIZE) of the process. The limit
+shall be in units of 512-byte blocks and shall be inherited
+by child processes. Files of any size can be read. The return value
+shall be the integer part of the soft file size limit divided
+by 512. If the result cannot be represented as a \fBlong\fP, the result
+is unspecified.
+.TP 7
+UL_SETFSIZE
+Set the file size limit for output operations of the process to the
+value of the second argument, taken as a \fBlong\fP,
+multiplied by 512. If the result would overflow an \fBrlim_t\fP, the
+actual value set is unspecified. Any process may decrease its
+own limit, but only a process with appropriate privileges may increase
+the limit. The return value shall be the integer part of the
+new file size limit divided by 512.
+.sp
+.LP
+The \fIulimit\fP() function shall not change the setting of \fIerrno\fP
+if successful.
+.LP
+As all return values are permissible in a successful situation, an
+application wishing to check for error situations should set
+\fIerrno\fP to 0, then call \fIulimit\fP(), and, if it returns -1,
+check to see if \fIerrno\fP is non-zero.
+.SH RETURN VALUE
+.LP
+Upon successful completion, \fIulimit\fP() shall return the value
+of the requested limit. Otherwise, -1 shall be returned and
+\fIerrno\fP set to indicate the error.
+.SH ERRORS
+.LP
+The \fIulimit\fP() function shall fail and the limit shall be unchanged
+if:
+.TP 7
+.B EINVAL
+The \fIcmd\fP argument is not valid.
+.TP 7
+.B EPERM
+A process not having appropriate privileges attempts to increase its
+file size limit.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIgetrlimit\fP() , \fIsetrlimit\fP() , \fIwrite\fP() , the Base Definitions
+volume of IEEE\ Std\ 1003.1-2001, \fI<ulimit.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .