ulimit(2)                                                         ulimit(2)




 NAME    [Toc]    [Back]
      ulimit - get and set user limits

 SYNOPSIS    [Toc]    [Back]
      #include <ulimit.h>

      long ulimit(int cmd, ...);

    Remarks    [Toc]    [Back]
      The ANSI C ", ..." construct denotes a variable length argument list
      whose optional [or required] members are given in the associated
      comment (/* */).

 DESCRIPTION    [Toc]    [Back]
      ulimit() provides for control over process limits.  Available values
      for cmd are:

           UL_GETFSIZE         Get the file size limit of the process.  The
                               limit is in units of 512-byte blocks and is
                               inherited by child processes.  Files of any
                               size can be read.  The optional second
                               argument is not used.

           UL_SETFSIZE         Set the file size limit of the process to the
                               value of the optional second argument which
                               is taken as a long.  Any process can decrease
                               this limit, but only a process with an
                               effective user ID of super-user can increase
                               the limit.  Note that the limit must be
                               specified in units of 512-byte blocks.

           UL_GETMAXBRK        Get the maximum possible break value (see
                               brk(2)).  Depending on system resources such
                               as swap space, this maximum might not be
                               attainable at a given time.  The optional
                               second argument is not used.

 ERRORS    [Toc]    [Back]
      ulimit() fails if one or more of the following conditions is true.

           [EINVAL]       cmd is not in the correct range.

           [EPERM]        ulimit() fails and the limit is unchanged if a
                          process with an effective user ID other than
                          super-user attempts to increase its file size
                          limit.

 RETURN VALUE    [Toc]    [Back]
      Upon successful completion, a non-negative value is returned.  Errors
      return a -1, with errno set to indicate the error.




 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003






 ulimit(2)                                                         ulimit(2)




 SEE ALSO    [Toc]    [Back]
      brk(2), write(2).

 STANDARDS CONFORMANCE    [Toc]    [Back]
      ulimit(): AES, SVID2, SVID3, XPG2, XPG3, XPG4


 Hewlett-Packard Company            - 2 -   HP-UX 11i Version 2: August 2003