ulimit(2)                 SYSTEM CALLS                  ulimit(2)



NAME
     ulimit - get and set user limits

SYNOPSIS
     #include <ulimit.h>

     long ulimit(int cmd, ... /* newlimit */ );

DESCRIPTION
     This function provides for control over process limits.  The
     cmd values available are:

     ULGETFSIZE    Get the regular file size limit of  the  pro-
                    cess.   The  limit  is  in  units of 512-byte
                    blocks and is inherited by  child  processes.
                    Files of any size can be read.

     ULSETFSIZE    Set the regular file size limit of  the  pro-
                    cess  to  the  value of newlimit , taken as a
                    long.  Any process may decrease  this  limit,
                    but  only a process with an effective user ID
                    of super-user may increase the limit.

     ULGMEMLIM     Get the maximum  possible  break  value  [see
                    brk(2)].

     ULGDESLIM     Get the current value of the  maximum  number
                    of  open  files per process configured in the
                    system.

     The getrlimit system call provides a more general  interface
     for controlling process limits.

     ulimit fails if the following is true:

     EINVAL         The cmd argument is not valid.

     EPERM          A process with an  effective  user  ID  other
                    than super user attempts to increase its file
                    size limit.

SEE ALSO
     brk(2), getrlimit(2), write(2)

NOTES
     ulimit is effective in limiting the growth of regular files.
     Pipes are currently limited to {PIPEMAX}.

DIAGNOSTICS
     Upon  successful  completion,  a   non-negative   value   is
     returned.  Otherwise, a value of -1 is returned and errno is
     set to indicate the error.



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