ulimit(2)                                                         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 process.  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 process 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.





   8/91                                                                 Page 1