ULIMIT(2)                            SysV                            ULIMIT(2)



NAME
     ulimit - get and set user limits

SYNOPSIS
     long ulimit (cmd, newlimit)
     int cmd;
     long newlimit;

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

     1    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.

     2    Set the regular file size limit of the process to the value of
          newlimit.  Any process may decrease this limit, but only a process
          with an effective user ID of super-user may increase the limit.
          ulimit fails and the limit is unchanged if a process with an
          effective user ID other than super-user attempts to increase its
          regular file size limit.  [EPERM]

     3    Get the maximum possible break value (see brk(2)).

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

WARNING
     ulimit is effective in limiting the growth of regular files.  Pipes are
     currently limited to 5120 bytes.

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.