ulimit(2)                                               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 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 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 superuser
          may increase the limit.

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

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

     The ulimit command will fail and the limit will be unchanged
     if the following is true:

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

SEE ALSO
     brk(2), write(2)


















January 1992                                                    1