ulimit(2)                        UNIX System V                        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.








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