ULIMIT(2-SVR4)      RISC/os Reference Manual       ULIMIT(2-SVR4)



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:

     UL_GETFSIZE    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.

     UL_SETFSIZE    Set the regular file size limit of the pro-
                    cess to the value of newlimit; the value of
                    newlimit is interpreted as a long.  Any pro-
                    cess may decrease this limit, but only a pro-
                    cess with an effective user ID of superuser
                    may increase the limit.

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

     UL_GDESLIM     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 superuser 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 {PIPE_MAX}.

DIAGNOSTICS
     Upon successful completion, a non-negative value is
     returned.  Otherwise, a value of -1 is returned and errno is



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ULIMIT(2-SVR4)      RISC/os Reference Manual       ULIMIT(2-SVR4)



     set to indicate the error.






















































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