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Annotation of 43BSDReno/contrib/emacs-18.55/etc/ulimit.hack, revision 1.1

1.1     ! root        1: #!/bin/sh
        !             2: #
        !             3: # ulimit.hack: Create an intermediate program for use in
        !             4: # between kernel initialization and init startup.
        !             5: # This is needed on a 3b system if the standard CDLIMIT is
        !             6: # so small that the dumped Emacs file cannot be written.
        !             7: # This program causes everyone to get a bigger CDLIMIT value
        !             8: # so that the dumped Emacs can be written out.
        !             9: #
        !            10: # Users of V.3.1 and later should not use this; see etc/MACHINES
        !            11: # and reconfig your kernel's CDLIMIT parameter instead.
        !            12: #
        !            13: # Caveat: Heaven help you if you screw this up.  This puts
        !            14: # a new program in as /etc/init, which then execs the real init.
        !            15: #
        !            16: cat > ulimit.init.c << \EOF
        !            17: main(argc, argv)
        !            18: int argc;
        !            19: char *argv[];
        !            20: {
        !            21:        ulimit(2, 262144L);     /* "2" is the "set" command. */
        !            22:        /* 262,144 allows for 128Mb files to be written. */
        !            23:        /* If that value isn't suitable, roll your own.  */
        !            24:        execv("/etc/real.init", argv);
        !            25: }
        !            26: EOF
        !            27: #
        !            28: # Compile it and put it in place of the usual init program.
        !            29: #
        !            30: cc ulimit.init.c -o ulimit.init
        !            31: mv /etc/init /etc/real.init
        !            32: mv ulimit.init /etc/ulimit.init
        !            33: ln /etc/ulimit.init /etc/init
        !            34: mv ulimit.init.c /etc/ulimit.init.c    # to keep src for this hack nearby.
        !            35: chmod 0754 /etc/init
        !            36: exit 0
        !            37: #
        !            38: # Upon system reboot, all processes will inherit the new large ulimit.

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