#

1 files changed, 38 insertions, 0 deletions

diff --git a/etc/ulimit.hack b/etc/ulimit.hack
new file mode 100644
index 00000000000..1baeecc40db
--- /dev/null
+++ b/etc/ulimit.hack
@@ -0,0 +1,38 @@
+#!/bin/sh
+#
+# ulimit.hack: Create an intermediate program for use in
+# between kernel initialization and init startup.
+# This is needed on a 3b system if the standard CDLIMIT is
+# so small that the dumped Emacs file cannot be written.
+# This program causes everyone to get a bigger CDLIMIT value
+# so that the dumped Emacs can be written out.
+#
+# Users of V.3.1 and later should not use this; see etc/MACHINES
+# and reconfig your kernel's CDLIMIT parameter instead.
+#
+# Caveat: Heaven help you if you screw this up.  This puts
+# a new program in as /etc/init, which then execs the real init.
+#
+cat > ulimit.init.c << \EOF
+main(argc, argv)
+int argc;
+char *argv[];
+{
+        ulimit(2, 262144L);     /* "2" is the "set" command. */
+        /* 262,144 allows for 128Mb files to be written. */
+        /* If that value isn't suitable, roll your own.  */
+        execv("/etc/real.init", argv);
+}
+EOF
+#
+# Compile it and put it in place of the usual init program.
+#
+cc ulimit.init.c -o ulimit.init
+mv /etc/init /etc/real.init
+mv ulimit.init /etc/ulimit.init
+ln /etc/ulimit.init /etc/init
+mv ulimit.init.c /etc/ulimit.init.c     # to keep src for this hack nearby.
+chmod 0754 /etc/init
+exit 0
+#
+# Upon system reboot, all processes will inherit the new large ulimit.