diff -pruN busybox-1.2.1/include/applets.h busybox-1.2.1-readahead/include/applets.h
--- busybox-1.2.1/include/applets.h	2006-07-01 00:42:10.000000000 +0200
+++ busybox-1.2.1-readahead/include/applets.h	2006-08-19 17:08:25.000000000 +0200
@@ -222,6 +222,7 @@ USE_READLINK(APPLET(readlink, _BB_DIR_US
 USE_READPROFILE(APPLET(readprofile, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_REALPATH(APPLET(realpath, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_HALT(APPLET_ODDNAME(reboot, halt, _BB_DIR_SBIN, _BB_SUID_NEVER, reboot))
+USE_READAHEAD(APPLET(readahead, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RENICE(APPLET(renice, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RESET(APPLET(reset, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RM(APPLET(rm, _BB_DIR_BIN, _BB_SUID_NEVER))
diff -pruN busybox-1.2.1/include/usage.h busybox-1.2.1-readahead/include/usage.h
--- busybox-1.2.1/include/usage.h	2006-07-01 00:42:10.000000000 +0200
+++ busybox-1.2.1-readahead/include/usage.h	2006-08-19 17:16:36.000000000 +0200
@@ -2369,6 +2369,12 @@ USE_FEATURE_MDEV_CONFIG( \
 	"\t-s\tSet the system date and time (default)\n" \
 	"\t-p\tPrint the date and time"
 
+#define readahead_trivial_usage \
+	"[FILE]..."
+#define readahead_full_usage \
+	"Preloads FILE(s) in RAM cache so that subsequent reads for those" \
+	"files do not block on disk I/O."
+
 #ifdef CONFIG_FEATURE_READLINK_FOLLOW
 #define USAGE_READLINK_FOLLOW(a) a
 #else
diff -pruN busybox-1.2.1/miscutils/Config.in busybox-1.2.1-readahead/miscutils/Config.in
--- busybox-1.2.1/miscutils/Config.in	2006-07-01 00:42:09.000000000 +0200
+++ busybox-1.2.1-readahead/miscutils/Config.in	2006-08-19 18:09:57.000000000 +0200
@@ -277,6 +277,25 @@ config CONFIG_MT
 	  to advance or rewind a tape past a specified number of archive
 	  files on the tape.
 
+config CONFIG_READAHEAD
+        bool "readahead"
+	default n
+	help
+ 	  Preload the given list of files in RAM cache so that subsequent
+	  reads on these files will not block on disk I/O.
+
+	  This applet just calls the readahead(2) system call on each file.
+
+	  It is mainly useful in system startup scripts to preload files
+	  or executables a little while before they are used.
+	  When used at the right time, in particular when a CPU bound
+	  process is running, it can significantly speed up system startup.
+	  This requires good knowledge of your system.
+
+	  As readahead(2) blocks until each file has been read,
+	  it is best to run this applet in a background job
+	  or through a script running in parallel. 
+
 config CONFIG_RUNLEVEL
         bool "runlevel"
 	default n
diff -pruN busybox-1.2.1/miscutils/conftest.c busybox-1.2.1-readahead/miscutils/conftest.c
--- busybox-1.2.1/miscutils/conftest.c	1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.2.1-readahead/miscutils/conftest.c	2006-08-19 16:48:13.000000000 +0200
@@ -0,0 +1 @@
+int i;
diff -pruN busybox-1.2.1/miscutils/Makefile.in busybox-1.2.1-readahead/miscutils/Makefile.in
--- busybox-1.2.1/miscutils/Makefile.in	2006-07-01 00:42:09.000000000 +0200
+++ busybox-1.2.1-readahead/miscutils/Makefile.in	2006-08-19 16:24:58.000000000 +0200
@@ -24,6 +24,7 @@ MISCUTILS-${CONFIG_LESS}        += less.
 MISCUTILS-$(CONFIG_MAKEDEVS)    += makedevs.o
 MISCUTILS-$(CONFIG_MOUNTPOINT)  += mountpoint.o
 MISCUTILS-$(CONFIG_MT)          += mt.o
+MISCUTILS-$(CONFIG_READAHEAD)	+= readahead.o
 MISCUTILS-$(CONFIG_RUNLEVEL)    += runlevel.o
 MISCUTILS-$(CONFIG_RX)          += rx.o
 MISCUTILS-$(CONFIG_SETSID)      += setsid.o
diff -pruN busybox-1.2.1/miscutils/readahead.c busybox-1.2.1-readahead/miscutils/readahead.c
--- busybox-1.2.1/miscutils/readahead.c	1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.2.1-readahead/miscutils/readahead.c	2006-08-19 18:16:15.000000000 +0200
@@ -0,0 +1,39 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * readahead implementation for busybox
+ *
+ * Preloads the given files in RAM, to reduce access time.
+ * Does this by calling the readahead(2) system call.
+ *
+ * Copyright (C) 2006  Michael Opdenacker <michael@free-electrons.com>
+ *
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
+ */
+
+#include "busybox.h"
+
+int readahead_main(int argc, char **argv)
+{
+	FILE *f;
+	struct stat stat_buf;
+	int retval = EXIT_SUCCESS;
+
+	if (argc == 1)
+		bb_show_usage();
+
+	argv++;
+
+	do {
+		if ((f = bb_wfopen(*argv, "r")) != NULL) {
+			xstat(*argv, &stat_buf);
+			int r = readahead (fileno(f), (off64_t)0, (size_t)stat_buf.st_size);
+			fclose(f);
+			if (r >= 0) {
+				continue;
+			}
+		}
+		retval = EXIT_FAILURE;
+	} while (*++argv);
+
+	return retval;
+}