New applet, seq. No options, just the basics.

coreutils/Config.in

@@ -367,6 +367,12 @@ config CONFIG_RMDIR
 	help
 	  rmdir is used to remove empty directories.
 
+config CONFIG_SEQ
+	bool "seq"
+	default n
+	help
+	  print a sequence of numbers
+
 config CONFIG_SHA1SUM
 	bool "sha1sum"
 	default n

coreutils/Makefile.in

@@ -63,6 +63,7 @@ COREUTILS-$(CONFIG_PWD)     	+= pwd.o
 COREUTILS-$(CONFIG_REALPATH)	+= realpath.o
 COREUTILS-$(CONFIG_RM)      	+= rm.o
 COREUTILS-$(CONFIG_RMDIR)   	+= rmdir.o
+COREUTILS-$(CONFIG_SEQ)     	+= seq.o
 COREUTILS-$(CONFIG_SHA1SUM) 	+= md5_sha1_sum.o
 COREUTILS-$(CONFIG_SLEEP)   	+= sleep.o
 COREUTILS-$(CONFIG_SORT)    	+= sort.o

coreutils/seq.c

@@ -0,0 +1,44 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of version 2 of the GNU General Public License as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "busybox.h"
+
+extern int seq_main(int argc, char **argv)
+{
+	double last;
+	double first = 1;
+	double increment = 1;
+	double i;
+
+	if (argc == 4) {
+		first = atof(argv[1]);
+		increment = atof(argv[2]);
+	}
+	else if (argc == 3) {
+		first = atof(argv[1]);
+	}
+	else if (argc != 2) {
+		bb_show_usage();
+	}
+	last = atof(argv[argc - 1]);
+
+	for (i = first; ((first < last) ? (i <= last): (i >= last));i += increment) {
+		printf("%g\n", i);
+	}
+
+	return(EXIT_SUCCESS);
+}

include/applets.h

@@ -508,6 +508,9 @@
 #ifdef CONFIG_SED
 	APPLET(sed, sed_main, _BB_DIR_BIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_SEQ
+	APPLET(seq, seq_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_SETKEYCODES
 	APPLET(setkeycodes, setkeycodes_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
 #endif
@@ -682,4 +685,3 @@
 };
 
 #endif
-

include/usage.h

@@ -2094,6 +2094,16 @@
 	"$ echo "foo" | sed -e 's/f[a-zA-Z]o/bar/g'\n" \
 	"bar\n"
 
+#define seq_trivial_usage \
+	"[first [increment]] last"
+#define seq_full_usage \
+	"Print numbers from FIRST to LAST, in steps of INCREMENT.\n" \
+	"FIRST, INCREMENT default to 1\n" \
+	"Arguments:\n" \
+	"\tLAST\n" \
+	"\tFIRST\tLAST\n" \
+	"\tFIRST\tINCREMENT\tLAST\n"
+
 #define setkeycodes_trivial_usage \
 	"SCANCODE KEYCODE ..."
 #define setkeycodes_full_usage \