--- /dev/null
+Index: coreutils/Config.in
+===================================================================
+RCS file: /var/cvs/busybox/coreutils/Config.in,v
+retrieving revision 1.24
+diff -u -r1.24 Config.in
+--- a/coreutils/Config.in 15 Mar 2004 08:28:19 -0000 1.24
++++ b/coreutils/Config.in 31 Mar 2004 11:51:17 -0000
+@@ -59,6 +59,21 @@
+ cmp is used to compare two files and returns the result
+ to standard output.
+
++config CONFIG_FEATURE_CMP_SKIP
++ bool " Enable optional arguments SKIP1 and SKIP2"
++ default n
++ depends on CONFIG_CMP
++ help
++ SKIP1 and SKIP2 specify how many bytes to ignore
++ at the start of each file.
++
++config CONFIG_FEATURE_CMP_LIMIT
++ bool " Enable limit of inputs"
++ default n
++ depends on CONFIG_CMP
++ help
++ Enable cmp option (-n).
++
+ config CONFIG_CP
+ bool "cp"
+ default n
+Index: coreutils/cmp.c
+===================================================================
+RCS file: /var/cvs/busybox/coreutils/cmp.c,v
+retrieving revision 1.9
+diff -u -r1.9 cmp.c
+--- a/coreutils/cmp.c 19 Mar 2003 09:11:32 -0000 1.9
++++ b/coreutils/cmp.c 31 Mar 2004 11:51:17 -0000
+@@ -39,6 +39,12 @@
+ #include <unistd.h>
+ #include "busybox.h"
+
++#ifdef CONFIG_FEATURE_CMP_SKIP
++#define MAX_OPTIONAL_ARGS 3
++#else
++#define MAX_OPTIONAL_ARGS 1
++#endif
++
+ static FILE *cmp_xfopen_input(const char *filename)
+ {
+ FILE *fp;
+@@ -58,12 +64,57 @@
+ static const char fmt_l_opt[] = "%.0s%.0s%d %3o %3o\n"; /* nicer gnu format */
+ #endif
+
+-static const char opt_chars[] = "sl";
++#ifdef CONFIG_FEATURE_CMP_LIMIT
++#define OPTCHR_LIMIT "n:"
++#define OPTARG_LIMIT ,&limit_str
++#else
++#define OPTCHR_LIMIT
++#define OPTARG_LIMIT
++#endif
++
++static const char opt_chars[] = "sl" OPTCHR_LIMIT;
+
+ enum {
+ OPT_s = 1,
+- OPT_l = 2
++ OPT_l = 2,
++ OPT_n = 4
++};
++
++#ifdef CONFIG_LFS
++#define SUFFIX_STRUCT suffix_mult64
++#define PARSE_FUNC bb_xgetllarg10_sfx
++#else
++#define SUFFIX_STRUCT suffix_mult
++#define PARSE_FUNC bb_xgetlarg10_sfx
++#endif
++
++#if defined(CONFIG_FEATURE_CMP_SKIP) || defined(CONFIG_FEATURE_CMP_LIMIT)
++static const struct SUFFIX_STRUCT suffixes[] = {
++ { "k", 1UL << 10 },
++ { "M", 1UL << 20 },
++ { "G", 1UL << 30 },
++#ifdef CONFIG_LFS
++ { "T", 1ULL << 40 },
++ { "P", 1ULL << 50 },
++ { "E", 1ULL << 60 },
++#endif
++ { NULL, 0 }
+ };
++#endif
++
++#ifdef CONFIG_FEATURE_CMP_SKIP
++static void skip_input(FILE *fp, off_t skip, const char *filename)
++{
++ if (skip > 0 && fseeko(fp, skip, SEEK_CUR) != 0) {
++ while (skip-- > 0) {
++ if (getc(fp) == EOF) {
++ bb_xferror(fp, filename);
++ break;
++ }
++ }
++ }
++}
++#endif
+
+ int cmp_main(int argc, char **argv)
+ {
+@@ -73,12 +124,26 @@
+ int c1, c2, char_pos, line_pos;
+ int opt_flags;
+ int exit_val = 0;
++#ifdef CONFIG_FEATURE_CMP_SKIP
++ off_t skip1 = 0, skip2 = 0;
++#endif
++#ifdef CONFIG_FEATURE_CMP_LIMIT
++ off_t limit = -1;
++ char *limit_str;
++#endif
+
+ bb_default_error_retval = 2; /* 1 is returned if files are different. */
+
+- opt_flags = bb_getopt_ulflags(argc, argv, opt_chars);
++ opt_flags = bb_getopt_ulflags(argc, argv, opt_chars OPTARG_LIMIT);
+
+- if ((opt_flags == 3) || (((unsigned int)(--argc - optind)) > 1)) {
++#ifdef CONFIG_FEATURE_CMP_LIMIT
++ if (opt_flags & OPT_n) {
++ limit = PARSE_FUNC(limit_str, suffixes);
++ opt_flags &= 3;
++ }
++#endif
++
++ if ((opt_flags == 3) || (((unsigned int)(--argc - optind)) > MAX_OPTIONAL_ARGS)) {
+ bb_show_usage();
+ }
+
+@@ -87,6 +152,13 @@
+ filename2 = "-";
+ if (*++argv) {
+ filename2 = *argv;
++#ifdef CONFIG_FEATURE_CMP_SKIP
++ if (*++argv) {
++ skip1 = PARSE_FUNC(*argv, suffixes);
++ if (*++argv)
++ skip2 = PARSE_FUNC(*argv, suffixes);
++ }
++#endif
+ }
+ fp2 = cmp_xfopen_input(filename2);
+
+@@ -98,6 +170,11 @@
+ return 0;
+ }
+
++#ifdef CONFIG_FEATURE_CMP_SKIP
++ skip_input(fp1, skip1, filename1);
++ skip_input(fp2, skip2, filename2);
++#endif
++
+ fmt = fmt_differ;
+ if (opt_flags == OPT_l) {
+ fmt = fmt_l_opt;
+@@ -106,6 +183,10 @@
+ char_pos = 0;
+ line_pos = 1;
+ do {
++#ifdef CONFIG_FEATURE_CMP_LIMIT
++ if (limit-- == 0)
++ break;
++#endif
+ c1 = getc(fp1);
+ c2 = getc(fp2);
+ ++char_pos;
+Index: include/usage.h
+===================================================================
+RCS file: /var/cvs/busybox/include/usage.h,v
+retrieving revision 1.198
+diff -u -r1.198 usage.h
+--- a/include/usage.h 29 Mar 2004 08:20:08 -0000 1.198
++++ b/include/usage.h 31 Mar 2004 11:51:17 -0000
+@@ -186,14 +186,29 @@
+ #define clear_full_usage \
+ "Clear screen."
+
++#ifdef CONFIG_FEATURE_CMP_SKIP
++#define USAGE_CMP_SKIP(a) a
++#else
++#define USAGE_CMP_SKIP(a)
++#endif
++
++#ifdef CONFIG_FEATURE_CMP_LIMIT
++#define USAGE_CMP_LIMIT(a) a
++#else
++#define USAGE_CMP_LIMIT(a)
++#endif
++
+ #define cmp_trivial_usage \
+- "[OPTION]... FILE1 [FILE2]"
++ "[OPTION]... FILE1 [FILE2" USAGE_CMP_SKIP(" [SKIP1 [SKIP2]]") "]"
+ #define cmp_full_usage \
+- "Compare files.\n\n" \
++ "Compare files.\n" \
++ USAGE_CMP_SKIP("SKIP1 and SKIP2 are the number of bytes to skip in each file.\n") \
++ "\n" \
+ "Options:\n" \
+- "\t-l\tWrite the byte numbers (decimal) and values (octal)\n" \
+- "\t\t for all differing bytes.\n" \
+- "\t-s\tquiet mode - do not print"
++ "\t-l\t\tWrite the byte numbers (decimal) and values (octal)\n" \
++ "\t\t\t for all differing bytes.\n" \
++ USAGE_CMP_LIMIT("\t-n LIMIT\tCompare at most LIMIT bytes.\n") \
++ "\t-s\t\tquiet mode - do not print"
+
+ #define cp_trivial_usage \
+ "[OPTION]... SOURCE DEST"
+Index: include/libbb.h
+===================================================================
+RCS file: /var/cvs/busybox/include/libbb.h,v
+retrieving revision 1.129
+diff -u -r1.129 libbb.h
+--- a/include/libbb.h 15 Mar 2004 08:28:38 -0000 1.129
++++ b/include/libbb.h 31 Mar 2004 11:51:17 -0000
+@@ -217,6 +217,21 @@
+ const struct suffix_mult *suffixes);
+ extern long bb_xgetlarg10_sfx(const char *arg, const struct suffix_mult *suffixes);
+
++struct suffix_mult64 {
++ const char *suffix;
++ unsigned long long mult;
++};
++
++extern unsigned long long bb_xgetullarg_bnd_sfx(const char *arg, int base,
++ unsigned long long lower,
++ unsigned long long upper,
++ const struct suffix_mult64 *suffixes);
++
++extern long long bb_xgetllarg_bnd_sfx(const char *arg, int base,
++ long long lower,
++ long long upper,
++ const struct suffix_mult64 *suffixes);
++extern long long bb_xgetllarg10_sfx(const char *arg, const struct suffix_mult64 *suffixes);
+
+ //#warning pitchable now?
+ extern unsigned long bb_xparse_number(const char *numstr,
+Index: libbb/Makefile.in
+===================================================================
+RCS file: /var/cvs/busybox/libbb/Makefile.in,v
+retrieving revision 1.34
+diff -u -r1.34 Makefile.in
+--- a/libbb/Makefile.in 6 Mar 2004 22:11:45 -0000 1.34
++++ b/libbb/Makefile.in 31 Mar 2004 11:51:17 -0000
+@@ -70,7 +70,8 @@
+
+ LIBBB_MSRC3:=$(LIBBB_DIR)xgetularg.c
+ LIBBB_MOBJ3:=xgetularg_bnd_sfx.o xgetlarg_bnd_sfx.o getlarg10_sfx.o \
+- xgetularg_bnd.o xgetularg10_bnd.o xgetularg10.o
++ xgetularg_bnd.o xgetularg10_bnd.o xgetularg10.o \
++ xgetullarg_bnd_sfx.o xgetllarg_bnd_sfx.o xgetllarg10_sfx.o
+
+ LIBBB_MSRC4:=$(LIBBB_DIR)/safe_strtol.c
+ LIBBB_MOBJ4:=safe_strtoi.o safe_strtod.o safe_strtol.o safe_strtoul.o
+Index: libbb/xgetularg.c
+===================================================================
+RCS file: /var/cvs/busybox/libbb/xgetularg.c,v
+retrieving revision 1.2
+diff -u -r1.2 xgetularg.c
+--- a/libbb/xgetularg.c 15 Mar 2004 08:28:44 -0000 1.2
++++ b/libbb/xgetularg.c 31 Mar 2004 11:51:17 -0000
+@@ -158,3 +158,106 @@
+ return bb_xgetularg10_bnd(arg, 0, ULONG_MAX);
+ }
+ #endif
++
++#ifdef L_xgetullarg_bnd_sfx
++extern
++unsigned long long bb_xgetullarg_bnd_sfx(const char *arg, int base,
++ unsigned long long lower,
++ unsigned long long upper,
++ const struct suffix_mult64 *suffixes)
++{
++ unsigned long long r;
++ int old_errno;
++ char *e;
++
++ assert(arg);
++
++ /* Disallow '-' and any leading whitespace. Speed isn't critical here
++ * since we're parsing commandline args. So make sure we get the
++ * actual isspace function rather than a larger macro implementaion. */
++ if ((*arg == '-') || (isspace)(*arg)) {
++ bb_show_usage();
++ }
++
++ /* Since this is a lib function, we're not allowed to reset errno to 0.
++ * Doing so could break an app that is deferring checking of errno.
++ * So, save the old value so that we can restore it if successful. */
++ old_errno = errno;
++ errno = 0;
++ r = strtoull(arg, &e, base);
++ /* Do the initial validity check. Note: The standards do not
++ * guarantee that errno is set if no digits were found. So we
++ * must test for this explicitly. */
++ if (errno || (arg == e)) { /* error or no digits */
++ bb_show_usage();
++ }
++ errno = old_errno; /* Ok. So restore errno. */
++
++ /* Do optional suffix parsing. Allow 'empty' suffix tables.
++ * Note that we also all nul suffixes with associated multipliers,
++ * to allow for scaling of the arg by some default multiplier. */
++
++ if (suffixes) {
++ while (suffixes->suffix) {
++ if (strcmp(suffixes->suffix, e) == 0) {
++ if (ULONG_LONG_MAX / suffixes->mult < r) { /* Overflow! */
++ bb_show_usage();
++ }
++ ++e;
++ r *= suffixes->mult;
++ break;
++ }
++ ++suffixes;
++ }
++ }
++
++ /* Finally, check for illegal trailing chars and range limits. */
++ /* Note: although we allow leading space (via stroul), trailing space
++ * is an error. It would be easy enough to allow though if desired. */
++ if (*e || (r < lower) || (r > upper)) {
++ bb_show_usage();
++ }
++
++ return r;
++}
++#endif
++
++#ifdef L_xgetllarg_bnd_sfx
++extern
++long long bb_xgetllarg_bnd_sfx(const char *arg, int base,
++ long long lower,
++ long long upper,
++ const struct suffix_mult64 *suffixes)
++{
++ unsigned long long u = LONG_LONG_MAX;
++ long long r;
++ const char *p = arg;
++
++ if ((*p == '-') && (p[1] != '+')) {
++ ++p;
++#if LONG_LONG_MAX == (-(LONG_LONG_MIN + 1))
++ ++u; /* two's complement */
++#endif
++ }
++
++ r = bb_xgetullarg_bnd_sfx(p, base, 0, u, suffixes);
++
++ if (*arg == '-') {
++ r = -r;
++ }
++
++ if ((r < lower) || (r > upper)) {
++ bb_show_usage();
++ }
++
++ return r;
++}
++#endif
++
++#ifdef L_xgetllarg10_sfx
++extern
++long long bb_xgetllarg10_sfx(const char *arg, const struct suffix_mult64 *suffixes)
++{
++ return bb_xgetllarg_bnd_sfx(arg, 10, LONG_LONG_MIN, LONG_LONG_MAX, suffixes);
++}
++#endif
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