- rough prototype for split(1). TODO: Still needs some love since it's way too big..

text	   data	    bss	    dec	    hex	filename
    602	      4	      0	    606	    25e	coreutils/split.o

coreutils/Config.in

@@ -536,6 +536,14 @@ config FEATURE_SORT_BIG
 	  The SuSv3 sort standard is available at:
 	  http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
 
+config SPLIT
+	bool "split"
+	default n
+	help
+	  split a file into pieces.
+	  
+	  http://www.opengroup.org/onlinepubs/007904975/utilities/split.html
+
 config STAT
 	bool "stat"
 	default n

coreutils/Kbuild

@@ -60,6 +60,7 @@ lib-$(CONFIG_RMDIR)     += rmdir.o
 lib-$(CONFIG_SEQ)       += seq.o
 lib-$(CONFIG_SHA1SUM)   += md5_sha1_sum.o
 lib-$(CONFIG_SLEEP)     += sleep.o
+lib-$(CONFIG_SPLIT)     += split.o
 lib-$(CONFIG_SORT)      += sort.o
 lib-$(CONFIG_STAT)      += stat.o
 lib-$(CONFIG_STTY)      += stty.o

coreutils/split.c

@@ -0,0 +1,118 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * split - split a file into pieces
+ * Copyright (c) 2007 Bernhard Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+/* BB_AUDIT: not yet SUSV3 compliant; FIXME: add -bN{k,m}
+ * SUSv3 requirements:
+ * http://www.opengroup.org/onlinepubs/009695399/utilities/split.html
+ */
+#include "busybox.h"
+static unsigned suffix_len = 2;
+
+/* Increment the suffix part of the filename.
+ * Returns 0 on success and 1 on error (if we are out of files)
+ */
+static bool next_file(char **old)
+{
+	size_t end = strlen(*old);
+	unsigned i = 1;
+	char *curr;
+
+	do {
+//		if (**(old + end - i) < 'z') {
+		curr = *old + end - i;
+		if (*curr < 'z') {
+			*(*old + end - i) += 1;
+			break;
+		}
+		*(*old +end - i) = 'a';
+		i++;
+	} while (i <= suffix_len);
+	if ((*curr == 'z') && (i == suffix_len))
+		return 1;
+	return 0;
+}
+#define SPLIT_OPT_l (1<<0)
+#define SPLIT_OPT_b (1<<1)
+
+int split_main(int argc, char **argv);
+int split_main(int argc, char **argv)
+{
+	char *pfx;
+	char *count_p = NULL;
+	char *sfx_len = NULL;
+	unsigned cnt = 1000;
+	char *input_file;
+
+//XXX: FIXME	opt_complementary = "+2"; /* at most 2 non-option arguments */
+	getopt32(argc, argv, "l:b:a:", &count_p, &count_p, &sfx_len);
+	argv += optind;
+
+	if (count_p)
+		cnt = xatoi(count_p);
+	if (sfx_len)
+		suffix_len = xatoul(sfx_len);
+
+	if (!*argv)
+		*--argv = (char*) "-";
+	input_file = *argv;
+	if (NAME_MAX < strlen(*argv) + suffix_len)
+		bb_error_msg_and_die("Suffix too long");
+
+	{
+		char *char_p = xzalloc(suffix_len);
+		memset(char_p, 'a', suffix_len);
+		pfx = xasprintf("%s%s", (argc > optind + 1) ? *++argv : "x", char_p);
+		if (ENABLE_FEATURE_CLEAN_UP)
+			free(char_p);
+	}
+//XXX:FIXME: unify those two file-handling schemata below (FILE vs fd) !
+	if (option_mask32 & SPLIT_OPT_b) {
+		char *buf;
+		ssize_t i;
+		ssize_t bytes = 0;
+		int inp = xopen(input_file, O_RDONLY);
+		int flags = O_WRONLY | O_CREAT | O_TRUNC;
+		do {
+			int out = xopen(pfx, flags);
+			buf = xzalloc(cnt);
+			lseek(inp, bytes, SEEK_SET);
+			bytes += i = full_read(inp, buf, cnt);
+			xwrite(out, buf, i);
+			close(out);
+			free(buf);
+			if (next_file(&pfx))
+				flags = O_WRONLY | O_APPEND;
+		} while(i > 0);
+	} else { /* -l */
+		FILE *fp = fopen_or_warn_stdin(input_file);
+		char *buf;
+		do {
+			unsigned i = cnt;
+			int flags = O_WRONLY | O_CREAT | O_TRUNC;
+			int out = xopen(pfx, flags);
+			buf = NULL;
+			while (i--) {
+			    buf = xmalloc_fgets(fp);
+				if (buf == NULL)
+					break;
+				xwrite(out, buf, buf ? strlen(buf) : 0);
+				free(buf);
+			};
+			close(out);
+
+			if (next_file(&pfx))
+				flags = O_WRONLY | O_APPEND;
+		} while (buf);
+		if (ENABLE_FEATURE_CLEAN_UP)
+			fclose_if_not_stdin(fp);
+	}
+
+	if (ENABLE_FEATURE_CLEAN_UP) {
+		free(pfx);
+	}
+	return EXIT_SUCCESS;
+}

include/applets.h

@@ -274,6 +274,7 @@ USE_SHA1SUM(APPLET_ODDNAME(sha1sum, md5_sha1_sum, _BB_DIR_USR_BIN, _BB_SUID_NEVE
 USE_SLEEP(APPLET(sleep, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_SOFTLIMIT(APPLET_ODDNAME(softlimit, chpst, _BB_DIR_USR_BIN, _BB_SUID_NEVER, softlimit))
 USE_SORT(APPLET(sort, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
+USE_SPLIT(APPLET(split, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_START_STOP_DAEMON(APPLET_ODDNAME(start-stop-daemon, start_stop_daemon, _BB_DIR_SBIN, _BB_SUID_NEVER, start_stop_daemon))
 USE_STAT(APPLET(stat, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_STRINGS(APPLET(strings, _BB_DIR_USR_BIN, _BB_SUID_NEVER))

include/usage.h

@@ -2952,6 +2952,12 @@
 	) \
        ""
 
+#define split_trivial_usage \
+	"[OPTION] [INPUT [PREFIX]]"
+#define split_full_usage \
+	"Options:" \
+	"\n	-blah XXX: Fixme: usage.h"
+
 #define start_stop_daemon_trivial_usage \
        "[OPTIONS] [--start|--stop] ... [-- arguments...]"
 #define start_stop_daemon_full_usage \

scripts/defconfig

@@ -193,6 +193,7 @@ CONFIG_SEQ=y
 CONFIG_SHA1SUM=y
 CONFIG_SLEEP=y
 CONFIG_FEATURE_FANCY_SLEEP=y
+CONFIG_SPLIT=y
 CONFIG_SORT=y
 CONFIG_FEATURE_SORT_BIG=y
 CONFIG_STAT=y