- 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


git-svn-id: svn://busybox.net/trunk/busybox@18236 69ca8d6d-28ef-0310-b511-8ec308f3f277

6 files changed, 135 insertions, 0 deletions

diff --git a/coreutils/Config.in b/coreutils/Config.in
index 000f3a8af..baac799db 100644
--- a/coreutils/Config.in
+++ b/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
diff --git a/coreutils/Kbuild b/coreutils/Kbuild
index dfdcbd43c..1c6e6ed23 100644
--- a/coreutils/Kbuild
+++ b/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
diff --git a/coreutils/split.c b/coreutils/split.c
new file mode 100644
index 000000000..312906f6e
--- /dev/null
+++ b/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;
+}
diff --git a/include/applets.h b/include/applets.h
index 3f5bf9bde..77258be42 100644
--- a/include/applets.h
+++ b/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))
diff --git a/include/usage.h b/include/usage.h
index 7adc1fc78..4843f5f67 100644
--- a/include/usage.h
+++ b/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 \
diff --git a/scripts/defconfig b/scripts/defconfig
index c6c200263..6ca10b63d 100644
--- a/scripts/defconfig
+++ b/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