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-rw-r--r--coreutils/split.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/coreutils/split.c b/coreutils/split.c
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index 0000000..312906f
--- /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;
+}