1 files changed, 112 insertions, 0 deletions

diff --git a/busybox/coreutils/uniq.c b/busybox/coreutils/uniq.c
new file mode 100644
index 000000000..6caab5dae
--- /dev/null
+++ b/busybox/coreutils/uniq.c
@@ -0,0 +1,112 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * uniq implementation for busybox
+ *
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ * 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
+ *
+ */
+
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include "busybox.h"
+#include "libcoreutils/coreutils.h"
+
+static const char uniq_opts[] = "f:s:cdu\0\7\3\5\1\2\4";
+
+int uniq_main(int argc, char **argv)
+{
+        FILE *in, *out;
+        /* Note: Ignore the warning about dups and e0 being used uninitialized.
+         * They will be initialized on the fist pass of the loop (since s0 is NULL). */
+        unsigned long dups, skip_fields, skip_chars, i;
+        const char *s0, *e0, *s1, *e1, *input_filename;
+        int opt;
+        int uniq_flags = 6;             /* -u */
+
+        skip_fields = skip_chars = 0;
+
+        while ((opt = getopt(argc, argv, uniq_opts)) > 0) {
+                if (opt == 'f') {
+                        skip_fields = bb_xgetularg10(optarg);
+                } else if (opt == 's') {
+                        skip_chars = bb_xgetularg10(optarg);
+                } else if ((s0 = strchr(uniq_opts, opt)) != NULL) {
+                        uniq_flags &= s0[4];
+                        uniq_flags |= s0[7];
+                } else {
+                        bb_show_usage();
+                }
+        }
+
+        input_filename = *(argv += optind);
+
+        in = xgetoptfile_sort_uniq(argv, "r");
+        if (*argv) {
+                ++argv;
+        }
+        out = xgetoptfile_sort_uniq(argv, "w");
+        if (*argv && argv[1]) {
+                bb_show_usage();
+        }
+
+        s0 = NULL;
+
+        /* gnu uniq ignores newlines */
+        while ((s1 = bb_get_chomped_line_from_file(in)) != NULL) {
+                e1 = s1;
+                for (i=skip_fields ; i ; i--) {
+                        e1 = bb_skip_whitespace(e1);
+                        while (*e1 && !isspace(*e1)) {
+                                ++e1;
+                        }
+                }
+                for (i = skip_chars ; *e1 && i ; i--) {
+                        ++e1;
+                }
+                if (s0) {
+                        if (strcmp(e0, e1) == 0) {
+                                ++dups;         /* Note: Testing for overflow seems excessive. */
+                                continue;
+                        }
+                DO_LAST:
+                        if ((dups && (uniq_flags & 2)) || (!dups && (uniq_flags & 4))) {
+                                bb_fprintf(out, "\0%7d\t" + (uniq_flags & 1), dups + 1);
+                                bb_fprintf(out, "%s\n", s0);
+                        }
+                        free((void *)s0);
+                }
+
+                s0 = s1;
+                e0 = e1;
+                dups = 0;
+        }
+
+        if (s0) {
+                e1 = NULL;
+                goto DO_LAST;
+        }
+
+        bb_xferror(in, input_filename);
+
+        bb_fflush_stdout_and_exit(EXIT_SUCCESS);
+}