*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config UNIQ
+//config: bool "uniq (4.8 kb)"
+//config: default y
+//config: help
+//config: uniq is used to remove duplicate lines from a sorted file.
+
+//applet:IF_UNIQ(APPLET(uniq, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_UNIQ) += uniq.o
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
//usage: "\n -c Prefix lines by the number of occurrences"
//usage: "\n -d Only print duplicate lines"
//usage: "\n -u Only print unique lines"
+//usage: "\n -i Ignore case"
//usage: "\n -f N Skip first N fields"
//usage: "\n -s N Skip first N chars (after any skipped fields)"
//usage: "\n -w N Compare N characters in line"
OPT_f = 0x8,
OPT_s = 0x10,
OPT_w = 0x20,
+ OPT_i = 0x40,
};
skip_fields = skip_chars = 0;
max_chars = INT_MAX;
- opt_complementary = "f+:s+:w+";
- opt = getopt32(argv, "cduf:s:w:", &skip_fields, &skip_chars, &max_chars);
+ opt = getopt32(argv, "cduf:+s:+w:+i", &skip_fields, &skip_chars, &max_chars);
argv += optind;
input_filename = argv[0];
++cur_compare;
}
- if (!old_line || strncmp(old_compare, cur_compare, max_chars)) {
+ if (!old_line)
+ break;
+ if ((opt & OPT_i)
+ ? strncasecmp(old_compare, cur_compare, max_chars)
+ : strncmp(old_compare, cur_compare, max_chars)
+ ) {
break;
}