/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
-#include "busybox.h"
-
-static const char uniq_opts[] = "cdu" "f:s:" "cdu\0\1\2\4";
+#include "libbb.h"
static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)
{
return (read0write2) ? stdout : stdin;
}
-int uniq_main(int argc, char **argv);
-int uniq_main(int argc, char **argv)
+int uniq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int uniq_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
FILE *in, *out;
- unsigned long dups, skip_fields, skip_chars, i;
const char *s0, *e0, *s1, *e1, *input_filename;
+ unsigned long dups;
+ unsigned skip_fields, skip_chars, max_chars;
unsigned opt;
+ unsigned i;
enum {
OPT_c = 0x1,
OPT_u = 0x4,
OPT_f = 0x8,
OPT_s = 0x10,
+ OPT_w = 0x20,
};
skip_fields = skip_chars = 0;
+ max_chars = -1;
- opt = getopt32(argc, argv, "cduf:s:", &s0, &s1);
- if (opt & OPT_f)
- skip_fields = xatoul(s0);
- if (opt & OPT_s)
- skip_chars = xatoul(s1);
+ opt_complementary = "f+:s+:w+";
+ opt = getopt32(argv, "cduf:s:w:", &skip_fields, &skip_chars, &max_chars);
argv += optind;
input_filename = *argv;
bb_show_usage();
}
- s1 = e1 = NULL; /* prime the pump */
+ s1 = e1 = NULL; /* prime the pump */
do {
s0 = s1;
dups = 0;
/* gnu uniq ignores newlines */
- while ((s1 = xmalloc_getline(in)) != NULL) {
+ while ((s1 = xmalloc_fgetline(in)) != NULL) {
e1 = s1;
for (i = skip_fields; i; i--) {
e1 = skip_whitespace(e1);
- while (*e1 && !isspace(*e1)) {
- ++e1;
- }
+ e1 = skip_non_whitespace(e1);
}
for (i = skip_chars; *e1 && i; i--) {
++e1;
}
- if (!s0 || strcmp(e0, e1)) {
+ if (!s0 || strncmp(e0, e1, max_chars)) {
break;
}
- ++dups; /* Note: Testing for overflow seems excessive. */
+ ++dups; /* note: testing for overflow seems excessive. */
}
if (s0) {
if (!(opt & (OPT_d << !!dups))) { /* (if dups, opt & OPT_e) */
- fprintf(out, "\0%d " + (opt & 1), dups + 1);
+ fprintf(out, "\0%ld " + (opt & 1), dups + 1); /* 1 == OPT_c */
fprintf(out, "%s\n", s0);
}
free((void *)s0);