mirror of
https://github.com/sheumann/hush.git
synced 2024-11-09 02:09:01 +00:00
104 lines
2.0 KiB
C
104 lines
2.0 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* uniq implementation for busybox
|
|
*
|
|
* Copyright (C) 2005 Manuel Novoa III <mjn3@codepoet.org>
|
|
*
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
/* BB_AUDIT SUSv3 compliant */
|
|
/* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
|
|
|
|
#include "libbb.h"
|
|
|
|
static const char uniq_opts[] = "cdu" "f:s:" "cdu\0\1\2\4";
|
|
|
|
static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)
|
|
{
|
|
const char *n;
|
|
|
|
n = *argv;
|
|
if (n != NULL) {
|
|
if ((*n != '-') || n[1]) {
|
|
return xfopen(n, "r\0w" + read0write2);
|
|
}
|
|
}
|
|
return (read0write2) ? stdout : stdin;
|
|
}
|
|
|
|
int uniq_main(int argc, char **argv);
|
|
int uniq_main(int argc, char **argv)
|
|
{
|
|
FILE *in, *out;
|
|
unsigned long dups, skip_fields, skip_chars, i;
|
|
const char *s0, *e0, *s1, *e1, *input_filename;
|
|
unsigned opt;
|
|
|
|
enum {
|
|
OPT_c = 0x1,
|
|
OPT_d = 0x2,
|
|
OPT_u = 0x4,
|
|
OPT_f = 0x8,
|
|
OPT_s = 0x10,
|
|
};
|
|
|
|
skip_fields = skip_chars = 0;
|
|
|
|
opt = getopt32(argc, argv, "cduf:s:", &s0, &s1);
|
|
if (opt & OPT_f)
|
|
skip_fields = xatoul(s0);
|
|
if (opt & OPT_s)
|
|
skip_chars = xatoul(s1);
|
|
argv += optind;
|
|
|
|
input_filename = *argv;
|
|
|
|
in = xgetoptfile_uniq_s(argv, 0);
|
|
if (*argv) {
|
|
++argv;
|
|
}
|
|
out = xgetoptfile_uniq_s(argv, 2);
|
|
if (*argv && argv[1]) {
|
|
bb_show_usage();
|
|
}
|
|
|
|
s1 = e1 = NULL; /* prime the pump */
|
|
|
|
do {
|
|
s0 = s1;
|
|
e0 = e1;
|
|
dups = 0;
|
|
|
|
/* gnu uniq ignores newlines */
|
|
while ((s1 = xmalloc_getline(in)) != NULL) {
|
|
e1 = s1;
|
|
for (i = skip_fields; i; i--) {
|
|
e1 = skip_whitespace(e1);
|
|
e1 = skip_non_whitespace(e1);
|
|
}
|
|
for (i = skip_chars; *e1 && i; i--) {
|
|
++e1;
|
|
}
|
|
|
|
if (!s0 || strcmp(e0, e1)) {
|
|
break;
|
|
}
|
|
|
|
++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, "%s\n", s0);
|
|
}
|
|
free((void *)s0);
|
|
}
|
|
} while (s1);
|
|
|
|
die_if_ferror(in, input_filename);
|
|
|
|
fflush_stdout_and_exit(EXIT_SUCCESS);
|
|
}
|