mirror of
https://github.com/sheumann/hush.git
synced 2024-05-28 21:41:30 +00:00
237bedd499
In many cases, this aqllows to drop use of opt_complementary. Approximately -400 bytes: function old new delta getopt32 1423 1502 +79 opt_string 17 18 +1 OPT_STR 24 25 +1 uniq_main 416 406 -10 timeout_main 279 269 -10 sulogin_main 270 260 -10 readprofile_main 1825 1815 -10 ps_main 543 533 -10 pidof_main 245 235 -10 pgrep_main 611 601 -10 od_main 2600 2590 -10 mkfs_minix_main 2684 2674 -10 mkfs_ext2_main 2603 2593 -10 microcom_main 712 702 -10 makemime_main 315 305 -10 ionice_main 282 272 -10 inetd_main 2074 2064 -10 ifplugd_main 1144 1134 -10 halt_main 353 343 -10 getopt_main 636 626 -10 fdisk_main 2854 2844 -10 env_main 206 196 -10 dmesg_main 319 309 -10 conspy_main 1214 1204 -10 awk_main 981 971 -10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220) Total: -139 bytes text data bss dec hex filename 919373 906 14060 934339 e41c3 busybox_old 918969 906 14060 933935 e402f busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* uniq implementation for busybox
|
|
*
|
|
* Copyright (C) 2005 Manuel Novoa III <mjn3@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
|
|
/* BB_AUDIT SUSv3 compliant */
|
|
/* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
|
|
|
|
//usage:#define uniq_trivial_usage
|
|
//usage: "[-cdu][-f,s,w N] [INPUT [OUTPUT]]"
|
|
//usage:#define uniq_full_usage "\n\n"
|
|
//usage: "Discard duplicate lines\n"
|
|
//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 -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"
|
|
//usage:
|
|
//usage:#define uniq_example_usage
|
|
//usage: "$ echo -e \"a\\na\\nb\\nc\\nc\\na\" | sort | uniq\n"
|
|
//usage: "a\n"
|
|
//usage: "b\n"
|
|
//usage: "c\n"
|
|
|
|
#include "libbb.h"
|
|
|
|
int uniq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int uniq_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
const char *input_filename;
|
|
unsigned skip_fields, skip_chars, max_chars;
|
|
unsigned opt;
|
|
char *cur_line;
|
|
const char *cur_compare;
|
|
|
|
enum {
|
|
OPT_c = 0x1,
|
|
OPT_d = 0x2, /* print only dups */
|
|
OPT_u = 0x4, /* print only uniq */
|
|
OPT_f = 0x8,
|
|
OPT_s = 0x10,
|
|
OPT_w = 0x20,
|
|
};
|
|
|
|
skip_fields = skip_chars = 0;
|
|
max_chars = INT_MAX;
|
|
|
|
opt = getopt32(argv, "cduf:+s:+w:+", &skip_fields, &skip_chars, &max_chars);
|
|
argv += optind;
|
|
|
|
input_filename = argv[0];
|
|
if (input_filename) {
|
|
const char *output;
|
|
|
|
if (input_filename[0] != '-' || input_filename[1]) {
|
|
close(STDIN_FILENO); /* == 0 */
|
|
xopen(input_filename, O_RDONLY); /* fd will be 0 */
|
|
}
|
|
output = argv[1];
|
|
if (output) {
|
|
if (argv[2])
|
|
bb_show_usage();
|
|
if (output[0] != '-' || output[1]) {
|
|
// Won't work with "uniq - FILE" and closed stdin:
|
|
//close(STDOUT_FILENO);
|
|
//xopen(output, O_WRONLY | O_CREAT | O_TRUNC);
|
|
xmove_fd(xopen(output, O_WRONLY | O_CREAT | O_TRUNC), STDOUT_FILENO);
|
|
}
|
|
}
|
|
}
|
|
|
|
cur_compare = cur_line = NULL; /* prime the pump */
|
|
|
|
do {
|
|
unsigned i;
|
|
unsigned long dups;
|
|
char *old_line;
|
|
const char *old_compare;
|
|
|
|
old_line = cur_line;
|
|
old_compare = cur_compare;
|
|
dups = 0;
|
|
|
|
/* gnu uniq ignores newlines */
|
|
while ((cur_line = xmalloc_fgetline(stdin)) != NULL) {
|
|
cur_compare = cur_line;
|
|
for (i = skip_fields; i; i--) {
|
|
cur_compare = skip_whitespace(cur_compare);
|
|
cur_compare = skip_non_whitespace(cur_compare);
|
|
}
|
|
for (i = skip_chars; *cur_compare && i; i--) {
|
|
++cur_compare;
|
|
}
|
|
|
|
if (!old_line || strncmp(old_compare, cur_compare, max_chars)) {
|
|
break;
|
|
}
|
|
|
|
free(cur_line);
|
|
++dups; /* testing for overflow seems excessive */
|
|
}
|
|
|
|
if (old_line) {
|
|
if (!(opt & (OPT_d << !!dups))) { /* (if dups, opt & OPT_u) */
|
|
if (opt & OPT_c) {
|
|
/* %7lu matches GNU coreutils 6.9 */
|
|
printf("%7lu ", dups + 1);
|
|
}
|
|
puts(old_line);
|
|
}
|
|
free(old_line);
|
|
}
|
|
} while (cur_line);
|
|
|
|
die_if_ferror(stdin, input_filename);
|
|
|
|
fflush_stdout_and_exit(EXIT_SUCCESS);
|
|
}
|