mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini sort implementation for busybox
|
|
*
|
|
* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
|
|
*
|
|
* 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 _NOT_ compliant -- a number of options are not supported. */
|
|
/* http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html */
|
|
|
|
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
|
|
*
|
|
* Now does proper error checking on i/o. Plus some space savings.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "busybox.h"
|
|
#include "libcoreutils/coreutils.h"
|
|
|
|
static int compare_ascii(const void *x, const void *y)
|
|
{
|
|
return strcmp(*(char **)x, *(char **)y);
|
|
}
|
|
|
|
static int compare_numeric(const void *x, const void *y)
|
|
{
|
|
int z = atoi(*(char **)x) - atoi(*(char **)y);
|
|
return z ? z : strcmp(*(char **)x, *(char **)y);
|
|
}
|
|
|
|
int sort_main(int argc, char **argv)
|
|
{
|
|
FILE *fp;
|
|
char *line, **lines = NULL;
|
|
int i, nlines = 0, inc;
|
|
int (*compare)(const void *, const void *) = compare_ascii;
|
|
|
|
int flags;
|
|
|
|
bb_default_error_retval = 2;
|
|
|
|
flags = bb_getopt_ulflags(argc, argv, "nru");
|
|
if (flags & 1) {
|
|
compare = compare_numeric;
|
|
}
|
|
|
|
argv += optind;
|
|
if (!*argv) {
|
|
*--argv = "-";
|
|
}
|
|
|
|
do {
|
|
fp = xgetoptfile_sort_uniq(argv, "r");
|
|
while ((line = bb_get_chomped_line_from_file(fp)) != NULL) {
|
|
lines = xrealloc(lines, sizeof(char *) * (nlines + 1));
|
|
lines[nlines++] = line;
|
|
}
|
|
bb_xferror(fp, *argv);
|
|
bb_fclose_nonstdin(fp);
|
|
} while (*++argv);
|
|
|
|
/* sort it */
|
|
qsort(lines, nlines, sizeof(char *), compare);
|
|
|
|
/* print it */
|
|
i = 0;
|
|
--nlines;
|
|
if ((inc = 1 - (flags & 2)) < 0) { /* reverse */
|
|
i = nlines;
|
|
}
|
|
flags &= 4;
|
|
|
|
while (nlines >= 0) {
|
|
if (!flags || !nlines || strcmp(lines[i+inc], lines[i])) {
|
|
puts(lines[i]);
|
|
}
|
|
i += inc;
|
|
--nlines;
|
|
}
|
|
|
|
bb_fflush_stdout_and_exit(EXIT_SUCCESS);
|
|
}
|