1 /* vi: set sw=4 ts=4: */
3 * Mini sort implementation for busybox
5 * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /* BB_AUDIT SUSv3 _NOT_ compliant -- a number of options are not supported. */
24 /* http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html */
26 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
28 * Now does proper error checking on i/o. Plus some space savings.
36 #include "libcoreutils/coreutils.h"
38 static int compare_ascii(const void *x, const void *y)
40 return strcmp(*(char **)x, *(char **)y);
43 static int compare_numeric(const void *x, const void *y)
45 int z = atoi(*(char **)x) - atoi(*(char **)y);
46 return z ? z : strcmp(*(char **)x, *(char **)y);
49 int sort_main(int argc, char **argv)
52 char *line, **lines = NULL;
53 int i, nlines = 0, inc;
54 int (*compare)(const void *, const void *) = compare_ascii;
58 bb_default_error_retval = 2;
60 flags = bb_getopt_ulflags(argc, argv, "nru");
62 compare = compare_numeric;
71 fp = xgetoptfile_sort_uniq(argv, "r");
72 while ((line = bb_get_chomped_line_from_file(fp)) != NULL) {
73 lines = xrealloc(lines, sizeof(char *) * (nlines + 1));
74 lines[nlines++] = line;
76 bb_xferror(fp, *argv);
77 bb_fclose_nonstdin(fp);
81 qsort(lines, nlines, sizeof(char *), compare);
86 if ((inc = 1 - (flags & 2)) < 0) { /* reverse */
92 if (!flags || !nlines || strcmp(lines[i+inc], lines[i])) {
99 bb_fflush_stdout_and_exit(EXIT_SUCCESS);