mirror of
https://github.com/sheumann/hush.git
synced 2024-06-26 17:29:42 +00:00
d921b2ecc0
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* uniq implementation for busybox
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*
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* Copyright (C) 2005 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/uniq.html */
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#include "busybox.h"
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static const char uniq_opts[] = "f:s:" "cdu\0\1\2\4";
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static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)
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{
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const char *n;
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if ((n = *argv) != NULL) {
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if ((*n != '-') || n[1]) {
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return xfopen(n, "r\0w" + read0write2);
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}
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}
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return (read0write2) ? stdout : stdin;
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}
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int uniq_main(int argc, char **argv)
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{
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FILE *in, *out;
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unsigned long dups, skip_fields, skip_chars, i, uniq_flags;
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const char *s0, *e0, *s1, *e1, *input_filename;
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int opt;
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uniq_flags = skip_fields = skip_chars = 0;
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while ((opt = getopt(argc, argv, uniq_opts)) > 0) {
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if ((opt == 'f') || (opt == 's')) {
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int t = bb_xgetularg10(optarg);
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if (opt == 'f') {
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skip_fields = t;
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} else {
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skip_chars = t;
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}
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} else if ((s0 = strchr(uniq_opts, opt)) != NULL) {
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uniq_flags |= s0[4];
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} else {
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bb_show_usage();
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}
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}
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input_filename = *(argv += optind);
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in = xgetoptfile_uniq_s(argv, 0);
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if (*argv) {
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++argv;
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}
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out = xgetoptfile_uniq_s(argv, 2);
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if (*argv && argv[1]) {
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bb_show_usage();
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}
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s1 = e1 = NULL; /* prime the pump */
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do {
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s0 = s1;
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e0 = e1;
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dups = 0;
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/* gnu uniq ignores newlines */
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while ((s1 = bb_get_chomped_line_from_file(in)) != NULL) {
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e1 = s1;
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for (i=skip_fields ; i ; i--) {
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e1 = skip_whitespace(e1);
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while (*e1 && !isspace(*e1)) {
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++e1;
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}
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}
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for (i = skip_chars ; *e1 && i ; i--) {
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++e1;
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}
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if (!s0 || strcmp(e0, e1)) {
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break;
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}
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++dups; /* Note: Testing for overflow seems excessive. */
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}
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if (s0) {
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if (!(uniq_flags & (2 << !!dups))) {
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bb_fprintf(out, "\0%d " + (uniq_flags & 1), dups + 1);
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bb_fprintf(out, "%s\n", s0);
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}
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free((void *)s0);
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}
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} while (s1);
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xferror(in, input_filename);
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bb_fflush_stdout_and_exit(EXIT_SUCCESS);
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}
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