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![Ian Lepore](/assets/img/avatar_default.png)
This adds a new -D/--all-repeats option to uniq(1), which outputs each copy of any repeated lines (as opposed to a single copy of a repeated line). You can specify a separator option to output a blank line before or after each group of repeated lines. This adds compatibility with the GNU coreutils version of uniq(1). This change also re-groups the -c, -d, -D, -u options in the usage display and man page to indicate that they are mutally exclusive of each other. This matches the posix/opengroup definition of uniq(1) command line args. Note that this change does NOT actually enforce the mutual exclusion in the code, for now, it simply documents that the arguments should be considered exclusive with each other. Differential Revision: https://reviews.freebsd.org/D22262
379 lines
8.8 KiB
C
379 lines
8.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Case Larsen.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)uniq.c 8.3 (Berkeley) 5/4/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/capsicum.h>
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#include <capsicum_helpers.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <getopt.h>
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#include <limits.h>
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#include <locale.h>
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#include <nl_types.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <wchar.h>
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#include <wctype.h>
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static int Dflag, cflag, dflag, uflag, iflag;
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static int numchars, numfields, repeats;
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/* Dflag values */
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#define DF_NONE 0
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#define DF_NOSEP 1
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#define DF_PRESEP 2
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#define DF_POSTSEP 3
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static const struct option long_opts[] =
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{
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{"all-repeated",optional_argument, NULL, 'D'},
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{"count", no_argument, NULL, 'c'},
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{"repeated", no_argument, NULL, 'd'},
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{"skip-fields", required_argument, NULL, 'f'},
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{"ignore-case", no_argument, NULL, 'i'},
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{"skip-chars", required_argument, NULL, 's'},
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{"unique", no_argument, NULL, 'u'},
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{NULL, no_argument, NULL, 0}
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};
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static FILE *file(const char *, const char *);
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static wchar_t *convert(const char *);
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static int inlcmp(const char *, const char *);
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static void show(FILE *, const char *);
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static wchar_t *skip(wchar_t *);
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static void obsolete(char *[]);
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static void usage(void);
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int
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main (int argc, char *argv[])
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{
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wchar_t *tprev, *tthis;
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FILE *ifp, *ofp;
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int ch, comp;
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size_t prevbuflen, thisbuflen, b1;
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char *prevline, *thisline, *p;
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const char *ifn;
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cap_rights_t rights;
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(void) setlocale(LC_ALL, "");
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obsolete(argv);
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while ((ch = getopt_long(argc, argv, "+D::cdif:s:u", long_opts,
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NULL)) != -1)
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switch (ch) {
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case 'D':
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if (optarg == NULL || strcasecmp(optarg, "none") == 0)
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Dflag = DF_NOSEP;
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else if (strcasecmp(optarg, "prepend") == 0)
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Dflag = DF_PRESEP;
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else if (strcasecmp(optarg, "separate") == 0)
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Dflag = DF_POSTSEP;
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else
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usage();
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break;
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case 'c':
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cflag = 1;
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break;
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case 'd':
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dflag = 1;
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break;
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case 'i':
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iflag = 1;
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break;
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case 'f':
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numfields = strtol(optarg, &p, 10);
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if (numfields < 0 || *p)
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errx(1, "illegal field skip value: %s", optarg);
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break;
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case 's':
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numchars = strtol(optarg, &p, 10);
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if (numchars < 0 || *p)
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errx(1, "illegal character skip value: %s", optarg);
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break;
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case 'u':
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uflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc > 2)
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usage();
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ifp = stdin;
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ifn = "stdin";
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ofp = stdout;
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if (argc > 0 && strcmp(argv[0], "-") != 0)
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ifp = file(ifn = argv[0], "r");
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cap_rights_init(&rights, CAP_FSTAT, CAP_READ);
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if (caph_rights_limit(fileno(ifp), &rights) < 0)
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err(1, "unable to limit rights for %s", ifn);
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cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
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if (argc > 1)
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ofp = file(argv[1], "w");
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else
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cap_rights_set(&rights, CAP_IOCTL);
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if (caph_rights_limit(fileno(ofp), &rights) < 0) {
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err(1, "unable to limit rights for %s",
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argc > 1 ? argv[1] : "stdout");
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}
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if (cap_rights_is_set(&rights, CAP_IOCTL)) {
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unsigned long cmd;
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cmd = TIOCGETA; /* required by isatty(3) in printf(3) */
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if (caph_ioctls_limit(fileno(ofp), &cmd, 1) < 0) {
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err(1, "unable to limit ioctls for %s",
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argc > 1 ? argv[1] : "stdout");
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}
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}
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caph_cache_catpages();
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if (caph_enter() < 0)
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err(1, "unable to enter capability mode");
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prevbuflen = thisbuflen = 0;
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prevline = thisline = NULL;
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if (getline(&prevline, &prevbuflen, ifp) < 0) {
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if (ferror(ifp))
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err(1, "%s", ifn);
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exit(0);
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}
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tprev = convert(prevline);
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tthis = NULL;
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while (getline(&thisline, &thisbuflen, ifp) >= 0) {
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if (tthis != NULL)
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free(tthis);
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tthis = convert(thisline);
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if (tthis == NULL && tprev == NULL)
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comp = inlcmp(thisline, prevline);
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else if (tthis == NULL || tprev == NULL)
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comp = 1;
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else
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comp = wcscoll(tthis, tprev);
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if (comp) {
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/* If different, print; set previous to new value. */
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if (Dflag == DF_POSTSEP && repeats > 0)
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fputc('\n', ofp);
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if (!Dflag)
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show(ofp, prevline);
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p = prevline;
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b1 = prevbuflen;
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prevline = thisline;
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prevbuflen = thisbuflen;
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if (tprev != NULL)
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free(tprev);
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tprev = tthis;
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thisline = p;
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thisbuflen = b1;
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tthis = NULL;
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repeats = 0;
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} else {
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if (Dflag) {
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if (repeats == 0) {
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if (Dflag == DF_PRESEP)
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fputc('\n', ofp);
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show(ofp, prevline);
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}
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show(ofp, thisline);
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}
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++repeats;
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}
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}
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if (ferror(ifp))
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err(1, "%s", ifn);
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if (!Dflag)
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show(ofp, prevline);
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exit(0);
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}
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static wchar_t *
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convert(const char *str)
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{
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size_t n;
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wchar_t *buf, *ret, *p;
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if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
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return (NULL);
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if (SIZE_MAX / sizeof(*buf) < n + 1)
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errx(1, "conversion buffer length overflow");
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if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
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err(1, "malloc");
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if (mbstowcs(buf, str, n + 1) != n)
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errx(1, "internal mbstowcs() error");
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/* The last line may not end with \n. */
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if (n > 0 && buf[n - 1] == L'\n')
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buf[n - 1] = L'\0';
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/* If requested get the chosen fields + character offsets. */
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if (numfields || numchars) {
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if ((ret = wcsdup(skip(buf))) == NULL)
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err(1, "wcsdup");
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free(buf);
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} else
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ret = buf;
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if (iflag) {
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for (p = ret; *p != L'\0'; p++)
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*p = towlower(*p);
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}
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return (ret);
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}
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static int
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inlcmp(const char *s1, const char *s2)
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{
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int c1, c2;
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while (*s1 == *s2++)
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if (*s1++ == '\0')
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return (0);
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c1 = (unsigned char)*s1;
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c2 = (unsigned char)*(s2 - 1);
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/* The last line may not end with \n. */
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if (c1 == '\n')
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c1 = '\0';
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if (c2 == '\n')
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c2 = '\0';
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return (c1 - c2);
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}
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/*
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* show --
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* Output a line depending on the flags and number of repetitions
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* of the line.
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*/
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static void
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show(FILE *ofp, const char *str)
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{
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if ((!Dflag && dflag && repeats == 0) || (uflag && repeats > 0))
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return;
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if (cflag)
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(void)fprintf(ofp, "%4d %s", repeats + 1, str);
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else
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(void)fprintf(ofp, "%s", str);
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}
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static wchar_t *
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skip(wchar_t *str)
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{
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int nchars, nfields;
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for (nfields = 0; *str != L'\0' && nfields++ != numfields; ) {
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while (iswblank(*str))
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str++;
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while (*str != L'\0' && !iswblank(*str))
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str++;
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}
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for (nchars = numchars; nchars-- && *str != L'\0'; ++str)
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;
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return(str);
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}
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static FILE *
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file(const char *name, const char *mode)
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{
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FILE *fp;
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if ((fp = fopen(name, mode)) == NULL)
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err(1, "%s", name);
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return(fp);
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}
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static void
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obsolete(char *argv[])
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{
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int len;
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char *ap, *p, *start;
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while ((ap = *++argv)) {
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/* Return if "--" or not an option of any form. */
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if (ap[0] != '-') {
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if (ap[0] != '+')
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return;
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} else if (ap[1] == '-')
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return;
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if (!isdigit((unsigned char)ap[1]))
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continue;
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/*
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* Digit signifies an old-style option. Malloc space for dash,
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* new option and argument.
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*/
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len = strlen(ap);
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if ((start = p = malloc(len + 3)) == NULL)
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err(1, "malloc");
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*p++ = '-';
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*p++ = ap[0] == '+' ? 's' : 'f';
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(void)strcpy(p, ap + 1);
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*argv = start;
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}
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: uniq [-c | -d | -D | -u] [-i] [-f fields] [-s chars] [input [output]]\n");
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exit(1);
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}
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