mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-21 02:06:37 +00:00
899837e8f5
MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: kevans Differential Revision: https://reviews.freebsd.org/D43407
373 lines
8.9 KiB
C
373 lines
8.9 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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#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 <stdbool.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 enum { DF_NONE, DF_NOSEP, DF_PRESEP, DF_POSTSEP } Dflag;
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static bool cflag, dflag, uflag, iflag;
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static long long numchars, numfields, repeats;
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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 *errstr, *ifn, *ofn;
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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 = true;
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break;
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case 'd':
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dflag = true;
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break;
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case 'i':
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iflag = true;
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break;
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case 'f':
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numfields = strtonum(optarg, 0, INT_MAX, &errstr);
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if (errstr)
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errx(1, "field skip value is %s: %s", errstr, optarg);
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break;
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case 's':
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numchars = strtonum(optarg, 0, INT_MAX, &errstr);
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if (errstr != NULL)
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errx(1, "character skip value is %s: %s", errstr, optarg);
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break;
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case 'u':
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uflag = true;
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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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if (Dflag && dflag)
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dflag = false;
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ifp = stdin;
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ifn = "stdin";
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ofp = stdout;
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ofn = "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(ofn = 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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if (!cflag && !Dflag && !dflag && !uflag)
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show(ofp, prevline);
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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 (!cflag && !Dflag && !dflag && !uflag)
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show(ofp, thisline);
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else if (!Dflag &&
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(!dflag || (cflag && repeats > 0)) &&
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(!uflag || repeats == 0))
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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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} else if (dflag && !cflag) {
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if (repeats == 0)
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show(ofp, prevline);
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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 (!cflag && !Dflag && !dflag && !uflag)
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/* already printed */ ;
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else if (!Dflag &&
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(!dflag || (cflag && repeats > 0)) &&
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(!uflag || repeats == 0))
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show(ofp, prevline);
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if (fflush(ofp) != 0)
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err(1, "%s", ofn);
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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 (cflag)
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(void)fprintf(ofp, "%4lld %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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long long 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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char *ap, *p;
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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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}
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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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if (asprintf(&p, "-%c%s", ap[0] == '+' ? 's' : 'f', ap + 1) < 0)
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err(1, "malloc");
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*argv = p;
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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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