fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
357 lines
8.3 KiB
C
357 lines
8.3 KiB
C
/*
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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 <ctype.h>
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#include <err.h>
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#include <errno.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 cflag, dflag, uflag, iflag;
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static int numchars, numfields, repeats;
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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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static void
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strerror_init(void)
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{
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/*
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* Cache NLS data before entering capability mode.
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* XXXPJD: There should be strerror_init() and strsignal_init() in libc.
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*/
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(void)catopen("libc", NL_CAT_LOCALE);
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}
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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(argc, argv, "cdif:s:u")) != -1)
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switch (ch) {
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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 no flags are set, default is -d -u. */
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if (cflag) {
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if (dflag || uflag)
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usage();
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} else if (!dflag && !uflag)
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dflag = uflag = 1;
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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 (cap_rights_limit(fileno(ifp), &rights) < 0 && errno != ENOSYS)
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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 (cap_rights_limit(fileno(ofp), &rights) < 0 && errno != ENOSYS) {
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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 (cap_ioctls_limit(fileno(ofp), &cmd, 1) < 0 &&
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errno != ENOSYS) {
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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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strerror_init();
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if (cap_enter() < 0 && errno != ENOSYS)
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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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if (!cflag && uflag && dflag)
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show(ofp, 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 (cflag || !dflag || !uflag)
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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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if (!cflag && uflag && dflag)
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show(ofp, prevline);
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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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++repeats;
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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 || !uflag)
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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 (cflag)
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(void)fprintf(ofp, "%4d %s", repeats + 1, str);
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if ((dflag && repeats) || (uflag && !repeats))
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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 | -u] [-i] [-f fields] [-s chars] [input [output]]\n");
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exit(1);
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}
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