2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static const char copyright[] =
37 "@(#) Copyright (c) 1989, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
43 static char sccsid[] = "@(#)uniq.c 8.3 (Berkeley) 5/4/95";
45 static const char rcsid[] =
49 #include <sys/capsicum.h>
66 static int cflag, dflag, uflag, iflag;
67 static int numchars, numfields, repeats;
69 static FILE *file(const char *, const char *);
70 static wchar_t *convert(const char *);
71 static int inlcmp(const char *, const char *);
72 static void show(FILE *, const char *);
73 static wchar_t *skip(wchar_t *);
74 static void obsolete(char *[]);
75 static void usage(void);
82 * Cache NLS data before entering capability mode.
83 * XXXPJD: There should be strerror_init() and strsignal_init() in libc.
85 (void)catopen("libc", NL_CAT_LOCALE);
89 main (int argc, char *argv[])
91 wchar_t *tprev, *tthis;
94 size_t prevbuflen, thisbuflen, b1;
95 char *prevline, *thisline, *p;
99 (void) setlocale(LC_ALL, "");
102 while ((ch = getopt(argc, argv, "cdif:s:u")) != -1)
114 numfields = strtol(optarg, &p, 10);
115 if (numfields < 0 || *p)
116 errx(1, "illegal field skip value: %s", optarg);
119 numchars = strtol(optarg, &p, 10);
120 if (numchars < 0 || *p)
121 errx(1, "illegal character skip value: %s", optarg);
140 if (argc > 0 && strcmp(argv[0], "-") != 0)
141 ifp = file(ifn = argv[0], "r");
142 cap_rights_init(&rights, CAP_FSTAT, CAP_READ);
143 if (cap_rights_limit(fileno(ifp), &rights) < 0 && errno != ENOSYS)
144 err(1, "unable to limit rights for %s", ifn);
145 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
147 ofp = file(argv[1], "w");
149 cap_rights_set(&rights, CAP_IOCTL);
150 if (cap_rights_limit(fileno(ofp), &rights) < 0 && errno != ENOSYS) {
151 err(1, "unable to limit rights for %s",
152 argc > 1 ? argv[1] : "stdout");
154 if (cap_rights_is_set(&rights, CAP_IOCTL)) {
157 cmd = TIOCGETA; /* required by isatty(3) in printf(3) */
159 if (cap_ioctls_limit(fileno(ofp), &cmd, 1) < 0 &&
161 err(1, "unable to limit ioctls for %s",
162 argc > 1 ? argv[1] : "stdout");
167 if (cap_enter() < 0 && errno != ENOSYS)
168 err(1, "unable to enter capability mode");
170 prevbuflen = thisbuflen = 0;
171 prevline = thisline = NULL;
173 if (getline(&prevline, &prevbuflen, ifp) < 0) {
178 tprev = convert(prevline);
181 while (getline(&thisline, &thisbuflen, ifp) >= 0) {
184 tthis = convert(thisline);
186 if (tthis == NULL && tprev == NULL)
187 comp = inlcmp(thisline, prevline);
188 else if (tthis == NULL || tprev == NULL)
191 comp = wcscoll(tthis, tprev);
194 /* If different, print; set previous to new value. */
199 prevbuflen = thisbuflen;
217 convert(const char *str)
220 wchar_t *buf, *ret, *p;
222 if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
224 if (SIZE_MAX / sizeof(*buf) < n + 1)
225 errx(1, "conversion buffer length overflow");
226 if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
228 if (mbstowcs(buf, str, n + 1) != n)
229 errx(1, "internal mbstowcs() error");
230 /* The last line may not end with \n. */
231 if (n > 0 && buf[n - 1] == L'\n')
234 /* If requested get the chosen fields + character offsets. */
235 if (numfields || numchars) {
236 if ((ret = wcsdup(skip(buf))) == NULL)
243 for (p = ret; *p != L'\0'; p++)
251 inlcmp(const char *s1, const char *s2)
258 c1 = (unsigned char)*s1;
259 c2 = (unsigned char)*(s2 - 1);
260 /* The last line may not end with \n. */
270 * Output a line depending on the flags and number of repetitions
274 show(FILE *ofp, const char *str)
277 if ((dflag && repeats == 0) || (uflag && repeats > 0))
280 (void)fprintf(ofp, "%4d %s", repeats + 1, str);
282 (void)fprintf(ofp, "%s", str);
290 for (nfields = 0; *str != L'\0' && nfields++ != numfields; ) {
291 while (iswblank(*str))
293 while (*str != L'\0' && !iswblank(*str))
296 for (nchars = numchars; nchars-- && *str != L'\0'; ++str)
302 file(const char *name, const char *mode)
306 if ((fp = fopen(name, mode)) == NULL)
312 obsolete(char *argv[])
315 char *ap, *p, *start;
317 while ((ap = *++argv)) {
318 /* Return if "--" or not an option of any form. */
322 } else if (ap[1] == '-')
324 if (!isdigit((unsigned char)ap[1]))
327 * Digit signifies an old-style option. Malloc space for dash,
328 * new option and argument.
331 if ((start = p = malloc(len + 3)) == NULL)
334 *p++ = ap[0] == '+' ? 's' : 'f';
335 (void)strcpy(p, ap + 1);
343 (void)fprintf(stderr,
344 "usage: uniq [-c] [-d | -u] [-i] [-f fields] [-s chars] [input [output]]\n");