2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static const char copyright[] =
35 "@(#) Copyright (c) 1989, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
41 static char sccsid[] = "@(#)uniq.c 8.3 (Berkeley) 5/4/95";
43 static const char rcsid[] =
47 #include <sys/capsicum.h>
65 static int cflag, dflag, uflag, iflag;
66 static int numchars, numfields, repeats;
68 static FILE *file(const char *, const char *);
69 static wchar_t *convert(const char *);
70 static int inlcmp(const char *, const char *);
71 static void show(FILE *, const char *);
72 static wchar_t *skip(wchar_t *);
73 static void obsolete(char *[]);
74 static void usage(void);
81 * Cache NLS data before entering capability mode.
82 * XXXPJD: There should be strerror_init() and strsignal_init() in libc.
84 (void)catopen("libc", NL_CAT_LOCALE);
88 main (int argc, char *argv[])
90 wchar_t *tprev, *tthis;
93 size_t prevbuflen, thisbuflen, b1;
94 char *prevline, *thisline, *p;
98 (void) setlocale(LC_ALL, "");
101 while ((ch = getopt(argc, argv, "cdif:s:u")) != -1)
113 numfields = strtol(optarg, &p, 10);
114 if (numfields < 0 || *p)
115 errx(1, "illegal field skip value: %s", optarg);
118 numchars = strtol(optarg, &p, 10);
119 if (numchars < 0 || *p)
120 errx(1, "illegal character skip value: %s", optarg);
133 /* If no flags are set, default is -d -u. */
137 } else if (!dflag && !uflag)
146 if (argc > 0 && strcmp(argv[0], "-") != 0)
147 ifp = file(ifn = argv[0], "r");
148 cap_rights_init(&rights, CAP_FSTAT, CAP_READ);
149 if (cap_rights_limit(fileno(ifp), &rights) < 0 && errno != ENOSYS)
150 err(1, "unable to limit rights for %s", ifn);
151 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
153 ofp = file(argv[1], "w");
155 cap_rights_set(&rights, CAP_IOCTL);
156 if (cap_rights_limit(fileno(ofp), &rights) < 0 && errno != ENOSYS) {
157 err(1, "unable to limit rights for %s",
158 argc > 1 ? argv[1] : "stdout");
160 if (cap_rights_is_set(&rights, CAP_IOCTL)) {
163 cmd = TIOCGETA; /* required by isatty(3) in printf(3) */
165 if (cap_ioctls_limit(fileno(ofp), &cmd, 1) < 0 &&
167 err(1, "unable to limit ioctls for %s",
168 argc > 1 ? argv[1] : "stdout");
173 if (cap_enter() < 0 && errno != ENOSYS)
174 err(1, "unable to enter capability mode");
176 prevbuflen = thisbuflen = 0;
177 prevline = thisline = NULL;
179 if (getline(&prevline, &prevbuflen, ifp) < 0) {
184 tprev = convert(prevline);
186 if (!cflag && uflag && dflag)
190 while (getline(&thisline, &thisbuflen, ifp) >= 0) {
193 tthis = convert(thisline);
195 if (tthis == NULL && tprev == NULL)
196 comp = inlcmp(thisline, prevline);
197 else if (tthis == NULL || tprev == NULL)
200 comp = wcscoll(tthis, tprev);
203 /* If different, print; set previous to new value. */
204 if (cflag || !dflag || !uflag)
209 prevbuflen = thisbuflen;
213 if (!cflag && uflag && dflag)
224 if (cflag || !dflag || !uflag)
230 convert(const char *str)
233 wchar_t *buf, *ret, *p;
235 if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
237 if (SIZE_MAX / sizeof(*buf) < n + 1)
238 errx(1, "conversion buffer length overflow");
239 if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
241 if (mbstowcs(buf, str, n + 1) != n)
242 errx(1, "internal mbstowcs() error");
243 /* The last line may not end with \n. */
244 if (n > 0 && buf[n - 1] == L'\n')
247 /* If requested get the chosen fields + character offsets. */
248 if (numfields || numchars) {
249 if ((ret = wcsdup(skip(buf))) == NULL)
256 for (p = ret; *p != L'\0'; p++)
264 inlcmp(const char *s1, const char *s2)
271 c1 = (unsigned char)*s1;
272 c2 = (unsigned char)*(s2 - 1);
273 /* The last line may not end with \n. */
283 * Output a line depending on the flags and number of repetitions
287 show(FILE *ofp, const char *str)
291 (void)fprintf(ofp, "%4d %s", repeats + 1, str);
292 if ((dflag && repeats) || (uflag && !repeats))
293 (void)fprintf(ofp, "%s", str);
301 for (nfields = 0; *str != L'\0' && nfields++ != numfields; ) {
302 while (iswblank(*str))
304 while (*str != L'\0' && !iswblank(*str))
307 for (nchars = numchars; nchars-- && *str != L'\0'; ++str)
313 file(const char *name, const char *mode)
317 if ((fp = fopen(name, mode)) == NULL)
323 obsolete(char *argv[])
326 char *ap, *p, *start;
328 while ((ap = *++argv)) {
329 /* Return if "--" or not an option of any form. */
333 } else if (ap[1] == '-')
335 if (!isdigit((unsigned char)ap[1]))
338 * Digit signifies an old-style option. Malloc space for dash,
339 * new option and argument.
342 if ((start = p = malloc(len + 3)) == NULL)
345 *p++ = ap[0] == '+' ? 's' : 'f';
346 (void)strcpy(p, ap + 1);
354 (void)fprintf(stderr,
355 "usage: uniq [-c | -d | -u] [-i] [-f fields] [-s chars] [input [output]]\n");