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 * 3. 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
32 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
33 * @(#)uniq.c 8.3 (Berkeley) 5/4/95
34 * $FreeBSD: head/usr.bin/uniq/uniq.c 303526 2016-07-30 01:07:47Z bapt $
52 static int cflag, dflag, uflag, iflag;
53 static int numchars, numfields, repeats;
55 static FILE *file(const char *, const char *);
56 static wchar_t *convert(const char *);
57 static int inlcmp(const char *, const char *);
58 static void show(FILE *, const char *);
59 static wchar_t *skip(wchar_t *);
60 static void obsolete(char *[]);
61 static void usage(void);
64 main(int argc, char *argv[])
66 wchar_t *tprev, *tthis;
69 size_t prevbuflen, thisbuflen, b1;
70 char *prevline, *thisline, *p;
73 (void) setlocale(LC_ALL, "");
76 while ((ch = getopt(argc, argv, "cdif:s:u")) != -1)
88 numfields = strtol(optarg, &p, 10);
89 if (numfields < 0 || *p)
90 errx(1, "illegal field skip value: %s", optarg);
93 numchars = strtol(optarg, &p, 10);
94 if (numchars < 0 || *p)
95 errx(1, "illegal character skip value: %s", optarg);
108 /* If no flags are set, default is -d -u. */
112 } else if (!dflag && !uflag)
121 if (argc > 0 && strcmp(argv[0], "-") != 0)
122 ifp = file(ifn = argv[0], "r");
124 ofp = file(argv[1], "w");
126 prevbuflen = thisbuflen = 0;
127 prevline = thisline = NULL;
129 if (getline(&prevline, &prevbuflen, ifp) < 0) {
134 tprev = convert(prevline);
136 if (!cflag && uflag && dflag)
140 while (getline(&thisline, &thisbuflen, ifp) >= 0) {
143 tthis = convert(thisline);
145 if (tthis == NULL && tprev == NULL)
146 comp = inlcmp(thisline, prevline);
147 else if (tthis == NULL || tprev == NULL)
150 comp = wcscoll(tthis, tprev);
153 /* If different, print; set previous to new value. */
154 if (cflag || !dflag || !uflag)
159 prevbuflen = thisbuflen;
163 if (!cflag && uflag && dflag)
174 if (cflag || !dflag || !uflag)
180 convert(const char *str)
183 wchar_t *buf, *ret, *p;
185 if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
187 if (SIZE_MAX / sizeof(*buf) < n + 1)
188 errx(1, "conversion buffer length overflow");
189 if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
191 if (mbstowcs(buf, str, n + 1) != n)
192 errx(1, "internal mbstowcs() error");
193 /* The last line may not end with \n. */
194 if (n > 0 && buf[n - 1] == L'\n')
197 /* If requested get the chosen fields + character offsets. */
198 if (numfields || numchars) {
199 if ((ret = wcsdup(skip(buf))) == NULL)
206 for (p = ret; *p != L'\0'; p++)
214 inlcmp(const char *s1, const char *s2)
221 c1 = (unsigned char)*s1;
222 c2 = (unsigned char)*(s2 - 1);
223 /* The last line may not end with \n. */
233 * Output a line depending on the flags and number of repetitions
237 show(FILE *ofp, const char *str)
241 (void)fprintf(ofp, "%4d %s", repeats + 1, str);
242 if ((dflag && repeats) || (uflag && !repeats))
243 (void)fprintf(ofp, "%s", str);
251 for (nfields = 0; *str != L'\0' && nfields++ != numfields; ) {
252 while (iswblank(*str))
254 while (*str != L'\0' && !iswblank(*str))
257 for (nchars = numchars; nchars-- && *str != L'\0'; ++str)
263 file(const char *name, const char *mode)
267 if ((fp = fopen(name, mode)) == NULL)
273 obsolete(char *argv[])
276 char *ap, *p, *start;
278 while ((ap = *++argv)) {
279 /* Return if "--" or not an option of any form. */
283 } else if (ap[1] == '-')
285 if (!isdigit((unsigned char)ap[1]))
288 * Digit signifies an old-style option. Malloc space for dash,
289 * new option and argument.
292 if ((start = p = malloc(len + 3)) == NULL)
295 *p++ = ap[0] == '+' ? 's' : 'f';
296 (void)strcpy(p, ap + 1);
304 (void)fprintf(stderr,
305 "usage: uniq [-c | -d | -u] [-i] [-f fields] [-s chars] [input [output]]\n");