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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static const char copyright[] =
39 "@(#) Copyright (c) 1989, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)uniq.c 8.3 (Berkeley) 5/4/95";
47 static const char rcsid[] =
48 "$Id: uniq.c,v 1.4 1997/09/07 15:09:22 joerg Exp $";
59 #define MAXLINELEN (8 * 1024)
61 int cflag, dflag, uflag;
62 int numchars, numfields, repeats;
64 FILE *file __P((char *, char *));
65 void show __P((FILE *, char *));
66 char *skip __P((char *));
67 void obsolete __P((char *[]));
68 static void usage __P((void));
75 register char *t1, *t2;
78 char *prevline, *thisline, *p;
81 (void) setlocale(LC_CTYPE, "");
84 while ((ch = getopt(argc, argv, "-cdif:s:u")) != -1)
99 numfields = strtol(optarg, &p, 10);
100 if (numfields < 0 || *p)
101 errx(1, "illegal field skip value: %s", optarg);
104 numchars = strtol(optarg, &p, 10);
105 if (numchars < 0 || *p)
106 errx(1, "illegal character skip value: %s", optarg);
116 done: argc -= optind;
119 /* If no flags are set, default is -d -u. */
123 } else if (!dflag && !uflag)
132 ifp = file(argv[0], "r");
136 ifp = file(argv[0], "r");
137 ofp = file(argv[1], "w");
143 prevline = malloc(MAXLINELEN);
144 thisline = malloc(MAXLINELEN);
145 if (prevline == NULL || thisline == NULL)
148 if (fgets(prevline, MAXLINELEN, ifp) == NULL)
151 while (fgets(thisline, MAXLINELEN, ifp)) {
152 /* If requested get the chosen fields + character offsets. */
153 if (numfields || numchars) {
161 /* If different, print; set previous to new value. */
163 comp = strcasecmp(t1, t2);
165 comp = strcmp(t1, t2);
182 * Output a line depending on the flags and number of repetitions
192 (void)fprintf(ofp, "%4d %s", repeats + 1, str);
193 if ((dflag && repeats) || (uflag && !repeats))
194 (void)fprintf(ofp, "%s", str);
201 register int infield, nchars, nfields;
203 for (nfields = numfields, infield = 0; nfields && *str; ++str)
204 if (isspace((unsigned char)*str)) {
211 for (nchars = numchars; nchars-- && *str; ++str);
221 if ((fp = fopen(name, mode)) == NULL)
231 char *ap, *p, *start;
233 while ((ap = *++argv)) {
234 /* Return if "--" or not an option of any form. */
238 } else if (ap[1] == '-')
240 if (!isdigit((unsigned char)ap[1]))
243 * Digit signifies an old-style option. Malloc space for dash,
244 * new option and argument.
247 if ((start = p = malloc(len + 3)) == NULL)
250 *p++ = ap[0] == '+' ? 's' : 'f';
251 (void)strcpy(p, ap + 1);
259 (void)fprintf(stderr,
260 "usage: uniq [-c | -du | -i] [-f fields] [-s chars] [input [output]]\n");