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
36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)uniq.c 8.3 (Berkeley) 5/4/95
38 * $FreeBSD: src/usr.bin/uniq/uniq.c,v 1.11.2.3 2002/06/28 08:02:19 tjr Exp $
39 * $DragonFly: src/usr.bin/uniq/uniq.c,v 1.4 2005/01/12 01:36:50 cpressey Exp $
51 #define MAXLINELEN (LINE_MAX + 1)
53 int cflag, dflag, uflag;
54 int numchars, numfields, repeats;
56 FILE *file(const char *, const char *);
57 char *getline(char *, size_t, FILE *);
58 void show(FILE *, char *);
60 void obsolete(char *[]);
61 static void usage(void);
62 int stricoll(char *, char*);
65 main(int argc, char **argv)
67 register char *t1, *t2;
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)
120 if (argc > 0 && strcmp(argv[0], "-") != 0)
121 ifp = file(argv[0], "r");
123 ofp = file(argv[1], "w");
125 prevline = malloc(MAXLINELEN);
126 thisline = malloc(MAXLINELEN);
127 if (prevline == NULL || thisline == NULL)
130 if (getline(prevline, MAXLINELEN, ifp) == NULL)
133 while (getline(thisline, MAXLINELEN, ifp)) {
134 /* If requested get the chosen fields + character offsets. */
135 if (numfields || numchars) {
143 /* If different, print; set previous to new value. */
145 comp = stricoll(t1, t2);
147 comp = strcoll(t1, t2);
163 getline(char *buf, size_t buflen, FILE *fp)
169 while (bufpos + 2 != buflen && (ch = getc(fp)) != EOF && ch != '\n')
171 if (bufpos + 1 != buflen)
173 while (ch != EOF && ch != '\n')
176 return (bufpos != 0 || ch == '\n' ? buf : NULL);
181 * Output a line depending on the flags and number of repetitions
185 show(FILE *ofp, char *str)
189 (void)fprintf(ofp, "%4d %s\n", repeats + 1, str);
190 if ((dflag && repeats) || (uflag && !repeats))
191 (void)fprintf(ofp, "%s\n", str);
195 skip(register char *str)
197 register int nchars, nfields;
199 for (nfields = 0; *str != '\0' && nfields++ != numfields; ) {
200 while (isblank((unsigned char)*str))
202 while (*str != '\0' && !isblank((unsigned char)*str))
205 for (nchars = numchars; nchars-- && *str; ++str);
210 file(const char *name, const char *mode)
214 if ((fp = fopen(name, mode)) == NULL)
220 obsolete(char **argv)
223 char *ap, *p, *start;
225 while ((ap = *++argv)) {
226 /* Return if "--" or not an option of any form. */
230 } else if (ap[1] == '-')
232 if (!isdigit((unsigned char)ap[1]))
235 * Digit signifies an old-style option. Malloc space for dash,
236 * new option and argument.
239 if ((start = p = malloc(len + 3)) == NULL)
242 *p++ = ap[0] == '+' ? 's' : 'f';
243 (void)strcpy(p, ap + 1);
251 (void)fprintf(stderr,
252 "usage: uniq [-c | -d | -u] [-i] [-f fields] [-s chars] [input [output]]\n");
257 stricoll(char *s1, char *s2)
259 char *p, line1[MAXLINELEN], line2[MAXLINELEN];
261 for (p = line1; *s1; s1++)
262 *p++ = tolower((unsigned char)*s1);
264 for (p = line2; *s2; s2++)
265 *p++ = tolower((unsigned char)*s2);
267 return strcoll(line1, line2);