Annotation of src/usr.bin/uniq/uniq.c, Revision 1.29
1.29 ! cheloha 1: /* $OpenBSD: uniq.c,v 1.28 2021/11/01 23:20:35 cheloha Exp $ */
1.1 deraadt 2: /* $NetBSD: uniq.c,v 1.7 1995/08/31 22:03:48 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1989, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Case Larsen.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.14 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
1.15 ray 36: #include <ctype.h>
37: #include <err.h>
1.1 deraadt 38: #include <errno.h>
1.15 ray 39: #include <limits.h>
1.24 schwarze 40: #include <locale.h>
1.1 deraadt 41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
44: #include <unistd.h>
1.24 schwarze 45: #include <wchar.h>
46: #include <wctype.h>
1.1 deraadt 47:
1.25 tb 48: int cflag, dflag, iflag, uflag;
1.1 deraadt 49: int numchars, numfields, repeats;
50:
1.9 millert 51: FILE *file(char *, char *);
52: void show(FILE *, char *);
53: char *skip(char *);
54: void obsolete(char *[]);
1.15 ray 55: __dead void usage(void);
1.1 deraadt 56:
57: int
1.10 deraadt 58: main(int argc, char *argv[])
1.1 deraadt 59: {
1.28 cheloha 60: char *prevline, *t1, *t2, *thisline;
1.10 deraadt 61: FILE *ifp = NULL, *ofp = NULL;
1.28 cheloha 62: size_t prevsize, thissize, tmpsize;
1.29 ! cheloha 63: ssize_t len;
1.1 deraadt 64: int ch;
65:
1.24 schwarze 66: setlocale(LC_CTYPE, "");
67:
1.22 deraadt 68: if (pledge("stdio rpath wpath cpath", NULL) == -1)
69: err(1, "pledge");
1.20 deraadt 70:
1.1 deraadt 71: obsolete(argv);
1.25 tb 72: while ((ch = getopt(argc, argv, "cdf:is:u")) != -1) {
1.15 ray 73: const char *errstr;
74:
1.1 deraadt 75: switch (ch) {
76: case 'c':
77: cflag = 1;
78: break;
79: case 'd':
80: dflag = 1;
81: break;
82: case 'f':
1.15 ray 83: numfields = (int)strtonum(optarg, 0, INT_MAX,
84: &errstr);
85: if (errstr)
86: errx(1, "field skip value is %s: %s",
87: errstr, optarg);
1.1 deraadt 88: break;
1.25 tb 89: case 'i':
90: iflag = 1;
91: break;
1.1 deraadt 92: case 's':
1.15 ray 93: numchars = (int)strtonum(optarg, 0, INT_MAX,
94: &errstr);
95: if (errstr)
96: errx(1,
97: "character skip value is %s: %s",
98: errstr, optarg);
1.1 deraadt 99: break;
100: case 'u':
101: uflag = 1;
102: break;
103: default:
104: usage();
1.15 ray 105: }
1.1 deraadt 106: }
107:
1.11 millert 108: argc -= optind;
1.15 ray 109: argv += optind;
1.1 deraadt 110:
1.16 kili 111: /* If neither -d nor -u are set, default is -d -u. */
112: if (!dflag && !uflag)
1.1 deraadt 113: dflag = uflag = 1;
114:
1.27 deraadt 115: switch (argc) {
1.1 deraadt 116: case 0:
117: ifp = stdin;
118: ofp = stdout;
119: break;
120: case 1:
121: ifp = file(argv[0], "r");
122: ofp = stdout;
123: break;
124: case 2:
125: ifp = file(argv[0], "r");
126: ofp = file(argv[1], "w");
127: break;
128: default:
129: usage();
130: }
1.20 deraadt 131:
1.22 deraadt 132: if (pledge("stdio", NULL) == -1)
133: err(1, "pledge");
1.1 deraadt 134:
1.28 cheloha 135: prevsize = 0;
136: prevline = NULL;
1.29 ! cheloha 137: if ((len = getline(&prevline, &prevsize, ifp)) == -1) {
1.28 cheloha 138: free(prevline);
139: if (ferror(ifp))
140: err(1, "getline");
1.1 deraadt 141: exit(0);
1.28 cheloha 142: }
1.29 ! cheloha 143: if (prevline[len - 1] == '\n')
! 144: prevline[len - 1] = '\0';
1.28 cheloha 145:
146: thissize = 0;
147: thisline = NULL;
1.29 ! cheloha 148: while ((len = getline(&thisline, &thissize, ifp)) != -1) {
! 149: if (thisline[len - 1] == '\n')
! 150: thisline[len - 1] = '\0';
! 151:
1.1 deraadt 152: /* If requested get the chosen fields + character offsets. */
153: if (numfields || numchars) {
154: t1 = skip(thisline);
155: t2 = skip(prevline);
156: } else {
157: t1 = thisline;
158: t2 = prevline;
159: }
160:
161: /* If different, print; set previous to new value. */
1.26 tb 162: if ((iflag ? strcasecmp : strcmp)(t1, t2)) {
1.1 deraadt 163: show(ofp, prevline);
164: t1 = prevline;
165: prevline = thisline;
166: thisline = t1;
1.28 cheloha 167: tmpsize = prevsize;
168: prevsize = thissize;
169: thissize = tmpsize;
1.1 deraadt 170: repeats = 0;
171: } else
172: ++repeats;
173: }
1.28 cheloha 174: free(thisline);
175: if (ferror(ifp))
176: err(1, "getline");
177:
1.1 deraadt 178: show(ofp, prevline);
1.28 cheloha 179: free(prevline);
180:
1.1 deraadt 181: exit(0);
182: }
183:
184: /*
185: * show --
186: * Output a line depending on the flags and number of repetitions
187: * of the line.
188: */
189: void
1.10 deraadt 190: show(FILE *ofp, char *str)
1.1 deraadt 191: {
1.16 kili 192: if ((dflag && repeats) || (uflag && !repeats)) {
193: if (cflag)
1.29 ! cheloha 194: fprintf(ofp, "%4d %s\n", repeats + 1, str);
1.16 kili 195: else
1.29 ! cheloha 196: fprintf(ofp, "%s\n", str);
1.16 kili 197: }
1.1 deraadt 198: }
199:
200: char *
1.10 deraadt 201: skip(char *str)
1.1 deraadt 202: {
1.24 schwarze 203: wchar_t wc;
1.16 kili 204: int nchars, nfields;
1.24 schwarze 205: int len;
206: int field_started;
1.1 deraadt 207:
1.16 kili 208: for (nfields = numfields; nfields && *str; nfields--) {
1.24 schwarze 209: /* Skip one field, including preceding blanks. */
210: for (field_started = 0; *str != '\0'; str += len) {
211: if ((len = mbtowc(&wc, str, MB_CUR_MAX)) == -1) {
212: (void)mbtowc(NULL, NULL, MB_CUR_MAX);
213: wc = L'?';
214: len = 1;
215: }
216: if (iswblank(wc)) {
217: if (field_started)
218: break;
219: } else
220: field_started = 1;
221: }
1.16 kili 222: }
1.24 schwarze 223:
224: /* Skip some additional characters. */
225: for (nchars = numchars; nchars-- && *str != '\0'; str += len)
226: if ((len = mblen(str, MB_CUR_MAX)) == -1)
227: len = 1;
228:
1.15 ray 229: return (str);
1.1 deraadt 230: }
231:
232: FILE *
1.10 deraadt 233: file(char *name, char *mode)
1.1 deraadt 234: {
235: FILE *fp;
236:
1.12 millert 237: if (strcmp(name, "-") == 0)
238: return(*mode == 'r' ? stdin : stdout);
1.1 deraadt 239: if ((fp = fopen(name, mode)) == NULL)
1.6 millert 240: err(1, "%s", name);
1.15 ray 241: return (fp);
1.1 deraadt 242: }
243:
244: void
1.10 deraadt 245: obsolete(char *argv[])
1.1 deraadt 246: {
1.15 ray 247: size_t len;
1.1 deraadt 248: char *ap, *p, *start;
249:
1.7 deraadt 250: while ((ap = *++argv)) {
1.1 deraadt 251: /* Return if "--" or not an option of any form. */
252: if (ap[0] != '-') {
253: if (ap[0] != '+')
254: return;
255: } else if (ap[1] == '-')
256: return;
1.23 mmcc 257: if (!isdigit((unsigned char)ap[1]))
1.1 deraadt 258: continue;
259: /*
260: * Digit signifies an old-style option. Malloc space for dash,
261: * new option and argument.
262: */
1.13 deraadt 263: len = strlen(ap) + 3;
264: if ((start = p = malloc(len)) == NULL)
1.5 mickey 265: err(1, "malloc");
1.1 deraadt 266: *p++ = '-';
267: *p++ = ap[0] == '+' ? 's' : 'f';
1.13 deraadt 268: (void)strlcpy(p, ap + 1, len - 2);
1.1 deraadt 269: *argv = start;
270: }
271: }
272:
1.15 ray 273: __dead void
1.10 deraadt 274: usage(void)
1.1 deraadt 275: {
1.15 ray 276: extern char *__progname;
1.16 kili 277:
1.1 deraadt 278: (void)fprintf(stderr,
1.25 tb 279: "usage: %s [-ci] [-d | -u] [-f fields] [-s chars] [input_file [output_file]]\n",
1.15 ray 280: __progname);
1.1 deraadt 281: exit(1);
282: }
![[BACK]](/icons/back.gif){kind=icon}
Return to uniq.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / uniq