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1.12 ! jmc 1: /* $OpenBSD: cut.c,v 1.11 2003/06/10 22:20:45 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: cut.c,v 1.9 1995/09/02 05:59:23 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: * Adam S. Moskowitz of Menlo Consulting and Marciano Pitargue.
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.
1.10 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:
36: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1989, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "@(#)cut.c 8.3 (Berkeley) 5/4/95";
45: #endif
1.12 ! jmc 46: static char rcsid[] = "$OpenBSD: cut.c,v 1.11 2003/06/10 22:20:45 deraadt Exp $";
1.1 deraadt 47: #endif /* not lint */
48:
49: #include <ctype.h>
50: #include <err.h>
51: #include <errno.h>
52: #include <limits.h>
53: #include <locale.h>
54: #include <stdio.h>
55: #include <stdlib.h>
56: #include <string.h>
57: #include <unistd.h>
58:
59: int cflag;
60: char dchar;
61: int dflag;
62: int fflag;
63: int sflag;
64:
1.9 millert 65: void c_cut(FILE *, char *);
66: void f_cut(FILE *, char *);
67: void get_list(char *);
68: void usage(void);
1.1 deraadt 69:
70: int
1.11 deraadt 71: main(int argc, char *argv[])
1.1 deraadt 72: {
73: FILE *fp;
1.9 millert 74: void (*fcn)(FILE *, char *);
1.1 deraadt 75: int ch;
76:
77: setlocale (LC_ALL, "");
78:
79: dchar = '\t'; /* default delimiter is \t */
80:
81: /* Since we don't support multi-byte characters, the -c and -b
82: options are equivalent, and the -n option is meaningless. */
1.3 millert 83: while ((ch = getopt(argc, argv, "b:c:d:f:sn")) != -1)
1.1 deraadt 84: switch(ch) {
85: case 'b':
86: case 'c':
87: fcn = c_cut;
88: get_list(optarg);
89: cflag = 1;
90: break;
91: case 'd':
92: dchar = *optarg;
93: dflag = 1;
94: break;
95: case 'f':
96: get_list(optarg);
97: fcn = f_cut;
98: fflag = 1;
99: break;
100: case 's':
101: sflag = 1;
102: break;
103: case 'n':
104: break;
105: case '?':
106: default:
107: usage();
108: }
109: argc -= optind;
110: argv += optind;
111:
112: if (fflag) {
113: if (cflag)
114: usage();
115: } else if (!cflag || dflag || sflag)
116: usage();
117:
118: if (*argv)
119: for (; *argv; ++argv) {
120: if (!(fp = fopen(*argv, "r")))
121: err(1, "%s", *argv);
122: fcn(fp, *argv);
123: (void)fclose(fp);
124: }
125: else
126: fcn(stdin, "stdin");
127: exit(0);
128: }
129:
130: int autostart, autostop, maxval;
131:
132: char positions[_POSIX2_LINE_MAX + 1];
133:
134: void
1.11 deraadt 135: get_list(char *list)
1.1 deraadt 136: {
1.8 mpech 137: int setautostart, start, stop;
138: char *pos;
1.1 deraadt 139: char *p;
140:
141: /*
142: * set a byte in the positions array to indicate if a field or
143: * column is to be selected; use +1, it's 1-based, not 0-based.
144: * This parser is less restrictive than the Draft 9 POSIX spec.
145: * POSIX doesn't allow lists that aren't in increasing order or
146: * overlapping lists. We also handle "-3-5" although there's no
147: * real reason too.
148: */
1.7 aaron 149: while ((p = strsep(&list, ", \t"))) {
1.1 deraadt 150: setautostart = start = stop = 0;
151: if (*p == '-') {
152: ++p;
153: setautostart = 1;
154: }
155: if (isdigit(*p)) {
156: start = stop = strtol(p, &p, 10);
157: if (setautostart && start > autostart)
158: autostart = start;
159: }
160: if (*p == '-') {
161: if (isdigit(p[1]))
162: stop = strtol(p + 1, &p, 10);
163: if (*p == '-') {
164: ++p;
165: if (!autostop || autostop > stop)
166: autostop = stop;
167: }
168: }
169: if (*p)
1.4 millert 170: errx(1, "[-cf] list: illegal list value");
1.1 deraadt 171: if (!stop || !start)
1.4 millert 172: errx(1, "[-cf] list: values may not include zero");
1.1 deraadt 173: if (stop > _POSIX2_LINE_MAX)
1.4 millert 174: errx(1, "[-cf] list: %d too large (max %d)",
1.1 deraadt 175: stop, _POSIX2_LINE_MAX);
176: if (maxval < stop)
177: maxval = stop;
1.7 aaron 178: for (pos = positions + start; start++ <= stop; *pos++ = 1)
179: ;
1.1 deraadt 180: }
181:
182: /* overlapping ranges */
183: if (autostop && maxval > autostop)
184: maxval = autostop;
185:
186: /* set autostart */
187: if (autostart)
188: memset(positions + 1, '1', autostart);
189: }
190:
191: /* ARGSUSED */
192: void
1.11 deraadt 193: c_cut(FILE *fp, char *fname)
1.1 deraadt 194: {
1.8 mpech 195: int ch, col;
196: char *pos;
1.1 deraadt 197:
198: for (;;) {
199: pos = positions + 1;
200: for (col = maxval; col; --col) {
201: if ((ch = getc(fp)) == EOF)
202: return;
203: if (ch == '\n')
204: break;
205: if (*pos++)
206: (void)putchar(ch);
207: }
1.7 aaron 208: if (ch != '\n') {
1.1 deraadt 209: if (autostop)
210: while ((ch = getc(fp)) != EOF && ch != '\n')
211: (void)putchar(ch);
212: else
1.7 aaron 213: while ((ch = getc(fp)) != EOF && ch != '\n')
214: ;
215: }
1.1 deraadt 216: (void)putchar('\n');
217: }
218: }
219:
220: void
1.11 deraadt 221: f_cut(FILE *fp, char *fname)
1.1 deraadt 222: {
1.8 mpech 223: int ch, field, isdelim;
224: char *pos, *p, sep;
1.1 deraadt 225: int output;
1.7 aaron 226: size_t len;
227: char *lbuf, *tbuf;
1.1 deraadt 228:
1.7 aaron 229: for (sep = dchar, tbuf = NULL; (lbuf = fgetln(fp, &len));) {
1.1 deraadt 230: output = 0;
1.7 aaron 231: if (lbuf[len - 1] != '\n') {
232: /* no newline at the end of the last line so add one */
233: if ((tbuf = (char *)malloc(len + 1)) == NULL)
234: err(1, NULL);
235: memcpy(tbuf, lbuf, len);
236: tbuf[len] = '\n';
237: lbuf = tbuf;
238: }
1.1 deraadt 239: for (isdelim = 0, p = lbuf;; ++p) {
1.7 aaron 240: ch = *p;
1.1 deraadt 241: /* this should work if newline is delimiter */
242: if (ch == sep)
243: isdelim = 1;
244: if (ch == '\n') {
245: if (!isdelim && !sflag)
1.7 aaron 246: (void)fwrite(lbuf, len, 1, stdout);
1.1 deraadt 247: break;
248: }
249: }
250: if (!isdelim)
251: continue;
252:
253: pos = positions + 1;
254: for (field = maxval, p = lbuf; field; --field, ++pos) {
255: if (*pos) {
256: if (output++)
257: (void)putchar(sep);
258: while ((ch = *p++) != '\n' && ch != sep)
259: (void)putchar(ch);
260: } else
1.7 aaron 261: while ((ch = *p++) != '\n' && ch != sep)
262: ;
1.1 deraadt 263: if (ch == '\n')
264: break;
265: }
1.7 aaron 266: if (ch != '\n') {
1.1 deraadt 267: if (autostop) {
268: if (output)
269: (void)putchar(sep);
270: for (; (ch = *p) != '\n'; ++p)
271: (void)putchar(ch);
272: } else
1.7 aaron 273: for (; (ch = *p) != '\n'; ++p)
274: ;
275: }
1.1 deraadt 276: (void)putchar('\n');
277: }
1.7 aaron 278: if (tbuf)
279: free(tbuf);
1.1 deraadt 280: }
281:
282: void
1.11 deraadt 283: usage(void)
1.1 deraadt 284: {
285: (void)fprintf(stderr,
1.12 ! jmc 286: "usage: cut -b list [-n] [file ...]\n"
! 287: "\tcut -c list [file ...]\n"
! 288: "\tcut -f list [-d delim] [-s] [file ...]\n");
1.1 deraadt 289: exit(1);
290: }