| File: | src/usr.bin/cut/cut.c |
| Warning: | line 111, column 2 Value stored to 'argc' is never read |
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| 1 | /* $OpenBSD: cut.c,v 1.26 2019/02/07 19:11:23 tobias Exp $ */ |
| 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. |
| 19 | * 3. Neither the name of the University nor the names of its contributors |
| 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 | #include <assert.h> |
| 37 | #include <ctype.h> |
| 38 | #include <err.h> |
| 39 | #include <errno(*__errno()).h> |
| 40 | #include <limits.h> |
| 41 | #include <locale.h> |
| 42 | #include <stdio.h> |
| 43 | #include <stdlib.h> |
| 44 | #include <string.h> |
| 45 | #include <unistd.h> |
| 46 | |
| 47 | char dchar[5]; |
| 48 | int dlen; |
| 49 | |
| 50 | int bflag; |
| 51 | int cflag; |
| 52 | int dflag; |
| 53 | int fflag; |
| 54 | int nflag; |
| 55 | int sflag; |
| 56 | |
| 57 | void b_cut(FILE *, char *); |
| 58 | void c_cut(FILE *, char *); |
| 59 | void f_cut(FILE *, char *); |
| 60 | void get_list(char *); |
| 61 | void usage(void); |
| 62 | |
| 63 | int |
| 64 | main(int argc, char *argv[]) |
| 65 | { |
| 66 | FILE *fp; |
| 67 | void (*fcn)(FILE *, char *); |
| 68 | int ch, rval; |
| 69 | |
| 70 | setlocale(LC_CTYPE2, ""); |
| 71 | |
| 72 | if (pledge("stdio rpath", NULL((void *)0)) == -1) |
| 73 | err(1, "pledge"); |
| 74 | |
| 75 | dchar[0] = '\t'; /* default delimiter */ |
| 76 | dchar[1] = '\0'; |
| 77 | dlen = 1; |
| 78 | |
| 79 | while ((ch = getopt(argc, argv, "b:c:d:f:sn")) != -1) |
| 80 | switch(ch) { |
| 81 | case 'b': |
| 82 | get_list(optarg); |
| 83 | bflag = 1; |
| 84 | break; |
| 85 | case 'c': |
| 86 | get_list(optarg); |
| 87 | cflag = 1; |
| 88 | break; |
| 89 | case 'd': |
| 90 | if ((dlen = mblen(optarg, MB_CUR_MAX__mb_cur_max())) == -1) |
| 91 | usage(); |
| 92 | assert(dlen < sizeof(dchar))((dlen < sizeof(dchar)) ? (void)0 : __assert2("/usr/src/usr.bin/cut/cut.c" , 92, __func__, "dlen < sizeof(dchar)")); |
| 93 | (void)memcpy(dchar, optarg, dlen); |
| 94 | dchar[dlen] = '\0'; |
| 95 | dflag = 1; |
| 96 | break; |
| 97 | case 'f': |
| 98 | get_list(optarg); |
| 99 | fflag = 1; |
| 100 | break; |
| 101 | case 'n': |
| 102 | nflag = 1; |
| 103 | break; |
| 104 | case 's': |
| 105 | sflag = 1; |
| 106 | break; |
| 107 | case '?': |
| 108 | default: |
| 109 | usage(); |
| 110 | } |
| 111 | argc -= optind; |
Value stored to 'argc' is never read | |
| 112 | argv += optind; |
| 113 | |
| 114 | if (bflag + cflag + fflag != 1 || |
| 115 | (nflag && !bflag) || |
| 116 | ((dflag || sflag) && !fflag)) |
| 117 | usage(); |
| 118 | |
| 119 | if (MB_CUR_MAX__mb_cur_max() == 1) { |
| 120 | nflag = 0; |
| 121 | if (cflag) { |
| 122 | bflag = 1; |
| 123 | cflag = 0; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | fcn = fflag ? f_cut : (cflag || nflag) ? c_cut : b_cut; |
| 128 | |
| 129 | rval = 0; |
| 130 | if (*argv) |
| 131 | for (; *argv; ++argv) { |
| 132 | if (strcmp(*argv, "-") == 0) |
| 133 | fcn(stdin(&__sF[0]), "stdin"); |
| 134 | else { |
| 135 | if ((fp = fopen(*argv, "r"))) { |
| 136 | fcn(fp, *argv); |
| 137 | (void)fclose(fp); |
| 138 | } else { |
| 139 | rval = 1; |
| 140 | warn("%s", *argv); |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | else { |
| 145 | if (pledge("stdio", NULL((void *)0)) == -1) |
| 146 | err(1, "pledge"); |
| 147 | |
| 148 | fcn(stdin(&__sF[0]), "stdin"); |
| 149 | } |
| 150 | exit(rval); |
| 151 | } |
| 152 | |
| 153 | int autostart, autostop, maxval; |
| 154 | |
| 155 | char positions[_POSIX2_LINE_MAX2048 + 1]; |
| 156 | |
| 157 | int |
| 158 | read_number(char **p) |
| 159 | { |
| 160 | int dash, n; |
| 161 | const char *errstr; |
| 162 | char *q; |
| 163 | |
| 164 | q = *p + strcspn(*p, "-"); |
| 165 | dash = *q == '-'; |
| 166 | *q = '\0'; |
| 167 | n = strtonum(*p, 1, _POSIX2_LINE_MAX2048, &errstr); |
| 168 | if (errstr != NULL((void *)0)) |
| 169 | errx(1, "[-bcf] list: %s %s (allowed 1-%d)", *p, errstr, |
| 170 | _POSIX2_LINE_MAX2048); |
| 171 | if (dash) |
| 172 | *q = '-'; |
| 173 | *p = q; |
| 174 | |
| 175 | return n; |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | get_list(char *list) |
| 180 | { |
| 181 | int setautostart, start, stop; |
| 182 | char *p; |
| 183 | |
| 184 | /* |
| 185 | * set a byte in the positions array to indicate if a field or |
| 186 | * column is to be selected; use +1, it's 1-based, not 0-based. |
| 187 | * This parser is less restrictive than the Draft 9 POSIX spec. |
| 188 | * POSIX doesn't allow lists that aren't in increasing order or |
| 189 | * overlapping lists. We also handle "-3-5" although there's no |
| 190 | * real reason too. |
| 191 | */ |
| 192 | while ((p = strsep(&list, ", \t"))) { |
| 193 | setautostart = start = stop = 0; |
| 194 | if (*p == '-') { |
| 195 | ++p; |
| 196 | setautostart = 1; |
| 197 | } |
| 198 | if (isdigit((unsigned char)*p)) { |
| 199 | start = stop = read_number(&p); |
| 200 | if (setautostart && start > autostart) |
| 201 | autostart = start; |
| 202 | } |
| 203 | if (*p == '-') { |
| 204 | if (isdigit((unsigned char)p[1])) { |
| 205 | ++p; |
| 206 | stop = read_number(&p); |
| 207 | } |
| 208 | if (*p == '-') { |
| 209 | ++p; |
| 210 | if (!autostop || autostop > stop) |
| 211 | autostop = stop; |
| 212 | } |
| 213 | } |
| 214 | if (*p != '\0' || !stop || !start) |
| 215 | errx(1, "[-bcf] list: illegal list value"); |
| 216 | if (maxval < stop) |
| 217 | maxval = stop; |
| 218 | if (start <= stop) |
| 219 | memset(positions + start, 1, stop - start + 1); |
| 220 | } |
| 221 | |
| 222 | /* overlapping ranges */ |
| 223 | if (autostop && maxval > autostop) |
| 224 | maxval = autostop; |
| 225 | |
| 226 | /* set autostart */ |
| 227 | if (autostart) |
| 228 | memset(positions + 1, '1', autostart); |
| 229 | } |
| 230 | |
| 231 | /* ARGSUSED */ |
| 232 | void |
| 233 | b_cut(FILE *fp, char *fname) |
| 234 | { |
| 235 | int ch, col; |
| 236 | char *pos; |
| 237 | |
| 238 | for (;;) { |
| 239 | pos = positions + 1; |
| 240 | for (col = maxval; col; --col) { |
| 241 | if ((ch = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp))) == EOF(-1)) |
| 242 | return; |
| 243 | if (ch == '\n') |
| 244 | break; |
| 245 | if (*pos++) |
| 246 | (void)putchar(ch)(!__isthreaded ? __sputc(ch, (&__sF[1])) : (putc)(ch, (& __sF[1]))); |
| 247 | } |
| 248 | if (ch != '\n') { |
| 249 | if (autostop) |
| 250 | while ((ch = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp))) != EOF(-1) && ch != '\n') |
| 251 | (void)putchar(ch)(!__isthreaded ? __sputc(ch, (&__sF[1])) : (putc)(ch, (& __sF[1]))); |
| 252 | else |
| 253 | while ((ch = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp))) != EOF(-1) && ch != '\n') |
| 254 | ; |
| 255 | } |
| 256 | (void)putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | void |
| 261 | c_cut(FILE *fp, char *fname) |
| 262 | { |
| 263 | static char *line = NULL((void *)0); |
| 264 | static size_t linesz = 0; |
| 265 | ssize_t linelen; |
| 266 | char *cp, *pos, *maxpos; |
| 267 | int len; |
| 268 | |
| 269 | while ((linelen = getline(&line, &linesz, fp)) != -1) { |
| 270 | if (line[linelen - 1] == '\n') |
| 271 | line[linelen - 1] = '\0'; |
| 272 | |
| 273 | cp = line; |
| 274 | pos = positions + 1; |
| 275 | maxpos = pos + maxval; |
| 276 | while(pos < maxpos && *cp != '\0') { |
| 277 | len = mblen(cp, MB_CUR_MAX__mb_cur_max()); |
| 278 | if (len == -1) |
| 279 | len = 1; |
| 280 | pos += nflag ? len : 1; |
| 281 | if (pos[-1] == '\0') |
| 282 | cp += len; |
| 283 | else |
| 284 | while (len--) |
| 285 | putchar(*cp++)(!__isthreaded ? __sputc(*cp++, (&__sF[1])) : (putc)(*cp++ , (&__sF[1]))); |
| 286 | } |
| 287 | if (autostop) |
| 288 | puts(cp); |
| 289 | else |
| 290 | putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | void |
| 295 | f_cut(FILE *fp, char *fname) |
| 296 | { |
| 297 | static char *line = NULL((void *)0); |
| 298 | static size_t linesz = 0; |
| 299 | ssize_t linelen; |
| 300 | char *sp, *ep, *pos, *maxpos; |
| 301 | int output; |
| 302 | |
| 303 | while ((linelen = getline(&line, &linesz, fp)) != -1) { |
| 304 | if (line[linelen - 1] == '\n') |
| 305 | line[linelen - 1] = '\0'; |
| 306 | |
| 307 | if ((ep = strstr(line, dchar)) == NULL((void *)0)) { |
| 308 | if (!sflag) |
| 309 | puts(line); |
| 310 | continue; |
| 311 | } |
| 312 | |
| 313 | pos = positions + 1; |
| 314 | maxpos = pos + maxval; |
| 315 | output = 0; |
| 316 | sp = line; |
| 317 | for (;;) { |
| 318 | if (*pos++) { |
| 319 | if (output) |
| 320 | fputs(dchar, stdout(&__sF[1])); |
| 321 | while (sp < ep) |
| 322 | putchar(*sp++)(!__isthreaded ? __sputc(*sp++, (&__sF[1])) : (putc)(*sp++ , (&__sF[1]))); |
| 323 | output = 1; |
| 324 | } else |
| 325 | sp = ep; |
| 326 | if (*sp == '\0' || pos == maxpos) |
| 327 | break; |
| 328 | sp += dlen; |
| 329 | if ((ep = strstr(sp, dchar)) == NULL((void *)0)) |
| 330 | ep = strchr(sp, '\0'); |
| 331 | } |
| 332 | if (autostop) |
| 333 | puts(sp); |
| 334 | else |
| 335 | putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | void |
| 340 | usage(void) |
| 341 | { |
| 342 | (void)fprintf(stderr(&__sF[2]), |
| 343 | "usage: cut -b list [-n] [file ...]\n" |
| 344 | " cut -c list [file ...]\n" |
| 345 | " cut -f list [-s] [-d delim] [file ...]\n"); |
| 346 | exit(1); |
| 347 | } |