1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)jot.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 #endif 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 /* 45 * jot - print sequential or random data 46 * 47 * Author: John Kunze, Office of Comp. Affairs, UCB 48 */ 49 50 #include <sys/capsicum.h> 51 #include <capsicum_helpers.h> 52 #include <ctype.h> 53 #include <err.h> 54 #include <errno.h> 55 #include <limits.h> 56 #include <stdio.h> 57 #include <stdint.h> 58 #include <stdlib.h> 59 #include <stdbool.h> 60 #include <string.h> 61 #include <time.h> 62 #include <unistd.h> 63 64 /* Defaults */ 65 #define REPS_DEF 100 66 #define BEGIN_DEF 1 67 #define ENDER_DEF 100 68 #define STEP_DEF 1 69 70 /* Flags of options that have been set */ 71 #define HAVE_STEP 1 72 #define HAVE_ENDER 2 73 #define HAVE_BEGIN 4 74 #define HAVE_REPS 8 75 76 #define is_default(s) (*(s) == 0 || strcmp((s), "-") == 0) 77 78 static bool boring; 79 static int prec = -1; 80 static bool longdata; 81 static bool intdata; 82 static bool chardata; 83 static bool nosign; 84 static const char *sepstring = "\n"; 85 static char format[BUFSIZ]; 86 87 static void getformat(void); 88 static int getprec(const char *); 89 static int putdata(double, bool); 90 static void usage(void); 91 92 int 93 main(int argc, char **argv) 94 { 95 cap_rights_t rights; 96 bool have_format = false; 97 bool infinity = false; 98 bool nofinalnl = false; 99 bool randomize = false; 100 bool use_random = false; 101 int ch; 102 int mask = 0; 103 int n = 0; 104 double begin = BEGIN_DEF; 105 double divisor; 106 double ender = ENDER_DEF; 107 double s = STEP_DEF; 108 double x, y; 109 long i; 110 long reps = REPS_DEF; 111 112 if (caph_limit_stdio() < 0) 113 err(1, "unable to limit rights for stdio"); 114 cap_rights_init(&rights); 115 if (cap_rights_limit(STDIN_FILENO, &rights) < 0 && errno != ENOSYS) 116 err(1, "unable to limit rights for stdin"); 117 118 /* 119 * Cache NLS data, for strerror, for err(3), before entering capability 120 * mode. 121 */ 122 caph_cache_catpages(); 123 124 if (cap_enter() < 0 && errno != ENOSYS) 125 err(1, "unable to enter capability mode"); 126 127 while ((ch = getopt(argc, argv, "b:cnp:rs:w:")) != -1) 128 switch (ch) { 129 case 'b': 130 boring = true; 131 /* FALLTHROUGH */ 132 case 'w': 133 if (strlcpy(format, optarg, sizeof(format)) >= 134 sizeof(format)) 135 errx(1, "-%c word too long", ch); 136 have_format = true; 137 break; 138 case 'c': 139 chardata = true; 140 break; 141 case 'n': 142 nofinalnl = true; 143 break; 144 case 'p': 145 prec = atoi(optarg); 146 if (prec < 0) 147 errx(1, "bad precision value"); 148 have_format = true; 149 break; 150 case 'r': 151 randomize = true; 152 break; 153 case 's': 154 sepstring = optarg; 155 break; 156 default: 157 usage(); 158 } 159 argc -= optind; 160 argv += optind; 161 162 switch (argc) { /* examine args right to left, falling thru cases */ 163 case 4: 164 if (!is_default(argv[3])) { 165 if (!sscanf(argv[3], "%lf", &s)) 166 errx(1, "bad s value: %s", argv[3]); 167 mask |= HAVE_STEP; 168 if (randomize) 169 use_random = true; 170 } 171 /* FALLTHROUGH */ 172 case 3: 173 if (!is_default(argv[2])) { 174 if (!sscanf(argv[2], "%lf", &ender)) 175 ender = argv[2][strlen(argv[2])-1]; 176 mask |= HAVE_ENDER; 177 if (prec < 0) 178 n = getprec(argv[2]); 179 } 180 /* FALLTHROUGH */ 181 case 2: 182 if (!is_default(argv[1])) { 183 if (!sscanf(argv[1], "%lf", &begin)) 184 begin = argv[1][strlen(argv[1])-1]; 185 mask |= HAVE_BEGIN; 186 if (prec < 0) 187 prec = getprec(argv[1]); 188 if (n > prec) /* maximum precision */ 189 prec = n; 190 } 191 /* FALLTHROUGH */ 192 case 1: 193 if (!is_default(argv[0])) { 194 if (!sscanf(argv[0], "%ld", &reps)) 195 errx(1, "bad reps value: %s", argv[0]); 196 mask |= HAVE_REPS; 197 } 198 break; 199 case 0: 200 usage(); 201 default: 202 errx(1, "too many arguments. What do you mean by %s?", 203 argv[4]); 204 } 205 getformat(); 206 207 if (prec == -1) 208 prec = 0; 209 210 while (mask) /* 4 bit mask has 1's where last 4 args were given */ 211 switch (mask) { /* fill in the 0's by default or computation */ 212 case HAVE_STEP: 213 case HAVE_ENDER: 214 case HAVE_ENDER | HAVE_STEP: 215 case HAVE_BEGIN: 216 case HAVE_BEGIN | HAVE_STEP: 217 reps = REPS_DEF; 218 mask |= HAVE_REPS; 219 break; 220 case HAVE_BEGIN | HAVE_ENDER: 221 s = ender > begin ? 1 : -1; 222 mask |= HAVE_STEP; 223 break; 224 case HAVE_BEGIN | HAVE_ENDER | HAVE_STEP: 225 if (randomize) 226 reps = REPS_DEF; 227 else if (s == 0.0) 228 reps = 0; 229 else 230 reps = (ender - begin + s) / s; 231 if (reps <= 0) 232 errx(1, "impossible stepsize"); 233 mask = 0; 234 break; 235 case HAVE_REPS: 236 case HAVE_REPS | HAVE_STEP: 237 begin = BEGIN_DEF; 238 mask |= HAVE_BEGIN; 239 break; 240 case HAVE_REPS | HAVE_ENDER: 241 s = STEP_DEF; 242 mask = HAVE_REPS | HAVE_ENDER | HAVE_STEP; 243 break; 244 case HAVE_REPS | HAVE_ENDER | HAVE_STEP: 245 if (randomize) 246 begin = BEGIN_DEF; 247 else if (reps == 0) 248 errx(1, "must specify begin if reps == 0"); 249 begin = ender - reps * s + s; 250 mask = 0; 251 break; 252 case HAVE_REPS | HAVE_BEGIN: 253 s = STEP_DEF; 254 mask = HAVE_REPS | HAVE_BEGIN | HAVE_STEP; 255 break; 256 case HAVE_REPS | HAVE_BEGIN | HAVE_STEP: 257 if (randomize) 258 ender = ENDER_DEF; 259 else 260 ender = begin + reps * s - s; 261 mask = 0; 262 break; 263 case HAVE_REPS | HAVE_BEGIN | HAVE_ENDER: 264 if (reps == 0) 265 errx(1, "infinite sequences cannot be bounded"); 266 else if (reps == 1) 267 s = 0.0; 268 else 269 s = (ender - begin) / (reps - 1); 270 mask = 0; 271 break; 272 case HAVE_REPS | HAVE_BEGIN | HAVE_ENDER | HAVE_STEP: 273 /* if reps given and implied, */ 274 if (!randomize && s != 0.0) { 275 long t = (ender - begin + s) / s; 276 if (t <= 0) 277 errx(1, "impossible stepsize"); 278 if (t < reps) /* take lesser */ 279 reps = t; 280 } 281 mask = 0; 282 break; 283 default: 284 errx(1, "bad mask"); 285 } 286 if (reps == 0) 287 infinity = true; 288 if (randomize) { 289 if (use_random) { 290 srandom((unsigned long)s); 291 divisor = (double)INT32_MAX + 1; 292 } else 293 divisor = (double)UINT32_MAX + 1; 294 295 /* 296 * Attempt to DWIM when the user has specified an 297 * integer range within that of the random number 298 * generator: distribute the numbers equally in 299 * the range [begin .. ender]. Jot's default %.0f 300 * format would make the appearance of the first and 301 * last specified value half as likely as the rest. 302 */ 303 if (!have_format && prec == 0 && 304 begin >= 0 && begin < divisor && 305 ender >= 0 && ender < divisor) { 306 if (begin <= ender) 307 ender += 1; 308 else 309 begin += 1; 310 nosign = true; 311 intdata = true; 312 (void)strlcpy(format, 313 chardata ? "%c" : "%u", sizeof(format)); 314 } 315 x = ender - begin; 316 for (i = 1; i <= reps || infinity; i++) { 317 if (use_random) 318 y = random() / divisor; 319 else 320 y = arc4random() / divisor; 321 if (putdata(y * x + begin, !(reps - i))) 322 errx(1, "range error in conversion"); 323 } 324 } else 325 for (i = 1, x = begin; i <= reps || infinity; i++, x += s) 326 if (putdata(x, !(reps - i))) 327 errx(1, "range error in conversion"); 328 if (!nofinalnl) 329 putchar('\n'); 330 exit(0); 331 } 332 333 /* 334 * Send x to stdout using the specified format. 335 * Last is true if this is the set's last value. 336 * Return 0 if OK, or a positive number if the number passed was 337 * outside the range specified by the various flags. 338 */ 339 static int 340 putdata(double x, bool last) 341 { 342 343 if (boring) 344 printf("%s", format); 345 else if (longdata && nosign) { 346 if (x <= (double)ULONG_MAX && x >= (double)0) 347 printf(format, (unsigned long)x); 348 else 349 return (1); 350 } else if (longdata) { 351 if (x <= (double)LONG_MAX && x >= (double)LONG_MIN) 352 printf(format, (long)x); 353 else 354 return (1); 355 } else if (chardata || (intdata && !nosign)) { 356 if (x <= (double)INT_MAX && x >= (double)INT_MIN) 357 printf(format, (int)x); 358 else 359 return (1); 360 } else if (intdata) { 361 if (x <= (double)UINT_MAX && x >= (double)0) 362 printf(format, (unsigned int)x); 363 else 364 return (1); 365 366 } else 367 printf(format, x); 368 if (!last) 369 fputs(sepstring, stdout); 370 371 return (0); 372 } 373 374 static void 375 usage(void) 376 { 377 fprintf(stderr, "%s\n%s\n", 378 "usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]", 379 " [reps [begin [end [s]]]]"); 380 exit(1); 381 } 382 383 /* 384 * Return the number of digits following the number's decimal point. 385 * Return 0 if no decimal point is found. 386 */ 387 static int 388 getprec(const char *str) 389 { 390 const char *p; 391 const char *q; 392 393 for (p = str; *p; p++) 394 if (*p == '.') 395 break; 396 if (!*p) 397 return (0); 398 for (q = ++p; *p; p++) 399 if (!isdigit((unsigned char)*p)) 400 break; 401 return (p - q); 402 } 403 404 /* 405 * Set format, intdata, chardata, longdata, and nosign 406 * based on the command line arguments. 407 */ 408 static void 409 getformat(void) 410 { 411 char *p, *p2; 412 int dot, hash, space, sign, numbers = 0; 413 size_t sz; 414 415 if (boring) /* no need to bother */ 416 return; 417 for (p = format; *p; p++) /* look for '%' */ 418 if (*p == '%') { 419 if (p[1] == '%') 420 p++; /* leave %% alone */ 421 else 422 break; 423 } 424 sz = sizeof(format) - strlen(format) - 1; 425 if (!*p && !chardata) { 426 if (snprintf(p, sz, "%%.%df", prec) >= (int)sz) 427 errx(1, "-w word too long"); 428 } else if (!*p && chardata) { 429 if (strlcpy(p, "%c", sz) >= sz) 430 errx(1, "-w word too long"); 431 intdata = true; 432 } else if (!*(p+1)) { 433 if (sz <= 0) 434 errx(1, "-w word too long"); 435 strcat(format, "%"); /* cannot end in single '%' */ 436 } else { 437 /* 438 * Allow conversion format specifiers of the form 439 * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of 440 * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u} 441 */ 442 p2 = p++; 443 dot = hash = space = sign = numbers = 0; 444 while (!isalpha((unsigned char)*p)) { 445 if (isdigit((unsigned char)*p)) { 446 numbers++; 447 p++; 448 } else if ((*p == '#' && !(numbers|dot|sign|space| 449 hash++)) || 450 (*p == ' ' && !(numbers|dot|space++)) || 451 ((*p == '+' || *p == '-') && !(numbers|dot|sign++)) 452 || (*p == '.' && !(dot++))) 453 p++; 454 else 455 goto fmt_broken; 456 } 457 if (*p == 'l') { 458 longdata = true; 459 if (*++p == 'l') { 460 if (p[1] != '\0') 461 p++; 462 goto fmt_broken; 463 } 464 } 465 switch (*p) { 466 case 'o': case 'u': case 'x': case 'X': 467 intdata = nosign = true; 468 break; 469 case 'd': case 'i': 470 intdata = true; 471 break; 472 case 'D': 473 if (!longdata) { 474 intdata = true; 475 break; 476 } 477 case 'O': case 'U': 478 if (!longdata) { 479 intdata = nosign = true; 480 break; 481 } 482 case 'c': 483 if (!(intdata | longdata)) { 484 chardata = true; 485 break; 486 } 487 case 'h': case 'n': case 'p': case 'q': case 's': case 'L': 488 case '$': case '*': 489 goto fmt_broken; 490 case 'f': case 'e': case 'g': case 'E': case 'G': 491 if (!longdata) 492 break; 493 /* FALLTHROUGH */ 494 default: 495 fmt_broken: 496 *++p = '\0'; 497 errx(1, "illegal or unsupported format '%s'", p2); 498 /* NOTREACHED */ 499 } 500 while (*++p) 501 if (*p == '%' && *(p+1) && *(p+1) != '%') 502 errx(1, "too many conversions"); 503 else if (*p == '%' && *(p+1) == '%') 504 p++; 505 else if (*p == '%' && !*(p+1)) { 506 if (strlcat(format, "%", sizeof(format)) >= 507 sizeof(format)) 508 errx(1, "-w word too long"); 509 break; 510 } 511 } 512 } 513