args.c revision 296156
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993, 1994 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Keith Muller of the University of California, San Diego and Lance 71556Srgrimes * Visser of Convex Computer Corporation. 81556Srgrimes * 91556Srgrimes * Redistribution and use in source and binary forms, with or without 101556Srgrimes * modification, are permitted provided that the following conditions 111556Srgrimes * are met: 121556Srgrimes * 1. Redistributions of source code must retain the above copyright 131556Srgrimes * notice, this list of conditions and the following disclaimer. 141556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 151556Srgrimes * notice, this list of conditions and the following disclaimer in the 161556Srgrimes * documentation and/or other materials provided with the distribution. 171556Srgrimes * 4. Neither the name of the University nor the names of its contributors 181556Srgrimes * may be used to endorse or promote products derived from this software 191556Srgrimes * without specific prior written permission. 201556Srgrimes * 211556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311556Srgrimes * SUCH DAMAGE. 321556Srgrimes */ 331556Srgrimes 341556Srgrimes#ifndef lint 3535773Scharnier#if 0 3636007Scharnierstatic char sccsid[] = "@(#)args.c 8.3 (Berkeley) 4/2/94"; 3735773Scharnier#endif 381556Srgrimes#endif /* not lint */ 3999109Sobrien#include <sys/cdefs.h> 4099109Sobrien__FBSDID("$FreeBSD: head/bin/dd/args.c 296156 2016-02-28 10:27:12Z trasz $"); 411556Srgrimes 421556Srgrimes#include <sys/types.h> 431556Srgrimes 441556Srgrimes#include <err.h> 451556Srgrimes#include <errno.h> 46111629Smarkm#include <inttypes.h> 471556Srgrimes#include <limits.h> 48250469Seadler#include <signal.h> 491556Srgrimes#include <stdlib.h> 501556Srgrimes#include <string.h> 511556Srgrimes 521556Srgrimes#include "dd.h" 531556Srgrimes#include "extern.h" 541556Srgrimes 5590108Simpstatic int c_arg(const void *, const void *); 5690108Simpstatic int c_conv(const void *, const void *); 5790108Simpstatic void f_bs(char *); 5890108Simpstatic void f_cbs(char *); 5990108Simpstatic void f_conv(char *); 6090108Simpstatic void f_count(char *); 6190108Simpstatic void f_files(char *); 62133762Srwatsonstatic void f_fillchar(char *); 6390108Simpstatic void f_ibs(char *); 6490108Simpstatic void f_if(char *); 6590108Simpstatic void f_obs(char *); 6690108Simpstatic void f_of(char *); 6790108Simpstatic void f_seek(char *); 6890108Simpstatic void f_skip(char *); 69296156Straszstatic void f_speed(char *); 70264059Sdelphijstatic void f_status(char *); 71111629Smarkmstatic uintmax_t get_num(const char *); 7290108Simpstatic off_t get_off_t(const char *); 731556Srgrimes 7451208Sgreenstatic const struct arg { 7554245Sgreen const char *name; 7690108Simp void (*f)(char *); 771556Srgrimes u_int set, noset; 781556Srgrimes} args[] = { 791556Srgrimes { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC }, 801556Srgrimes { "cbs", f_cbs, C_CBS, C_CBS }, 811556Srgrimes { "conv", f_conv, 0, 0 }, 821556Srgrimes { "count", f_count, C_COUNT, C_COUNT }, 831556Srgrimes { "files", f_files, C_FILES, C_FILES }, 84133762Srwatson { "fillchar", f_fillchar, C_FILL, C_FILL }, 851556Srgrimes { "ibs", f_ibs, C_IBS, C_BS|C_IBS }, 861556Srgrimes { "if", f_if, C_IF, C_IF }, 8757523Sgreen { "iseek", f_skip, C_SKIP, C_SKIP }, 881556Srgrimes { "obs", f_obs, C_OBS, C_BS|C_OBS }, 891556Srgrimes { "of", f_of, C_OF, C_OF }, 9057523Sgreen { "oseek", f_seek, C_SEEK, C_SEEK }, 911556Srgrimes { "seek", f_seek, C_SEEK, C_SEEK }, 921556Srgrimes { "skip", f_skip, C_SKIP, C_SKIP }, 93296156Strasz { "speed", f_speed, 0, 0 }, 94264059Sdelphij { "status", f_status, C_STATUS,C_STATUS }, 951556Srgrimes}; 961556Srgrimes 971556Srgrimesstatic char *oper; 981556Srgrimes 991556Srgrimes/* 1001556Srgrimes * args -- parse JCL syntax of dd. 1011556Srgrimes */ 1021556Srgrimesvoid 10390108Simpjcl(char **argv) 1041556Srgrimes{ 1051556Srgrimes struct arg *ap, tmp; 1061556Srgrimes char *arg; 1071556Srgrimes 1081556Srgrimes in.dbsz = out.dbsz = 512; 1091556Srgrimes 11019720Sphk while ((oper = *++argv) != NULL) { 11130230Seivind if ((oper = strdup(oper)) == NULL) 11248051Sgreen errx(1, "unable to allocate space for the argument \"%s\"", *argv); 1131556Srgrimes if ((arg = strchr(oper, '=')) == NULL) 1141556Srgrimes errx(1, "unknown operand %s", oper); 1151556Srgrimes *arg++ = '\0'; 1161556Srgrimes if (!*arg) 1171556Srgrimes errx(1, "no value specified for %s", oper); 1181556Srgrimes tmp.name = oper; 11948051Sgreen if (!(ap = (struct arg *)bsearch(&tmp, args, 12048051Sgreen sizeof(args)/sizeof(struct arg), sizeof(struct arg), 12148051Sgreen c_arg))) 1221556Srgrimes errx(1, "unknown operand %s", tmp.name); 1231556Srgrimes if (ddflags & ap->noset) 12448051Sgreen errx(1, "%s: illegal argument combination or already set", 12548051Sgreen tmp.name); 1261556Srgrimes ddflags |= ap->set; 1271556Srgrimes ap->f(arg); 1281556Srgrimes } 1291556Srgrimes 1301556Srgrimes /* Final sanity checks. */ 1311556Srgrimes 1321556Srgrimes if (ddflags & C_BS) { 1331556Srgrimes /* 1341556Srgrimes * Bs is turned off by any conversion -- we assume the user 1351556Srgrimes * just wanted to set both the input and output block sizes 1361556Srgrimes * and didn't want the bs semantics, so we don't warn. 1371556Srgrimes */ 13862311Sgreen if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE | 13962311Sgreen C_UNBLOCK)) 1401556Srgrimes ddflags &= ~C_BS; 1411556Srgrimes 1421556Srgrimes /* Bs supersedes ibs and obs. */ 14362311Sgreen if (ddflags & C_BS && ddflags & (C_IBS | C_OBS)) 1441556Srgrimes warnx("bs supersedes ibs and obs"); 1451556Srgrimes } 1461556Srgrimes 1471556Srgrimes /* 1481556Srgrimes * Ascii/ebcdic and cbs implies block/unblock. 1491556Srgrimes * Block/unblock requires cbs and vice-versa. 1501556Srgrimes */ 15151249Sgreen if (ddflags & (C_BLOCK | C_UNBLOCK)) { 1521556Srgrimes if (!(ddflags & C_CBS)) 1531556Srgrimes errx(1, "record operations require cbs"); 1541556Srgrimes if (cbsz == 0) 1551556Srgrimes errx(1, "cbs cannot be zero"); 1561556Srgrimes cfunc = ddflags & C_BLOCK ? block : unblock; 1571556Srgrimes } else if (ddflags & C_CBS) { 15851249Sgreen if (ddflags & (C_ASCII | C_EBCDIC)) { 1591556Srgrimes if (ddflags & C_ASCII) { 1601556Srgrimes ddflags |= C_UNBLOCK; 1611556Srgrimes cfunc = unblock; 1621556Srgrimes } else { 1631556Srgrimes ddflags |= C_BLOCK; 1641556Srgrimes cfunc = block; 1651556Srgrimes } 1661556Srgrimes } else 1671556Srgrimes errx(1, "cbs meaningless if not doing record operations"); 1681556Srgrimes } else 1691556Srgrimes cfunc = def; 17051249Sgreen 17151208Sgreen /* 17251208Sgreen * Bail out if the calculation of a file offset would overflow. 17351208Sgreen */ 174111629Smarkm if (in.offset > OFF_MAX / (ssize_t)in.dbsz || 175111629Smarkm out.offset > OFF_MAX / (ssize_t)out.dbsz) 176273743Spi errx(1, "seek offsets cannot be larger than %jd", 177273743Spi (intmax_t)OFF_MAX); 1781556Srgrimes} 1791556Srgrimes 1801556Srgrimesstatic int 18190108Simpc_arg(const void *a, const void *b) 1821556Srgrimes{ 1831556Srgrimes 18454278Sgreen return (strcmp(((const struct arg *)a)->name, 18554278Sgreen ((const struct arg *)b)->name)); 1861556Srgrimes} 1871556Srgrimes 1881556Srgrimesstatic void 18990108Simpf_bs(char *arg) 1901556Srgrimes{ 191273743Spi uintmax_t res; 1921556Srgrimes 193273743Spi res = get_num(arg); 194273743Spi if (res < 1 || res > SSIZE_MAX) 195273743Spi errx(1, "bs must be between 1 and %jd", (intmax_t)SSIZE_MAX); 196273743Spi in.dbsz = out.dbsz = (size_t)res; 1971556Srgrimes} 1981556Srgrimes 1991556Srgrimesstatic void 20090108Simpf_cbs(char *arg) 2011556Srgrimes{ 202273743Spi uintmax_t res; 2031556Srgrimes 204273743Spi res = get_num(arg); 205273743Spi if (res < 1 || res > SSIZE_MAX) 206273743Spi errx(1, "cbs must be between 1 and %jd", (intmax_t)SSIZE_MAX); 207273743Spi cbsz = (size_t)res; 2081556Srgrimes} 2091556Srgrimes 2101556Srgrimesstatic void 21190108Simpf_count(char *arg) 2121556Srgrimes{ 213273743Spi intmax_t res; 2141556Srgrimes 215273743Spi res = (intmax_t)get_num(arg); 216273743Spi if (res < 0) 217273743Spi errx(1, "count cannot be negative"); 218273743Spi if (res == 0) 219273743Spi cpy_cnt = (uintmax_t)-1; 220273743Spi else 221273743Spi cpy_cnt = (uintmax_t)res; 2221556Srgrimes} 2231556Srgrimes 2241556Srgrimesstatic void 22590108Simpf_files(char *arg) 2261556Srgrimes{ 2271556Srgrimes 22851137Sgreen files_cnt = get_num(arg); 22951249Sgreen if (files_cnt < 1) 230273743Spi errx(1, "files must be between 1 and %jd", (uintmax_t)-1); 2311556Srgrimes} 2321556Srgrimes 2331556Srgrimesstatic void 234133762Srwatsonf_fillchar(char *arg) 235133762Srwatson{ 236133762Srwatson 237133762Srwatson if (strlen(arg) != 1) 238133762Srwatson errx(1, "need exactly one fill char"); 239133762Srwatson 240133762Srwatson fill_char = arg[0]; 241133762Srwatson} 242133762Srwatson 243133762Srwatsonstatic void 24490108Simpf_ibs(char *arg) 2451556Srgrimes{ 246273743Spi uintmax_t res; 2471556Srgrimes 24848051Sgreen if (!(ddflags & C_BS)) { 249273743Spi res = get_num(arg); 250273743Spi if (res < 1 || res > SSIZE_MAX) 251273743Spi errx(1, "ibs must be between 1 and %jd", 252273743Spi (intmax_t)SSIZE_MAX); 253273743Spi in.dbsz = (size_t)res; 25448051Sgreen } 2551556Srgrimes} 2561556Srgrimes 2571556Srgrimesstatic void 25890108Simpf_if(char *arg) 2591556Srgrimes{ 2601556Srgrimes 2611556Srgrimes in.name = arg; 2621556Srgrimes} 2631556Srgrimes 2641556Srgrimesstatic void 26590108Simpf_obs(char *arg) 2661556Srgrimes{ 267273743Spi uintmax_t res; 2681556Srgrimes 26948051Sgreen if (!(ddflags & C_BS)) { 270273743Spi res = get_num(arg); 271273743Spi if (res < 1 || res > SSIZE_MAX) 272273743Spi errx(1, "obs must be between 1 and %jd", 273273743Spi (intmax_t)SSIZE_MAX); 274273743Spi out.dbsz = (size_t)res; 27548051Sgreen } 2761556Srgrimes} 2771556Srgrimes 2781556Srgrimesstatic void 27990108Simpf_of(char *arg) 2801556Srgrimes{ 2811556Srgrimes 2821556Srgrimes out.name = arg; 2831556Srgrimes} 2841556Srgrimes 2851556Srgrimesstatic void 28690108Simpf_seek(char *arg) 2871556Srgrimes{ 2881556Srgrimes 28989788Sgreen out.offset = get_off_t(arg); 2901556Srgrimes} 2911556Srgrimes 2921556Srgrimesstatic void 29390108Simpf_skip(char *arg) 2941556Srgrimes{ 2951556Srgrimes 29689788Sgreen in.offset = get_off_t(arg); 2971556Srgrimes} 2981556Srgrimes 299264059Sdelphijstatic void 300296156Straszf_speed(char *arg) 301296156Strasz{ 302296156Strasz 303296156Strasz speed = get_num(arg); 304296156Strasz} 305296156Strasz 306296156Straszstatic void 307264059Sdelphijf_status(char *arg) 308264059Sdelphij{ 309264059Sdelphij 310264059Sdelphij if (strcmp(arg, "none") == 0) 311264059Sdelphij ddflags |= C_NOINFO; 312264059Sdelphij else if (strcmp(arg, "noxfer") == 0) 313264059Sdelphij ddflags |= C_NOXFER; 314264059Sdelphij else 315264059Sdelphij errx(1, "unknown status %s", arg); 316264059Sdelphij} 317264059Sdelphij 31851208Sgreenstatic const struct conv { 31954245Sgreen const char *name; 3201556Srgrimes u_int set, noset; 32151208Sgreen const u_char *ctab; 3221556Srgrimes} clist[] = { 3231556Srgrimes { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, 3241556Srgrimes { "block", C_BLOCK, C_UNBLOCK, NULL }, 3251556Srgrimes { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, 3261556Srgrimes { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, 3271556Srgrimes { "lcase", C_LCASE, C_UCASE, NULL }, 3281556Srgrimes { "noerror", C_NOERROR, 0, NULL }, 3291556Srgrimes { "notrunc", C_NOTRUNC, 0, NULL }, 3301556Srgrimes { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, 3311556Srgrimes { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, 3321556Srgrimes { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V }, 33331120Sjoerg { "osync", C_OSYNC, C_BS, NULL }, 334126667Sphk { "pareven", C_PAREVEN, C_PARODD|C_PARSET|C_PARNONE, NULL}, 335126667Sphk { "parnone", C_PARNONE, C_PARODD|C_PARSET|C_PAREVEN, NULL}, 336126667Sphk { "parodd", C_PARODD, C_PAREVEN|C_PARSET|C_PARNONE, NULL}, 337126667Sphk { "parset", C_PARSET, C_PARODD|C_PAREVEN|C_PARNONE, NULL}, 33830312Sjoerg { "sparse", C_SPARSE, 0, NULL }, 3391556Srgrimes { "swab", C_SWAB, 0, NULL }, 3401556Srgrimes { "sync", C_SYNC, 0, NULL }, 3411556Srgrimes { "ucase", C_UCASE, C_LCASE, NULL }, 3421556Srgrimes { "unblock", C_UNBLOCK, C_BLOCK, NULL }, 3431556Srgrimes}; 3441556Srgrimes 3451556Srgrimesstatic void 34690108Simpf_conv(char *arg) 3471556Srgrimes{ 3481556Srgrimes struct conv *cp, tmp; 3491556Srgrimes 3501556Srgrimes while (arg != NULL) { 3511556Srgrimes tmp.name = strsep(&arg, ","); 35251208Sgreen cp = bsearch(&tmp, clist, sizeof(clist) / sizeof(struct conv), 35351208Sgreen sizeof(struct conv), c_conv); 35451208Sgreen if (cp == NULL) 3551556Srgrimes errx(1, "unknown conversion %s", tmp.name); 3561556Srgrimes if (ddflags & cp->noset) 3571556Srgrimes errx(1, "%s: illegal conversion combination", tmp.name); 3581556Srgrimes ddflags |= cp->set; 3591556Srgrimes if (cp->ctab) 3601556Srgrimes ctab = cp->ctab; 3611556Srgrimes } 3621556Srgrimes} 3631556Srgrimes 3641556Srgrimesstatic int 36590108Simpc_conv(const void *a, const void *b) 3661556Srgrimes{ 3671556Srgrimes 36854278Sgreen return (strcmp(((const struct conv *)a)->name, 36954278Sgreen ((const struct conv *)b)->name)); 3701556Srgrimes} 3711556Srgrimes 372295427Straszstatic intmax_t 373295260Straszpostfix_to_mult(const char expr) 374295260Strasz{ 375295427Strasz intmax_t mult; 376295260Strasz 377295260Strasz mult = 0; 378295260Strasz switch (expr) { 379295260Strasz case 'B': 380295260Strasz case 'b': 381295260Strasz mult = 512; 382295260Strasz break; 383295260Strasz case 'K': 384295260Strasz case 'k': 385295260Strasz mult = 1 << 10; 386295260Strasz break; 387295260Strasz case 'M': 388295260Strasz case 'm': 389295260Strasz mult = 1 << 20; 390295260Strasz break; 391295260Strasz case 'G': 392295260Strasz case 'g': 393295260Strasz mult = 1 << 30; 394295260Strasz break; 395295261Strasz case 'T': 396295261Strasz case 't': 397295261Strasz mult = (uintmax_t)1 << 40; 398295261Strasz break; 399295261Strasz case 'P': 400295261Strasz case 'p': 401295261Strasz mult = (uintmax_t)1 << 50; 402295261Strasz break; 403295260Strasz case 'W': 404295260Strasz case 'w': 405295260Strasz mult = sizeof(int); 406295260Strasz break; 407295260Strasz } 408295260Strasz 409295260Strasz return (mult); 410295260Strasz} 411295260Strasz 4121556Srgrimes/* 413111629Smarkm * Convert an expression of the following forms to a uintmax_t. 4141556Srgrimes * 1) A positive decimal number. 415132933Spjd * 2) A positive decimal number followed by a 'b' or 'B' (mult by 512). 416132933Spjd * 3) A positive decimal number followed by a 'k' or 'K' (mult by 1 << 10). 417132933Spjd * 4) A positive decimal number followed by a 'm' or 'M' (mult by 1 << 20). 418132933Spjd * 5) A positive decimal number followed by a 'g' or 'G' (mult by 1 << 30). 419295428Strasz * 6) A positive decimal number followed by a 't' or 'T' (mult by 1 << 40). 420295428Strasz * 7) A positive decimal number followed by a 'p' or 'P' (mult by 1 << 50). 421295428Strasz * 8) A positive decimal number followed by a 'w' or 'W' (mult by sizeof int). 422295428Strasz * 9) Two or more positive decimal numbers (with/without [BbKkMmGgWw]) 423132933Spjd * separated by 'x' or 'X' (also '*' for backwards compatibility), 424132933Spjd * specifying the product of the indicated values. 4251556Srgrimes */ 426111629Smarkmstatic uintmax_t 42790108Simpget_num(const char *val) 4281556Srgrimes{ 429111629Smarkm uintmax_t num, mult, prevnum; 4301556Srgrimes char *expr; 4311556Srgrimes 43248051Sgreen errno = 0; 433295426Strasz num = strtoumax(val, &expr, 0); 434295854Strasz if (expr == val) /* No valid digits. */ 435295854Strasz errx(1, "%s: invalid numeric value", oper); 436295854Strasz if (errno != 0) 43748051Sgreen err(1, "%s", oper); 4381556Srgrimes 439295260Strasz mult = postfix_to_mult(*expr); 4401556Srgrimes 44189788Sgreen if (mult != 0) { 44289788Sgreen prevnum = num; 44389788Sgreen num *= mult; 44489788Sgreen /* Check for overflow. */ 44589788Sgreen if (num / mult != prevnum) 44689788Sgreen goto erange; 44789788Sgreen expr++; 44889788Sgreen } 44989788Sgreen 45051137Sgreen switch (*expr) { 4511556Srgrimes case '\0': 4521556Srgrimes break; 4531556Srgrimes case '*': /* Backward compatible. */ 454132933Spjd case 'X': 4551556Srgrimes case 'x': 45689788Sgreen mult = get_num(expr + 1); 45789788Sgreen prevnum = num; 45889788Sgreen num *= mult; 45989788Sgreen if (num / mult == prevnum) 46051137Sgreen break; 46151137Sgreenerange: 46251137Sgreen errx(1, "%s: %s", oper, strerror(ERANGE)); 4631556Srgrimes default: 4641556Srgrimes errx(1, "%s: illegal numeric value", oper); 4651556Srgrimes } 4661556Srgrimes return (num); 4671556Srgrimes} 46851208Sgreen 46989788Sgreen/* 47089788Sgreen * Convert an expression of the following forms to an off_t. This is the 47189788Sgreen * same as get_num(), but it uses signed numbers. 47289788Sgreen * 473111629Smarkm * The major problem here is that an off_t may not necessarily be a intmax_t. 47489788Sgreen */ 47551208Sgreenstatic off_t 47690108Simpget_off_t(const char *val) 47751208Sgreen{ 478111629Smarkm intmax_t num, mult, prevnum; 47989788Sgreen char *expr; 48051208Sgreen 48189788Sgreen errno = 0; 482295426Strasz num = strtoimax(val, &expr, 0); 483295854Strasz if (expr == val) /* No valid digits. */ 484295854Strasz errx(1, "%s: invalid numeric value", oper); 485295854Strasz if (errno != 0) 48689788Sgreen err(1, "%s", oper); 48789788Sgreen 488295260Strasz mult = postfix_to_mult(*expr); 48989788Sgreen 49089788Sgreen if (mult != 0) { 49189788Sgreen prevnum = num; 49289788Sgreen num *= mult; 49389788Sgreen /* Check for overflow. */ 49489788Sgreen if ((prevnum > 0) != (num > 0) || num / mult != prevnum) 49589788Sgreen goto erange; 49689788Sgreen expr++; 49789788Sgreen } 49889788Sgreen 49989788Sgreen switch (*expr) { 50089788Sgreen case '\0': 50189788Sgreen break; 50289788Sgreen case '*': /* Backward compatible. */ 503132933Spjd case 'X': 50489788Sgreen case 'x': 505111629Smarkm mult = (intmax_t)get_off_t(expr + 1); 50689788Sgreen prevnum = num; 50789788Sgreen num *= mult; 50890331Sgreen if ((prevnum > 0) == (num > 0) && num / mult == prevnum) 50989788Sgreen break; 51089788Sgreenerange: 51189788Sgreen errx(1, "%s: %s", oper, strerror(ERANGE)); 51289788Sgreen default: 51389788Sgreen errx(1, "%s: illegal numeric value", oper); 51489788Sgreen } 51589788Sgreen return (num); 51651208Sgreen} 517