1133359Sobrien/* 2133359Sobrien * Copyright (c) Christos Zoulas 2003. 3133359Sobrien * All Rights Reserved. 4191736Sobrien * 5133359Sobrien * Redistribution and use in source and binary forms, with or without 6133359Sobrien * modification, are permitted provided that the following conditions 7133359Sobrien * are met: 8133359Sobrien * 1. Redistributions of source code must retain the above copyright 9133359Sobrien * notice immediately at the beginning of the file, without modification, 10133359Sobrien * this list of conditions, and the following disclaimer. 11133359Sobrien * 2. Redistributions in binary form must reproduce the above copyright 12133359Sobrien * notice, this list of conditions and the following disclaimer in the 13133359Sobrien * documentation and/or other materials provided with the distribution. 14191736Sobrien * 15133359Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16133359Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17133359Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18133359Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 19133359Sobrien * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20133359Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21133359Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22133359Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23133359Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24133359Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25133359Sobrien * SUCH DAMAGE. 26133359Sobrien */ 27133359Sobrien#include "file.h" 28191736Sobrien 29191736Sobrien#ifndef lint 30328875SeadlerFILE_RCSID("@(#)$File: funcs.c,v 1.93 2017/08/28 13:39:18 christos Exp $") 31191736Sobrien#endif /* lint */ 32191736Sobrien 33133359Sobrien#include "magic.h" 34267843Sdelphij#include <assert.h> 35133359Sobrien#include <stdarg.h> 36133359Sobrien#include <stdlib.h> 37133359Sobrien#include <string.h> 38133359Sobrien#include <ctype.h> 39159764Sobrien#if defined(HAVE_WCHAR_H) 40159764Sobrien#include <wchar.h> 41159764Sobrien#endif 42169942Sobrien#if defined(HAVE_WCTYPE_H) 43169942Sobrien#include <wctype.h> 44169942Sobrien#endif 45169962Sobrien#if defined(HAVE_LIMITS_H) 46169962Sobrien#include <limits.h> 47169962Sobrien#endif 48133359Sobrien 49186690Sobrien#ifndef SIZE_MAX 50186690Sobrien#define SIZE_MAX ((size_t)~0) 51159764Sobrien#endif 52159764Sobrien 53133359Sobrien/* 54186690Sobrien * Like printf, only we append to a buffer. 55133359Sobrien */ 56133359Sobrienprotected int 57186690Sobrienfile_vprintf(struct magic_set *ms, const char *fmt, va_list ap) 58133359Sobrien{ 59186690Sobrien int len; 60186690Sobrien char *buf, *newstr; 61133359Sobrien 62267843Sdelphij if (ms->event_flags & EVENT_HAD_ERR) 63267843Sdelphij return 0; 64186690Sobrien len = vasprintf(&buf, fmt, ap); 65186690Sobrien if (len < 0) 66175296Sobrien goto out; 67169962Sobrien 68186690Sobrien if (ms->o.buf != NULL) { 69186690Sobrien len = asprintf(&newstr, "%s%s", ms->o.buf, buf); 70186690Sobrien free(buf); 71186690Sobrien if (len < 0) 72175296Sobrien goto out; 73186690Sobrien free(ms->o.buf); 74186690Sobrien buf = newstr; 75133359Sobrien } 76186690Sobrien ms->o.buf = buf; 77133359Sobrien return 0; 78175296Sobrienout: 79328875Seadler fprintf(stderr, "vasprintf failed (%s)", strerror(errno)); 80175296Sobrien return -1; 81133359Sobrien} 82133359Sobrien 83186690Sobrienprotected int 84186690Sobrienfile_printf(struct magic_set *ms, const char *fmt, ...) 85186690Sobrien{ 86186690Sobrien int rv; 87186690Sobrien va_list ap; 88186690Sobrien 89186690Sobrien va_start(ap, fmt); 90186690Sobrien rv = file_vprintf(ms, fmt, ap); 91186690Sobrien va_end(ap); 92186690Sobrien return rv; 93186690Sobrien} 94186690Sobrien 95133359Sobrien/* 96133359Sobrien * error - print best error message possible 97133359Sobrien */ 98133359Sobrien/*VARARGS*/ 99267843Sdelphij__attribute__((__format__(__printf__, 3, 0))) 100169962Sobrienprivate void 101169962Sobrienfile_error_core(struct magic_set *ms, int error, const char *f, va_list va, 102226048Sobrien size_t lineno) 103133359Sobrien{ 104133359Sobrien /* Only the first error is ok */ 105191736Sobrien if (ms->event_flags & EVENT_HAD_ERR) 106133359Sobrien return; 107169962Sobrien if (lineno != 0) { 108186690Sobrien free(ms->o.buf); 109186690Sobrien ms->o.buf = NULL; 110290152Sdelphij file_printf(ms, "line %" SIZE_T_FORMAT "u:", lineno); 111169962Sobrien } 112290152Sdelphij if (ms->o.buf && *ms->o.buf) 113290152Sdelphij file_printf(ms, " "); 114191736Sobrien file_vprintf(ms, f, va); 115186690Sobrien if (error > 0) 116186690Sobrien file_printf(ms, " (%s)", strerror(error)); 117191736Sobrien ms->event_flags |= EVENT_HAD_ERR; 118133359Sobrien ms->error = error; 119133359Sobrien} 120133359Sobrien 121169962Sobrien/*VARARGS*/ 122169962Sobrienprotected void 123169962Sobrienfile_error(struct magic_set *ms, int error, const char *f, ...) 124169962Sobrien{ 125169962Sobrien va_list va; 126169962Sobrien va_start(va, f); 127169962Sobrien file_error_core(ms, error, f, va, 0); 128169962Sobrien va_end(va); 129169962Sobrien} 130133359Sobrien 131169962Sobrien/* 132169962Sobrien * Print an error with magic line number. 133169962Sobrien */ 134169962Sobrien/*VARARGS*/ 135133359Sobrienprotected void 136169962Sobrienfile_magerror(struct magic_set *ms, const char *f, ...) 137169962Sobrien{ 138169962Sobrien va_list va; 139169962Sobrien va_start(va, f); 140169962Sobrien file_error_core(ms, 0, f, va, ms->line); 141169962Sobrien va_end(va); 142169962Sobrien} 143169962Sobrien 144169962Sobrienprotected void 145169942Sobrienfile_oomem(struct magic_set *ms, size_t len) 146133359Sobrien{ 147226048Sobrien file_error(ms, errno, "cannot allocate %" SIZE_T_FORMAT "u bytes", 148226048Sobrien len); 149133359Sobrien} 150133359Sobrien 151133359Sobrienprotected void 152133359Sobrienfile_badseek(struct magic_set *ms) 153133359Sobrien{ 154133359Sobrien file_error(ms, errno, "error seeking"); 155133359Sobrien} 156133359Sobrien 157133359Sobrienprotected void 158133359Sobrienfile_badread(struct magic_set *ms) 159133359Sobrien{ 160133359Sobrien file_error(ms, errno, "error reading"); 161133359Sobrien} 162133359Sobrien 163133359Sobrien#ifndef COMPILE_ONLY 164284778Sdelphij 165284778Sdelphijstatic int 166284778Sdelphijcheckdone(struct magic_set *ms, int *rv) 167284778Sdelphij{ 168284778Sdelphij if ((ms->flags & MAGIC_CONTINUE) == 0) 169284778Sdelphij return 1; 170284778Sdelphij if (file_printf(ms, "\n- ") == -1) 171284778Sdelphij *rv = -1; 172284778Sdelphij return 0; 173284778Sdelphij} 174284778Sdelphij 175284778Sdelphij/*ARGSUSED*/ 176133359Sobrienprotected int 177284778Sdelphijfile_buffer(struct magic_set *ms, int fd, const char *inname __attribute__ ((__unused__)), 178226048Sobrien const void *buf, size_t nb) 179133359Sobrien{ 180191736Sobrien int m = 0, rv = 0, looks_text = 0; 181186690Sobrien const unsigned char *ubuf = CAST(const unsigned char *, buf); 182191736Sobrien unichar *u8buf = NULL; 183191736Sobrien size_t ulen; 184191736Sobrien const char *code = NULL; 185191736Sobrien const char *code_mime = "binary"; 186267843Sdelphij const char *type = "application/octet-stream"; 187267843Sdelphij const char *def = "data"; 188267843Sdelphij const char *ftype = NULL; 189169962Sobrien 190175296Sobrien if (nb == 0) { 191267843Sdelphij def = "empty"; 192267843Sdelphij type = "application/x-empty"; 193267843Sdelphij goto simple; 194175296Sobrien } else if (nb == 1) { 195267843Sdelphij def = "very short file (no magic)"; 196267843Sdelphij goto simple; 197175296Sobrien } 198175296Sobrien 199191736Sobrien if ((ms->flags & MAGIC_NO_CHECK_ENCODING) == 0) { 200191736Sobrien looks_text = file_encoding(ms, ubuf, nb, &u8buf, &ulen, 201267843Sdelphij &code, &code_mime, &ftype); 202191736Sobrien } 203191736Sobrien 204169962Sobrien#ifdef __EMX__ 205175296Sobrien if ((ms->flags & MAGIC_NO_CHECK_APPTYPE) == 0 && inname) { 206290152Sdelphij m = file_os2_apptype(ms, inname, buf, nb); 207290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 208290152Sdelphij (void)fprintf(stderr, "[try os2_apptype %d]\n", m); 209290152Sdelphij switch (m) { 210175296Sobrien case -1: 211175296Sobrien return -1; 212175296Sobrien case 0: 213175296Sobrien break; 214175296Sobrien default: 215175296Sobrien return 1; 216175296Sobrien } 217169962Sobrien } 218169962Sobrien#endif 219226048Sobrien#if HAVE_FORK 220175296Sobrien /* try compression stuff */ 221290152Sdelphij if ((ms->flags & MAGIC_NO_CHECK_COMPRESS) == 0) { 222290152Sdelphij m = file_zmagic(ms, fd, inname, ubuf, nb); 223290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 224290152Sdelphij (void)fprintf(stderr, "[try zmagic %d]\n", m); 225290152Sdelphij if (m) { 226267843Sdelphij goto done_encoding; 227133359Sobrien } 228290152Sdelphij } 229226048Sobrien#endif 230191736Sobrien /* Check if we have a tar file */ 231290152Sdelphij if ((ms->flags & MAGIC_NO_CHECK_TAR) == 0) { 232290152Sdelphij m = file_is_tar(ms, ubuf, nb); 233290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 234290152Sdelphij (void)fprintf(stderr, "[try tar %d]\n", m); 235290152Sdelphij if (m) { 236284778Sdelphij if (checkdone(ms, &rv)) 237284778Sdelphij goto done; 238191736Sobrien } 239290152Sdelphij } 240191736Sobrien 241191736Sobrien /* Check if we have a CDF file */ 242290152Sdelphij if ((ms->flags & MAGIC_NO_CHECK_CDF) == 0) { 243290152Sdelphij m = file_trycdf(ms, fd, ubuf, nb); 244290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 245290152Sdelphij (void)fprintf(stderr, "[try cdf %d]\n", m); 246290152Sdelphij if (m) { 247284778Sdelphij if (checkdone(ms, &rv)) 248284778Sdelphij goto done; 249191736Sobrien } 250290152Sdelphij } 251191736Sobrien 252191736Sobrien /* try soft magic tests */ 253309848Sdelphij if ((ms->flags & MAGIC_NO_CHECK_SOFT) == 0) { 254300899Sdelphij m = file_softmagic(ms, ubuf, nb, NULL, NULL, BINTEST, 255300899Sdelphij looks_text); 256290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 257290152Sdelphij (void)fprintf(stderr, "[try softmagic %d]\n", m); 258290152Sdelphij if (m) { 259169962Sobrien#ifdef BUILTIN_ELF 260191736Sobrien if ((ms->flags & MAGIC_NO_CHECK_ELF) == 0 && m == 1 && 261191736Sobrien nb > 5 && fd != -1) { 262191736Sobrien /* 263191736Sobrien * We matched something in the file, so this 264191736Sobrien * *might* be an ELF file, and the file is at 265191736Sobrien * least 5 bytes long, so if it's an ELF file 266191736Sobrien * it has at least one byte past the ELF magic 267191736Sobrien * number - try extracting information from the 268191736Sobrien * ELF headers that cannot easily * be 269191736Sobrien * extracted with rules in the magic file. 270191736Sobrien */ 271290152Sdelphij m = file_tryelf(ms, fd, ubuf, nb); 272290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 273290152Sdelphij (void)fprintf(stderr, "[try elf %d]\n", 274290152Sdelphij m); 275191736Sobrien } 276191736Sobrien#endif 277284778Sdelphij if (checkdone(ms, &rv)) 278284778Sdelphij goto done; 279191736Sobrien } 280309848Sdelphij } 281191736Sobrien 282234250Sobrien /* try text properties */ 283191736Sobrien if ((ms->flags & MAGIC_NO_CHECK_TEXT) == 0) { 284191736Sobrien 285290152Sdelphij m = file_ascmagic(ms, ubuf, nb, looks_text); 286290152Sdelphij if ((ms->flags & MAGIC_DEBUG) != 0) 287290152Sdelphij (void)fprintf(stderr, "[try ascmagic %d]\n", m); 288290152Sdelphij if (m) { 289284778Sdelphij if (checkdone(ms, &rv)) 290284778Sdelphij goto done; 291191736Sobrien } 292175296Sobrien } 293191736Sobrien 294267843Sdelphijsimple: 295191736Sobrien /* give up */ 296191736Sobrien m = 1; 297300899Sdelphij if (ms->flags & MAGIC_MIME) { 298300899Sdelphij if ((ms->flags & MAGIC_MIME_TYPE) && 299300899Sdelphij file_printf(ms, "%s", type) == -1) 300300899Sdelphij rv = -1; 301300899Sdelphij } else if (ms->flags & MAGIC_APPLE) { 302300899Sdelphij if (file_printf(ms, "UNKNUNKN") == -1) 303300899Sdelphij rv = -1; 304300899Sdelphij } else if (ms->flags & MAGIC_EXTENSION) { 305300899Sdelphij if (file_printf(ms, "???") == -1) 306300899Sdelphij rv = -1; 307300899Sdelphij } else { 308300899Sdelphij if (file_printf(ms, "%s", def) == -1) 309300899Sdelphij rv = -1; 310191736Sobrien } 311191736Sobrien done: 312191736Sobrien if ((ms->flags & MAGIC_MIME_ENCODING) != 0) { 313191736Sobrien if (ms->flags & MAGIC_MIME_TYPE) 314191736Sobrien if (file_printf(ms, "; charset=") == -1) 315191736Sobrien rv = -1; 316191736Sobrien if (file_printf(ms, "%s", code_mime) == -1) 317191736Sobrien rv = -1; 318191736Sobrien } 319267843Sdelphij#if HAVE_FORK 320267843Sdelphij done_encoding: 321267843Sdelphij#endif 322234250Sobrien free(u8buf); 323191736Sobrien if (rv) 324191736Sobrien return rv; 325191736Sobrien 326175296Sobrien return m; 327133359Sobrien} 328133359Sobrien#endif 329133359Sobrien 330133359Sobrienprotected int 331328875Seadlerfile_reset(struct magic_set *ms, int checkloaded) 332133359Sobrien{ 333328875Seadler if (checkloaded && ms->mlist[0] == NULL) { 334133359Sobrien file_error(ms, 0, "no magic files loaded"); 335133359Sobrien return -1; 336133359Sobrien } 337192348Sdelphij if (ms->o.buf) { 338192348Sdelphij free(ms->o.buf); 339192348Sdelphij ms->o.buf = NULL; 340192348Sdelphij } 341192348Sdelphij if (ms->o.pbuf) { 342192348Sdelphij free(ms->o.pbuf); 343192348Sdelphij ms->o.pbuf = NULL; 344192348Sdelphij } 345191736Sobrien ms->event_flags &= ~EVENT_HAD_ERR; 346133359Sobrien ms->error = -1; 347133359Sobrien return 0; 348133359Sobrien} 349133359Sobrien 350159764Sobrien#define OCTALIFY(n, o) \ 351169942Sobrien /*LINTED*/ \ 352169942Sobrien (void)(*(n)++ = '\\', \ 353159764Sobrien *(n)++ = (((uint32_t)*(o) >> 6) & 3) + '0', \ 354159764Sobrien *(n)++ = (((uint32_t)*(o) >> 3) & 7) + '0', \ 355159764Sobrien *(n)++ = (((uint32_t)*(o) >> 0) & 7) + '0', \ 356169942Sobrien (o)++) 357159764Sobrien 358133359Sobrienprotected const char * 359133359Sobrienfile_getbuffer(struct magic_set *ms) 360133359Sobrien{ 361169962Sobrien char *pbuf, *op, *np; 362169962Sobrien size_t psize, len; 363133359Sobrien 364191736Sobrien if (ms->event_flags & EVENT_HAD_ERR) 365133359Sobrien return NULL; 366133359Sobrien 367133359Sobrien if (ms->flags & MAGIC_RAW) 368133359Sobrien return ms->o.buf; 369133359Sobrien 370191736Sobrien if (ms->o.buf == NULL) 371191736Sobrien return NULL; 372191736Sobrien 373169962Sobrien /* * 4 is for octal representation, + 1 is for NUL */ 374186690Sobrien len = strlen(ms->o.buf); 375186690Sobrien if (len > (SIZE_MAX - 1) / 4) { 376169962Sobrien file_oomem(ms, len); 377169962Sobrien return NULL; 378169962Sobrien } 379169962Sobrien psize = len * 4 + 1; 380186690Sobrien if ((pbuf = CAST(char *, realloc(ms->o.pbuf, psize))) == NULL) { 381186690Sobrien file_oomem(ms, psize); 382186690Sobrien return NULL; 383133359Sobrien } 384186690Sobrien ms->o.pbuf = pbuf; 385133359Sobrien 386159764Sobrien#if defined(HAVE_WCHAR_H) && defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH) 387159764Sobrien { 388159764Sobrien mbstate_t state; 389159764Sobrien wchar_t nextchar; 390159764Sobrien int mb_conv = 1; 391159764Sobrien size_t bytesconsumed; 392159764Sobrien char *eop; 393159764Sobrien (void)memset(&state, 0, sizeof(mbstate_t)); 394159764Sobrien 395159764Sobrien np = ms->o.pbuf; 396159764Sobrien op = ms->o.buf; 397186690Sobrien eop = op + len; 398159764Sobrien 399159764Sobrien while (op < eop) { 400169942Sobrien bytesconsumed = mbrtowc(&nextchar, op, 401169942Sobrien (size_t)(eop - op), &state); 402159764Sobrien if (bytesconsumed == (size_t)(-1) || 403159764Sobrien bytesconsumed == (size_t)(-2)) { 404159764Sobrien mb_conv = 0; 405159764Sobrien break; 406159764Sobrien } 407159764Sobrien 408169942Sobrien if (iswprint(nextchar)) { 409159764Sobrien (void)memcpy(np, op, bytesconsumed); 410159764Sobrien op += bytesconsumed; 411159764Sobrien np += bytesconsumed; 412159764Sobrien } else { 413159764Sobrien while (bytesconsumed-- > 0) 414159764Sobrien OCTALIFY(np, op); 415159764Sobrien } 416159764Sobrien } 417159764Sobrien *np = '\0'; 418159764Sobrien 419159764Sobrien /* Parsing succeeded as a multi-byte sequence */ 420159764Sobrien if (mb_conv != 0) 421159764Sobrien return ms->o.pbuf; 422159764Sobrien } 423159764Sobrien#endif 424159764Sobrien 425226048Sobrien for (np = ms->o.pbuf, op = ms->o.buf; *op;) { 426133359Sobrien if (isprint((unsigned char)*op)) { 427226048Sobrien *np++ = *op++; 428133359Sobrien } else { 429159764Sobrien OCTALIFY(np, op); 430133359Sobrien } 431133359Sobrien } 432133359Sobrien *np = '\0'; 433133359Sobrien return ms->o.pbuf; 434133359Sobrien} 435159764Sobrien 436169962Sobrienprotected int 437169962Sobrienfile_check_mem(struct magic_set *ms, unsigned int level) 438169962Sobrien{ 439169962Sobrien size_t len; 440169962Sobrien 441169962Sobrien if (level >= ms->c.len) { 442284778Sdelphij len = (ms->c.len = 20 + level) * sizeof(*ms->c.li); 443186690Sobrien ms->c.li = CAST(struct level_info *, (ms->c.li == NULL) ? 444186690Sobrien malloc(len) : 445186690Sobrien realloc(ms->c.li, len)); 446169962Sobrien if (ms->c.li == NULL) { 447169962Sobrien file_oomem(ms, len); 448169962Sobrien return -1; 449169962Sobrien } 450169962Sobrien } 451169962Sobrien ms->c.li[level].got_match = 0; 452169962Sobrien#ifdef ENABLE_CONDITIONALS 453169962Sobrien ms->c.li[level].last_match = 0; 454169962Sobrien ms->c.li[level].last_cond = COND_NONE; 455169962Sobrien#endif /* ENABLE_CONDITIONALS */ 456169962Sobrien return 0; 457169962Sobrien} 458226048Sobrien 459226048Sobrienprotected size_t 460226048Sobrienfile_printedlen(const struct magic_set *ms) 461226048Sobrien{ 462226048Sobrien return ms->o.buf == NULL ? 0 : strlen(ms->o.buf); 463226048Sobrien} 464226048Sobrien 465226048Sobrienprotected int 466226048Sobrienfile_replace(struct magic_set *ms, const char *pat, const char *rep) 467226048Sobrien{ 468267843Sdelphij file_regex_t rx; 469267843Sdelphij int rc, rv = -1; 470226048Sobrien 471267843Sdelphij rc = file_regcomp(&rx, pat, REG_EXTENDED); 472226048Sobrien if (rc) { 473267843Sdelphij file_regerror(&rx, rc, ms); 474226048Sobrien } else { 475226048Sobrien regmatch_t rm; 476226048Sobrien int nm = 0; 477267843Sdelphij while (file_regexec(&rx, ms->o.buf, 1, &rm, 0) == 0) { 478226048Sobrien ms->o.buf[rm.rm_so] = '\0'; 479226048Sobrien if (file_printf(ms, "%s%s", rep, 480226048Sobrien rm.rm_eo != 0 ? ms->o.buf + rm.rm_eo : "") == -1) 481267843Sdelphij goto out; 482226048Sobrien nm++; 483226048Sobrien } 484267843Sdelphij rv = nm; 485226048Sobrien } 486267843Sdelphijout: 487267843Sdelphij file_regfree(&rx); 488267843Sdelphij return rv; 489226048Sobrien} 490267843Sdelphij 491267843Sdelphijprotected int 492267843Sdelphijfile_regcomp(file_regex_t *rx, const char *pat, int flags) 493267843Sdelphij{ 494276415Sdelphij#ifdef USE_C_LOCALE 495276415Sdelphij rx->c_lc_ctype = newlocale(LC_CTYPE_MASK, "C", 0); 496276415Sdelphij assert(rx->c_lc_ctype != NULL); 497276415Sdelphij rx->old_lc_ctype = uselocale(rx->c_lc_ctype); 498267843Sdelphij assert(rx->old_lc_ctype != NULL); 499300899Sdelphij#else 500300899Sdelphij rx->old_lc_ctype = setlocale(LC_CTYPE, "C"); 501276415Sdelphij#endif 502267843Sdelphij rx->pat = pat; 503267843Sdelphij 504267843Sdelphij return rx->rc = regcomp(&rx->rx, pat, flags); 505267843Sdelphij} 506267843Sdelphij 507267843Sdelphijprotected int 508267843Sdelphijfile_regexec(file_regex_t *rx, const char *str, size_t nmatch, 509267843Sdelphij regmatch_t* pmatch, int eflags) 510267843Sdelphij{ 511267843Sdelphij assert(rx->rc == 0); 512328875Seadler /* XXX: force initialization because glibc does not always do this */ 513328875Seadler memset(pmatch, 0, nmatch * sizeof(*pmatch)); 514267843Sdelphij return regexec(&rx->rx, str, nmatch, pmatch, eflags); 515267843Sdelphij} 516267843Sdelphij 517267843Sdelphijprotected void 518267843Sdelphijfile_regfree(file_regex_t *rx) 519267843Sdelphij{ 520267843Sdelphij if (rx->rc == 0) 521267843Sdelphij regfree(&rx->rx); 522276415Sdelphij#ifdef USE_C_LOCALE 523276415Sdelphij (void)uselocale(rx->old_lc_ctype); 524276415Sdelphij freelocale(rx->c_lc_ctype); 525300899Sdelphij#else 526300899Sdelphij (void)setlocale(LC_CTYPE, rx->old_lc_ctype); 527276415Sdelphij#endif 528267843Sdelphij} 529267843Sdelphij 530267843Sdelphijprotected void 531267843Sdelphijfile_regerror(file_regex_t *rx, int rc, struct magic_set *ms) 532267843Sdelphij{ 533267843Sdelphij char errmsg[512]; 534267843Sdelphij 535267843Sdelphij (void)regerror(rc, &rx->rx, errmsg, sizeof(errmsg)); 536267843Sdelphij file_magerror(ms, "regex error %d for `%s', (%s)", rc, rx->pat, 537267843Sdelphij errmsg); 538267843Sdelphij} 539275668Sdelphij 540275668Sdelphijprotected file_pushbuf_t * 541275668Sdelphijfile_push_buffer(struct magic_set *ms) 542275668Sdelphij{ 543275668Sdelphij file_pushbuf_t *pb; 544275668Sdelphij 545275668Sdelphij if (ms->event_flags & EVENT_HAD_ERR) 546275668Sdelphij return NULL; 547275668Sdelphij 548275668Sdelphij if ((pb = (CAST(file_pushbuf_t *, malloc(sizeof(*pb))))) == NULL) 549275668Sdelphij return NULL; 550275668Sdelphij 551275668Sdelphij pb->buf = ms->o.buf; 552275668Sdelphij pb->offset = ms->offset; 553275668Sdelphij 554275668Sdelphij ms->o.buf = NULL; 555275668Sdelphij ms->offset = 0; 556275668Sdelphij 557275668Sdelphij return pb; 558275668Sdelphij} 559275668Sdelphij 560275668Sdelphijprotected char * 561275668Sdelphijfile_pop_buffer(struct magic_set *ms, file_pushbuf_t *pb) 562275668Sdelphij{ 563275668Sdelphij char *rbuf; 564275668Sdelphij 565275668Sdelphij if (ms->event_flags & EVENT_HAD_ERR) { 566275668Sdelphij free(pb->buf); 567275668Sdelphij free(pb); 568275668Sdelphij return NULL; 569275668Sdelphij } 570275668Sdelphij 571275668Sdelphij rbuf = ms->o.buf; 572275668Sdelphij 573275668Sdelphij ms->o.buf = pb->buf; 574275668Sdelphij ms->offset = pb->offset; 575275668Sdelphij 576275668Sdelphij free(pb); 577275668Sdelphij return rbuf; 578275668Sdelphij} 579277592Sdelphij 580277592Sdelphij/* 581277592Sdelphij * convert string to ascii printable format. 582277592Sdelphij */ 583277592Sdelphijprotected char * 584277592Sdelphijfile_printable(char *buf, size_t bufsiz, const char *str) 585277592Sdelphij{ 586277592Sdelphij char *ptr, *eptr; 587277592Sdelphij const unsigned char *s = (const unsigned char *)str; 588277592Sdelphij 589277592Sdelphij for (ptr = buf, eptr = ptr + bufsiz - 1; ptr < eptr && *s; s++) { 590277592Sdelphij if (isprint(*s)) { 591277592Sdelphij *ptr++ = *s; 592277592Sdelphij continue; 593277592Sdelphij } 594277592Sdelphij if (ptr >= eptr - 3) 595277592Sdelphij break; 596277592Sdelphij *ptr++ = '\\'; 597284778Sdelphij *ptr++ = ((CAST(unsigned int, *s) >> 6) & 7) + '0'; 598284778Sdelphij *ptr++ = ((CAST(unsigned int, *s) >> 3) & 7) + '0'; 599284778Sdelphij *ptr++ = ((CAST(unsigned int, *s) >> 0) & 7) + '0'; 600277592Sdelphij } 601277592Sdelphij *ptr = '\0'; 602277592Sdelphij return buf; 603277592Sdelphij} 604