1/* $NetBSD: xlint.c,v 1.36 2005/02/09 21:24:48 dsl Exp $ */ 2 3/* 4 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 5 * Copyright (c) 1994, 1995 Jochen Pohl 6 * All Rights Reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Jochen Pohl for 19 * The NetBSD Project. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35#include <sys/cdefs.h> 36#if defined(__RCSID) && !defined(lint) 37__RCSID("$NetBSD: xlint.c,v 1.36 2005/02/09 21:24:48 dsl Exp $"); 38#endif 39__FBSDID("$FreeBSD$"); 40 41#include <sys/param.h> 42#include <sys/wait.h> 43#include <sys/stat.h> 44#include <sys/utsname.h> 45#include <err.h> 46#include <errno.h> 47#include <fcntl.h> 48#include <paths.h> 49#include <signal.h> 50#include <stdio.h> 51#include <stdlib.h> 52#include <string.h> 53#include <unistd.h> 54 55#include "lint.h" 56#include "pathnames.h" 57 58#define DEFAULT_PATH _PATH_DEFPATH 59 60int main(int, char *[]); 61 62/* directory for temporary files */ 63static const char *tmpdir; 64 65/* path name for cpp output */ 66static char *cppout; 67 68/* file descriptor for cpp output */ 69static int cppoutfd = -1; 70 71/* files created by 1st pass */ 72static char **p1out; 73 74/* input files for 2nd pass (without libraries) */ 75static char **p2in; 76 77/* library which will be created by 2nd pass */ 78static char *p2out; 79 80/* flags always passed to cc(1) */ 81static char **cflags; 82 83/* flags for cc(1), controlled by sflag/tflag */ 84static char **lcflags; 85 86/* flags for lint1 */ 87static char **l1flags; 88 89/* flags for lint2 */ 90static char **l2flags; 91 92/* libraries for lint2 */ 93static char **l2libs; 94 95/* default libraries */ 96static char **deflibs; 97 98/* additional libraries */ 99static char **libs; 100 101/* search path for libraries */ 102static char **libsrchpath; 103 104static char *libexec_path; 105 106/* flags */ 107static int iflag, oflag, Cflag, sflag, tflag, Fflag, dflag, Bflag, Sflag; 108 109/* print the commands executed to run the stages of compilation */ 110static int Vflag; 111 112/* filename for oflag */ 113static char *outputfn; 114 115/* reset after first .c source has been processed */ 116static int first = 1; 117 118/* 119 * name of a file which is currently written by a child and should 120 * be removed after abnormal termination of the child 121 */ 122static const char *currfn; 123 124#if !defined(TARGET_PREFIX) 125#define TARGET_PREFIX "" 126#endif 127static const char target_prefix[] = TARGET_PREFIX; 128 129static void appstrg(char ***, char *); 130static void appcstrg(char ***, const char *); 131static void applst(char ***, char *const *); 132static void freelst(char ***); 133static char *concat2(const char *, const char *); 134static char *concat3(const char *, const char *, const char *); 135static void terminate(int) __attribute__((__noreturn__)); 136static const char *lbasename(const char *, int); 137static void appdef(char ***, const char *); 138static void usage(void) __dead2; 139static void fname(const char *); 140static void runchild(const char *, char *const *, const char *, int); 141static void findlibs(char *const *); 142static int rdok(const char *); 143static void lint2(void); 144static void cat(char *const *, const char *); 145 146/* 147 * Some functions to deal with lists of strings. 148 * Take care that we get no surprises in case of asynchronous signals. 149 */ 150static void 151appstrg(char ***lstp, char *s) 152{ 153 char **lst, **olst; 154 int i; 155 156 olst = *lstp; 157 for (i = 0; olst[i] != NULL; i++) 158 continue; 159 lst = xrealloc(olst, (i + 2) * sizeof (char *)); 160 lst[i] = s; 161 lst[i + 1] = NULL; 162 *lstp = lst; 163} 164 165static void 166appcstrg(char ***lstp, const char *s) 167{ 168 169 appstrg(lstp, xstrdup(s)); 170} 171 172static void 173applst(char ***destp, char *const *src) 174{ 175 int i, k; 176 char **dest, **odest; 177 178 odest = *destp; 179 for (i = 0; odest[i] != NULL; i++) 180 continue; 181 for (k = 0; src[k] != NULL; k++) 182 continue; 183 dest = xrealloc(odest, (i + k + 1) * sizeof (char *)); 184 for (k = 0; src[k] != NULL; k++) 185 dest[i + k] = xstrdup(src[k]); 186 dest[i + k] = NULL; 187 *destp = dest; 188} 189 190static void 191freelst(char ***lstp) 192{ 193 char *s; 194 int i; 195 196 for (i = 0; (*lstp)[i] != NULL; i++) 197 continue; 198 while (i-- > 0) { 199 s = (*lstp)[i]; 200 (*lstp)[i] = NULL; 201 free(s); 202 } 203} 204 205static char * 206concat2(const char *s1, const char *s2) 207{ 208 char *s; 209 210 s = xmalloc(strlen(s1) + strlen(s2) + 1); 211 (void)strcpy(s, s1); 212 (void)strcat(s, s2); 213 214 return (s); 215} 216 217static char * 218concat3(const char *s1, const char *s2, const char *s3) 219{ 220 char *s; 221 222 s = xmalloc(strlen(s1) + strlen(s2) + strlen(s3) + 1); 223 (void)strcpy(s, s1); 224 (void)strcat(s, s2); 225 (void)strcat(s, s3); 226 227 return (s); 228} 229 230/* 231 * Clean up after a signal. 232 */ 233static void 234terminate(int signo) 235{ 236 int i; 237 238 if (cppoutfd != -1) 239 (void)close(cppoutfd); 240 if (cppout != NULL) 241 (void)remove(cppout); 242 243 if (p1out != NULL) { 244 for (i = 0; p1out[i] != NULL; i++) 245 (void)remove(p1out[i]); 246 } 247 248 if (p2out != NULL) 249 (void)remove(p2out); 250 251 if (currfn != NULL) 252 (void)remove(currfn); 253 254 exit(signo != 0 ? 1 : 0); 255} 256 257/* 258 * Returns a pointer to the last component of strg after delim. 259 * Returns strg if the string does not contain delim. 260 */ 261static const char * 262lbasename(const char *strg, int delim) 263{ 264 const char *cp, *cp1, *cp2; 265 266 cp = cp1 = cp2 = strg; 267 while (*cp != '\0') { 268 if (*cp++ == delim) { 269 cp2 = cp1; 270 cp1 = cp; 271 } 272 } 273 return (*cp1 == '\0' ? cp2 : cp1); 274} 275 276static void 277appdef(char ***lstp, const char *def) 278{ 279 280 appstrg(lstp, concat2("-D__", def)); 281 appstrg(lstp, concat3("-D__", def, "__")); 282} 283 284static void 285usage(void) 286{ 287 288 (void)fprintf(stderr, 289 "usage: lint [-abceghprvwxzHFS] [-s|-t] [-i|-nu] [-Dname[=def]]" 290 " [-Uname] [-X <id>[,<id>]...\n"); 291 (void)fprintf(stderr, 292 "\t[-Idirectory] [-Ldirectory] [-llibrary] [-ooutputfile]" 293 " file...\n"); 294 (void)fprintf(stderr, 295 " lint [-abceghprvwzHFS] [-s|-t] -Clibrary [-Dname[=def]]\n" 296 " [-X <id>[,<id>]...\n"); 297 (void)fprintf(stderr, "\t[-Idirectory] [-Uname] [-Bpath] file" 298 " ...\n"); 299 terminate(-1); 300} 301 302 303int 304main(int argc, char *argv[]) 305{ 306 int c; 307 char flgbuf[3], *s; 308 const char *tmp; 309 size_t len; 310 311 if ((tmp = getenv("TMPDIR")) == NULL || (len = strlen(tmp)) == 0) { 312 tmpdir = _PATH_TMP; 313 } else { 314 s = xmalloc(len + 2); 315 (void)sprintf(s, "%s%s", tmp, tmp[len - 1] == '/' ? "" : "/"); 316 tmpdir = s; 317 } 318 319 cppout = xmalloc(strlen(tmpdir) + sizeof ("lint0.XXXXXX")); 320 (void)sprintf(cppout, "%slint0.XXXXXX", tmpdir); 321 cppoutfd = mkstemp(cppout); 322 if (cppoutfd == -1) { 323 warn("can't make temp"); 324 terminate(-1); 325 } 326 327 p1out = xcalloc(1, sizeof (char *)); 328 p2in = xcalloc(1, sizeof (char *)); 329 cflags = xcalloc(1, sizeof (char *)); 330 lcflags = xcalloc(1, sizeof (char *)); 331 l1flags = xcalloc(1, sizeof (char *)); 332 l2flags = xcalloc(1, sizeof (char *)); 333 l2libs = xcalloc(1, sizeof (char *)); 334 deflibs = xcalloc(1, sizeof (char *)); 335 libs = xcalloc(1, sizeof (char *)); 336 libsrchpath = xcalloc(1, sizeof (char *)); 337 338 appcstrg(&cflags, "-E"); 339 appcstrg(&cflags, "-x"); 340 appcstrg(&cflags, "c"); 341#if 0 342 appcstrg(&cflags, "-D__attribute__(x)="); 343 appcstrg(&cflags, "-D__extension__(x)=/*NOSTRICT*/0"); 344#else 345 appcstrg(&cflags, "-U__GNUC__"); 346 appcstrg(&cflags, "-undef"); 347#endif 348#if 0 349 appcstrg(&cflags, "-Wp,-$"); 350#endif 351 appcstrg(&cflags, "-Wp,-C"); 352 appcstrg(&cflags, "-Wcomment"); 353 appcstrg(&cflags, "-D__LINT__"); 354 appcstrg(&cflags, "-Dlint"); /* XXX don't def. with -s */ 355 356 appdef(&cflags, "lint"); 357 358 appcstrg(&deflibs, "c"); 359 360 if (signal(SIGHUP, terminate) == SIG_IGN) 361 (void)signal(SIGHUP, SIG_IGN); 362 (void)signal(SIGINT, terminate); 363 (void)signal(SIGQUIT, terminate); 364 (void)signal(SIGTERM, terminate); 365 while ((c = getopt(argc, argv, "abcd:eghil:no:prstuvwxzB:C:D:FHI:L:M:SU:VX:")) != -1) { 366 switch (c) { 367 368 case 'a': 369 case 'b': 370 case 'c': 371 case 'e': 372 case 'g': 373 case 'r': 374 case 'v': 375 case 'w': 376 case 'z': 377 (void)sprintf(flgbuf, "-%c", c); 378 appcstrg(&l1flags, flgbuf); 379 break; 380 381 case 'F': 382 Fflag = 1; 383 /* FALLTHROUGH */ 384 case 'u': 385 case 'h': 386 (void)sprintf(flgbuf, "-%c", c); 387 appcstrg(&l1flags, flgbuf); 388 appcstrg(&l2flags, flgbuf); 389 break; 390 391 case 'X': 392 (void)sprintf(flgbuf, "-%c", c); 393 appcstrg(&l1flags, flgbuf); 394 appcstrg(&l1flags, optarg); 395 break; 396 397 case 'i': 398 if (Cflag) 399 usage(); 400 iflag = 1; 401 break; 402 403 case 'n': 404 freelst(&deflibs); 405 break; 406 407 case 'p': 408 appcstrg(&lcflags, "-Wtraditional"); 409 appcstrg(&lcflags, "-Wno-system-headers"); 410 appcstrg(&l1flags, "-p"); 411 appcstrg(&l2flags, "-p"); 412 if (*deflibs != NULL) { 413 freelst(&deflibs); 414 appcstrg(&deflibs, "c"); 415 } 416 break; 417 418 case 's': 419 if (tflag) 420 usage(); 421 freelst(&lcflags); 422 appcstrg(&lcflags, "-trigraphs"); 423 appcstrg(&lcflags, "-Wtrigraphs"); 424 appcstrg(&lcflags, "-pedantic"); 425 appcstrg(&lcflags, "-D__STRICT_ANSI__"); 426 appcstrg(&l1flags, "-s"); 427 appcstrg(&l2flags, "-s"); 428 sflag = 1; 429 break; 430 431 case 'S': 432 if (tflag) 433 usage(); 434 appcstrg(&l1flags, "-S"); 435 Sflag = 1; 436 break; 437 438#if !HAVE_CONFIG_H 439 case 't': 440 if (sflag) 441 usage(); 442 freelst(&lcflags); 443 appcstrg(&lcflags, "-traditional"); 444 appstrg(&lcflags, concat2("-D", MACHINE)); 445 appstrg(&lcflags, concat2("-D", MACHINE_ARCH)); 446 appcstrg(&l1flags, "-t"); 447 appcstrg(&l2flags, "-t"); 448 tflag = 1; 449 break; 450#endif 451 452 case 'x': 453 appcstrg(&l2flags, "-x"); 454 break; 455 456 case 'C': 457 if (Cflag || oflag || iflag) 458 usage(); 459 Cflag = 1; 460 appstrg(&l2flags, concat2("-C", optarg)); 461 p2out = xmalloc(sizeof ("llib-l.ln") + strlen(optarg)); 462 (void)sprintf(p2out, "llib-l%s.ln", optarg); 463 freelst(&deflibs); 464 break; 465 466 case 'd': 467 if (dflag) 468 usage(); 469 dflag = 1; 470 appcstrg(&cflags, "-nostdinc"); 471 appcstrg(&cflags, "-idirafter"); 472 appcstrg(&cflags, optarg); 473 break; 474 475 case 'D': 476 case 'I': 477 case 'M': 478 case 'U': 479 (void)sprintf(flgbuf, "-%c", c); 480 appstrg(&cflags, concat2(flgbuf, optarg)); 481 break; 482 483 case 'l': 484 appcstrg(&libs, optarg); 485 break; 486 487 case 'o': 488 if (Cflag || oflag) 489 usage(); 490 oflag = 1; 491 outputfn = xstrdup(optarg); 492 break; 493 494 case 'L': 495 appcstrg(&libsrchpath, optarg); 496 break; 497 498 case 'H': 499 appcstrg(&l2flags, "-H"); 500 break; 501 502 case 'B': 503 Bflag = 1; 504 libexec_path = xstrdup(optarg); 505 break; 506 507 case 'V': 508 Vflag = 1; 509 break; 510 511 default: 512 usage(); 513 /* NOTREACHED */ 514 } 515 } 516 argc -= optind; 517 argv += optind; 518 519 /* 520 * To avoid modifying getopt(3)'s state engine midstream, we 521 * explicitly accept just a few options after the first source file. 522 * 523 * In particular, only -l<lib> and -L<libdir> (and these with a space 524 * after -l or -L) are allowed. 525 */ 526 while (argc > 0) { 527 const char *arg = argv[0]; 528 529 if (arg[0] == '-') { 530 char ***list; 531 532 /* option */ 533 switch (arg[1]) { 534 case 'l': 535 list = &libs; 536 break; 537 538 case 'L': 539 list = &libsrchpath; 540 break; 541 542 default: 543 usage(); 544 /* NOTREACHED */ 545 } 546 if (arg[2]) 547 appcstrg(list, arg + 2); 548 else if (argc > 1) { 549 argc--; 550 appcstrg(list, *++argv); 551 } else 552 usage(); 553 } else { 554 /* filename */ 555 fname(arg); 556 first = 0; 557 } 558 argc--; 559 argv++; 560 } 561 562 if (first) 563 usage(); 564 565 if (iflag) 566 terminate(0); 567 568 if (!oflag) { 569 if ((tmp = getenv("LIBDIR")) == NULL || strlen(tmp) == 0) 570 tmp = PATH_LINTLIB; 571 appcstrg(&libsrchpath, tmp); 572 findlibs(libs); 573 findlibs(deflibs); 574 } 575 576 (void)printf("Lint pass2:\n"); 577 lint2(); 578 579 if (oflag) 580 cat(p2in, outputfn); 581 582 if (Cflag) 583 p2out = NULL; 584 585 terminate(0); 586 /* NOTREACHED */ 587} 588 589/* 590 * Read a file name from the command line 591 * and pass it through lint1 if it is a C source. 592 */ 593static void 594fname(const char *name) 595{ 596 const char *bn, *suff; 597 char **args, *ofn, *p, *pathname; 598 size_t len; 599 int is_stdin; 600 int fd; 601 602 is_stdin = (strcmp(name, "-") == 0); 603 bn = lbasename(name, '/'); 604 suff = lbasename(bn, '.'); 605 606 if (strcmp(suff, "ln") == 0) { 607 /* only for lint2 */ 608 if (!iflag) 609 appcstrg(&p2in, name); 610 return; 611 } 612 613 if (!is_stdin && strcmp(suff, "c") != 0 && 614 (strncmp(bn, "llib-l", 6) != 0 || bn != suff)) { 615 warnx("unknown file type: %s\n", name); 616 return; 617 } 618 619 if (!iflag || !first) 620 (void)printf("%s:\n", 621 is_stdin ? "{standard input}" : Fflag ? name : bn); 622 623 /* build the name of the output file of lint1 */ 624 if (oflag) { 625 ofn = outputfn; 626 outputfn = NULL; 627 oflag = 0; 628 } else if (iflag) { 629 if (is_stdin) { 630 warnx("-i not supported without -o for standard input"); 631 return; 632 } 633 ofn = xmalloc(strlen(bn) + (bn == suff ? 4 : 2)); 634 len = bn == suff ? strlen(bn) : (size_t)((suff - 1) - bn); 635 (void)sprintf(ofn, "%.*s", (int)len, bn); 636 (void)strcat(ofn, ".ln"); 637 } else { 638 ofn = xmalloc(strlen(tmpdir) + sizeof ("lint1.XXXXXX")); 639 (void)sprintf(ofn, "%slint1.XXXXXX", tmpdir); 640 fd = mkstemp(ofn); 641 if (fd == -1) { 642 warn("can't make temp"); 643 terminate(-1); 644 } 645 close(fd); 646 } 647 if (!iflag) 648 appcstrg(&p1out, ofn); 649 650 args = xcalloc(1, sizeof (char *)); 651 652 /* run cc */ 653 654 if (getenv("CC") == NULL) { 655 pathname = xmalloc(strlen(PATH_USRBIN) + sizeof ("/cc")); 656 (void)sprintf(pathname, "%s/cc", PATH_USRBIN); 657 appcstrg(&args, pathname); 658 } else { 659 pathname = strdup(getenv("CC")); 660 for (p = strtok(pathname, " \t"); p; p = strtok(NULL, " \t")) 661 appcstrg(&args, p); 662 } 663 664 applst(&args, cflags); 665 applst(&args, lcflags); 666 appcstrg(&args, name); 667 668 /* we reuse the same tmp file for cpp output, so rewind and truncate */ 669 if (lseek(cppoutfd, (off_t)0, SEEK_SET) != 0) { 670 warn("lseek"); 671 terminate(-1); 672 } 673 if (ftruncate(cppoutfd, (off_t)0) != 0) { 674 warn("ftruncate"); 675 terminate(-1); 676 } 677 678 runchild(pathname, args, cppout, cppoutfd); 679 free(pathname); 680 freelst(&args); 681 682 /* run lint1 */ 683 684 if (!Bflag) { 685 pathname = xmalloc(strlen(PATH_LIBEXEC) + sizeof ("/lint1") + 686 strlen(target_prefix)); 687 (void)sprintf(pathname, "%s/%slint1", PATH_LIBEXEC, 688 target_prefix); 689 } else { 690 /* 691 * XXX Unclear whether we should be using target_prefix 692 * XXX here. --thorpej@wasabisystems.com 693 */ 694 pathname = xmalloc(strlen(libexec_path) + sizeof ("/lint1")); 695 (void)sprintf(pathname, "%s/lint1", libexec_path); 696 } 697 698 appcstrg(&args, pathname); 699 applst(&args, l1flags); 700 appcstrg(&args, cppout); 701 appcstrg(&args, ofn); 702 703 runchild(pathname, args, ofn, -1); 704 free(pathname); 705 freelst(&args); 706 707 appcstrg(&p2in, ofn); 708 free(ofn); 709 710 free(args); 711} 712 713static void 714runchild(const char *path, char *const *args, const char *crfn, int fdout) 715{ 716 int status, rv, signo, i; 717 718 if (Vflag) { 719 for (i = 0; args[i] != NULL; i++) 720 (void)printf("%s ", args[i]); 721 (void)printf("\n"); 722 } 723 724 currfn = crfn; 725 726 (void)fflush(stdout); 727 728 switch (vfork()) { 729 case -1: 730 warn("cannot fork"); 731 terminate(-1); 732 /* NOTREACHED */ 733 default: 734 /* parent */ 735 break; 736 case 0: 737 /* child */ 738 739 /* setup the standard output if necessary */ 740 if (fdout != -1) { 741 dup2(fdout, STDOUT_FILENO); 742 close(fdout); 743 } 744 (void)execvp(path, args); 745 warn("cannot exec %s", path); 746 _exit(1); 747 /* NOTREACHED */ 748 } 749 750 while ((rv = wait(&status)) == -1 && errno == EINTR) ; 751 if (rv == -1) { 752 warn("wait"); 753 terminate(-1); 754 } 755 if (WIFSIGNALED(status)) { 756 signo = WTERMSIG(status); 757#if HAVE_DECL_SYS_SIGNAME 758 warnx("%s got SIG%s", path, sys_signame[signo]); 759#else 760 warnx("%s got signal %d", path, signo); 761#endif 762 terminate(-1); 763 } 764 if (WEXITSTATUS(status) != 0) 765 terminate(-1); 766 currfn = NULL; 767} 768 769static void 770findlibs(char *const *liblst) 771{ 772 int i, k; 773 const char *lib, *path; 774 char *lfn; 775 size_t len; 776 777 lfn = NULL; 778 779 for (i = 0; (lib = liblst[i]) != NULL; i++) { 780 for (k = 0; (path = libsrchpath[k]) != NULL; k++) { 781 len = strlen(path) + strlen(lib); 782 lfn = xrealloc(lfn, len + sizeof ("/llib-l.ln")); 783 (void)sprintf(lfn, "%s/llib-l%s.ln", path, lib); 784 if (rdok(lfn)) 785 break; 786 lfn = xrealloc(lfn, len + sizeof ("/lint/llib-l.ln")); 787 (void)sprintf(lfn, "%s/lint/llib-l%s.ln", path, lib); 788 if (rdok(lfn)) 789 break; 790 } 791 if (path != NULL) { 792 appstrg(&l2libs, concat2("-l", lfn)); 793 } else { 794 warnx("cannot find llib-l%s.ln", lib); 795 } 796 } 797 798 free(lfn); 799} 800 801static int 802rdok(const char *path) 803{ 804 struct stat sbuf; 805 806 if (stat(path, &sbuf) == -1) 807 return (0); 808 if (!S_ISREG(sbuf.st_mode)) 809 return (0); 810 if (access(path, R_OK) == -1) 811 return (0); 812 return (1); 813} 814 815static void 816lint2(void) 817{ 818 char *path, **args; 819 820 args = xcalloc(1, sizeof (char *)); 821 822 if (!Bflag) { 823 path = xmalloc(strlen(PATH_LIBEXEC) + sizeof ("/lint2") + 824 strlen(target_prefix)); 825 (void)sprintf(path, "%s/%slint2", PATH_LIBEXEC, 826 target_prefix); 827 } else { 828 /* 829 * XXX Unclear whether we should be using target_prefix 830 * XXX here. --thorpej@wasabisystems.com 831 */ 832 path = xmalloc(strlen(libexec_path) + sizeof ("/lint2")); 833 (void)sprintf(path, "%s/lint2", libexec_path); 834 } 835 836 appcstrg(&args, path); 837 applst(&args, l2flags); 838 applst(&args, l2libs); 839 applst(&args, p2in); 840 841 runchild(path, args, p2out, -1); 842 free(path); 843 freelst(&args); 844 free(args); 845} 846 847static void 848cat(char *const *srcs, const char *dest) 849{ 850 int ifd, ofd, i; 851 char *src, *buf; 852 ssize_t rlen; 853 854 if ((ofd = open(dest, O_WRONLY | O_CREAT | O_TRUNC, 0666)) == -1) { 855 warn("cannot open %s", dest); 856 terminate(-1); 857 } 858 859 buf = xmalloc(MBLKSIZ); 860 861 for (i = 0; (src = srcs[i]) != NULL; i++) { 862 if ((ifd = open(src, O_RDONLY)) == -1) { 863 free(buf); 864 warn("cannot open %s", src); 865 terminate(-1); 866 } 867 do { 868 if ((rlen = read(ifd, buf, MBLKSIZ)) == -1) { 869 free(buf); 870 warn("read error on %s", src); 871 terminate(-1); 872 } 873 if (write(ofd, buf, (size_t)rlen) == -1) { 874 free(buf); 875 warn("write error on %s", dest); 876 terminate(-1); 877 } 878 } while (rlen == MBLKSIZ); 879 (void)close(ifd); 880 } 881 (void)close(ofd); 882 free(buf); 883} 884