usr.bin/crunch/crunchgen/crunchgen.c

   1 /*
   2  * Copyright (c) 1994 University of Maryland
   3  * All Rights Reserved.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of U.M. not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  U.M. makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as is"
  13  * without express or implied warranty.
  14  *
  15  * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
  17  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  18  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  19  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  *
  22  * Author: James da Silva, Systems Design and Analysis Group
  23  *                         Computer Science Department
  24  *                         University of Maryland at College Park
  25  */
  26 /*
  27  * ========================================================================
  28  * crunchgen.c
  29  *
  30  * Generates a Makefile and main C file for a crunched executable,
  31  * from specs given in a .conf file.
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/stat.h>
  36
  37 #include <ctype.h>
  38 #include <err.h>
  39 #include <paths.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44
  45 #define CRUNCH_VERSION  "0.2"
  46
  47 #define MAXLINELEN      16384
  48 #define MAXFIELDS        2048
  49
  50
  51 /* internal representation of conf file: */
  52
  53 /* simple lists of strings suffice for most parms */
  54
  55 typedef struct strlst {
  56         struct strlst *next;
  57         char *str;
  58 } strlst_t;
  59
  60 /* progs have structure, each field can be set with "special" or calculated */
  61
  62 typedef struct prog {
  63         struct prog *next;      /* link field */
  64         char *name;             /* program name */
  65         char *ident;            /* C identifier for the program name */
  66         char *srcdir;
  67         char *realsrcdir;
  68         char *objdir;
  69         char *objvar;           /* Makefile variable to replace OBJS */
  70         strlst_t *objs, *objpaths;
  71         strlst_t *buildopts;
  72         strlst_t *keeplist;
  73         strlst_t *links;
  74         strlst_t *libs;
  75         strlst_t *libs_so;
  76         int goterror;
  77 } prog_t;
  78
  79
  80 /* global state */
  81
  82 strlst_t *buildopts = NULL;
  83 strlst_t *srcdirs   = NULL;
  84 strlst_t *libs      = NULL;
  85 strlst_t *libs_so   = NULL;
  86 prog_t   *progs     = NULL;
  87
  88 char confname[MAXPATHLEN], infilename[MAXPATHLEN];
  89 char outmkname[MAXPATHLEN], outcfname[MAXPATHLEN], execfname[MAXPATHLEN];
  90 char tempfname[MAXPATHLEN], cachename[MAXPATHLEN], curfilename[MAXPATHLEN];
  91 char outhdrname[MAXPATHLEN] ;   /* user-supplied header for *.mk */
  92 char *objprefix;                /* where are the objects ? */
  93 char *path_make;
  94 int linenum = -1;
  95 int goterror = 0;
  96
  97 int verbose, readcache;         /* options */
  98 int reading_cache;
  99 int makeobj = 0;                /* add 'make obj' rules to the makefile */
 100
 101 int list_mode;
 102
 103 /* general library routines */
 104
 105 void status(const char *str);
 106 void out_of_memory(void);
 107 void add_string(strlst_t **listp, char *str);
 108 int is_dir(const char *pathname);
 109 int is_nonempty_file(const char *pathname);
 110 int subtract_strlst(strlst_t **lista, strlst_t **listb);
 111 int in_list(strlst_t **listp, char *str);
 112
 113 /* helper routines for main() */
 114
 115 void usage(void);
 116 void parse_conf_file(void);
 117 void gen_outputs(void);
 118
 119 extern char *crunched_skel[];
 120
 121
 122 int
 123 main(int argc, char **argv)
 124 {
 125         char *p;
 126         int optc;
 127
 128         verbose = 1;
 129         readcache = 1;
 130         *outmkname = *outcfname = *execfname = '\0';
 131
 132         path_make = getenv("MAKE");
 133         if (path_make == NULL || *path_make == '\0')
 134                 path_make = "make";
 135
 136         p = getenv("MAKEOBJDIRPREFIX");
 137         if (p == NULL || *p == '\0')
 138                 objprefix = "/usr/obj"; /* default */
 139         else
 140                 if ((objprefix = strdup(p)) == NULL)
 141                         out_of_memory();
 142
 143         while((optc = getopt(argc, argv, "lh:m:c:e:p:foq")) != -1) {
 144                 switch(optc) {
 145                 case 'f':
 146                         readcache = 0;
 147                         break;
 148                 case 'o':
 149                         makeobj = 1;
 150                         break;
 151                 case 'q':
 152                         verbose = 0;
 153                         break;
 154
 155                 case 'm':
 156                         strlcpy(outmkname, optarg, sizeof(outmkname));
 157                         break;
 158                 case 'p':
 159                         if ((objprefix = strdup(optarg)) == NULL)
 160                                 out_of_memory();
 161                         break;
 162
 163                 case 'h':
 164                         strlcpy(outhdrname, optarg, sizeof(outhdrname));
 165                         break;
 166                 case 'c':
 167                         strlcpy(outcfname, optarg, sizeof(outcfname));
 168                         break;
 169                 case 'e':
 170                         strlcpy(execfname, optarg, sizeof(execfname));
 171                         break;
 172
 173                 case 'l':
 174                         list_mode++;
 175                         verbose = 0;
 176                         break;
 177
 178                 case '?':
 179                 default:
 180                         usage();
 181                 }
 182         }
 183
 184         argc -= optind;
 185         argv += optind;
 186
 187         if (argc != 1)
 188                 usage();
 189
 190         /*
 191          * generate filenames
 192          */
 193
 194         strlcpy(infilename, argv[0], sizeof(infilename));
 195
 196         /* confname = `basename infilename .conf` */
 197
 198         if ((p=strrchr(infilename, '/')) != NULL)
 199                 strlcpy(confname, p + 1, sizeof(confname));
 200         else
 201                 strlcpy(confname, infilename, sizeof(confname));
 202
 203         if ((p=strrchr(confname, '.')) != NULL && !strcmp(p, ".conf"))
 204                 *p = '\0';
 205
 206         if (!*outmkname)
 207                 snprintf(outmkname, sizeof(outmkname), "%s.mk", confname);
 208         if (!*outcfname)
 209                 snprintf(outcfname, sizeof(outcfname), "%s.c", confname);
 210         if (!*execfname)
 211                 snprintf(execfname, sizeof(execfname), "%s", confname);
 212
 213         snprintf(cachename, sizeof(cachename), "%s.cache", confname);
 214         snprintf(tempfname, sizeof(tempfname), "%s/crunchgen_%sXXXXXX",
 215         getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP, confname);
 216
 217         parse_conf_file();
 218         if (list_mode)
 219                 exit(goterror);
 220
 221         gen_outputs();
 222
 223         exit(goterror);
 224 }
 225
 226
 227 void
 228 usage(void)
 229 {
 230         fprintf(stderr, "%s%s\n\t%s%s\n", "usage: crunchgen [-foq] ",
 231             "[-h <makefile-header-name>] [-m <makefile>]",
 232             "[-p <obj-prefix>] [-c <c-file-name>] [-e <exec-file>] ",
 233             "<conffile>");
 234         exit(1);
 235 }
 236
 237
 238 /*
 239  * ========================================================================
 240  * parse_conf_file subsystem
 241  *
 242  */
 243
 244 /* helper routines for parse_conf_file */
 245
 246 void parse_one_file(char *filename);
 247 void parse_line(char *pline, int *fc, char **fv, int nf);
 248 void add_srcdirs(int argc, char **argv);
 249 void add_progs(int argc, char **argv);
 250 void add_link(int argc, char **argv);
 251 void add_libs(int argc, char **argv);
 252 void add_libs_so(int argc, char **argv);
 253 void add_buildopts(int argc, char **argv);
 254 void add_special(int argc, char **argv);
 255
 256 prog_t *find_prog(char *str);
 257 void add_prog(char *progname);
 258
 259
 260 void
 261 parse_conf_file(void)
 262 {
 263         if (!is_nonempty_file(infilename))
 264                 errx(1, "fatal: input file \"%s\" not found", infilename);
 265
 266         parse_one_file(infilename);
 267         if (readcache && is_nonempty_file(cachename)) {
 268                 reading_cache = 1;
 269                 parse_one_file(cachename);
 270         }
 271 }
 272
 273
 274 void
 275 parse_one_file(char *filename)
 276 {
 277         char *fieldv[MAXFIELDS];
 278         int fieldc;
 279         void (*f)(int c, char **v);
 280         FILE *cf;
 281         char line[MAXLINELEN];
 282
 283         snprintf(line, sizeof(line), "reading %s", filename);
 284         status(line);
 285         strlcpy(curfilename, filename, sizeof(curfilename));
 286
 287         if ((cf = fopen(curfilename, "r")) == NULL) {
 288                 warn("%s", curfilename);
 289                 goterror = 1;
 290                 return;
 291         }
 292
 293         linenum = 0;
 294         while (fgets(line, MAXLINELEN, cf) != NULL) {
 295                 linenum++;
 296                 parse_line(line, &fieldc, fieldv, MAXFIELDS);
 297
 298                 if (fieldc < 1)
 299                         continue;
 300
 301                 if (!strcmp(fieldv[0], "srcdirs"))
 302                         f = add_srcdirs;
 303                 else if(!strcmp(fieldv[0], "progs"))
 304                         f = add_progs;
 305                 else if(!strcmp(fieldv[0], "ln"))
 306                         f = add_link;
 307                 else if(!strcmp(fieldv[0], "libs"))
 308                         f = add_libs;
 309                 else if(!strcmp(fieldv[0], "libs_so"))
 310                         f = add_libs_so;
 311                 else if(!strcmp(fieldv[0], "buildopts"))
 312                         f = add_buildopts;
 313                 else if(!strcmp(fieldv[0], "special"))
 314                         f = add_special;
 315                 else {
 316                         warnx("%s:%d: skipping unknown command `%s'",
 317                             curfilename, linenum, fieldv[0]);
 318                         goterror = 1;
 319                         continue;
 320                 }
 321
 322                 if (fieldc < 2) {
 323                         warnx("%s:%d: %s %s",
 324                             curfilename, linenum, fieldv[0],
 325                             "command needs at least 1 argument, skipping");
 326                         goterror = 1;
 327                         continue;
 328                 }
 329
 330                 f(fieldc, fieldv);
 331         }
 332
 333         if (ferror(cf)) {
 334                 warn("%s", curfilename);
 335                 goterror = 1;
 336         }
 337         fclose(cf);
 338 }
 339
 340
 341 void
 342 parse_line(char *pline, int *fc, char **fv, int nf)
 343 {
 344         char *p;
 345
 346         p = pline;
 347         *fc = 0;
 348
 349         while (1) {
 350                 while (isspace((unsigned char)*p))
 351                         p++;
 352
 353                 if (*p == '\0' || *p == '#')
 354                         break;
 355
 356                 if (*fc < nf)
 357                         fv[(*fc)++] = p;
 358
 359                 while (*p && !isspace((unsigned char)*p) && *p != '#')
 360                         p++;
 361
 362                 if (*p == '\0' || *p == '#')
 363                         break;
 364
 365                 *p++ = '\0';
 366         }
 367
 368         if (*p)
 369                 *p = '\0';              /* needed for '#' case */
 370 }
 371
 372
 373 void
 374 add_srcdirs(int argc, char **argv)
 375 {
 376         int i;
 377
 378         for (i = 1; i < argc; i++) {
 379                 if (is_dir(argv[i]))
 380                         add_string(&srcdirs, argv[i]);
 381                 else {
 382                         warnx("%s:%d: `%s' is not a directory, skipping it",
 383                             curfilename, linenum, argv[i]);
 384                         goterror = 1;
 385                 }
 386         }
 387 }
 388
 389
 390 void
 391 add_progs(int argc, char **argv)
 392 {
 393         int i;
 394
 395         for (i = 1; i < argc; i++)
 396                 add_prog(argv[i]);
 397 }
 398
 399
 400 void
 401 add_prog(char *progname)
 402 {
 403         prog_t *p1, *p2;
 404
 405         /* add to end, but be smart about dups */
 406
 407         for (p1 = NULL, p2 = progs; p2 != NULL; p1 = p2, p2 = p2->next)
 408                 if (!strcmp(p2->name, progname))
 409                         return;
 410
 411         p2 = malloc(sizeof(prog_t));
 412         if(p2) {
 413                 memset(p2, 0, sizeof(prog_t));
 414                 p2->name = strdup(progname);
 415         }
 416         if (!p2 || !p2->name)
 417                 out_of_memory();
 418
 419         p2->next = NULL;
 420         if (p1 == NULL)
 421                 progs = p2;
 422         else
 423                 p1->next = p2;
 424
 425         p2->ident = NULL;
 426         p2->srcdir = NULL;
 427         p2->realsrcdir = NULL;
 428         p2->objdir = NULL;
 429         p2->links = NULL;
 430         p2->libs = NULL;
 431         p2->libs_so = NULL;
 432         p2->objs = NULL;
 433         p2->keeplist = NULL;
 434         p2->buildopts = NULL;
 435         p2->goterror = 0;
 436
 437         if (list_mode)
 438                 printf("%s\n",progname);
 439 }
 440
 441
 442 void
 443 add_link(int argc, char **argv)
 444 {
 445         int i;
 446         prog_t *p = find_prog(argv[1]);
 447
 448         if (p == NULL) {
 449                 warnx("%s:%d: no prog %s previously declared, skipping link",
 450                     curfilename, linenum, argv[1]);
 451                 goterror = 1;
 452                 return;
 453         }
 454
 455         for (i = 2; i < argc; i++) {
 456                 if (list_mode)
 457                         printf("%s\n",argv[i]);
 458
 459                 add_string(&p->links, argv[i]);
 460         }
 461 }
 462
 463
 464 void
 465 add_libs(int argc, char **argv)
 466 {
 467         int i;
 468
 469         for(i = 1; i < argc; i++) {
 470                 add_string(&libs, argv[i]);
 471                 if ( in_list(&libs_so, argv[i]) )
 472                         warnx("%s:%d: "
 473                                 "library `%s' specified as dynamic earlier",
 474                                 curfilename, linenum, argv[i]);
 475         }
 476 }
 477
 478
 479 void
 480 add_libs_so(int argc, char **argv)
 481 {
 482         int i;
 483
 484         for(i = 1; i < argc; i++) {
 485                 add_string(&libs_so, argv[i]);
 486                 if ( in_list(&libs, argv[i]) )
 487                         warnx("%s:%d: "
 488                                 "library `%s' specified as static earlier",
 489                                 curfilename, linenum, argv[i]);
 490         }
 491 }
 492
 493
 494 void
 495 add_buildopts(int argc, char **argv)
 496 {
 497         int i;
 498
 499         for (i = 1; i < argc; i++)
 500                 add_string(&buildopts, argv[i]);
 501 }
 502
 503
 504 void
 505 add_special(int argc, char **argv)
 506 {
 507         int i;
 508         prog_t *p = find_prog(argv[1]);
 509
 510         if (p == NULL) {
 511                 if (reading_cache)
 512                         return;
 513
 514                 warnx("%s:%d: no prog %s previously declared, skipping special",
 515                     curfilename, linenum, argv[1]);
 516                 goterror = 1;
 517                 return;
 518         }
 519
 520         if (!strcmp(argv[2], "ident")) {
 521                 if (argc != 4)
 522                         goto argcount;
 523                 if ((p->ident = strdup(argv[3])) == NULL)
 524                         out_of_memory();
 525         } else if (!strcmp(argv[2], "srcdir")) {
 526                 if (argc != 4)
 527                         goto argcount;
 528                 if ((p->srcdir = strdup(argv[3])) == NULL)
 529                         out_of_memory();
 530         } else if (!strcmp(argv[2], "objdir")) {
 531                 if(argc != 4)
 532                         goto argcount;
 533                 if((p->objdir = strdup(argv[3])) == NULL)
 534                         out_of_memory();
 535         } else if (!strcmp(argv[2], "objs")) {
 536                 p->objs = NULL;
 537                 for (i = 3; i < argc; i++)
 538                         add_string(&p->objs, argv[i]);
 539         } else if (!strcmp(argv[2], "objpaths")) {
 540                 p->objpaths = NULL;
 541                 for (i = 3; i < argc; i++)
 542                         add_string(&p->objpaths, argv[i]);
 543         } else if (!strcmp(argv[2], "keep")) {
 544                 p->keeplist = NULL;
 545                 for(i = 3; i < argc; i++)
 546                         add_string(&p->keeplist, argv[i]);
 547         } else if (!strcmp(argv[2], "objvar")) {
 548                 if(argc != 4)
 549                         goto argcount;
 550                 if ((p->objvar = strdup(argv[3])) == NULL)
 551                         out_of_memory();
 552         } else if (!strcmp(argv[2], "buildopts")) {
 553                 p->buildopts = NULL;
 554                 for (i = 3; i < argc; i++)
 555                         add_string(&p->buildopts, argv[i]);
 556         } else if (!strcmp(argv[2], "lib")) {
 557                 for (i = 3; i < argc; i++)
 558                         add_string(&p->libs, argv[i]);
 559         } else {
 560                 warnx("%s:%d: bad parameter name `%s', skipping line",
 561                     curfilename, linenum, argv[2]);
 562                 goterror = 1;
 563         }
 564         return;
 565
 566  argcount:
 567         warnx("%s:%d: too %s arguments, expected \"special %s %s <string>\"",
 568             curfilename, linenum, argc < 4? "few" : "many", argv[1], argv[2]);
 569         goterror = 1;
 570 }
 571
 572
 573 prog_t *find_prog(char *str)
 574 {
 575         prog_t *p;
 576
 577         for (p = progs; p != NULL; p = p->next)
 578                 if (!strcmp(p->name, str))
 579                         return p;
 580
 581         return NULL;
 582 }
 583
 584
 585 /*
 586  * ========================================================================
 587  * gen_outputs subsystem
 588  *
 589  */
 590
 591 /* helper subroutines */
 592
 593 void remove_error_progs(void);
 594 void fillin_program(prog_t *p);
 595 void gen_specials_cache(void);
 596 void gen_output_makefile(void);
 597 void gen_output_cfile(void);
 598
 599 void fillin_program_objs(prog_t *p, char *path);
 600 void top_makefile_rules(FILE *outmk);
 601 void prog_makefile_rules(FILE *outmk, prog_t *p);
 602 void output_strlst(FILE *outf, strlst_t *lst);
 603 char *genident(char *str);
 604 char *dir_search(char *progname);
 605
 606
 607 void
 608 gen_outputs(void)
 609 {
 610         prog_t *p;
 611
 612         for (p = progs; p != NULL; p = p->next)
 613                 fillin_program(p);
 614
 615         remove_error_progs();
 616         gen_specials_cache();
 617         gen_output_cfile();
 618         gen_output_makefile();
 619         status("");
 620         fprintf(stderr,
 621             "Run \"%s -f %s\" to build crunched binary.\n",
 622             path_make, outmkname);
 623 }
 624
 625 /*
 626  * run the makefile for the program to find which objects are necessary
 627  */
 628 void
 629 fillin_program(prog_t *p)
 630 {
 631         char path[MAXPATHLEN];
 632         char line[MAXLINELEN];
 633         FILE *f;
 634
 635         snprintf(line, MAXLINELEN, "filling in parms for %s", p->name);
 636         status(line);
 637
 638         if (!p->ident)
 639                 p->ident = genident(p->name);
 640
 641         /* look for the source directory if one wasn't specified by a special */
 642         if (!p->srcdir) {
 643                 p->srcdir = dir_search(p->name);
 644         }
 645
 646         /* Determine the actual srcdir (maybe symlinked). */
 647         if (p->srcdir) {
 648                 snprintf(line, MAXLINELEN, "cd %s && echo -n `/bin/pwd`",
 649                     p->srcdir);
 650                 f = popen(line,"r");
 651                 if (!f)
 652                         errx(1, "Can't execute: %s\n", line);
 653
 654                 path[0] = '\0';
 655                 fgets(path, sizeof path, f);
 656                 if (pclose(f))
 657                         errx(1, "Can't execute: %s\n", line);
 658
 659                 if (!*path)
 660                         errx(1, "Can't perform pwd on: %s\n", p->srcdir);
 661
 662                 p->realsrcdir = strdup(path);
 663         }
 664
 665         /* Unless the option to make object files was specified the
 666         * the objects will be built in the source directory unless
 667         * an object directory already exists.
 668         */
 669         if (!makeobj && !p->objdir && p->srcdir) {
 670                 snprintf(line, sizeof line, "%s/%s", objprefix, p->realsrcdir);
 671                 if (is_dir(line)) {
 672                         if ((p->objdir = strdup(line)) == NULL)
 673                         out_of_memory();
 674                 } else
 675                         p->objdir = p->realsrcdir;
 676         }
 677
 678         /*
 679         * XXX look for a Makefile.{name} in local directory first.
 680         * This lets us override the original Makefile.
 681         */
 682         snprintf(path, sizeof(path), "Makefile.%s", p->name);
 683         if (is_nonempty_file(path)) {
 684                 snprintf(line, MAXLINELEN, "Using %s for %s", path, p->name);
 685                 status(line);
 686         } else
 687                 if (p->srcdir)
 688                         snprintf(path, sizeof(path), "%s/Makefile", p->srcdir);
 689         if (!p->objs && p->srcdir && is_nonempty_file(path))
 690                 fillin_program_objs(p, path);
 691
 692         if (!p->srcdir && !p->objdir && verbose)
 693                 warnx("%s: %s: %s",
 694                     "warning: could not find source directory",
 695                     infilename, p->name);
 696         if (!p->objs && verbose)
 697                 warnx("%s: %s: warning: could not find any .o files",
 698                     infilename, p->name);
 699
 700         if ((!p->srcdir || !p->objdir) && !p->objs)
 701                 p->goterror = 1;
 702 }
 703
 704 void
 705 fillin_program_objs(prog_t *p, char *path)
 706 {
 707         char *obj, *cp;
 708         int fd, rc;
 709         FILE *f;
 710         char *objvar="OBJS";
 711         strlst_t *s;
 712         char line[MAXLINELEN];
 713
 714         /* discover the objs from the srcdir Makefile */
 715
 716         if ((fd = mkstemp(tempfname)) == -1) {
 717                 perror(tempfname);
 718                 exit(1);
 719         }
 720         if ((f = fdopen(fd, "w")) == NULL) {
 721                 warn("%s", tempfname);
 722                 goterror = 1;
 723                 return;
 724         }
 725         if (p->objvar)
 726                 objvar = p->objvar;
 727
 728         /*
 729         * XXX include outhdrname (e.g. to contain Make variables)
 730         */
 731         if (outhdrname[0] != '\0')
 732                 fprintf(f, ".include \"%s\"\n", outhdrname);
 733         fprintf(f, ".include \"%s\"\n", path);
 734         fprintf(f, ".POSIX:\n");
 735         if (buildopts) {
 736                 fprintf(f, "BUILDOPTS+=");
 737                 output_strlst(f, buildopts);
 738         }
 739         fprintf(f, ".if defined(PROG)\n");
 740         fprintf(f, "%s?=${PROG}.o\n", objvar);
 741         fprintf(f, ".endif\n");
 742         fprintf(f, "loop:\n\t@echo 'OBJS= '${%s}\n", objvar);
 743
 744         fprintf(f, "crunchgen_objs:\n"
 745             "\t@cd %s && %s -f %s $(BUILDOPTS) $(%s_OPTS)",
 746             p->srcdir, path_make, tempfname, p->ident);
 747         for (s = p->buildopts; s != NULL; s = s->next)
 748                 fprintf(f, " %s", s->str);
 749         fprintf(f, " loop\n");
 750
 751         fclose(f);
 752
 753         snprintf(line, MAXLINELEN, "cd %s && %s -f %s -B crunchgen_objs",
 754              p->srcdir, path_make, tempfname);
 755         if ((f = popen(line, "r")) == NULL) {
 756                 warn("submake pipe");
 757                 goterror = 1;
 758                 return;
 759         }
 760
 761         while(fgets(line, MAXLINELEN, f)) {
 762                 if (strncmp(line, "OBJS= ", 6)) {
 763                         warnx("make error: %s", line);
 764                         goterror = 1;
 765                         continue;
 766                 }
 767
 768                 cp = line + 6;
 769                 while (isspace((unsigned char)*cp))
 770                         cp++;
 771
 772                 while(*cp) {
 773                         obj = cp;
 774                         while (*cp && !isspace((unsigned char)*cp))
 775                                 cp++;
 776                         if (*cp)
 777                                 *cp++ = '\0';
 778                         add_string(&p->objs, obj);
 779                         while (isspace((unsigned char)*cp))
 780                                 cp++;
 781                 }
 782         }
 783
 784         if ((rc=pclose(f)) != 0) {
 785                 warnx("make error: make returned %d", rc);
 786                 goterror = 1;
 787         }
 788
 789         unlink(tempfname);
 790 }
 791
 792 void
 793 remove_error_progs(void)
 794 {
 795         prog_t *p1, *p2;
 796
 797         p1 = NULL; p2 = progs;
 798         while (p2 != NULL) {
 799                 if (!p2->goterror)
 800                         p1 = p2, p2 = p2->next;
 801                 else {
 802                         /* delete it from linked list */
 803                         warnx("%s: %s: ignoring program because of errors",
 804                             infilename, p2->name);
 805                         if (p1)
 806                                 p1->next = p2->next;
 807                         else
 808                                 progs = p2->next;
 809                         p2 = p2->next;
 810                 }
 811         }
 812 }
 813
 814 void
 815 gen_specials_cache(void)
 816 {
 817         FILE *cachef;
 818         prog_t *p;
 819         char line[MAXLINELEN];
 820
 821         snprintf(line, MAXLINELEN, "generating %s", cachename);
 822         status(line);
 823
 824         if ((cachef = fopen(cachename, "w")) == NULL) {
 825                 warn("%s", cachename);
 826                 goterror = 1;
 827                 return;
 828         }
 829
 830         fprintf(cachef, "# %s - parm cache generated from %s by crunchgen "
 831             " %s\n\n",
 832             cachename, infilename, CRUNCH_VERSION);
 833
 834         for (p = progs; p != NULL; p = p->next) {
 835                 fprintf(cachef, "\n");
 836                 if (p->srcdir)
 837                         fprintf(cachef, "special %s srcdir %s\n",
 838                             p->name, p->srcdir);
 839                 if (p->objdir)
 840                         fprintf(cachef, "special %s objdir %s\n",
 841                             p->name, p->objdir);
 842                 if (p->objs) {
 843                         fprintf(cachef, "special %s objs", p->name);
 844                         output_strlst(cachef, p->objs);
 845                 }
 846                 if (p->objpaths) {
 847                         fprintf(cachef, "special %s objpaths", p->name);
 848                         output_strlst(cachef, p->objpaths);
 849                 }
 850         }
 851         fclose(cachef);
 852 }
 853
 854
 855 void
 856 gen_output_makefile(void)
 857 {
 858         prog_t *p;
 859         FILE *outmk;
 860         char line[MAXLINELEN];
 861
 862         snprintf(line, MAXLINELEN, "generating %s", outmkname);
 863         status(line);
 864
 865         if ((outmk = fopen(outmkname, "w")) == NULL) {
 866                 warn("%s", outmkname);
 867                 goterror = 1;
 868                 return;
 869         }
 870
 871         fprintf(outmk, "# %s - generated from %s by crunchgen %s\n\n",
 872             outmkname, infilename, CRUNCH_VERSION);
 873
 874         if (outhdrname[0] != '\0')
 875                 fprintf(outmk, ".include \"%s\"\n", outhdrname);
 876
 877         top_makefile_rules(outmk);
 878         for (p = progs; p != NULL; p = p->next)
 879                 prog_makefile_rules(outmk, p);
 880
 881         fprintf(outmk, "\n# ========\n");
 882         fclose(outmk);
 883 }
 884
 885
 886 void
 887 gen_output_cfile(void)
 888 {
 889         char **cp;
 890         FILE *outcf;
 891         prog_t *p;
 892         strlst_t *s;
 893         char line[MAXLINELEN];
 894
 895         snprintf(line, MAXLINELEN, "generating %s", outcfname);
 896         status(line);
 897
 898         if((outcf = fopen(outcfname, "w")) == NULL) {
 899                 warn("%s", outcfname);
 900                 goterror = 1;
 901                 return;
 902         }
 903
 904         fprintf(outcf,
 905             "/* %s - generated from %s by crunchgen %s */\n",
 906             outcfname, infilename, CRUNCH_VERSION);
 907
 908         fprintf(outcf, "#define EXECNAME \"%s\"\n", execfname);
 909         for (cp = crunched_skel; *cp != NULL; cp++)
 910                 fprintf(outcf, "%s\n", *cp);
 911
 912         for (p = progs; p != NULL; p = p->next)
 913                 fprintf(outcf, "extern int _crunched_%s_stub();\n", p->ident);
 914
 915         fprintf(outcf, "\nstruct stub entry_points[] = {\n");
 916         for (p = progs; p != NULL; p = p->next) {
 917                 fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n",
 918                     p->name, p->ident);
 919                 for (s = p->links; s != NULL; s = s->next)
 920                         fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n",
 921                             s->str, p->ident);
 922         }
 923
 924         fprintf(outcf, "\t{ EXECNAME, crunched_main },\n");
 925         fprintf(outcf, "\t{ NULL, NULL }\n};\n");
 926         fclose(outcf);
 927 }
 928
 929
 930 char *genident(char *str)
 931 {
 932         char *n, *s, *d;
 933
 934         /*
 935          * generates a Makefile/C identifier from a program name,
 936          * mapping '-' to '_' and ignoring all other non-identifier
 937          * characters.  This leads to programs named "foo.bar" and
 938          * "foobar" to map to the same identifier.
 939          */
 940
 941         if ((n = strdup(str)) == NULL)
 942                 return NULL;
 943         for (d = s = n; *s != '\0'; s++) {
 944                 if (*s == '-')
 945                         *d++ = '_';
 946                 else if (*s == '_' || isalnum((unsigned char)*s))
 947                         *d++ = *s;
 948         }
 949         *d = '\0';
 950         return n;
 951 }
 952
 953
 954 char *dir_search(char *progname)
 955 {
 956         char path[MAXPATHLEN];
 957         strlst_t *dir;
 958         char *srcdir;
 959
 960         for (dir = srcdirs; dir != NULL; dir = dir->next) {
 961                 snprintf(path, MAXPATHLEN, "%s/%s", dir->str, progname);
 962                 if (!is_dir(path))
 963                         continue;
 964
 965                 if ((srcdir = strdup(path)) == NULL)
 966                         out_of_memory();
 967
 968                 return srcdir;
 969         }
 970         return NULL;
 971 }
 972
 973
 974 void
 975 top_makefile_rules(FILE *outmk)
 976 {
 977         prog_t *p;
 978
 979         fprintf(outmk, "LD?= ld\n");
 980         if ( subtract_strlst(&libs, &libs_so) )
 981                 fprintf(outmk, "# NOTE: Some LIBS declarations below overridden by LIBS_SO\n");
 982
 983         fprintf(outmk, "LIBS+=");
 984         output_strlst(outmk, libs);
 985
 986         fprintf(outmk, "LIBS_SO+=");
 987         output_strlst(outmk, libs_so);
 988
 989         if (makeobj) {
 990                 fprintf(outmk, "MAKEOBJDIRPREFIX?=%s\n", objprefix);
 991                 fprintf(outmk, "MAKEENV=env MAKEOBJDIRPREFIX=$(MAKEOBJDIRPREFIX)\n");
 992                 fprintf(outmk, "CRUNCHMAKE=$(MAKEENV) $(MAKE)\n");
 993         } else {
 994                 fprintf(outmk, "CRUNCHMAKE=$(MAKE)\n");
 995         }
 996
 997         if (buildopts) {
 998                 fprintf(outmk, "BUILDOPTS+=");
 999                 output_strlst(outmk, buildopts);
1000         }
1001
1002         fprintf(outmk, "CRUNCHED_OBJS=");
1003         for (p = progs; p != NULL; p = p->next)
1004                 fprintf(outmk, " %s.lo", p->name);
1005         fprintf(outmk, "\n");
1006
1007         fprintf(outmk, "SUBMAKE_TARGETS=");
1008         for (p = progs; p != NULL; p = p->next)
1009                 fprintf(outmk, " %s_make", p->ident);
1010         fprintf(outmk, "\nSUBCLEAN_TARGETS=");
1011         for (p = progs; p != NULL; p = p->next)
1012                 fprintf(outmk, " %s_clean", p->ident);
1013         fprintf(outmk, "\n\n");
1014
1015         fprintf(outmk, "all: objs exe\nobjs: $(SUBMAKE_TARGETS)\n");
1016         fprintf(outmk, "exe: %s\n", execfname);
1017         fprintf(outmk, "%s: %s.o $(CRUNCHED_OBJS) $(SUBMAKE_TARGETS)\n", execfname, execfname);
1018         fprintf(outmk, ".if defined(LIBS_SO) && !empty(LIBS_SO)\n");
1019         fprintf(outmk, "\t$(CC) -o %s %s.o $(CRUNCHED_OBJS) \\\n",
1020             execfname, execfname);
1021         fprintf(outmk, "\t\t-Xlinker -Bstatic $(LIBS) \\\n");
1022         fprintf(outmk, "\t\t-Xlinker -Bdynamic $(LIBS_SO)\n");
1023         fprintf(outmk, ".else\n");
1024         fprintf(outmk, "\t$(CC) -static -o %s %s.o $(CRUNCHED_OBJS) $(LIBS)\n",
1025             execfname, execfname);
1026         fprintf(outmk, ".endif\n");
1027         fprintf(outmk, "\tstrip %s\n", execfname);
1028         fprintf(outmk, "realclean: clean subclean\n");
1029         fprintf(outmk, "clean:\n\trm -f %s *.lo *.o *_stub.c\n", execfname);
1030         fprintf(outmk, "subclean: $(SUBCLEAN_TARGETS)\n");
1031 }
1032
1033
1034 void
1035 prog_makefile_rules(FILE *outmk, prog_t *p)
1036 {
1037         strlst_t *lst;
1038
1039         fprintf(outmk, "\n# -------- %s\n\n", p->name);
1040
1041         fprintf(outmk, "%s_OBJDIR=", p->ident);
1042         if (p->objdir)
1043                 fprintf(outmk, "%s", p->objdir);
1044         else
1045                 fprintf(outmk, "$(MAKEOBJDIRPREFIX)/$(%s_REALSRCDIR)\n",
1046                     p->ident);
1047         fprintf(outmk, "\n");
1048
1049         fprintf(outmk, "%s_OBJPATHS=", p->ident);
1050         if (p->objpaths)
1051                 output_strlst(outmk, p->objpaths);
1052         else {
1053                 for (lst = p->objs; lst != NULL; lst = lst->next) {
1054                         fprintf(outmk, " $(%s_OBJDIR)/%s", p->ident, lst->str);
1055                 }
1056                 fprintf(outmk, "\n");
1057         }
1058         fprintf(outmk, "$(%s_OBJPATHS): .NOMETA\n", p->ident);
1059
1060         if (p->srcdir && p->objs) {
1061                 fprintf(outmk, "%s_SRCDIR=%s\n", p->ident, p->srcdir);
1062                 fprintf(outmk, "%s_REALSRCDIR=%s\n", p->ident, p->realsrcdir);
1063
1064                 fprintf(outmk, "%s_OBJS=", p->ident);
1065                 output_strlst(outmk, p->objs);
1066                 if (p->buildopts != NULL) {
1067                         fprintf(outmk, "%s_OPTS+=", p->ident);
1068                         output_strlst(outmk, p->buildopts);
1069                 }
1070 #if 0
1071                 fprintf(outmk, "$(%s_OBJPATHS): %s_make\n\n", p->ident, p->ident);
1072 #endif
1073                 fprintf(outmk, "%s_make:\n", p->ident);
1074                 fprintf(outmk, "\t(cd $(%s_SRCDIR) && ", p->ident);
1075                 if (makeobj)
1076                         fprintf(outmk, "$(CRUNCHMAKE) obj && ");
1077                 fprintf(outmk, "\\\n");
1078                 fprintf(outmk, "\t\t$(CRUNCHMAKE) $(BUILDOPTS) $(%s_OPTS) depend &&",
1079                     p->ident);
1080                 fprintf(outmk, "\\\n");
1081                 fprintf(outmk, "\t\t$(CRUNCHMAKE) $(BUILDOPTS) $(%s_OPTS) "
1082                     "$(%s_OBJS))",
1083                     p->ident, p->ident);
1084                 fprintf(outmk, "\n");
1085                 fprintf(outmk, "%s_clean:\n", p->ident);
1086                 fprintf(outmk, "\t(cd $(%s_SRCDIR) && $(CRUNCHMAKE) $(BUILDOPTS) clean cleandepend)\n\n",
1087                     p->ident);
1088         } else {
1089                 fprintf(outmk, "%s_make:\n", p->ident);
1090                 fprintf(outmk, "\t@echo \"** cannot make objs for %s\"\n\n",
1091                     p->name);
1092         }
1093
1094         if (p->libs) {
1095                 fprintf(outmk, "%s_LIBS=", p->ident);
1096                 output_strlst(outmk, p->libs);
1097         }
1098
1099         fprintf(outmk, "%s_stub.c:\n", p->name);
1100         fprintf(outmk, "\techo \""
1101             "extern int main(int, char **, char **); "
1102             "int _crunched_%s_stub(int argc, char **argv, char **envp)"
1103             "{return main(argc,argv,envp);}\" >%s_stub.c\n",
1104             p->ident, p->name);
1105         fprintf(outmk, "%s.lo: %s_stub.o $(%s_OBJPATHS)",
1106             p->name, p->name, p->ident);
1107         if (p->libs)
1108                 fprintf(outmk, " $(%s_LIBS)", p->ident);
1109
1110         fprintf(outmk, "\n");
1111         fprintf(outmk, "\t$(CC) -nostdlib -Wl,-dc -r -o %s.lo %s_stub.o $(%s_OBJPATHS)",
1112             p->name, p->name, p->ident);
1113         if (p->libs)
1114                 fprintf(outmk, " $(%s_LIBS)", p->ident);
1115         fprintf(outmk, "\n");
1116         fprintf(outmk, "\tcrunchide -k _crunched_%s_stub ", p->ident);
1117         for (lst = p->keeplist; lst != NULL; lst = lst->next)
1118                 fprintf(outmk, "-k %s ", lst->str);
1119         fprintf(outmk, "%s.lo\n", p->name);
1120 }
1121
1122 void
1123 output_strlst(FILE *outf, strlst_t *lst)
1124 {
1125         for (; lst != NULL; lst = lst->next)
1126                 if ( strlen(lst->str) )
1127                         fprintf(outf, " %s", lst->str);
1128         fprintf(outf, "\n");
1129 }
1130
1131
1132 /*
1133  * ========================================================================
1134  * general library routines
1135  *
1136  */
1137
1138 void
1139 status(const char *str)
1140 {
1141         static int lastlen = 0;
1142         int len, spaces;
1143
1144         if (!verbose)
1145                 return;
1146
1147         len = strlen(str);
1148         spaces = lastlen - len;
1149         if (spaces < 1)
1150                 spaces = 1;
1151
1152         fprintf(stderr, " [%s]%*.*s\r", str, spaces, spaces, " ");
1153         fflush(stderr);
1154         lastlen = len;
1155 }
1156
1157
1158 void
1159 out_of_memory(void)
1160 {
1161         err(1, "%s: %d: out of memory, stopping", infilename, linenum);
1162 }
1163
1164
1165 void
1166 add_string(strlst_t **listp, char *str)
1167 {
1168         strlst_t *p1, *p2;
1169
1170         /* add to end, but be smart about dups */
1171
1172         for (p1 = NULL, p2 = *listp; p2 != NULL; p1 = p2, p2 = p2->next)
1173                 if (!strcmp(p2->str, str))
1174                         return;
1175
1176         p2 = malloc(sizeof(strlst_t));
1177         if (p2) {
1178                 p2->next = NULL;
1179                 p2->str = strdup(str);
1180         }
1181         if (!p2 || !p2->str)
1182                 out_of_memory();
1183
1184         if (p1 == NULL)
1185                 *listp = p2;
1186         else
1187                 p1->next = p2;
1188 }
1189
1190 int
1191 subtract_strlst(strlst_t **lista, strlst_t **listb)
1192 {
1193         int subtract_count = 0;
1194         strlst_t *p1;
1195         for (p1 = *listb; p1 != NULL; p1 = p1->next)
1196                 if ( in_list(lista, p1->str) ) {
1197                         warnx("Will compile library `%s' dynamically", p1->str);
1198                         strcat(p1->str, "");
1199                         subtract_count++;
1200                 }
1201         return subtract_count;
1202 }
1203
1204 int
1205 in_list(strlst_t **listp, char *str)
1206 {
1207         strlst_t *p1;
1208         for (p1 = *listp; p1 != NULL; p1 = p1->next)
1209                 if (!strcmp(p1->str, str))
1210                         return 1;
1211         return 0;
1212 }
1213
1214 int
1215 is_dir(const char *pathname)
1216 {
1217         struct stat buf;
1218
1219         if (stat(pathname, &buf) == -1)
1220                 return 0;
1221
1222         return S_ISDIR(buf.st_mode);
1223 }
1224
1225 int
1226 is_nonempty_file(const char *pathname)
1227 {
1228         struct stat buf;
1229
1230         if (stat(pathname, &buf) == -1)
1231                 return 0;
1232
1233         return S_ISREG(buf.st_mode) && buf.st_size > 0;
1234 }