bin/bmake/main.c

   1 /*      $NetBSD: main.c,v 1.255 2017/01/31 06:54:23 sjg Exp $   */
   2
   3 /*
   4  * Copyright (c) 1988, 1989, 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Adam de Boor.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /*
  36  * Copyright (c) 1989 by Berkeley Softworks
  37  * All rights reserved.
  38  *
  39  * This code is derived from software contributed to Berkeley by
  40  * Adam de Boor.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  * 3. All advertising materials mentioning features or use of this software
  51  *    must display the following acknowledgement:
  52  *      This product includes software developed by the University of
  53  *      California, Berkeley and its contributors.
  54  * 4. Neither the name of the University nor the names of its contributors
  55  *    may be used to endorse or promote products derived from this software
  56  *    without specific prior written permission.
  57  *
  58  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  59  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  60  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  61  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  62  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  63  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  64  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  66  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  68  * SUCH DAMAGE.
  69  */
  70
  71 #ifndef MAKE_NATIVE
  72 static char rcsid[] = "$NetBSD: main.c,v 1.255 2017/01/31 06:54:23 sjg Exp $";
  73 #else
  74 #include <sys/cdefs.h>
  75 #ifndef lint
  76 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\
  77  The Regents of the University of California.  All rights reserved.");
  78 #endif /* not lint */
  79
  80 #ifndef lint
  81 #if 0
  82 static char sccsid[] = "@(#)main.c      8.3 (Berkeley) 3/19/94";
  83 #else
  84 __RCSID("$NetBSD: main.c,v 1.255 2017/01/31 06:54:23 sjg Exp $");
  85 #endif
  86 #endif /* not lint */
  87 #endif
  88
  89 /*-
  90  * main.c --
  91  *      The main file for this entire program. Exit routines etc
  92  *      reside here.
  93  *
  94  * Utility functions defined in this file:
  95  *      Main_ParseArgLine       Takes a line of arguments, breaks them and
  96  *                              treats them as if they were given when first
  97  *                              invoked. Used by the parse module to implement
  98  *                              the .MFLAGS target.
  99  *
 100  *      Error                   Print a tagged error message. The global
 101  *                              MAKE variable must have been defined. This
 102  *                              takes a format string and optional arguments
 103  *                              for it.
 104  *
 105  *      Fatal                   Print an error message and exit. Also takes
 106  *                              a format string and arguments for it.
 107  *
 108  *      Punt                    Aborts all jobs and exits with a message. Also
 109  *                              takes a format string and arguments for it.
 110  *
 111  *      Finish                  Finish things up by printing the number of
 112  *                              errors which occurred, as passed to it, and
 113  *                              exiting.
 114  */
 115
 116 #include <sys/types.h>
 117 #include <sys/time.h>
 118 #include <sys/param.h>
 119 #include <sys/resource.h>
 120 #include <sys/stat.h>
 121 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL)
 122 #include <sys/sysctl.h>
 123 #endif
 124 #include <sys/utsname.h>
 125 #include "wait.h"
 126
 127 #include <errno.h>
 128 #include <signal.h>
 129 #include <stdarg.h>
 130 #include <stdio.h>
 131 #include <stdlib.h>
 132 #include <time.h>
 133 #include <ctype.h>
 134
 135 #include "make.h"
 136 #include "hash.h"
 137 #include "dir.h"
 138 #include "job.h"
 139 #include "pathnames.h"
 140 #include "trace.h"
 141
 142 #ifdef USE_IOVEC
 143 #include <sys/uio.h>
 144 #endif
 145
 146 #ifndef DEFMAXLOCAL
 147 #define DEFMAXLOCAL DEFMAXJOBS
 148 #endif  /* DEFMAXLOCAL */
 149
 150 #ifndef __arraycount
 151 # define __arraycount(__x)      (sizeof(__x) / sizeof(__x[0]))
 152 #endif
 153
 154 Lst                     create;         /* Targets to be made */
 155 time_t                  now;            /* Time at start of make */
 156 GNode                   *DEFAULT;       /* .DEFAULT node */
 157 Boolean                 allPrecious;    /* .PRECIOUS given on line by itself */
 158 Boolean                 deleteOnError;  /* .DELETE_ON_ERROR: set */
 159
 160 static Boolean          noBuiltins;     /* -r flag */
 161 static Lst              makefiles;      /* ordered list of makefiles to read */
 162 static Boolean          printVars;      /* print value of one or more vars */
 163 static Lst              variables;      /* list of variables to print */
 164 int                     maxJobs;        /* -j argument */
 165 static int              maxJobTokens;   /* -j argument */
 166 Boolean                 compatMake;     /* -B argument */
 167 int                     debug;          /* -d argument */
 168 Boolean                 debugVflag;     /* -dV */
 169 Boolean                 noExecute;      /* -n flag */
 170 Boolean                 noRecursiveExecute;     /* -N flag */
 171 Boolean                 keepgoing;      /* -k flag */
 172 Boolean                 queryFlag;      /* -q flag */
 173 Boolean                 touchFlag;      /* -t flag */
 174 Boolean                 enterFlag;      /* -w flag */
 175 Boolean                 enterFlagObj;   /* -w and objdir != srcdir */
 176 Boolean                 ignoreErrors;   /* -i flag */
 177 Boolean                 beSilent;       /* -s flag */
 178 Boolean                 oldVars;        /* variable substitution style */
 179 Boolean                 checkEnvFirst;  /* -e flag */
 180 Boolean                 parseWarnFatal; /* -W flag */
 181 Boolean                 jobServer;      /* -J flag */
 182 static int jp_0 = -1, jp_1 = -1;        /* ends of parent job pipe */
 183 Boolean                 varNoExportEnv; /* -X flag */
 184 Boolean                 doing_depend;   /* Set while reading .depend */
 185 static Boolean          jobsRunning;    /* TRUE if the jobs might be running */
 186 static const char *     tracefile;
 187 static void             MainParseArgs(int, char **);
 188 static int              ReadMakefile(const void *, const void *);
 189 static void             usage(void) MAKE_ATTR_DEAD;
 190
 191 static Boolean          ignorePWD;      /* if we use -C, PWD is meaningless */
 192 static char objdir[MAXPATHLEN + 1];     /* where we chdir'ed to */
 193 char curdir[MAXPATHLEN + 1];            /* Startup directory */
 194 char *progname;                         /* the program name */
 195 char *makeDependfile;
 196 pid_t myPid;
 197 int makelevel;
 198
 199 Boolean forceJobs = FALSE;
 200
 201 /*
 202  * On some systems MACHINE is defined as something other than
 203  * what we want.
 204  */
 205 #ifdef FORCE_MACHINE
 206 # undef MACHINE
 207 # define MACHINE FORCE_MACHINE
 208 #endif
 209
 210 extern Lst parseIncPath;
 211
 212 /*
 213  * For compatibility with the POSIX version of MAKEFLAGS that includes
 214  * all the options with out -, convert flags to -f -l -a -g -s.
 215  */
 216 static char *
 217 explode(const char *flags)
 218 {
 219     size_t len;
 220     char *nf, *st;
 221     const char *f;
 222
 223     if (flags == NULL)
 224         return NULL;
 225
 226     for (f = flags; *f; f++)
 227         if (!isalpha((unsigned char)*f))
 228             break;
 229
 230     if (*f)
 231         return bmake_strdup(flags);
 232
 233     len = strlen(flags);
 234     st = nf = bmake_malloc(len * 3 + 1);
 235     while (*flags) {
 236         *nf++ = '-';
 237         *nf++ = *flags++;
 238         *nf++ = ' ';
 239     }
 240     *nf = '\0';
 241     return st;
 242 }
 243
 244 static void
 245 parse_debug_options(const char *argvalue)
 246 {
 247         const char *modules;
 248         const char *mode;
 249         char *fname;
 250         int len;
 251
 252         for (modules = argvalue; *modules; ++modules) {
 253                 switch (*modules) {
 254                 case 'A':
 255                         debug = ~0;
 256                         break;
 257                 case 'a':
 258                         debug |= DEBUG_ARCH;
 259                         break;
 260                 case 'C':
 261                         debug |= DEBUG_CWD;
 262                         break;
 263                 case 'c':
 264                         debug |= DEBUG_COND;
 265                         break;
 266                 case 'd':
 267                         debug |= DEBUG_DIR;
 268                         break;
 269                 case 'e':
 270                         debug |= DEBUG_ERROR;
 271                         break;
 272                 case 'f':
 273                         debug |= DEBUG_FOR;
 274                         break;
 275                 case 'g':
 276                         if (modules[1] == '1') {
 277                                 debug |= DEBUG_GRAPH1;
 278                                 ++modules;
 279                         }
 280                         else if (modules[1] == '2') {
 281                                 debug |= DEBUG_GRAPH2;
 282                                 ++modules;
 283                         }
 284                         else if (modules[1] == '3') {
 285                                 debug |= DEBUG_GRAPH3;
 286                                 ++modules;
 287                         }
 288                         break;
 289                 case 'j':
 290                         debug |= DEBUG_JOB;
 291                         break;
 292                 case 'l':
 293                         debug |= DEBUG_LOUD;
 294                         break;
 295                 case 'M':
 296                         debug |= DEBUG_META;
 297                         break;
 298                 case 'm':
 299                         debug |= DEBUG_MAKE;
 300                         break;
 301                 case 'n':
 302                         debug |= DEBUG_SCRIPT;
 303                         break;
 304                 case 'p':
 305                         debug |= DEBUG_PARSE;
 306                         break;
 307                 case 's':
 308                         debug |= DEBUG_SUFF;
 309                         break;
 310                 case 't':
 311                         debug |= DEBUG_TARG;
 312                         break;
 313                 case 'V':
 314                         debugVflag = TRUE;
 315                         break;
 316                 case 'v':
 317                         debug |= DEBUG_VAR;
 318                         break;
 319                 case 'x':
 320                         debug |= DEBUG_SHELL;
 321                         break;
 322                 case 'F':
 323                         if (debug_file != stdout && debug_file != stderr)
 324                                 fclose(debug_file);
 325                         if (*++modules == '+') {
 326                                 modules++;
 327                                 mode = "a";
 328                         } else
 329                                 mode = "w";
 330                         if (strcmp(modules, "stdout") == 0) {
 331                                 debug_file = stdout;
 332                                 goto debug_setbuf;
 333                         }
 334                         if (strcmp(modules, "stderr") == 0) {
 335                                 debug_file = stderr;
 336                                 goto debug_setbuf;
 337                         }
 338                         len = strlen(modules);
 339                         fname = malloc(len + 20);
 340                         memcpy(fname, modules, len + 1);
 341                         /* Let the filename be modified by the pid */
 342                         if (strcmp(fname + len - 3, ".%d") == 0)
 343                                 snprintf(fname + len - 2, 20, "%d", getpid());
 344                         debug_file = fopen(fname, mode);
 345                         if (!debug_file) {
 346                                 fprintf(stderr, "Cannot open debug file %s\n",
 347                                     fname);
 348                                 usage();
 349                         }
 350                         free(fname);
 351                         goto debug_setbuf;
 352                 default:
 353                         (void)fprintf(stderr,
 354                             "%s: illegal argument to d option -- %c\n",
 355                             progname, *modules);
 356                         usage();
 357                 }
 358         }
 359 debug_setbuf:
 360         /*
 361          * Make the debug_file unbuffered, and make
 362          * stdout line buffered (unless debugfile == stdout).
 363          */
 364         setvbuf(debug_file, NULL, _IONBF, 0);
 365         if (debug_file != stdout) {
 366                 setvbuf(stdout, NULL, _IOLBF, 0);
 367         }
 368 }
 369
 370 /*-
 371  * MainParseArgs --
 372  *      Parse a given argument vector. Called from main() and from
 373  *      Main_ParseArgLine() when the .MAKEFLAGS target is used.
 374  *
 375  *      XXX: Deal with command line overriding .MAKEFLAGS in makefile
 376  *
 377  * Results:
 378  *      None
 379  *
 380  * Side Effects:
 381  *      Various global and local flags will be set depending on the flags
 382  *      given
 383  */
 384 static void
 385 MainParseArgs(int argc, char **argv)
 386 {
 387         char *p;
 388         int c = '?';
 389         int arginc;
 390         char *argvalue;
 391         const char *getopt_def;
 392         char *optscan;
 393         Boolean inOption, dashDash = FALSE;
 394         char found_path[MAXPATHLEN + 1];        /* for searching for sys.mk */
 395
 396 #define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstw"
 397 /* Can't actually use getopt(3) because rescanning is not portable */
 398
 399         getopt_def = OPTFLAGS;
 400 rearg:
 401         inOption = FALSE;
 402         optscan = NULL;
 403         while(argc > 1) {
 404                 char *getopt_spec;
 405                 if(!inOption)
 406                         optscan = argv[1];
 407                 c = *optscan++;
 408                 arginc = 0;
 409                 if(inOption) {
 410                         if(c == '\0') {
 411                                 ++argv;
 412                                 --argc;
 413                                 inOption = FALSE;
 414                                 continue;
 415                         }
 416                 } else {
 417                         if (c != '-' || dashDash)
 418                                 break;
 419                         inOption = TRUE;
 420                         c = *optscan++;
 421                 }
 422                 /* '-' found at some earlier point */
 423                 getopt_spec = strchr(getopt_def, c);
 424                 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') {
 425                         /* -<something> found, and <something> should have an arg */
 426                         inOption = FALSE;
 427                         arginc = 1;
 428                         argvalue = optscan;
 429                         if(*argvalue == '\0') {
 430                                 if (argc < 3)
 431                                         goto noarg;
 432                                 argvalue = argv[2];
 433                                 arginc = 2;
 434                         }
 435                 } else {
 436                         argvalue = NULL;
 437                 }
 438                 switch(c) {
 439                 case '\0':
 440                         arginc = 1;
 441                         inOption = FALSE;
 442                         break;
 443                 case 'B':
 444                         compatMake = TRUE;
 445                         Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
 446                         Var_Set(MAKE_MODE, "compat", VAR_GLOBAL, 0);
 447                         break;
 448                 case 'C':
 449                         if (chdir(argvalue) == -1) {
 450                                 (void)fprintf(stderr,
 451                                               "%s: chdir %s: %s\n",
 452                                               progname, argvalue,
 453                                               strerror(errno));
 454                                 exit(1);
 455                         }
 456                         if (getcwd(curdir, MAXPATHLEN) == NULL) {
 457                                 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
 458                                 exit(2);
 459                         }
 460                         ignorePWD = TRUE;
 461                         break;
 462                 case 'D':
 463                         if (argvalue == NULL || argvalue[0] == 0) goto noarg;
 464                         Var_Set(argvalue, "1", VAR_GLOBAL, 0);
 465                         Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
 466                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 467                         break;
 468                 case 'I':
 469                         if (argvalue == NULL) goto noarg;
 470                         Parse_AddIncludeDir(argvalue);
 471                         Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
 472                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 473                         break;
 474                 case 'J':
 475                         if (argvalue == NULL) goto noarg;
 476                         if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) {
 477                             (void)fprintf(stderr,
 478                                 "%s: internal error -- J option malformed (%s)\n",
 479                                 progname, argvalue);
 480                                 usage();
 481                         }
 482                         if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
 483                             (fcntl(jp_1, F_GETFD, 0) < 0)) {
 484 #if 0
 485                             (void)fprintf(stderr,
 486                                 "%s: ###### warning -- J descriptors were closed!\n",
 487                                 progname);
 488                             exit(2);
 489 #endif
 490                             jp_0 = -1;
 491                             jp_1 = -1;
 492                             compatMake = TRUE;
 493                         } else {
 494                             Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
 495                             Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 496                             jobServer = TRUE;
 497                         }
 498                         break;
 499                 case 'N':
 500                         noExecute = TRUE;
 501                         noRecursiveExecute = TRUE;
 502                         Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL);
 503                         break;
 504                 case 'S':
 505                         keepgoing = FALSE;
 506                         Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
 507                         break;
 508                 case 'T':
 509                         if (argvalue == NULL) goto noarg;
 510                         tracefile = bmake_strdup(argvalue);
 511                         Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL);
 512                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 513                         break;
 514                 case 'V':
 515                         if (argvalue == NULL) goto noarg;
 516                         printVars = TRUE;
 517                         (void)Lst_AtEnd(variables, argvalue);
 518                         Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
 519                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 520                         break;
 521                 case 'W':
 522                         parseWarnFatal = TRUE;
 523                         break;
 524                 case 'X':
 525                         varNoExportEnv = TRUE;
 526                         Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL);
 527                         break;
 528                 case 'd':
 529                         if (argvalue == NULL) goto noarg;
 530                         /* If '-d-opts' don't pass to children */
 531                         if (argvalue[0] == '-')
 532                             argvalue++;
 533                         else {
 534                             Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
 535                             Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 536                         }
 537                         parse_debug_options(argvalue);
 538                         break;
 539                 case 'e':
 540                         checkEnvFirst = TRUE;
 541                         Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
 542                         break;
 543                 case 'f':
 544                         if (argvalue == NULL) goto noarg;
 545                         (void)Lst_AtEnd(makefiles, argvalue);
 546                         break;
 547                 case 'i':
 548                         ignoreErrors = TRUE;
 549                         Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
 550                         break;
 551                 case 'j':
 552                         if (argvalue == NULL) goto noarg;
 553                         forceJobs = TRUE;
 554                         maxJobs = strtol(argvalue, &p, 0);
 555                         if (*p != '\0' || maxJobs < 1) {
 556                                 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n",
 557                                     progname);
 558                                 exit(1);
 559                         }
 560                         Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
 561                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 562                         Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL, 0);
 563                         maxJobTokens = maxJobs;
 564                         break;
 565                 case 'k':
 566                         keepgoing = TRUE;
 567                         Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
 568                         break;
 569                 case 'm':
 570                         if (argvalue == NULL) goto noarg;
 571                         /* look for magic parent directory search string */
 572                         if (strncmp(".../", argvalue, 4) == 0) {
 573                                 if (!Dir_FindHereOrAbove(curdir, argvalue+4,
 574                                     found_path, sizeof(found_path)))
 575                                         break;          /* nothing doing */
 576                                 (void)Dir_AddDir(sysIncPath, found_path);
 577                         } else {
 578                                 (void)Dir_AddDir(sysIncPath, argvalue);
 579                         }
 580                         Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
 581                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 582                         break;
 583                 case 'n':
 584                         noExecute = TRUE;
 585                         Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
 586                         break;
 587                 case 'q':
 588                         queryFlag = TRUE;
 589                         /* Kind of nonsensical, wot? */
 590                         Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
 591                         break;
 592                 case 'r':
 593                         noBuiltins = TRUE;
 594                         Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
 595                         break;
 596                 case 's':
 597                         beSilent = TRUE;
 598                         Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
 599                         break;
 600                 case 't':
 601                         touchFlag = TRUE;
 602                         Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
 603                         break;
 604                 case 'w':
 605                         enterFlag = TRUE;
 606                         Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL);
 607                         break;
 608                 case '-':
 609                         dashDash = TRUE;
 610                         break;
 611                 default:
 612                 case '?':
 613 #ifndef MAKE_NATIVE
 614                         fprintf(stderr, "getopt(%s) -> %d (%c)\n",
 615                                 OPTFLAGS, c, c);
 616 #endif
 617                         usage();
 618                 }
 619                 argv += arginc;
 620                 argc -= arginc;
 621         }
 622
 623         oldVars = TRUE;
 624
 625         /*
 626          * See if the rest of the arguments are variable assignments and
 627          * perform them if so. Else take them to be targets and stuff them
 628          * on the end of the "create" list.
 629          */
 630         for (; argc > 1; ++argv, --argc)
 631                 if (Parse_IsVar(argv[1])) {
 632                         Parse_DoVar(argv[1], VAR_CMD);
 633                 } else {
 634                         if (!*argv[1])
 635                                 Punt("illegal (null) argument.");
 636                         if (*argv[1] == '-' && !dashDash)
 637                                 goto rearg;
 638                         (void)Lst_AtEnd(create, bmake_strdup(argv[1]));
 639                 }
 640
 641         return;
 642 noarg:
 643         (void)fprintf(stderr, "%s: option requires an argument -- %c\n",
 644             progname, c);
 645         usage();
 646 }
 647
 648 /*-
 649  * Main_ParseArgLine --
 650  *      Used by the parse module when a .MFLAGS or .MAKEFLAGS target
 651  *      is encountered and by main() when reading the .MAKEFLAGS envariable.
 652  *      Takes a line of arguments and breaks it into its
 653  *      component words and passes those words and the number of them to the
 654  *      MainParseArgs function.
 655  *      The line should have all its leading whitespace removed.
 656  *
 657  * Input:
 658  *      line            Line to fracture
 659  *
 660  * Results:
 661  *      None
 662  *
 663  * Side Effects:
 664  *      Only those that come from the various arguments.
 665  */
 666 void
 667 Main_ParseArgLine(const char *line)
 668 {
 669         char **argv;                    /* Manufactured argument vector */
 670         int argc;                       /* Number of arguments in argv */
 671         char *args;                     /* Space used by the args */
 672         char *buf, *p1;
 673         char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1);
 674         size_t len;
 675
 676         if (line == NULL)
 677                 return;
 678         for (; *line == ' '; ++line)
 679                 continue;
 680         if (!*line)
 681                 return;
 682
 683 #ifndef POSIX
 684         {
 685                 /*
 686                  * $MAKE may simply be naming the make(1) binary
 687                  */
 688                 char *cp;
 689
 690                 if (!(cp = strrchr(line, '/')))
 691                         cp = line;
 692                 if ((cp = strstr(cp, "make")) &&
 693                     strcmp(cp, "make") == 0)
 694                         return;
 695         }
 696 #endif
 697         buf = bmake_malloc(len = strlen(line) + strlen(argv0) + 2);
 698         (void)snprintf(buf, len, "%s %s", argv0, line);
 699         free(p1);
 700
 701         argv = brk_string(buf, &argc, TRUE, &args);
 702         if (argv == NULL) {
 703                 Error("Unterminated quoted string [%s]", buf);
 704                 free(buf);
 705                 return;
 706         }
 707         free(buf);
 708         MainParseArgs(argc, argv);
 709
 710         free(args);
 711         free(argv);
 712 }
 713
 714 Boolean
 715 Main_SetObjdir(const char *fmt, ...)
 716 {
 717         struct stat sb;
 718         char *p, *path;
 719         char buf[MAXPATHLEN + 1], pbuf[MAXPATHLEN + 1];
 720         Boolean rc = FALSE;
 721         va_list ap;
 722
 723         va_start(ap, fmt);
 724         vsnprintf(path = pbuf, MAXPATHLEN, fmt, ap);
 725         va_end(ap);
 726
 727         /* expand variable substitutions */
 728         if (strchr(path, '$') != 0) {
 729                 snprintf(buf, MAXPATHLEN, "%s", path);
 730                 path = p = Var_Subst(NULL, buf, VAR_GLOBAL, VARF_WANTRES);
 731         } else
 732                 p = NULL;
 733
 734         if (path[0] != '/') {
 735                 snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path);
 736                 path = buf;
 737         }
 738
 739         /* look for the directory and try to chdir there */
 740         if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
 741                 if (chdir(path)) {
 742                         (void)fprintf(stderr, "make warning: %s: %s.\n",
 743                                       path, strerror(errno));
 744                 } else {
 745                         strncpy(objdir, path, MAXPATHLEN);
 746                         Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0);
 747                         setenv("PWD", objdir, 1);
 748                         Dir_InitDot();
 749                         rc = TRUE;
 750                         if (enterFlag && strcmp(objdir, curdir) != 0)
 751                                 enterFlagObj = TRUE;
 752                 }
 753         }
 754
 755         free(p);
 756         return rc;
 757 }
 758
 759 static Boolean
 760 Main_SetVarObjdir(const char *var, const char *suffix)
 761 {
 762         char *p1, *path;
 763         if ((path = Var_Value(var, VAR_CMD, &p1)) == NULL)
 764                 return FALSE;
 765
 766         (void)Main_SetObjdir("%s%s", path, suffix);
 767         free(p1);
 768         return TRUE;
 769 }
 770
 771 /*-
 772  * ReadAllMakefiles --
 773  *      wrapper around ReadMakefile() to read all.
 774  *
 775  * Results:
 776  *      TRUE if ok, FALSE on error
 777  */
 778 static int
 779 ReadAllMakefiles(const void *p, const void *q)
 780 {
 781         return (ReadMakefile(p, q) == 0);
 782 }
 783
 784 int
 785 str2Lst_Append(Lst lp, char *str, const char *sep)
 786 {
 787     char *cp;
 788     int n;
 789
 790     if (!sep)
 791         sep = " \t";
 792
 793     for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) {
 794         (void)Lst_AtEnd(lp, cp);
 795         n++;
 796     }
 797     return (n);
 798 }
 799
 800 #ifdef SIGINFO
 801 /*ARGSUSED*/
 802 static void
 803 siginfo(int signo MAKE_ATTR_UNUSED)
 804 {
 805         char dir[MAXPATHLEN];
 806         char str[2 * MAXPATHLEN];
 807         int len;
 808         if (getcwd(dir, sizeof(dir)) == NULL)
 809                 return;
 810         len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir);
 811         if (len > 0)
 812                 (void)write(STDERR_FILENO, str, (size_t)len);
 813 }
 814 #endif
 815
 816 /*
 817  * Allow makefiles some control over the mode we run in.
 818  */
 819 void
 820 MakeMode(const char *mode)
 821 {
 822     char *mp = NULL;
 823
 824     if (!mode)
 825         mode = mp = Var_Subst(NULL, "${" MAKE_MODE ":tl}",
 826                               VAR_GLOBAL, VARF_WANTRES);
 827
 828     if (mode && *mode) {
 829         if (strstr(mode, "compat")) {
 830             compatMake = TRUE;
 831             forceJobs = FALSE;
 832         }
 833 #if USE_META
 834         if (strstr(mode, "meta"))
 835             meta_mode_init(mode);
 836 #endif
 837     }
 838
 839     free(mp);
 840 }
 841
 842 /*-
 843  * main --
 844  *      The main function, for obvious reasons. Initializes variables
 845  *      and a few modules, then parses the arguments give it in the
 846  *      environment and on the command line. Reads the system makefile
 847  *      followed by either Makefile, makefile or the file given by the
 848  *      -f argument. Sets the .MAKEFLAGS PMake variable based on all the
 849  *      flags it has received by then uses either the Make or the Compat
 850  *      module to create the initial list of targets.
 851  *
 852  * Results:
 853  *      If -q was given, exits -1 if anything was out-of-date. Else it exits
 854  *      0.
 855  *
 856  * Side Effects:
 857  *      The program exits when done. Targets are created. etc. etc. etc.
 858  */
 859 int
 860 main(int argc, char **argv)
 861 {
 862         Lst targs;      /* target nodes to create -- passed to Make_Init */
 863         Boolean outOfDate = FALSE;      /* FALSE if all targets up to date */
 864         struct stat sb, sa;
 865         char *p1, *path;
 866         char mdpath[MAXPATHLEN];
 867 #ifdef FORCE_MACHINE
 868         const char *machine = FORCE_MACHINE;
 869 #else
 870         const char *machine = getenv("MACHINE");
 871 #endif
 872         const char *machine_arch = getenv("MACHINE_ARCH");
 873         char *syspath = getenv("MAKESYSPATH");
 874         Lst sysMkPath;                  /* Path of sys.mk */
 875         char *cp = NULL, *start;
 876                                         /* avoid faults on read-only strings */
 877         static char defsyspath[] = _PATH_DEFSYSPATH;
 878         char found_path[MAXPATHLEN + 1];        /* for searching for sys.mk */
 879         struct timeval rightnow;                /* to initialize random seed */
 880         struct utsname utsname;
 881
 882         /* default to writing debug to stderr */
 883         debug_file = stderr;
 884
 885 #ifdef SIGINFO
 886         (void)bmake_signal(SIGINFO, siginfo);
 887 #endif
 888         /*
 889          * Set the seed to produce a different random sequence
 890          * on each program execution.
 891          */
 892         gettimeofday(&rightnow, NULL);
 893         srandom(rightnow.tv_sec + rightnow.tv_usec);
 894
 895         if ((progname = strrchr(argv[0], '/')) != NULL)
 896                 progname++;
 897         else
 898                 progname = argv[0];
 899 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE))
 900         /*
 901          * get rid of resource limit on file descriptors
 902          */
 903         {
 904                 struct rlimit rl;
 905                 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
 906                     rl.rlim_cur != rl.rlim_max) {
 907                         rl.rlim_cur = rl.rlim_max;
 908                         (void)setrlimit(RLIMIT_NOFILE, &rl);
 909                 }
 910         }
 911 #endif
 912
 913         if (uname(&utsname) == -1) {
 914             (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
 915                 strerror(errno));
 916             exit(2);
 917         }
 918
 919         /*
 920          * Get the name of this type of MACHINE from utsname
 921          * so we can share an executable for similar machines.
 922          * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
 923          *
 924          * Note that both MACHINE and MACHINE_ARCH are decided at
 925          * run-time.
 926          */
 927         if (!machine) {
 928 #ifdef MAKE_NATIVE
 929             machine = utsname.machine;
 930 #else
 931 #ifdef MAKE_MACHINE
 932             machine = MAKE_MACHINE;
 933 #else
 934             machine = "unknown";
 935 #endif
 936 #endif
 937         }
 938
 939         if (!machine_arch) {
 940 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) && defined(CTL_HW) && defined(HW_MACHINE_ARCH)
 941             static char machine_arch_buf[sizeof(utsname.machine)];
 942             int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
 943             size_t len = sizeof(machine_arch_buf);
 944
 945             if (sysctl(mib, __arraycount(mib), machine_arch_buf,
 946                     &len, NULL, 0) < 0) {
 947                 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname,
 948                     strerror(errno));
 949                 exit(2);
 950             }
 951
 952             machine_arch = machine_arch_buf;
 953 #else
 954 #ifndef MACHINE_ARCH
 955 #ifdef MAKE_MACHINE_ARCH
 956             machine_arch = MAKE_MACHINE_ARCH;
 957 #else
 958             machine_arch = "unknown";
 959 #endif
 960 #else
 961             machine_arch = MACHINE_ARCH;
 962 #endif
 963 #endif
 964         }
 965
 966         myPid = getpid();               /* remember this for vFork() */
 967
 968         /*
 969          * Just in case MAKEOBJDIR wants us to do something tricky.
 970          */
 971         Var_Init();             /* Initialize the lists of variables for
 972                                  * parsing arguments */
 973         Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL, 0);
 974         Var_Set("MACHINE", machine, VAR_GLOBAL, 0);
 975         Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0);
 976 #ifdef MAKE_VERSION
 977         Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0);
 978 #endif
 979         Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */
 980         /*
 981          * This is the traditional preference for makefiles.
 982          */
 983 #ifndef MAKEFILE_PREFERENCE_LIST
 984 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
 985 #endif
 986         Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST,
 987                 VAR_GLOBAL, 0);
 988         Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL, 0);
 989
 990         create = Lst_Init(FALSE);
 991         makefiles = Lst_Init(FALSE);
 992         printVars = FALSE;
 993         debugVflag = FALSE;
 994         variables = Lst_Init(FALSE);
 995         beSilent = FALSE;               /* Print commands as executed */
 996         ignoreErrors = FALSE;           /* Pay attention to non-zero returns */
 997         noExecute = FALSE;              /* Execute all commands */
 998         noRecursiveExecute = FALSE;     /* Execute all .MAKE targets */
 999         keepgoing = FALSE;              /* Stop on error */
1000         allPrecious = FALSE;            /* Remove targets when interrupted */
1001         deleteOnError = FALSE;          /* Historical default behavior */
1002         queryFlag = FALSE;              /* This is not just a check-run */
1003         noBuiltins = FALSE;             /* Read the built-in rules */
1004         touchFlag = FALSE;              /* Actually update targets */
1005         debug = 0;                      /* No debug verbosity, please. */
1006         jobsRunning = FALSE;
1007
1008         maxJobs = DEFMAXLOCAL;          /* Set default local max concurrency */
1009         maxJobTokens = maxJobs;
1010         compatMake = FALSE;             /* No compat mode */
1011         ignorePWD = FALSE;
1012
1013         /*
1014          * Initialize the parsing, directory and variable modules to prepare
1015          * for the reading of inclusion paths and variable settings on the
1016          * command line
1017          */
1018
1019         /*
1020          * Initialize various variables.
1021          *      MAKE also gets this name, for compatibility
1022          *      .MAKEFLAGS gets set to the empty string just in case.
1023          *      MFLAGS also gets initialized empty, for compatibility.
1024          */
1025         Parse_Init();
1026         if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) {
1027             /*
1028              * Leave alone if it is an absolute path, or if it does
1029              * not contain a '/' in which case we need to find it in
1030              * the path, like execvp(3) and the shells do.
1031              */
1032             p1 = argv[0];
1033         } else {
1034             /*
1035              * A relative path, canonicalize it.
1036              */
1037             p1 = cached_realpath(argv[0], mdpath);
1038             if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) {
1039                 p1 = argv[0];           /* realpath failed */
1040             }
1041         }
1042         Var_Set("MAKE", p1, VAR_GLOBAL, 0);
1043         Var_Set(".MAKE", p1, VAR_GLOBAL, 0);
1044         Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0);
1045         Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0);
1046         Var_Set("MFLAGS", "", VAR_GLOBAL, 0);
1047         Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0);
1048         /* some makefiles need to know this */
1049         Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD, 0);
1050
1051         /*
1052          * Set some other useful macros
1053          */
1054         {
1055             char tmp[64], *ep;
1056
1057             makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0;
1058             if (makelevel < 0)
1059                 makelevel = 0;
1060             snprintf(tmp, sizeof(tmp), "%d", makelevel);
1061             Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL, 0);
1062             snprintf(tmp, sizeof(tmp), "%u", myPid);
1063             Var_Set(".MAKE.PID", tmp, VAR_GLOBAL, 0);
1064             snprintf(tmp, sizeof(tmp), "%u", getppid());
1065             Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL, 0);
1066         }
1067         if (makelevel > 0) {
1068                 char pn[1024];
1069                 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel);
1070                 progname = bmake_strdup(pn);
1071         }
1072
1073 #ifdef USE_META
1074         meta_init();
1075 #endif
1076         Dir_Init(NULL);         /* Dir_* safe to call from MainParseArgs */
1077
1078         /*
1079          * First snag any flags out of the MAKE environment variable.
1080          * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
1081          * in a different format).
1082          */
1083 #ifdef POSIX
1084         p1 = explode(getenv("MAKEFLAGS"));
1085         Main_ParseArgLine(p1);
1086         free(p1);
1087 #else
1088         Main_ParseArgLine(getenv("MAKE"));
1089 #endif
1090
1091         /*
1092          * Find where we are (now).
1093          * We take care of PWD for the automounter below...
1094          */
1095         if (getcwd(curdir, MAXPATHLEN) == NULL) {
1096                 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1097                     progname, strerror(errno));
1098                 exit(2);
1099         }
1100
1101         MainParseArgs(argc, argv);
1102
1103         if (enterFlag)
1104                 printf("%s: Entering directory `%s'\n", progname, curdir);
1105
1106         /*
1107          * Verify that cwd is sane.
1108          */
1109         if (stat(curdir, &sa) == -1) {
1110             (void)fprintf(stderr, "%s: %s: %s.\n",
1111                  progname, curdir, strerror(errno));
1112             exit(2);
1113         }
1114
1115         /*
1116          * All this code is so that we know where we are when we start up
1117          * on a different machine with pmake.
1118          * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1119          * since the value of curdir can vary depending on how we got
1120          * here.  Ie sitting at a shell prompt (shell that provides $PWD)
1121          * or via subdir.mk in which case its likely a shell which does
1122          * not provide it.
1123          * So, to stop it breaking this case only, we ignore PWD if
1124          * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform.
1125          */
1126 #ifndef NO_PWD_OVERRIDE
1127         if (!ignorePWD) {
1128                 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL;
1129
1130                 if ((pwd = getenv("PWD")) != NULL &&
1131                     Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) {
1132                         const char *makeobjdir = Var_Value("MAKEOBJDIR",
1133                             VAR_CMD, &ptmp2);
1134
1135                         if (makeobjdir == NULL || !strchr(makeobjdir, '$')) {
1136                                 if (stat(pwd, &sb) == 0 &&
1137                                     sa.st_ino == sb.st_ino &&
1138                                     sa.st_dev == sb.st_dev)
1139                                         (void)strncpy(curdir, pwd, MAXPATHLEN);
1140                         }
1141                 }
1142                 free(ptmp1);
1143                 free(ptmp2);
1144         }
1145 #endif
1146         Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0);
1147
1148         /*
1149          * Find the .OBJDIR.  If MAKEOBJDIRPREFIX, or failing that,
1150          * MAKEOBJDIR is set in the environment, try only that value
1151          * and fall back to .CURDIR if it does not exist.
1152          *
1153          * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1154          * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order.  If none
1155          * of these paths exist, just use .CURDIR.
1156          */
1157         Dir_Init(curdir);
1158         (void)Main_SetObjdir("%s", curdir);
1159
1160         if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) &&
1161             !Main_SetVarObjdir("MAKEOBJDIR", "") &&
1162             !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1163             !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) &&
1164             !Main_SetObjdir("%s", _PATH_OBJDIR))
1165                 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir);
1166
1167         /*
1168          * Initialize archive, target and suffix modules in preparation for
1169          * parsing the makefile(s)
1170          */
1171         Arch_Init();
1172         Targ_Init();
1173         Suff_Init();
1174         Trace_Init(tracefile);
1175
1176         DEFAULT = NULL;
1177         (void)time(&now);
1178
1179         Trace_Log(MAKESTART, NULL);
1180
1181         /*
1182          * Set up the .TARGETS variable to contain the list of targets to be
1183          * created. If none specified, make the variable empty -- the parser
1184          * will fill the thing in with the default or .MAIN target.
1185          */
1186         if (!Lst_IsEmpty(create)) {
1187                 LstNode ln;
1188
1189                 for (ln = Lst_First(create); ln != NULL;
1190                     ln = Lst_Succ(ln)) {
1191                         char *name = (char *)Lst_Datum(ln);
1192
1193                         Var_Append(".TARGETS", name, VAR_GLOBAL);
1194                 }
1195         } else
1196                 Var_Set(".TARGETS", "", VAR_GLOBAL, 0);
1197
1198
1199         /*
1200          * If no user-supplied system path was given (through the -m option)
1201          * add the directories from the DEFSYSPATH (more than one may be given
1202          * as dir1:...:dirn) to the system include path.
1203          */
1204         if (syspath == NULL || *syspath == '\0')
1205                 syspath = defsyspath;
1206         else
1207                 syspath = bmake_strdup(syspath);
1208
1209         for (start = syspath; *start != '\0'; start = cp) {
1210                 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1211                         continue;
1212                 if (*cp == ':') {
1213                         *cp++ = '\0';
1214                 }
1215                 /* look for magic parent directory search string */
1216                 if (strncmp(".../", start, 4) != 0) {
1217                         (void)Dir_AddDir(defIncPath, start);
1218                 } else {
1219                         if (Dir_FindHereOrAbove(curdir, start+4,
1220                             found_path, sizeof(found_path))) {
1221                                 (void)Dir_AddDir(defIncPath, found_path);
1222                         }
1223                 }
1224         }
1225         if (syspath != defsyspath)
1226                 free(syspath);
1227
1228         /*
1229          * Read in the built-in rules first, followed by the specified
1230          * makefile, if it was (makefile != NULL), or the default
1231          * makefile and Makefile, in that order, if it wasn't.
1232          */
1233         if (!noBuiltins) {
1234                 LstNode ln;
1235
1236                 sysMkPath = Lst_Init(FALSE);
1237                 Dir_Expand(_PATH_DEFSYSMK,
1238                            Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath,
1239                            sysMkPath);
1240                 if (Lst_IsEmpty(sysMkPath))
1241                         Fatal("%s: no system rules (%s).", progname,
1242                             _PATH_DEFSYSMK);
1243                 ln = Lst_Find(sysMkPath, NULL, ReadMakefile);
1244                 if (ln == NULL)
1245                         Fatal("%s: cannot open %s.", progname,
1246                             (char *)Lst_Datum(ln));
1247         }
1248
1249         if (!Lst_IsEmpty(makefiles)) {
1250                 LstNode ln;
1251
1252                 ln = Lst_Find(makefiles, NULL, ReadAllMakefiles);
1253                 if (ln != NULL)
1254                         Fatal("%s: cannot open %s.", progname,
1255                             (char *)Lst_Datum(ln));
1256         } else {
1257             p1 = Var_Subst(NULL, "${" MAKEFILE_PREFERENCE "}",
1258                 VAR_CMD, VARF_WANTRES);
1259             if (p1) {
1260                 (void)str2Lst_Append(makefiles, p1, NULL);
1261                 (void)Lst_Find(makefiles, NULL, ReadMakefile);
1262                 free(p1);
1263             }
1264         }
1265
1266         /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1267         if (!noBuiltins || !printVars) {
1268             makeDependfile = Var_Subst(NULL, "${.MAKE.DEPENDFILE:T}",
1269                 VAR_CMD, VARF_WANTRES);
1270             doing_depend = TRUE;
1271             (void)ReadMakefile(makeDependfile, NULL);
1272             doing_depend = FALSE;
1273         }
1274
1275         if (enterFlagObj)
1276                 printf("%s: Entering directory `%s'\n", progname, objdir);
1277
1278         MakeMode(NULL);
1279
1280         Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
1281         free(p1);
1282
1283         if (!forceJobs && !compatMake &&
1284             Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) {
1285             char *value;
1286             int n;
1287
1288             value = Var_Subst(NULL, "${.MAKE.JOBS}", VAR_GLOBAL, VARF_WANTRES);
1289             n = strtol(value, NULL, 0);
1290             if (n < 1) {
1291                 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n",
1292                     progname);
1293                 exit(1);
1294             }
1295             if (n != maxJobs) {
1296                 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
1297                 Var_Append(MAKEFLAGS, value, VAR_GLOBAL);
1298             }
1299             maxJobs = n;
1300             maxJobTokens = maxJobs;
1301             forceJobs = TRUE;
1302             free(value);
1303         }
1304
1305         /*
1306          * Be compatible if user did not specify -j and did not explicitly
1307          * turned compatibility on
1308          */
1309         if (!compatMake && !forceJobs) {
1310             compatMake = TRUE;
1311         }
1312
1313         if (!compatMake)
1314             Job_ServerStart(maxJobTokens, jp_0, jp_1);
1315         if (DEBUG(JOB))
1316             fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1317                 jp_0, jp_1, maxJobs, maxJobTokens, compatMake);
1318
1319         if (!printVars)
1320             Main_ExportMAKEFLAGS(TRUE); /* initial export */
1321
1322         /*
1323          * For compatibility, look at the directories in the VPATH variable
1324          * and add them to the search path, if the variable is defined. The
1325          * variable's value is in the same format as the PATH envariable, i.e.
1326          * <directory>:<directory>:<directory>...
1327          */
1328         if (Var_Exists("VPATH", VAR_CMD)) {
1329                 char *vpath, savec;
1330                 /*
1331                  * GCC stores string constants in read-only memory, but
1332                  * Var_Subst will want to write this thing, so store it
1333                  * in an array
1334                  */
1335                 static char VPATH[] = "${VPATH}";
1336
1337                 vpath = Var_Subst(NULL, VPATH, VAR_CMD, VARF_WANTRES);
1338                 path = vpath;
1339                 do {
1340                         /* skip to end of directory */
1341                         for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1342                                 continue;
1343                         /* Save terminator character so know when to stop */
1344                         savec = *cp;
1345                         *cp = '\0';
1346                         /* Add directory to search path */
1347                         (void)Dir_AddDir(dirSearchPath, path);
1348                         *cp = savec;
1349                         path = cp + 1;
1350                 } while (savec == ':');
1351                 free(vpath);
1352         }
1353
1354         /*
1355          * Now that all search paths have been read for suffixes et al, it's
1356          * time to add the default search path to their lists...
1357          */
1358         Suff_DoPaths();
1359
1360         /*
1361          * Propagate attributes through :: dependency lists.
1362          */
1363         Targ_Propagate();
1364
1365         /* print the initial graph, if the user requested it */
1366         if (DEBUG(GRAPH1))
1367                 Targ_PrintGraph(1);
1368
1369         /* print the values of any variables requested by the user */
1370         if (printVars) {
1371                 LstNode ln;
1372                 Boolean expandVars;
1373
1374                 if (debugVflag)
1375                         expandVars = FALSE;
1376                 else
1377                         expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE);
1378                 for (ln = Lst_First(variables); ln != NULL;
1379                     ln = Lst_Succ(ln)) {
1380                         char *var = (char *)Lst_Datum(ln);
1381                         char *value;
1382
1383                         if (strchr(var, '$')) {
1384                             value = p1 = Var_Subst(NULL, var, VAR_GLOBAL,
1385                                                    VARF_WANTRES);
1386                         } else if (expandVars) {
1387                                 char tmp[128];
1388
1389                                 if (snprintf(tmp, sizeof(tmp), "${%s}", var) >= (int)(sizeof(tmp)))
1390                                         Fatal("%s: variable name too big: %s",
1391                                               progname, var);
1392                                 value = p1 = Var_Subst(NULL, tmp, VAR_GLOBAL,
1393                                                        VARF_WANTRES);
1394                         } else {
1395                                 value = Var_Value(var, VAR_GLOBAL, &p1);
1396                         }
1397                         printf("%s\n", value ? value : "");
1398                         free(p1);
1399                 }
1400         } else {
1401                 /*
1402                  * Have now read the entire graph and need to make a list of
1403                  * targets to create. If none was given on the command line,
1404                  * we consult the parsing module to find the main target(s)
1405                  * to create.
1406                  */
1407                 if (Lst_IsEmpty(create))
1408                         targs = Parse_MainName();
1409                 else
1410                         targs = Targ_FindList(create, TARG_CREATE);
1411
1412                 if (!compatMake) {
1413                         /*
1414                          * Initialize job module before traversing the graph
1415                          * now that any .BEGIN and .END targets have been read.
1416                          * This is done only if the -q flag wasn't given
1417                          * (to prevent the .BEGIN from being executed should
1418                          * it exist).
1419                          */
1420                         if (!queryFlag) {
1421                                 Job_Init();
1422                                 jobsRunning = TRUE;
1423                         }
1424
1425                         /* Traverse the graph, checking on all the targets */
1426                         outOfDate = Make_Run(targs);
1427                 } else {
1428                         /*
1429                          * Compat_Init will take care of creating all the
1430                          * targets as well as initializing the module.
1431                          */
1432                         Compat_Run(targs);
1433                 }
1434         }
1435
1436 #ifdef CLEANUP
1437         Lst_Destroy(targs, NULL);
1438         Lst_Destroy(variables, NULL);
1439         Lst_Destroy(makefiles, NULL);
1440         Lst_Destroy(create, (FreeProc *)free);
1441 #endif
1442
1443         /* print the graph now it's been processed if the user requested it */
1444         if (DEBUG(GRAPH2))
1445                 Targ_PrintGraph(2);
1446
1447         Trace_Log(MAKEEND, 0);
1448
1449         if (enterFlagObj)
1450                 printf("%s: Leaving directory `%s'\n", progname, objdir);
1451         if (enterFlag)
1452                 printf("%s: Leaving directory `%s'\n", progname, curdir);
1453
1454 #ifdef USE_META
1455         meta_finish();
1456 #endif
1457         Suff_End();
1458         Targ_End();
1459         Arch_End();
1460         Var_End();
1461         Parse_End();
1462         Dir_End();
1463         Job_End();
1464         Trace_End();
1465
1466         return outOfDate ? 1 : 0;
1467 }
1468
1469 /*-
1470  * ReadMakefile  --
1471  *      Open and parse the given makefile.
1472  *
1473  * Results:
1474  *      0 if ok. -1 if couldn't open file.
1475  *
1476  * Side Effects:
1477  *      lots
1478  */
1479 static int
1480 ReadMakefile(const void *p, const void *q MAKE_ATTR_UNUSED)
1481 {
1482         const char *fname = p;          /* makefile to read */
1483         int fd;
1484         size_t len = MAXPATHLEN;
1485         char *name, *path = bmake_malloc(len);
1486
1487         if (!strcmp(fname, "-")) {
1488                 Parse_File(NULL /*stdin*/, -1);
1489                 Var_Set("MAKEFILE", "", VAR_INTERNAL, 0);
1490         } else {
1491                 /* if we've chdir'd, rebuild the path name */
1492                 if (strcmp(curdir, objdir) && *fname != '/') {
1493                         size_t plen = strlen(curdir) + strlen(fname) + 2;
1494                         if (len < plen)
1495                                 path = bmake_realloc(path, len = 2 * plen);
1496
1497                         (void)snprintf(path, len, "%s/%s", curdir, fname);
1498                         fd = open(path, O_RDONLY);
1499                         if (fd != -1) {
1500                                 fname = path;
1501                                 goto found;
1502                         }
1503
1504                         /* If curdir failed, try objdir (ala .depend) */
1505                         plen = strlen(objdir) + strlen(fname) + 2;
1506                         if (len < plen)
1507                                 path = bmake_realloc(path, len = 2 * plen);
1508                         (void)snprintf(path, len, "%s/%s", objdir, fname);
1509                         fd = open(path, O_RDONLY);
1510                         if (fd != -1) {
1511                                 fname = path;
1512                                 goto found;
1513                         }
1514                 } else {
1515                         fd = open(fname, O_RDONLY);
1516                         if (fd != -1)
1517                                 goto found;
1518                 }
1519                 /* look in -I and system include directories. */
1520                 name = Dir_FindFile(fname, parseIncPath);
1521                 if (!name)
1522                         name = Dir_FindFile(fname,
1523                                 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
1524                 if (!name || (fd = open(name, O_RDONLY)) == -1) {
1525                         free(name);
1526                         free(path);
1527                         return(-1);
1528                 }
1529                 fname = name;
1530                 /*
1531                  * set the MAKEFILE variable desired by System V fans -- the
1532                  * placement of the setting here means it gets set to the last
1533                  * makefile specified, as it is set by SysV make.
1534                  */
1535 found:
1536                 if (!doing_depend)
1537                         Var_Set("MAKEFILE", fname, VAR_INTERNAL, 0);
1538                 Parse_File(fname, fd);
1539         }
1540         free(path);
1541         return(0);
1542 }
1543
1544
1545
1546 /*-
1547  * Cmd_Exec --
1548  *      Execute the command in cmd, and return the output of that command
1549  *      in a string.
1550  *
1551  * Results:
1552  *      A string containing the output of the command, or the empty string
1553  *      If errnum is not NULL, it contains the reason for the command failure
1554  *
1555  * Side Effects:
1556  *      The string must be freed by the caller.
1557  */
1558 char *
1559 Cmd_Exec(const char *cmd, const char **errnum)
1560 {
1561     const char  *args[4];       /* Args for invoking the shell */
1562     int         fds[2];         /* Pipe streams */
1563     int         cpid;           /* Child PID */
1564     int         pid;            /* PID from wait() */
1565     char        *res;           /* result */
1566     WAIT_T      status;         /* command exit status */
1567     Buffer      buf;            /* buffer to store the result */
1568     char        *cp;
1569     int         cc;             /* bytes read, or -1 */
1570     int         savederr;       /* saved errno */
1571
1572
1573     *errnum = NULL;
1574
1575     if (!shellName)
1576         Shell_Init();
1577     /*
1578      * Set up arguments for shell
1579      */
1580     args[0] = shellName;
1581     args[1] = "-c";
1582     args[2] = cmd;
1583     args[3] = NULL;
1584
1585     /*
1586      * Open a pipe for fetching its output
1587      */
1588     if (pipe(fds) == -1) {
1589         *errnum = "Couldn't create pipe for \"%s\"";
1590         goto bad;
1591     }
1592
1593     /*
1594      * Fork
1595      */
1596     switch (cpid = vFork()) {
1597     case 0:
1598         /*
1599          * Close input side of pipe
1600          */
1601         (void)close(fds[0]);
1602
1603         /*
1604          * Duplicate the output stream to the shell's output, then
1605          * shut the extra thing down. Note we don't fetch the error
1606          * stream...why not? Why?
1607          */
1608         (void)dup2(fds[1], 1);
1609         (void)close(fds[1]);
1610
1611         Var_ExportVars();
1612
1613         (void)execv(shellPath, UNCONST(args));
1614         _exit(1);
1615         /*NOTREACHED*/
1616
1617     case -1:
1618         *errnum = "Couldn't exec \"%s\"";
1619         goto bad;
1620
1621     default:
1622         /*
1623          * No need for the writing half
1624          */
1625         (void)close(fds[1]);
1626
1627         savederr = 0;
1628         Buf_Init(&buf, 0);
1629
1630         do {
1631             char   result[BUFSIZ];
1632             cc = read(fds[0], result, sizeof(result));
1633             if (cc > 0)
1634                 Buf_AddBytes(&buf, cc, result);
1635         }
1636         while (cc > 0 || (cc == -1 && errno == EINTR));
1637         if (cc == -1)
1638             savederr = errno;
1639
1640         /*
1641          * Close the input side of the pipe.
1642          */
1643         (void)close(fds[0]);
1644
1645         /*
1646          * Wait for the process to exit.
1647          */
1648         while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) {
1649             JobReapChild(pid, status, FALSE);
1650             continue;
1651         }
1652         cc = Buf_Size(&buf);
1653         res = Buf_Destroy(&buf, FALSE);
1654
1655         if (savederr != 0)
1656             *errnum = "Couldn't read shell's output for \"%s\"";
1657
1658         if (WIFSIGNALED(status))
1659             *errnum = "\"%s\" exited on a signal";
1660         else if (WEXITSTATUS(status) != 0)
1661             *errnum = "\"%s\" returned non-zero status";
1662
1663         /*
1664          * Null-terminate the result, convert newlines to spaces and
1665          * install it in the variable.
1666          */
1667         res[cc] = '\0';
1668         cp = &res[cc];
1669
1670         if (cc > 0 && *--cp == '\n') {
1671             /*
1672              * A final newline is just stripped
1673              */
1674             *cp-- = '\0';
1675         }
1676         while (cp >= res) {
1677             if (*cp == '\n') {
1678                 *cp = ' ';
1679             }
1680             cp--;
1681         }
1682         break;
1683     }
1684     return res;
1685 bad:
1686     res = bmake_malloc(1);
1687     *res = '\0';
1688     return res;
1689 }
1690
1691 /*-
1692  * Error --
1693  *      Print an error message given its format.
1694  *
1695  * Results:
1696  *      None.
1697  *
1698  * Side Effects:
1699  *      The message is printed.
1700  */
1701 /* VARARGS */
1702 void
1703 Error(const char *fmt, ...)
1704 {
1705         va_list ap;
1706         FILE *err_file;
1707
1708         err_file = debug_file;
1709         if (err_file == stdout)
1710                 err_file = stderr;
1711         (void)fflush(stdout);
1712         for (;;) {
1713                 va_start(ap, fmt);
1714                 fprintf(err_file, "%s: ", progname);
1715                 (void)vfprintf(err_file, fmt, ap);
1716                 va_end(ap);
1717                 (void)fprintf(err_file, "\n");
1718                 (void)fflush(err_file);
1719                 if (err_file == stderr)
1720                         break;
1721                 err_file = stderr;
1722         }
1723 }
1724
1725 /*-
1726  * Fatal --
1727  *      Produce a Fatal error message. If jobs are running, waits for them
1728  *      to finish.
1729  *
1730  * Results:
1731  *      None
1732  *
1733  * Side Effects:
1734  *      The program exits
1735  */
1736 /* VARARGS */
1737 void
1738 Fatal(const char *fmt, ...)
1739 {
1740         va_list ap;
1741
1742         va_start(ap, fmt);
1743         if (jobsRunning)
1744                 Job_Wait();
1745
1746         (void)fflush(stdout);
1747         (void)vfprintf(stderr, fmt, ap);
1748         va_end(ap);
1749         (void)fprintf(stderr, "\n");
1750         (void)fflush(stderr);
1751
1752         PrintOnError(NULL, NULL);
1753
1754         if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1755                 Targ_PrintGraph(2);
1756         Trace_Log(MAKEERROR, 0);
1757         exit(2);                /* Not 1 so -q can distinguish error */
1758 }
1759
1760 /*
1761  * Punt --
1762  *      Major exception once jobs are being created. Kills all jobs, prints
1763  *      a message and exits.
1764  *
1765  * Results:
1766  *      None
1767  *
1768  * Side Effects:
1769  *      All children are killed indiscriminately and the program Lib_Exits
1770  */
1771 /* VARARGS */
1772 void
1773 Punt(const char *fmt, ...)
1774 {
1775         va_list ap;
1776
1777         va_start(ap, fmt);
1778         (void)fflush(stdout);
1779         (void)fprintf(stderr, "%s: ", progname);
1780         (void)vfprintf(stderr, fmt, ap);
1781         va_end(ap);
1782         (void)fprintf(stderr, "\n");
1783         (void)fflush(stderr);
1784
1785         PrintOnError(NULL, NULL);
1786
1787         DieHorribly();
1788 }
1789
1790 /*-
1791  * DieHorribly --
1792  *      Exit without giving a message.
1793  *
1794  * Results:
1795  *      None
1796  *
1797  * Side Effects:
1798  *      A big one...
1799  */
1800 void
1801 DieHorribly(void)
1802 {
1803         if (jobsRunning)
1804                 Job_AbortAll();
1805         if (DEBUG(GRAPH2))
1806                 Targ_PrintGraph(2);
1807         Trace_Log(MAKEERROR, 0);
1808         exit(2);                /* Not 1, so -q can distinguish error */
1809 }
1810
1811 /*
1812  * Finish --
1813  *      Called when aborting due to errors in child shell to signal
1814  *      abnormal exit.
1815  *
1816  * Results:
1817  *      None
1818  *
1819  * Side Effects:
1820  *      The program exits
1821  */
1822 void
1823 Finish(int errors)
1824                         /* number of errors encountered in Make_Make */
1825 {
1826         Fatal("%d error%s", errors, errors == 1 ? "" : "s");
1827 }
1828
1829 /*
1830  * eunlink --
1831  *      Remove a file carefully, avoiding directories.
1832  */
1833 int
1834 eunlink(const char *file)
1835 {
1836         struct stat st;
1837
1838         if (lstat(file, &st) == -1)
1839                 return -1;
1840
1841         if (S_ISDIR(st.st_mode)) {
1842                 errno = EISDIR;
1843                 return -1;
1844         }
1845         return unlink(file);
1846 }
1847
1848 /*
1849  * execError --
1850  *      Print why exec failed, avoiding stdio.
1851  */
1852 void
1853 execError(const char *af, const char *av)
1854 {
1855 #ifdef USE_IOVEC
1856         int i = 0;
1857         struct iovec iov[8];
1858 #define IOADD(s) \
1859         (void)(iov[i].iov_base = UNCONST(s), \
1860             iov[i].iov_len = strlen(iov[i].iov_base), \
1861             i++)
1862 #else
1863 #define IOADD(s) (void)write(2, s, strlen(s))
1864 #endif
1865
1866         IOADD(progname);
1867         IOADD(": ");
1868         IOADD(af);
1869         IOADD("(");
1870         IOADD(av);
1871         IOADD(") failed (");
1872         IOADD(strerror(errno));
1873         IOADD(")\n");
1874
1875 #ifdef USE_IOVEC
1876         while (writev(2, iov, 8) == -1 && errno == EAGAIN)
1877             continue;
1878 #endif
1879 }
1880
1881 /*
1882  * usage --
1883  *      exit with usage message
1884  */
1885 static void
1886 usage(void)
1887 {
1888         char *p;
1889         if ((p = strchr(progname, '[')) != NULL)
1890             *p = '\0';
1891
1892         (void)fprintf(stderr,
1893 "usage: %s [-BeikNnqrstWwX] \n\
1894             [-C directory] [-D variable] [-d flags] [-f makefile]\n\
1895             [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\
1896             [-V variable] [variable=value] [target ...]\n", progname);
1897         exit(2);
1898 }
1899
1900
1901 /*
1902  * realpath(3) can get expensive, cache results...
1903  */
1904 char *
1905 cached_realpath(const char *pathname, char *resolved)
1906 {
1907     static GNode *cache;
1908     char *rp, *cp;
1909
1910     if (!pathname || !pathname[0])
1911         return NULL;
1912
1913     if (!cache) {
1914         cache = Targ_NewGN("Realpath");
1915 #ifndef DEBUG_REALPATH_CACHE
1916         cache->flags = INTERNAL;
1917 #endif
1918     }
1919
1920     if ((rp = Var_Value(pathname, cache, &cp)) != NULL) {
1921         /* a hit */
1922         strlcpy(resolved, rp, MAXPATHLEN);
1923     } else if ((rp = realpath(pathname, resolved)) != NULL) {
1924         Var_Set(pathname, rp, cache, 0);
1925     }
1926     free(cp);
1927     return rp ? resolved : NULL;
1928 }
1929
1930 int
1931 PrintAddr(void *a, void *b)
1932 {
1933     printf("%lx ", (unsigned long) a);
1934     return b ? 0 : 0;
1935 }
1936
1937
1938 static int
1939 addErrorCMD(void *cmdp, void *gnp MAKE_ATTR_UNUSED)
1940 {
1941     if (cmdp == NULL)
1942         return 1;                       /* stop */
1943     Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL);
1944     return 0;
1945 }
1946
1947 void
1948 PrintOnError(GNode *gn, const char *s)
1949 {
1950     static GNode *en = NULL;
1951     char tmp[64];
1952     char *cp;
1953
1954     if (s)
1955         printf("%s", s);
1956
1957     printf("\n%s: stopped in %s\n", progname, curdir);
1958
1959     if (en)
1960         return;                         /* we've been here! */
1961     if (gn) {
1962         /*
1963          * We can print this even if there is no .ERROR target.
1964          */
1965         Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL, 0);
1966         Var_Delete(".ERROR_CMD", VAR_GLOBAL);
1967         Lst_ForEach(gn->commands, addErrorCMD, gn);
1968     }
1969     strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
1970             sizeof(tmp) - 1);
1971     cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
1972     if (cp) {
1973         if (*cp)
1974             printf("%s", cp);
1975         free(cp);
1976     }
1977     fflush(stdout);
1978
1979     /*
1980      * Finally, see if there is a .ERROR target, and run it if so.
1981      */
1982     en = Targ_FindNode(".ERROR", TARG_NOCREATE);
1983     if (en) {
1984         en->type |= OP_SPECIAL;
1985         Compat_Make(en, en);
1986     }
1987 }
1988
1989 void
1990 Main_ExportMAKEFLAGS(Boolean first)
1991 {
1992     static int once = 1;
1993     char tmp[64];
1994     char *s;
1995
1996     if (once != first)
1997         return;
1998     once = 0;
1999
2000     strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2001             sizeof(tmp));
2002     s = Var_Subst(NULL, tmp, VAR_CMD, VARF_WANTRES);
2003     if (s && *s) {
2004 #ifdef POSIX
2005         setenv("MAKEFLAGS", s, 1);
2006 #else
2007         setenv("MAKE", s, 1);
2008 #endif
2009     }
2010 }
2011
2012 char *
2013 getTmpdir(void)
2014 {
2015     static char *tmpdir = NULL;
2016
2017     if (!tmpdir) {
2018         struct stat st;
2019
2020         /*
2021          * Honor $TMPDIR but only if it is valid.
2022          * Ensure it ends with /.
2023          */
2024         tmpdir = Var_Subst(NULL, "${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL,
2025                            VARF_WANTRES);
2026         if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2027             free(tmpdir);
2028             tmpdir = bmake_strdup(_PATH_TMP);
2029         }
2030     }
2031     return tmpdir;
2032 }
2033
2034 /*
2035  * Create and open a temp file using "pattern".
2036  * If "fnamep" is provided set it to a copy of the filename created.
2037  * Otherwise unlink the file once open.
2038  */
2039 int
2040 mkTempFile(const char *pattern, char **fnamep)
2041 {
2042     static char *tmpdir = NULL;
2043     char tfile[MAXPATHLEN];
2044     int fd;
2045
2046     if (!pattern)
2047         pattern = TMPPAT;
2048     if (!tmpdir)
2049         tmpdir = getTmpdir();
2050     if (pattern[0] == '/') {
2051         snprintf(tfile, sizeof(tfile), "%s", pattern);
2052     } else {
2053         snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern);
2054     }
2055     if ((fd = mkstemp(tfile)) < 0)
2056         Punt("Could not create temporary file %s: %s", tfile, strerror(errno));
2057     if (fnamep) {
2058         *fnamep = bmake_strdup(tfile);
2059     } else {
2060         unlink(tfile);                  /* we just want the descriptor */
2061     }
2062     return fd;
2063 }
2064
2065 /*
2066  * Convert a string representation of a boolean.
2067  * Anything that looks like "No", "False", "Off", "0" etc,
2068  * is FALSE, otherwise TRUE.
2069  */
2070 Boolean
2071 s2Boolean(const char *s, Boolean bf)
2072 {
2073     if (s) {
2074         switch(*s) {
2075         case '\0':                      /* not set - the default wins */
2076             break;
2077         case '0':
2078         case 'F':
2079         case 'f':
2080         case 'N':
2081         case 'n':
2082             bf = FALSE;
2083             break;
2084         case 'O':
2085         case 'o':
2086             switch (s[1]) {
2087             case 'F':
2088             case 'f':
2089                 bf = FALSE;
2090                 break;
2091             default:
2092                 bf = TRUE;
2093                 break;
2094             }
2095             break;
2096         default:
2097             bf = TRUE;
2098             break;
2099         }
2100     }
2101     return (bf);
2102 }
2103
2104 /*
2105  * Return a Boolean based on setting of a knob.
2106  *
2107  * If the knob is not set, the supplied default is the return value.
2108  * If set, anything that looks or smells like "No", "False", "Off", "0" etc,
2109  * is FALSE, otherwise TRUE.
2110  */
2111 Boolean
2112 getBoolean(const char *name, Boolean bf)
2113 {
2114     char tmp[64];
2115     char *cp;
2116
2117     if (snprintf(tmp, sizeof(tmp), "${%s:U:tl}", name) < (int)(sizeof(tmp))) {
2118         cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
2119
2120         if (cp) {
2121             bf = s2Boolean(cp, bf);
2122             free(cp);
2123         }
2124     }
2125     return (bf);
2126 }