usr.bin/make/main.c

   1 /*      $NetBSD: main.c,v 1.198 2011/09/16 15:38:04 joerg 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 1.198 2011/09/16 15:38:04 joerg 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 1.198 2011/09/16 15:38:04 joerg 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 two optional
 103  *                              arguments for it.
 104  *
 105  *      Fatal                   Print an error message and exit. Also takes
 106  *                              a format string and two arguments.
 107  *
 108  *      Punt                    Aborts all jobs and exits with a message. Also
 109  *                              takes a format string and two arguments.
 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/signal.h>
 121 #include <sys/stat.h>
 122 #ifdef MAKE_NATIVE
 123 #include <sys/utsname.h>
 124 #endif
 125 #include <sys/wait.h>
 126
 127 #include <errno.h>
 128 #include <fcntl.h>
 129 #include <stdarg.h>
 130 #include <stdio.h>
 131 #include <stdlib.h>
 132 #include <time.h>
 133
 134 #include "make.h"
 135 #include "hash.h"
 136 #include "dir.h"
 137 #include "job.h"
 138 #include "pathnames.h"
 139 #include "trace.h"
 140
 141 #ifdef USE_IOVEC
 142 #include <sys/uio.h>
 143 #endif
 144
 145 #ifndef DEFMAXLOCAL
 146 #define DEFMAXLOCAL DEFMAXJOBS
 147 #endif  /* DEFMAXLOCAL */
 148
 149 Lst                     create;         /* Targets to be made */
 150 time_t                  now;            /* Time at start of make */
 151 GNode                   *DEFAULT;       /* .DEFAULT node */
 152 Boolean                 allPrecious;    /* .PRECIOUS given on line by itself */
 153
 154 static Boolean          noBuiltins;     /* -r flag */
 155 static Lst              makefiles;      /* ordered list of makefiles to read */
 156 static Boolean          printVars;      /* print value of one or more vars */
 157 static Lst              variables;      /* list of variables to print */
 158 int                     maxJobs;        /* -j argument */
 159 static int              maxJobTokens;   /* -j argument */
 160 Boolean                 compatMake;     /* -B argument */
 161 int                     debug;          /* -d argument */
 162 Boolean                 noExecute;      /* -n flag */
 163 Boolean                 noRecursiveExecute;     /* -N flag */
 164 Boolean                 keepgoing;      /* -k flag */
 165 Boolean                 queryFlag;      /* -q flag */
 166 Boolean                 touchFlag;      /* -t flag */
 167 Boolean                 ignoreErrors;   /* -i flag */
 168 Boolean                 beSilent;       /* -s flag */
 169 Boolean                 oldVars;        /* variable substitution style */
 170 Boolean                 checkEnvFirst;  /* -e flag */
 171 Boolean                 parseWarnFatal; /* -W flag */
 172 Boolean                 jobServer;      /* -J flag */
 173 static int jp_0 = -1, jp_1 = -1;        /* ends of parent job pipe */
 174 Boolean                 varNoExportEnv; /* -X flag */
 175 Boolean                 doing_depend;   /* Set while reading .depend */
 176 static Boolean          jobsRunning;    /* TRUE if the jobs might be running */
 177 static const char *     tracefile;
 178 static char *           Check_Cwd_av(int, char **, int);
 179 static void             MainParseArgs(int, char **);
 180 static int              ReadMakefile(const void *, const void *);
 181 static void             usage(void) __dead;
 182
 183 static Boolean          ignorePWD;      /* if we use -C, PWD is meaningless */
 184 static char objdir[MAXPATHLEN + 1];     /* where we chdir'ed to */
 185 char curdir[MAXPATHLEN + 1];            /* Startup directory */
 186 char *progname;                         /* the program name */
 187 char *makeDependfile;
 188 pid_t myPid;
 189
 190 Boolean forceJobs = FALSE;
 191
 192 extern Lst parseIncPath;
 193
 194 static void
 195 parse_debug_options(const char *argvalue)
 196 {
 197         const char *modules;
 198         const char *mode;
 199         char *fname;
 200         int len;
 201
 202         for (modules = argvalue; *modules; ++modules) {
 203                 switch (*modules) {
 204                 case 'A':
 205                         debug = ~0;
 206                         break;
 207                 case 'a':
 208                         debug |= DEBUG_ARCH;
 209                         break;
 210                 case 'C':
 211                         debug |= DEBUG_CWD;
 212                         break;
 213                 case 'c':
 214                         debug |= DEBUG_COND;
 215                         break;
 216                 case 'd':
 217                         debug |= DEBUG_DIR;
 218                         break;
 219                 case 'e':
 220                         debug |= DEBUG_ERROR;
 221                         break;
 222                 case 'f':
 223                         debug |= DEBUG_FOR;
 224                         break;
 225                 case 'g':
 226                         if (modules[1] == '1') {
 227                                 debug |= DEBUG_GRAPH1;
 228                                 ++modules;
 229                         }
 230                         else if (modules[1] == '2') {
 231                                 debug |= DEBUG_GRAPH2;
 232                                 ++modules;
 233                         }
 234                         else if (modules[1] == '3') {
 235                                 debug |= DEBUG_GRAPH3;
 236                                 ++modules;
 237                         }
 238                         break;
 239                 case 'j':
 240                         debug |= DEBUG_JOB;
 241                         break;
 242                 case 'l':
 243                         debug |= DEBUG_LOUD;
 244                         break;
 245                 case 'M':
 246                         debug |= DEBUG_META;
 247                         break;
 248                 case 'm':
 249                         debug |= DEBUG_MAKE;
 250                         break;
 251                 case 'n':
 252                         debug |= DEBUG_SCRIPT;
 253                         break;
 254                 case 'p':
 255                         debug |= DEBUG_PARSE;
 256                         break;
 257                 case 's':
 258                         debug |= DEBUG_SUFF;
 259                         break;
 260                 case 't':
 261                         debug |= DEBUG_TARG;
 262                         break;
 263                 case 'v':
 264                         debug |= DEBUG_VAR;
 265                         break;
 266                 case 'x':
 267                         debug |= DEBUG_SHELL;
 268                         break;
 269                 case 'F':
 270                         if (debug_file != stdout && debug_file != stderr)
 271                                 fclose(debug_file);
 272                         if (*++modules == '+')
 273                                 mode = "a";
 274                         else
 275                                 mode = "w";
 276                         if (strcmp(modules, "stdout") == 0) {
 277                                 debug_file = stdout;
 278                                 goto debug_setbuf;
 279                         }
 280                         if (strcmp(modules, "stderr") == 0) {
 281                                 debug_file = stderr;
 282                                 goto debug_setbuf;
 283                         }
 284                         len = strlen(modules);
 285                         fname = malloc(len + 20);
 286                         memcpy(fname, modules, len + 1);
 287                         /* Let the filename be modified by the pid */
 288                         if (strcmp(fname + len - 3, ".%d") == 0)
 289                                 snprintf(fname + len - 2, 20, "%d", getpid());
 290                         debug_file = fopen(fname, mode);
 291                         if (!debug_file) {
 292                                 fprintf(stderr, "Cannot open debug file %s\n",
 293                                     fname);
 294                                 usage();
 295                         }
 296                         free(fname);
 297                         goto debug_setbuf;
 298                 default:
 299                         (void)fprintf(stderr,
 300                             "%s: illegal argument to d option -- %c\n",
 301                             progname, *modules);
 302                         usage();
 303                 }
 304         }
 305 debug_setbuf:
 306         /*
 307          * Make the debug_file unbuffered, and make
 308          * stdout line buffered (unless debugfile == stdout).
 309          */
 310         setvbuf(debug_file, NULL, _IONBF, 0);
 311         if (debug_file != stdout) {
 312                 setvbuf(stdout, NULL, _IOLBF, 0);
 313         }
 314 }
 315
 316 /*-
 317  * MainParseArgs --
 318  *      Parse a given argument vector. Called from main() and from
 319  *      Main_ParseArgLine() when the .MAKEFLAGS target is used.
 320  *
 321  *      XXX: Deal with command line overriding .MAKEFLAGS in makefile
 322  *
 323  * Results:
 324  *      None
 325  *
 326  * Side Effects:
 327  *      Various global and local flags will be set depending on the flags
 328  *      given
 329  */
 330 static void
 331 MainParseArgs(int argc, char **argv)
 332 {
 333         char *p;
 334         int c = '?';
 335         int arginc;
 336         char *argvalue;
 337         const char *getopt_def;
 338         char *optscan;
 339         Boolean inOption, dashDash = FALSE;
 340         char found_path[MAXPATHLEN + 1];        /* for searching for sys.mk */
 341
 342 #define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrst"
 343 /* Can't actually use getopt(3) because rescanning is not portable */
 344
 345         getopt_def = OPTFLAGS;
 346 rearg:
 347         inOption = FALSE;
 348         optscan = NULL;
 349         while(argc > 1) {
 350                 char *getopt_spec;
 351                 if(!inOption)
 352                         optscan = argv[1];
 353                 c = *optscan++;
 354                 arginc = 0;
 355                 if(inOption) {
 356                         if(c == '\0') {
 357                                 ++argv;
 358                                 --argc;
 359                                 inOption = FALSE;
 360                                 continue;
 361                         }
 362                 } else {
 363                         if (c != '-' || dashDash)
 364                                 break;
 365                         inOption = TRUE;
 366                         c = *optscan++;
 367                 }
 368                 /* '-' found at some earlier point */
 369                 getopt_spec = strchr(getopt_def, c);
 370                 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') {
 371                         /* -<something> found, and <something> should have an arg */
 372                         inOption = FALSE;
 373                         arginc = 1;
 374                         argvalue = optscan;
 375                         if(*argvalue == '\0') {
 376                                 if (argc < 3)
 377                                         goto noarg;
 378                                 argvalue = argv[2];
 379                                 arginc = 2;
 380                         }
 381                 } else {
 382                         argvalue = NULL;
 383                 }
 384                 switch(c) {
 385                 case '\0':
 386                         arginc = 1;
 387                         inOption = FALSE;
 388                         break;
 389                 case 'B':
 390                         compatMake = TRUE;
 391                         Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
 392                         Var_Set(MAKE_MODE, "compat", VAR_GLOBAL, 0);
 393                         break;
 394                 case 'C':
 395                         if (chdir(argvalue) == -1) {
 396                                 (void)fprintf(stderr,
 397                                               "%s: chdir %s: %s\n",
 398                                               progname, argvalue,
 399                                               strerror(errno));
 400                                 exit(1);
 401                         }
 402                         if (getcwd(curdir, MAXPATHLEN) == NULL) {
 403                                 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
 404                                 exit(2);
 405                         }
 406                         ignorePWD = TRUE;
 407                         break;
 408                 case 'D':
 409                         if (argvalue == NULL || argvalue[0] == 0) goto noarg;
 410                         Var_Set(argvalue, "1", VAR_GLOBAL, 0);
 411                         Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
 412                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 413                         break;
 414                 case 'I':
 415                         if (argvalue == NULL) goto noarg;
 416                         Parse_AddIncludeDir(argvalue);
 417                         Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
 418                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 419                         break;
 420                 case 'J':
 421                         if (argvalue == NULL) goto noarg;
 422                         if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) {
 423                             (void)fprintf(stderr,
 424                                 "%s: internal error -- J option malformed (%s)\n",
 425                                 progname, argvalue);
 426                                 usage();
 427                         }
 428                         if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
 429                             (fcntl(jp_1, F_GETFD, 0) < 0)) {
 430 #if 0
 431                             (void)fprintf(stderr,
 432                                 "%s: ###### warning -- J descriptors were closed!\n",
 433                                 progname);
 434                             exit(2);
 435 #endif
 436                             jp_0 = -1;
 437                             jp_1 = -1;
 438                             compatMake = TRUE;
 439                         } else {
 440                             Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
 441                             Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 442                             jobServer = TRUE;
 443                         }
 444                         break;
 445                 case 'N':
 446                         noExecute = TRUE;
 447                         noRecursiveExecute = TRUE;
 448                         Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL);
 449                         break;
 450                 case 'S':
 451                         keepgoing = FALSE;
 452                         Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
 453                         break;
 454                 case 'T':
 455                         if (argvalue == NULL) goto noarg;
 456                         tracefile = bmake_strdup(argvalue);
 457                         Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL);
 458                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 459                         break;
 460                 case 'V':
 461                         if (argvalue == NULL) goto noarg;
 462                         printVars = TRUE;
 463                         (void)Lst_AtEnd(variables, argvalue);
 464                         Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
 465                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 466                         break;
 467                 case 'W':
 468                         parseWarnFatal = TRUE;
 469                         break;
 470                 case 'X':
 471                         varNoExportEnv = TRUE;
 472                         Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL);
 473                         break;
 474                 case 'd':
 475                         if (argvalue == NULL) goto noarg;
 476                         /* If '-d-opts' don't pass to children */
 477                         if (argvalue[0] == '-')
 478                             argvalue++;
 479                         else {
 480                             Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
 481                             Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 482                         }
 483                         parse_debug_options(argvalue);
 484                         break;
 485                 case 'e':
 486                         checkEnvFirst = TRUE;
 487                         Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
 488                         break;
 489                 case 'f':
 490                         if (argvalue == NULL) goto noarg;
 491                         (void)Lst_AtEnd(makefiles, argvalue);
 492                         break;
 493                 case 'i':
 494                         ignoreErrors = TRUE;
 495                         Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
 496                         break;
 497                 case 'j':
 498                         if (argvalue == NULL) goto noarg;
 499                         forceJobs = TRUE;
 500                         maxJobs = strtol(argvalue, &p, 0);
 501                         if (*p != '\0' || maxJobs < 1) {
 502                                 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n",
 503                                     progname);
 504                                 exit(1);
 505                         }
 506                         Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
 507                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 508                         Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL, 0);
 509                         maxJobTokens = maxJobs;
 510                         break;
 511                 case 'k':
 512                         keepgoing = TRUE;
 513                         Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
 514                         break;
 515                 case 'm':
 516                         if (argvalue == NULL) goto noarg;
 517                         /* look for magic parent directory search string */
 518                         if (strncmp(".../", argvalue, 4) == 0) {
 519                                 if (!Dir_FindHereOrAbove(curdir, argvalue+4,
 520                                     found_path, sizeof(found_path)))
 521                                         break;          /* nothing doing */
 522                                 (void)Dir_AddDir(sysIncPath, found_path);
 523                         } else {
 524                                 (void)Dir_AddDir(sysIncPath, argvalue);
 525                         }
 526                         Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
 527                         Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
 528                         break;
 529                 case 'n':
 530                         noExecute = TRUE;
 531                         Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
 532                         break;
 533                 case 'q':
 534                         queryFlag = TRUE;
 535                         /* Kind of nonsensical, wot? */
 536                         Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
 537                         break;
 538                 case 'r':
 539                         noBuiltins = TRUE;
 540                         Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
 541                         break;
 542                 case 's':
 543                         beSilent = TRUE;
 544                         Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
 545                         break;
 546                 case 't':
 547                         touchFlag = TRUE;
 548                         Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
 549                         break;
 550                 case '-':
 551                         dashDash = TRUE;
 552                         break;
 553                 default:
 554                 case '?':
 555                         usage();
 556                 }
 557                 argv += arginc;
 558                 argc -= arginc;
 559         }
 560
 561         oldVars = TRUE;
 562
 563         /*
 564          * See if the rest of the arguments are variable assignments and
 565          * perform them if so. Else take them to be targets and stuff them
 566          * on the end of the "create" list.
 567          */
 568         for (; argc > 1; ++argv, --argc)
 569                 if (Parse_IsVar(argv[1])) {
 570                         Parse_DoVar(argv[1], VAR_CMD);
 571                 } else {
 572                         if (!*argv[1])
 573                                 Punt("illegal (null) argument.");
 574                         if (*argv[1] == '-' && !dashDash)
 575                                 goto rearg;
 576                         (void)Lst_AtEnd(create, bmake_strdup(argv[1]));
 577                 }
 578
 579         return;
 580 noarg:
 581         (void)fprintf(stderr, "%s: option requires an argument -- %c\n",
 582             progname, c);
 583         usage();
 584 }
 585
 586 /*-
 587  * Main_ParseArgLine --
 588  *      Used by the parse module when a .MFLAGS or .MAKEFLAGS target
 589  *      is encountered and by main() when reading the .MAKEFLAGS envariable.
 590  *      Takes a line of arguments and breaks it into its
 591  *      component words and passes those words and the number of them to the
 592  *      MainParseArgs function.
 593  *      The line should have all its leading whitespace removed.
 594  *
 595  * Input:
 596  *      line            Line to fracture
 597  *
 598  * Results:
 599  *      None
 600  *
 601  * Side Effects:
 602  *      Only those that come from the various arguments.
 603  */
 604 void
 605 Main_ParseArgLine(const char *line)
 606 {
 607         char **argv;                    /* Manufactured argument vector */
 608         int argc;                       /* Number of arguments in argv */
 609         char *args;                     /* Space used by the args */
 610         char *buf, *p1;
 611         char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1);
 612         size_t len;
 613
 614         if (line == NULL)
 615                 return;
 616         for (; *line == ' '; ++line)
 617                 continue;
 618         if (!*line)
 619                 return;
 620
 621         buf = bmake_malloc(len = strlen(line) + strlen(argv0) + 2);
 622         (void)snprintf(buf, len, "%s %s", argv0, line);
 623         if (p1)
 624                 free(p1);
 625
 626         argv = brk_string(buf, &argc, TRUE, &args);
 627         if (argv == NULL) {
 628                 Error("Unterminated quoted string [%s]", buf);
 629                 free(buf);
 630                 return;
 631         }
 632         free(buf);
 633         MainParseArgs(argc, argv);
 634
 635         free(args);
 636         free(argv);
 637 }
 638
 639 Boolean
 640 Main_SetObjdir(const char *path)
 641 {
 642         struct stat sb;
 643         char *p = NULL;
 644         char buf[MAXPATHLEN + 1];
 645         Boolean rc = FALSE;
 646
 647         /* expand variable substitutions */
 648         if (strchr(path, '$') != 0) {
 649                 snprintf(buf, MAXPATHLEN, "%s", path);
 650                 path = p = Var_Subst(NULL, buf, VAR_GLOBAL, 0);
 651         }
 652
 653         if (path[0] != '/') {
 654                 snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path);
 655                 path = buf;
 656         }
 657
 658         /* look for the directory and try to chdir there */
 659         if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
 660                 if (chdir(path)) {
 661                         (void)fprintf(stderr, "make warning: %s: %s.\n",
 662                                       path, strerror(errno));
 663                 } else {
 664                         strncpy(objdir, path, MAXPATHLEN);
 665                         Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0);
 666                         setenv("PWD", objdir, 1);
 667                         Dir_InitDot();
 668                         rc = TRUE;
 669                 }
 670         }
 671
 672         if (p)
 673                 free(p);
 674         return rc;
 675 }
 676
 677 /*-
 678  * ReadAllMakefiles --
 679  *      wrapper around ReadMakefile() to read all.
 680  *
 681  * Results:
 682  *      TRUE if ok, FALSE on error
 683  */
 684 static int
 685 ReadAllMakefiles(const void *p, const void *q)
 686 {
 687         return (ReadMakefile(p, q) == 0);
 688 }
 689
 690 int
 691 str2Lst_Append(Lst lp, char *str, const char *sep)
 692 {
 693     char *cp;
 694     int n;
 695
 696     if (!sep)
 697         sep = " \t";
 698
 699     for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) {
 700         (void)Lst_AtEnd(lp, cp);
 701         n++;
 702     }
 703     return (n);
 704 }
 705
 706 #ifdef SIGINFO
 707 /*ARGSUSED*/
 708 static void
 709 siginfo(int signo __unused)
 710 {
 711         char dir[MAXPATHLEN];
 712         char str[2 * MAXPATHLEN];
 713         int len;
 714         if (getcwd(dir, sizeof(dir)) == NULL)
 715                 return;
 716         len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir);
 717         if (len > 0)
 718                 (void)write(STDERR_FILENO, str, (size_t)len);
 719 }
 720 #endif
 721
 722 /*
 723  * Allow makefiles some control over the mode we run in.
 724  */
 725 void
 726 MakeMode(const char *mode)
 727 {
 728     char *mp = NULL;
 729
 730     if (!mode)
 731         mode = mp = Var_Subst(NULL, "${" MAKE_MODE ":tl}", VAR_GLOBAL, 0);
 732
 733     if (mode && *mode) {
 734         if (strstr(mode, "compat")) {
 735             compatMake = TRUE;
 736             forceJobs = FALSE;
 737         }
 738 #if USE_META
 739         if (strstr(mode, "meta"))
 740             meta_init(mode);
 741 #endif
 742     }
 743     if (mp)
 744         free(mp);
 745 }
 746
 747 /*-
 748  * main --
 749  *      The main function, for obvious reasons. Initializes variables
 750  *      and a few modules, then parses the arguments give it in the
 751  *      environment and on the command line. Reads the system makefile
 752  *      followed by either Makefile, makefile or the file given by the
 753  *      -f argument. Sets the .MAKEFLAGS PMake variable based on all the
 754  *      flags it has received by then uses either the Make or the Compat
 755  *      module to create the initial list of targets.
 756  *
 757  * Results:
 758  *      If -q was given, exits -1 if anything was out-of-date. Else it exits
 759  *      0.
 760  *
 761  * Side Effects:
 762  *      The program exits when done. Targets are created. etc. etc. etc.
 763  */
 764 int
 765 main(int argc, char **argv)
 766 {
 767         Lst targs;      /* target nodes to create -- passed to Make_Init */
 768         Boolean outOfDate = FALSE;      /* FALSE if all targets up to date */
 769         struct stat sb, sa;
 770         char *p1, *path, *pwd;
 771         char mdpath[MAXPATHLEN];
 772         const char *machine = getenv("MACHINE");
 773         const char *machine_arch = getenv("MACHINE_ARCH");
 774         char *syspath = getenv("MAKESYSPATH");
 775         Lst sysMkPath;                  /* Path of sys.mk */
 776         char *cp = NULL, *start;
 777                                         /* avoid faults on read-only strings */
 778         static char defsyspath[] = _PATH_DEFSYSPATH;
 779         char found_path[MAXPATHLEN + 1];        /* for searching for sys.mk */
 780         struct timeval rightnow;                /* to initialize random seed */
 781 #ifdef MAKE_NATIVE
 782         struct utsname utsname;
 783 #endif
 784
 785         /* default to writing debug to stderr */
 786         debug_file = stderr;
 787
 788 #ifdef SIGINFO
 789         (void)bmake_signal(SIGINFO, siginfo);
 790 #endif
 791         /*
 792          * Set the seed to produce a different random sequence
 793          * on each program execution.
 794          */
 795         gettimeofday(&rightnow, NULL);
 796         srandom(rightnow.tv_sec + rightnow.tv_usec);
 797
 798         if ((progname = strrchr(argv[0], '/')) != NULL)
 799                 progname++;
 800         else
 801                 progname = argv[0];
 802 #if defined(RLIMIT_NOFILE) && !defined(__minix)
 803         /*
 804          * get rid of resource limit on file descriptors
 805          */
 806         {
 807                 struct rlimit rl;
 808                 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
 809                     rl.rlim_cur != rl.rlim_max) {
 810                         rl.rlim_cur = rl.rlim_max;
 811                         (void)setrlimit(RLIMIT_NOFILE, &rl);
 812                 }
 813         }
 814 #endif
 815
 816         /*
 817          * Get the name of this type of MACHINE from utsname
 818          * so we can share an executable for similar machines.
 819          * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
 820          *
 821          * Note that both MACHINE and MACHINE_ARCH are decided at
 822          * run-time.
 823          */
 824         if (!machine) {
 825 #ifdef MAKE_NATIVE
 826             if (uname(&utsname) == -1) {
 827                 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
 828                     strerror(errno));
 829                 exit(2);
 830             }
 831             machine = utsname.machine;
 832 #else
 833 #ifdef MAKE_MACHINE
 834             machine = MAKE_MACHINE;
 835 #else
 836             machine = "unknown";
 837 #endif
 838 #endif
 839         }
 840
 841         if (!machine_arch) {
 842 #ifndef MACHINE_ARCH
 843 #ifdef MAKE_MACHINE_ARCH
 844             machine_arch = MAKE_MACHINE_ARCH;
 845 #else
 846             machine_arch = "unknown";
 847 #endif
 848 #else
 849             machine_arch = MACHINE_ARCH;
 850 #endif
 851         }
 852
 853         myPid = getpid();               /* remember this for vFork() */
 854
 855         /*
 856          * Just in case MAKEOBJDIR wants us to do something tricky.
 857          */
 858         Var_Init();             /* Initialize the lists of variables for
 859                                  * parsing arguments */
 860         Var_Set("MACHINE", machine, VAR_GLOBAL, 0);
 861         Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0);
 862 #ifdef MAKE_VERSION
 863         Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0);
 864 #endif
 865         Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */
 866         /*
 867          * This is the traditional preference for makefiles.
 868          */
 869 #ifndef MAKEFILE_PREFERENCE_LIST
 870 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
 871 #endif
 872         Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST,
 873                 VAR_GLOBAL, 0);
 874         Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL, 0);
 875
 876         create = Lst_Init(FALSE);
 877         makefiles = Lst_Init(FALSE);
 878         printVars = FALSE;
 879         variables = Lst_Init(FALSE);
 880         beSilent = FALSE;               /* Print commands as executed */
 881         ignoreErrors = FALSE;           /* Pay attention to non-zero returns */
 882         noExecute = FALSE;              /* Execute all commands */
 883         noRecursiveExecute = FALSE;     /* Execute all .MAKE targets */
 884         keepgoing = FALSE;              /* Stop on error */
 885         allPrecious = FALSE;            /* Remove targets when interrupted */
 886         queryFlag = FALSE;              /* This is not just a check-run */
 887         noBuiltins = FALSE;             /* Read the built-in rules */
 888         touchFlag = FALSE;              /* Actually update targets */
 889         debug = 0;                      /* No debug verbosity, please. */
 890         jobsRunning = FALSE;
 891
 892         maxJobs = DEFMAXLOCAL;          /* Set default local max concurrency */
 893         maxJobTokens = maxJobs;
 894         compatMake = FALSE;             /* No compat mode */
 895         ignorePWD = FALSE;
 896
 897         /*
 898          * Initialize the parsing, directory and variable modules to prepare
 899          * for the reading of inclusion paths and variable settings on the
 900          * command line
 901          */
 902
 903         /*
 904          * Initialize various variables.
 905          *      MAKE also gets this name, for compatibility
 906          *      .MAKEFLAGS gets set to the empty string just in case.
 907          *      MFLAGS also gets initialized empty, for compatibility.
 908          */
 909         Parse_Init();
 910         if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) {
 911             /*
 912              * Leave alone if it is an absolute path, or if it does
 913              * not contain a '/' in which case we need to find it in
 914              * the path, like execvp(3) and the shells do.
 915              */
 916             p1 = argv[0];
 917         } else {
 918             /*
 919              * A relative path, canonicalize it.
 920              */
 921             p1 = realpath(argv[0], mdpath);
 922             if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) {
 923                 p1 = argv[0];           /* realpath failed */
 924             }
 925         }
 926         Var_Set("MAKE", p1, VAR_GLOBAL, 0);
 927         Var_Set(".MAKE", p1, VAR_GLOBAL, 0);
 928         Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0);
 929         Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0);
 930         Var_Set("MFLAGS", "", VAR_GLOBAL, 0);
 931         Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0);
 932
 933         /*
 934          * Set some other useful macros
 935          */
 936         {
 937             char tmp[64];
 938             const char *ep;
 939
 940             if (!(ep = getenv(MAKE_LEVEL))) {
 941                 ep = "0";
 942             }
 943             Var_Set(MAKE_LEVEL, ep, VAR_GLOBAL, 0);
 944             snprintf(tmp, sizeof(tmp), "%u", myPid);
 945             Var_Set(".MAKE.PID", tmp, VAR_GLOBAL, 0);
 946             snprintf(tmp, sizeof(tmp), "%u", getppid());
 947             Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL, 0);
 948         }
 949         Job_SetPrefix();
 950
 951         /*
 952          * First snag any flags out of the MAKE environment variable.
 953          * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
 954          * in a different format).
 955          */
 956 #ifdef POSIX
 957         Main_ParseArgLine(getenv("MAKEFLAGS"));
 958 #else
 959         Main_ParseArgLine(getenv("MAKE"));
 960 #endif
 961
 962         /*
 963          * Find where we are (now).
 964          * We take care of PWD for the automounter below...
 965          */
 966         if (getcwd(curdir, MAXPATHLEN) == NULL) {
 967                 (void)fprintf(stderr, "%s: getcwd: %s.\n",
 968                     progname, strerror(errno));
 969                 exit(2);
 970         }
 971
 972         MainParseArgs(argc, argv);
 973
 974         /*
 975          * Verify that cwd is sane.
 976          */
 977         if (stat(curdir, &sa) == -1) {
 978             (void)fprintf(stderr, "%s: %s: %s.\n",
 979                  progname, curdir, strerror(errno));
 980             exit(2);
 981         }
 982
 983         /*
 984          * All this code is so that we know where we are when we start up
 985          * on a different machine with pmake.
 986          * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
 987          * since the value of curdir can vary depending on how we got
 988          * here.  Ie sitting at a shell prompt (shell that provides $PWD)
 989          * or via subdir.mk in which case its likely a shell which does
 990          * not provide it.
 991          * So, to stop it breaking this case only, we ignore PWD if
 992          * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform.
 993          */
 994         if (!ignorePWD &&
 995             (pwd = getenv("PWD")) != NULL &&
 996             getenv("MAKEOBJDIRPREFIX") == NULL) {
 997                 const char *makeobjdir = getenv("MAKEOBJDIR");
 998
 999                 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) {
1000                         if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino &&
1001                             sa.st_dev == sb.st_dev)
1002                                 (void)strncpy(curdir, pwd, MAXPATHLEN);
1003                 }
1004         }
1005         Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0);
1006
1007         /*
1008          * Find the .OBJDIR.  If MAKEOBJDIRPREFIX, or failing that,
1009          * MAKEOBJDIR is set in the environment, try only that value
1010          * and fall back to .CURDIR if it does not exist.
1011          *
1012          * Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and
1013          * finally _PATH_OBJDIRPREFIX`pwd`, in that order.  If none
1014          * of these paths exist, just use .CURDIR.
1015          */
1016         Dir_Init(curdir);
1017         (void)Main_SetObjdir(curdir);
1018
1019         if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) {
1020                 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir);
1021                 (void)Main_SetObjdir(mdpath);
1022         } else if ((path = getenv("MAKEOBJDIR")) != NULL) {
1023                 (void)Main_SetObjdir(path);
1024         } else {
1025                 (void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine);
1026                 if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) {
1027                         (void)snprintf(mdpath, MAXPATHLEN, "%s%s",
1028                                         _PATH_OBJDIRPREFIX, curdir);
1029                         (void)Main_SetObjdir(mdpath);
1030                 }
1031         }
1032
1033         /*
1034          * Be compatible if user did not specify -j and did not explicitly
1035          * turned compatibility on
1036          */
1037         if (!compatMake && !forceJobs) {
1038                 compatMake = TRUE;
1039         }
1040
1041         /*
1042          * Initialize archive, target and suffix modules in preparation for
1043          * parsing the makefile(s)
1044          */
1045         Arch_Init();
1046         Targ_Init();
1047         Suff_Init();
1048         Trace_Init(tracefile);
1049
1050         DEFAULT = NULL;
1051         (void)time(&now);
1052
1053         Trace_Log(MAKESTART, NULL);
1054
1055         /*
1056          * Set up the .TARGETS variable to contain the list of targets to be
1057          * created. If none specified, make the variable empty -- the parser
1058          * will fill the thing in with the default or .MAIN target.
1059          */
1060         if (!Lst_IsEmpty(create)) {
1061                 LstNode ln;
1062
1063                 for (ln = Lst_First(create); ln != NULL;
1064                     ln = Lst_Succ(ln)) {
1065                         char *name = (char *)Lst_Datum(ln);
1066
1067                         Var_Append(".TARGETS", name, VAR_GLOBAL);
1068                 }
1069         } else
1070                 Var_Set(".TARGETS", "", VAR_GLOBAL, 0);
1071
1072
1073         /*
1074          * If no user-supplied system path was given (through the -m option)
1075          * add the directories from the DEFSYSPATH (more than one may be given
1076          * as dir1:...:dirn) to the system include path.
1077          */
1078         if (syspath == NULL || *syspath == '\0')
1079                 syspath = defsyspath;
1080         else
1081                 syspath = bmake_strdup(syspath);
1082
1083         for (start = syspath; *start != '\0'; start = cp) {
1084                 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1085                         continue;
1086                 if (*cp == ':') {
1087                         *cp++ = '\0';
1088                 }
1089                 /* look for magic parent directory search string */
1090                 if (strncmp(".../", start, 4) != 0) {
1091                         (void)Dir_AddDir(defIncPath, start);
1092                 } else {
1093                         if (Dir_FindHereOrAbove(curdir, start+4,
1094                             found_path, sizeof(found_path))) {
1095                                 (void)Dir_AddDir(defIncPath, found_path);
1096                         }
1097                 }
1098         }
1099         if (syspath != defsyspath)
1100                 free(syspath);
1101
1102         /*
1103          * Read in the built-in rules first, followed by the specified
1104          * makefile, if it was (makefile != NULL), or the default
1105          * makefile and Makefile, in that order, if it wasn't.
1106          */
1107         if (!noBuiltins) {
1108                 LstNode ln;
1109
1110                 sysMkPath = Lst_Init(FALSE);
1111                 Dir_Expand(_PATH_DEFSYSMK,
1112                            Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath,
1113                            sysMkPath);
1114                 if (Lst_IsEmpty(sysMkPath))
1115                         Fatal("%s: no system rules (%s).", progname,
1116                             _PATH_DEFSYSMK);
1117                 ln = Lst_Find(sysMkPath, NULL, ReadMakefile);
1118                 if (ln == NULL)
1119                         Fatal("%s: cannot open %s.", progname,
1120                             (char *)Lst_Datum(ln));
1121         }
1122
1123         if (!Lst_IsEmpty(makefiles)) {
1124                 LstNode ln;
1125
1126                 ln = Lst_Find(makefiles, NULL, ReadAllMakefiles);
1127                 if (ln != NULL)
1128                         Fatal("%s: cannot open %s.", progname,
1129                             (char *)Lst_Datum(ln));
1130         } else {
1131             p1 = Var_Subst(NULL, "${" MAKEFILE_PREFERENCE "}",
1132                 VAR_CMD, 0);
1133             if (p1) {
1134                 (void)str2Lst_Append(makefiles, p1, NULL);
1135                 (void)Lst_Find(makefiles, NULL, ReadMakefile);
1136                 free(p1);
1137             }
1138         }
1139
1140         /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1141         if (!noBuiltins || !printVars) {
1142             makeDependfile = Var_Subst(NULL, "${.MAKE.DEPENDFILE:T}",
1143                 VAR_CMD, 0);
1144             doing_depend = TRUE;
1145             (void)ReadMakefile(makeDependfile, NULL);
1146             doing_depend = FALSE;
1147         }
1148
1149         MakeMode(NULL);
1150
1151         Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
1152         if (p1)
1153             free(p1);
1154
1155         if (!compatMake)
1156             Job_ServerStart(maxJobTokens, jp_0, jp_1);
1157         if (DEBUG(JOB))
1158             fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1159                 jp_0, jp_1, maxJobs, maxJobTokens, compatMake);
1160
1161         Main_ExportMAKEFLAGS(TRUE);     /* initial export */
1162
1163         Check_Cwd_av(0, NULL, 0);       /* initialize it */
1164
1165
1166         /*
1167          * For compatibility, look at the directories in the VPATH variable
1168          * and add them to the search path, if the variable is defined. The
1169          * variable's value is in the same format as the PATH envariable, i.e.
1170          * <directory>:<directory>:<directory>...
1171          */
1172         if (Var_Exists("VPATH", VAR_CMD)) {
1173                 char *vpath, savec;
1174                 /*
1175                  * GCC stores string constants in read-only memory, but
1176                  * Var_Subst will want to write this thing, so store it
1177                  * in an array
1178                  */
1179                 static char VPATH[] = "${VPATH}";
1180
1181                 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE);
1182                 path = vpath;
1183                 do {
1184                         /* skip to end of directory */
1185                         for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1186                                 continue;
1187                         /* Save terminator character so know when to stop */
1188                         savec = *cp;
1189                         *cp = '\0';
1190                         /* Add directory to search path */
1191                         (void)Dir_AddDir(dirSearchPath, path);
1192                         *cp = savec;
1193                         path = cp + 1;
1194                 } while (savec == ':');
1195                 free(vpath);
1196         }
1197
1198         /*
1199          * Now that all search paths have been read for suffixes et al, it's
1200          * time to add the default search path to their lists...
1201          */
1202         Suff_DoPaths();
1203
1204         /*
1205          * Propagate attributes through :: dependency lists.
1206          */
1207         Targ_Propagate();
1208
1209         /* print the initial graph, if the user requested it */
1210         if (DEBUG(GRAPH1))
1211                 Targ_PrintGraph(1);
1212
1213         /* print the values of any variables requested by the user */
1214         if (printVars) {
1215                 LstNode ln;
1216
1217                 for (ln = Lst_First(variables); ln != NULL;
1218                     ln = Lst_Succ(ln)) {
1219                         char *var = (char *)Lst_Datum(ln);
1220                         char *value;
1221
1222                         if (strchr(var, '$')) {
1223                                 value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 0);
1224                         } else {
1225                                 value = Var_Value(var, VAR_GLOBAL, &p1);
1226                         }
1227                         printf("%s\n", value ? value : "");
1228                         if (p1)
1229                                 free(p1);
1230                 }
1231         } else {
1232                 /*
1233                  * Have now read the entire graph and need to make a list of
1234                  * targets to create. If none was given on the command line,
1235                  * we consult the parsing module to find the main target(s)
1236                  * to create.
1237                  */
1238                 if (Lst_IsEmpty(create))
1239                         targs = Parse_MainName();
1240                 else
1241                         targs = Targ_FindList(create, TARG_CREATE);
1242
1243                 if (!compatMake) {
1244                         /*
1245                          * Initialize job module before traversing the graph
1246                          * now that any .BEGIN and .END targets have been read.
1247                          * This is done only if the -q flag wasn't given
1248                          * (to prevent the .BEGIN from being executed should
1249                          * it exist).
1250                          */
1251                         if (!queryFlag) {
1252                                 Job_Init();
1253                                 jobsRunning = TRUE;
1254                         }
1255
1256                         /* Traverse the graph, checking on all the targets */
1257                         outOfDate = Make_Run(targs);
1258                 } else {
1259                         /*
1260                          * Compat_Init will take care of creating all the
1261                          * targets as well as initializing the module.
1262                          */
1263                         Compat_Run(targs);
1264                 }
1265         }
1266
1267 #ifdef CLEANUP
1268         Lst_Destroy(targs, NULL);
1269         Lst_Destroy(variables, NULL);
1270         Lst_Destroy(makefiles, NULL);
1271         Lst_Destroy(create, (FreeProc *)free);
1272 #endif
1273
1274         /* print the graph now it's been processed if the user requested it */
1275         if (DEBUG(GRAPH2))
1276                 Targ_PrintGraph(2);
1277
1278         Trace_Log(MAKEEND, 0);
1279
1280         Suff_End();
1281         Targ_End();
1282         Arch_End();
1283         Var_End();
1284         Parse_End();
1285         Dir_End();
1286         Job_End();
1287         Trace_End();
1288
1289         return outOfDate ? 1 : 0;
1290 }
1291
1292 /*-
1293  * ReadMakefile  --
1294  *      Open and parse the given makefile.
1295  *
1296  * Results:
1297  *      0 if ok. -1 if couldn't open file.
1298  *
1299  * Side Effects:
1300  *      lots
1301  */
1302 static int
1303 ReadMakefile(const void *p, const void *q __unused)
1304 {
1305         const char *fname = p;          /* makefile to read */
1306         int fd;
1307         size_t len = MAXPATHLEN;
1308         char *name, *path = bmake_malloc(len);
1309
1310         if (!strcmp(fname, "-")) {
1311                 Parse_File(NULL /*stdin*/, -1);
1312                 Var_Set("MAKEFILE", "", VAR_GLOBAL, 0);
1313         } else {
1314                 /* if we've chdir'd, rebuild the path name */
1315                 if (strcmp(curdir, objdir) && *fname != '/') {
1316                         size_t plen = strlen(curdir) + strlen(fname) + 2;
1317                         if (len < plen)
1318                                 path = bmake_realloc(path, len = 2 * plen);
1319
1320                         (void)snprintf(path, len, "%s/%s", curdir, fname);
1321                         fd = open(path, O_RDONLY);
1322                         if (fd != -1) {
1323                                 fname = path;
1324                                 goto found;
1325                         }
1326
1327                         /* If curdir failed, try objdir (ala .depend) */
1328                         plen = strlen(objdir) + strlen(fname) + 2;
1329                         if (len < plen)
1330                                 path = bmake_realloc(path, len = 2 * plen);
1331                         (void)snprintf(path, len, "%s/%s", objdir, fname);
1332                         fd = open(path, O_RDONLY);
1333                         if (fd != -1) {
1334                                 fname = path;
1335                                 goto found;
1336                         }
1337                 } else {
1338                         fd = open(fname, O_RDONLY);
1339                         if (fd != -1)
1340                                 goto found;
1341                 }
1342                 /* look in -I and system include directories. */
1343                 name = Dir_FindFile(fname, parseIncPath);
1344                 if (!name)
1345                         name = Dir_FindFile(fname,
1346                                 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
1347                 if (!name || (fd = open(name, O_RDONLY)) == -1) {
1348                         if (name)
1349                                 free(name);
1350                         free(path);
1351                         return(-1);
1352                 }
1353                 fname = name;
1354                 /*
1355                  * set the MAKEFILE variable desired by System V fans -- the
1356                  * placement of the setting here means it gets set to the last
1357                  * makefile specified, as it is set by SysV make.
1358                  */
1359 found:
1360                 if (!doing_depend)
1361                         Var_Set("MAKEFILE", fname, VAR_GLOBAL, 0);
1362                 Parse_File(fname, fd);
1363         }
1364         free(path);
1365         return(0);
1366 }
1367
1368
1369 /*
1370  * If MAKEOBJDIRPREFIX is in use, make ends up not in .CURDIR
1371  * in situations that would not arrise with ./obj (links or not).
1372  * This tends to break things like:
1373  *
1374  * build:
1375  *      ${MAKE} includes
1376  *
1377  * This function spots when ${.MAKE:T} or ${.MAKE} is a command (as
1378  * opposed to an argument) in a command line and if so returns
1379  * ${.CURDIR} so caller can chdir() so that the assumptions made by
1380  * the Makefile hold true.
1381  *
1382  * If ${.MAKE} does not contain any '/', then ${.MAKE:T} is skipped.
1383  *
1384  * The chdir() only happens in the child process, and does nothing if
1385  * MAKEOBJDIRPREFIX and MAKEOBJDIR are not in the environment so it
1386  * should not break anything.  Also if NOCHECKMAKECHDIR is set we
1387  * do nothing - to ensure historic semantics can be retained.
1388  */
1389 static int  Check_Cwd_Off = 0;
1390
1391 static char *
1392 Check_Cwd_av(int ac, char **av, int copy)
1393 {
1394     static char *make[4];
1395     static char *cur_dir = NULL;
1396     char **mp;
1397     char *cp;
1398     int is_cmd, next_cmd;
1399     int i;
1400     int n;
1401
1402     if (Check_Cwd_Off) {
1403         if (DEBUG(CWD))
1404             fprintf(debug_file, "check_cwd: check is off.\n");
1405         return NULL;
1406     }
1407
1408     if (make[0] == NULL) {
1409         if (Var_Exists("NOCHECKMAKECHDIR", VAR_GLOBAL)) {
1410             Check_Cwd_Off = 1;
1411             if (DEBUG(CWD))
1412                 fprintf(debug_file, "check_cwd: turning check off.\n");
1413             return NULL;
1414         }
1415
1416         make[1] = Var_Value(".MAKE", VAR_GLOBAL, &cp);
1417         if ((make[0] = strrchr(make[1], '/')) == NULL) {
1418             make[0] = make[1];
1419             make[1] = NULL;
1420         } else
1421             ++make[0];
1422         make[2] = NULL;
1423         cur_dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp);
1424     }
1425     if (ac == 0 || av == NULL) {
1426         if (DEBUG(CWD))
1427             fprintf(debug_file, "check_cwd: empty command.\n");
1428         return NULL;                    /* initialization only */
1429     }
1430
1431     if (getenv("MAKEOBJDIR") == NULL &&
1432         getenv("MAKEOBJDIRPREFIX") == NULL) {
1433         if (DEBUG(CWD))
1434             fprintf(debug_file, "check_cwd: no obj dirs.\n");
1435         return NULL;
1436     }
1437
1438
1439     next_cmd = 1;
1440     for (i = 0; i < ac; ++i) {
1441         is_cmd = next_cmd;
1442
1443         n = strlen(av[i]);
1444         cp = &(av[i])[n - 1];
1445         if (strspn(av[i], "|&;") == (size_t)n) {
1446             next_cmd = 1;
1447             continue;
1448         } else if (*cp == ';' || *cp == '&' || *cp == '|' || *cp == ')') {
1449             next_cmd = 1;
1450             if (copy) {
1451                 do {
1452                     *cp-- = '\0';
1453                 } while (*cp == ';' || *cp == '&' || *cp == '|' ||
1454                          *cp == ')' || *cp == '}') ;
1455             } else {
1456                 /*
1457                  * XXX this should not happen.
1458                  */
1459                 fprintf(stderr, "%s: WARNING: raw arg ends in shell meta '%s'\n",
1460                     progname, av[i]);
1461             }
1462         } else
1463             next_cmd = 0;
1464
1465         cp = av[i];
1466         if (*cp == ';' || *cp == '&' || *cp == '|')
1467             is_cmd = 1;
1468
1469         if (DEBUG(CWD))
1470             fprintf(debug_file, "av[%d] == %s '%s'",
1471                 i, (is_cmd) ? "cmd" : "arg", av[i]);
1472         if (is_cmd != 0) {
1473             if (*cp == '(' || *cp == '{' ||
1474                 *cp == ';' || *cp == '&' || *cp == '|') {
1475                 do {
1476                     ++cp;
1477                 } while (*cp == '(' || *cp == '{' ||
1478                          *cp == ';' || *cp == '&' || *cp == '|');
1479                 if (*cp == '\0') {
1480                     next_cmd = 1;
1481                     continue;
1482                 }
1483             }
1484             if (strcmp(cp, "cd") == 0 || strcmp(cp, "chdir") == 0) {
1485                 if (DEBUG(CWD))
1486                     fprintf(debug_file, " == cd, done.\n");
1487                 return NULL;
1488             }
1489             for (mp = make; *mp != NULL; ++mp) {
1490                 n = strlen(*mp);
1491                 if (strcmp(cp, *mp) == 0) {
1492                     if (DEBUG(CWD))
1493                         fprintf(debug_file, " %s == '%s', chdir(%s)\n",
1494                             cp, *mp, cur_dir);
1495                     return cur_dir;
1496                 }
1497             }
1498         }
1499         if (DEBUG(CWD))
1500             fprintf(debug_file, "\n");
1501     }
1502     return NULL;
1503 }
1504
1505 char *
1506 Check_Cwd_Cmd(const char *cmd)
1507 {
1508     char *cp, *bp;
1509     char **av;
1510     int ac;
1511
1512     if (Check_Cwd_Off)
1513         return NULL;
1514
1515     if (cmd) {
1516         av = brk_string(cmd, &ac, TRUE, &bp);
1517         if (DEBUG(CWD))
1518             fprintf(debug_file, "splitting: '%s' -> %d words\n",
1519                 cmd, ac);
1520     } else {
1521         ac = 0;
1522         av = NULL;
1523         bp = NULL;
1524     }
1525     cp = Check_Cwd_av(ac, av, 1);
1526     if (bp)
1527         free(bp);
1528     if (av)
1529         free(av);
1530     return cp;
1531 }
1532
1533 void
1534 Check_Cwd(const char **argv)
1535 {
1536     char *cp;
1537     int ac;
1538
1539     if (Check_Cwd_Off)
1540         return;
1541
1542     for (ac = 0; argv[ac] != NULL; ++ac)
1543         /* NOTHING */;
1544     if (ac == 3 && *argv[1] == '-') {
1545         cp =  Check_Cwd_Cmd(argv[2]);
1546     } else {
1547         cp = Check_Cwd_av(ac, UNCONST(argv), 0);
1548     }
1549     if (cp) {
1550         chdir(cp);
1551     }
1552 }
1553
1554 /*-
1555  * Cmd_Exec --
1556  *      Execute the command in cmd, and return the output of that command
1557  *      in a string.
1558  *
1559  * Results:
1560  *      A string containing the output of the command, or the empty string
1561  *      If errnum is not NULL, it contains the reason for the command failure
1562  *
1563  * Side Effects:
1564  *      The string must be freed by the caller.
1565  */
1566 char *
1567 Cmd_Exec(const char *cmd, const char **errnum)
1568 {
1569     const char  *args[4];       /* Args for invoking the shell */
1570     int         fds[2];         /* Pipe streams */
1571     int         cpid;           /* Child PID */
1572     int         pid;            /* PID from wait() */
1573     char        *res;           /* result */
1574     int         status;         /* command exit status */
1575     Buffer      buf;            /* buffer to store the result */
1576     char        *cp;
1577     int         cc;
1578
1579
1580     *errnum = NULL;
1581
1582     if (!shellName)
1583         Shell_Init();
1584     /*
1585      * Set up arguments for shell
1586      */
1587     args[0] = shellName;
1588     args[1] = "-c";
1589     args[2] = cmd;
1590     args[3] = NULL;
1591
1592     /*
1593      * Open a pipe for fetching its output
1594      */
1595     if (pipe(fds) == -1) {
1596         *errnum = "Couldn't create pipe for \"%s\"";
1597         goto bad;
1598     }
1599
1600     /*
1601      * Fork
1602      */
1603     switch (cpid = vFork()) {
1604     case 0:
1605         /*
1606          * Close input side of pipe
1607          */
1608         (void)close(fds[0]);
1609
1610         /*
1611          * Duplicate the output stream to the shell's output, then
1612          * shut the extra thing down. Note we don't fetch the error
1613          * stream...why not? Why?
1614          */
1615         (void)dup2(fds[1], 1);
1616         (void)close(fds[1]);
1617
1618         Var_ExportVars();
1619
1620         (void)execv(shellPath, UNCONST(args));
1621         _exit(1);
1622         /*NOTREACHED*/
1623
1624     case -1:
1625         *errnum = "Couldn't exec \"%s\"";
1626         goto bad;
1627
1628     default:
1629         /*
1630          * No need for the writing half
1631          */
1632         (void)close(fds[1]);
1633
1634         Buf_Init(&buf, 0);
1635
1636         do {
1637             char   result[BUFSIZ];
1638             cc = read(fds[0], result, sizeof(result));
1639             if (cc > 0)
1640                 Buf_AddBytes(&buf, cc, result);
1641         }
1642         while (cc > 0 || (cc == -1 && errno == EINTR));
1643
1644         /*
1645          * Close the input side of the pipe.
1646          */
1647         (void)close(fds[0]);
1648
1649         /*
1650          * Wait for the process to exit.
1651          */
1652         while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) {
1653             JobReapChild(pid, status, FALSE);
1654             continue;
1655         }
1656         cc = Buf_Size(&buf);
1657         res = Buf_Destroy(&buf, FALSE);
1658
1659         if (cc == 0)
1660             *errnum = "Couldn't read shell's output for \"%s\"";
1661
1662         if (WIFSIGNALED(status))
1663             *errnum = "\"%s\" exited on a signal";
1664         else if (WEXITSTATUS(status) != 0)
1665             *errnum = "\"%s\" returned non-zero status";
1666
1667         /*
1668          * Null-terminate the result, convert newlines to spaces and
1669          * install it in the variable.
1670          */
1671         res[cc] = '\0';
1672         cp = &res[cc];
1673
1674         if (cc > 0 && *--cp == '\n') {
1675             /*
1676              * A final newline is just stripped
1677              */
1678             *cp-- = '\0';
1679         }
1680         while (cp >= res) {
1681             if (*cp == '\n') {
1682                 *cp = ' ';
1683             }
1684             cp--;
1685         }
1686         break;
1687     }
1688     return res;
1689 bad:
1690     res = bmake_malloc(1);
1691     *res = '\0';
1692     return res;
1693 }
1694
1695 /*-
1696  * Error --
1697  *      Print an error message given its format.
1698  *
1699  * Results:
1700  *      None.
1701  *
1702  * Side Effects:
1703  *      The message is printed.
1704  */
1705 /* VARARGS */
1706 void
1707 Error(const char *fmt, ...)
1708 {
1709         va_list ap;
1710         FILE *err_file;
1711
1712         err_file = debug_file;
1713         if (err_file == stdout)
1714                 err_file = stderr;
1715         (void)fflush(stdout);
1716         for (;;) {
1717                 va_start(ap, fmt);
1718                 fprintf(err_file, "%s: ", progname);
1719                 (void)vfprintf(err_file, fmt, ap);
1720                 va_end(ap);
1721                 (void)fprintf(err_file, "\n");
1722                 (void)fflush(err_file);
1723                 if (err_file == stderr)
1724                         break;
1725                 err_file = stderr;
1726         }
1727 }
1728
1729 /*-
1730  * Fatal --
1731  *      Produce a Fatal error message. If jobs are running, waits for them
1732  *      to finish.
1733  *
1734  * Results:
1735  *      None
1736  *
1737  * Side Effects:
1738  *      The program exits
1739  */
1740 /* VARARGS */
1741 void
1742 Fatal(const char *fmt, ...)
1743 {
1744         va_list ap;
1745
1746         va_start(ap, fmt);
1747         if (jobsRunning)
1748                 Job_Wait();
1749
1750         (void)fflush(stdout);
1751         (void)vfprintf(stderr, fmt, ap);
1752         va_end(ap);
1753         (void)fprintf(stderr, "\n");
1754         (void)fflush(stderr);
1755
1756         PrintOnError(NULL, NULL);
1757
1758         if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1759                 Targ_PrintGraph(2);
1760         Trace_Log(MAKEERROR, 0);
1761         exit(2);                /* Not 1 so -q can distinguish error */
1762 }
1763
1764 /*
1765  * Punt --
1766  *      Major exception once jobs are being created. Kills all jobs, prints
1767  *      a message and exits.
1768  *
1769  * Results:
1770  *      None
1771  *
1772  * Side Effects:
1773  *      All children are killed indiscriminately and the program Lib_Exits
1774  */
1775 /* VARARGS */
1776 void
1777 Punt(const char *fmt, ...)
1778 {
1779         va_list ap;
1780
1781         va_start(ap, fmt);
1782         (void)fflush(stdout);
1783         (void)fprintf(stderr, "%s: ", progname);
1784         (void)vfprintf(stderr, fmt, ap);
1785         va_end(ap);
1786         (void)fprintf(stderr, "\n");
1787         (void)fflush(stderr);
1788
1789         PrintOnError(NULL, NULL);
1790
1791         DieHorribly();
1792 }
1793
1794 /*-
1795  * DieHorribly --
1796  *      Exit without giving a message.
1797  *
1798  * Results:
1799  *      None
1800  *
1801  * Side Effects:
1802  *      A big one...
1803  */
1804 void
1805 DieHorribly(void)
1806 {
1807         if (jobsRunning)
1808                 Job_AbortAll();
1809         if (DEBUG(GRAPH2))
1810                 Targ_PrintGraph(2);
1811         Trace_Log(MAKEERROR, 0);
1812         exit(2);                /* Not 1, so -q can distinguish error */
1813 }
1814
1815 /*
1816  * Finish --
1817  *      Called when aborting due to errors in child shell to signal
1818  *      abnormal exit.
1819  *
1820  * Results:
1821  *      None
1822  *
1823  * Side Effects:
1824  *      The program exits
1825  */
1826 void
1827 Finish(int errors)
1828                         /* number of errors encountered in Make_Make */
1829 {
1830         Fatal("%d error%s", errors, errors == 1 ? "" : "s");
1831 }
1832
1833 /*
1834  * enunlink --
1835  *      Remove a file carefully, avoiding directories.
1836  */
1837 int
1838 eunlink(const char *file)
1839 {
1840         struct stat st;
1841
1842         if (lstat(file, &st) == -1)
1843                 return -1;
1844
1845         if (S_ISDIR(st.st_mode)) {
1846                 errno = EISDIR;
1847                 return -1;
1848         }
1849         return unlink(file);
1850 }
1851
1852 /*
1853  * execError --
1854  *      Print why exec failed, avoiding stdio.
1855  */
1856 void
1857 execError(const char *af, const char *av)
1858 {
1859 #ifdef USE_IOVEC
1860         int i = 0;
1861         struct iovec iov[8];
1862 #define IOADD(s) \
1863         (void)(iov[i].iov_base = UNCONST(s), \
1864             iov[i].iov_len = strlen(iov[i].iov_base), \
1865             i++)
1866 #else
1867 #define IOADD(void)write(2, s, strlen(s))
1868 #endif
1869
1870         IOADD(progname);
1871         IOADD(": ");
1872         IOADD(af);
1873         IOADD("(");
1874         IOADD(av);
1875         IOADD(") failed (");
1876         IOADD(strerror(errno));
1877         IOADD(")\n");
1878
1879 #ifdef USE_IOVEC
1880         (void)writev(2, iov, 8);
1881 #endif
1882 }
1883
1884 /*
1885  * usage --
1886  *      exit with usage message
1887  */
1888 static void
1889 usage(void)
1890 {
1891         (void)fprintf(stderr,
1892 "usage: %s [-BeikNnqrstWX] \n\
1893             [-C directory] [-D variable] [-d flags] [-f makefile]\n\
1894             [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\
1895             [-V variable] [variable=value] [target ...]\n", progname);
1896         exit(2);
1897 }
1898
1899
1900 int
1901 PrintAddr(void *a, void *b)
1902 {
1903     printf("%lx ", (unsigned long) a);
1904     return b ? 0 : 0;
1905 }
1906
1907
1908
1909 void
1910 PrintOnError(GNode *gn, const char *s)
1911 {
1912     static GNode *en = NULL;
1913     char tmp[64];
1914     char *cp;
1915
1916     if (s)
1917         printf("%s", s);
1918
1919     printf("\n%s: stopped in %s\n", progname, curdir);
1920
1921     if (en)
1922         return;                         /* we've been here! */
1923     if (gn) {
1924         /*
1925          * We can print this even if there is no .ERROR target.
1926          */
1927         Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL, 0);
1928     }
1929     strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
1930             sizeof(tmp) - 1);
1931     cp = Var_Subst(NULL, tmp, VAR_GLOBAL, 0);
1932     if (cp) {
1933         if (*cp)
1934             printf("%s", cp);
1935         free(cp);
1936     }
1937     /*
1938      * Finally, see if there is a .ERROR target, and run it if so.
1939      */
1940     en = Targ_FindNode(".ERROR", TARG_NOCREATE);
1941     if (en) {
1942         en->type |= OP_SPECIAL;
1943         Compat_Make(en, en);
1944     }
1945 }
1946
1947 void
1948 Main_ExportMAKEFLAGS(Boolean first)
1949 {
1950     static int once = 1;
1951     char tmp[64];
1952     char *s;
1953
1954     if (once != first)
1955         return;
1956     once = 0;
1957
1958     strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
1959             sizeof(tmp));
1960     s = Var_Subst(NULL, tmp, VAR_CMD, 0);
1961     if (s && *s) {
1962 #ifdef POSIX
1963         setenv("MAKEFLAGS", s, 1);
1964 #else
1965         setenv("MAKE", s, 1);
1966 #endif
1967     }
1968 }
1969
1970 char *
1971 getTmpdir(void)
1972 {
1973     static char *tmpdir = NULL;
1974
1975     if (!tmpdir) {
1976         struct stat st;
1977
1978         /*
1979          * Honor $TMPDIR but only if it is valid.
1980          * Ensure it ends with /.
1981          */
1982         tmpdir = Var_Subst(NULL, "${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 0);
1983         if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
1984             free(tmpdir);
1985             tmpdir = bmake_strdup(_PATH_TMP);
1986         }
1987     }
1988     return tmpdir;
1989 }
1990
1991 /*
1992  * Create and open a temp file using "pattern".
1993  * If "fnamep" is provided set it to a copy of the filename created.
1994  * Otherwise unlink the file once open.
1995  */
1996 int
1997 mkTempFile(const char *pattern, char **fnamep)
1998 {
1999     static char *tmpdir = NULL;
2000     char tfile[MAXPATHLEN];
2001     int fd;
2002
2003     if (!pattern)
2004         pattern = TMPPAT;
2005     if (!tmpdir)
2006         tmpdir = getTmpdir();
2007     if (pattern[0] == '/') {
2008         snprintf(tfile, sizeof(tfile), "%s", pattern);
2009     } else {
2010         snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern);
2011     }
2012     if ((fd = mkstemp(tfile)) < 0)
2013         Punt("Could not create temporary file %s: %s", tfile, strerror(errno));
2014     if (fnamep) {
2015         *fnamep = bmake_strdup(tfile);
2016     } else {
2017         unlink(tfile);                  /* we just want the descriptor */
2018     }
2019     return fd;
2020 }