2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1989 by Berkeley Softworks
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)main.c 8.3 (Berkeley) 3/19/94
43 static char copyright[] =
44 "@(#) Copyright (c) 1988, 1989, 1990, 1993\n\
45 The Regents of the University of California. All rights reserved.\n";
48 #include <sys/cdefs.h>
49 __FBSDID("$FreeBSD$");
53 * The main file for this entire program. Exit routines etc
56 * Utility functions defined in this file:
57 * Main_ParseArgLine Takes a line of arguments, breaks them and
58 * treats them as if they were given when first
59 * invoked. Used by the parse module to implement
63 #include <sys/param.h>
64 #include <sys/signal.h>
67 #include <sys/sysctl.h>
70 #include <sys/resource.h>
72 #include <sys/utsname.h>
90 #include "pathnames.h"
92 #define WANT_ENV_MKLVL 1
95 #define DEFMAXLOCAL DEFMAXJOBS
96 #endif /* DEFMAXLOCAL */
98 #define MAKEFLAGS ".MAKEFLAGS"
100 Lst create; /* Targets to be made */
101 time_t now; /* Time at start of make */
102 GNode *DEFAULT; /* .DEFAULT node */
103 Boolean allPrecious; /* .PRECIOUS given on line by itself */
105 static Boolean noBuiltins; /* -r flag */
106 static Lst makefiles; /* ordered list of makefiles to read */
107 static Boolean expandVars; /* fully expand printed variables */
108 static Lst variables; /* list of variables to print */
109 int maxJobs; /* -j argument */
110 static Boolean forceJobs; /* -j argument given */
111 static int maxLocal; /* -L argument */
112 Boolean compatMake; /* -B argument */
113 Boolean debug; /* -d flag */
114 Boolean noExecute; /* -n flag */
115 Boolean keepgoing; /* -k flag */
116 Boolean queryFlag; /* -q flag */
117 Boolean touchFlag; /* -t flag */
118 Boolean usePipes; /* !-P flag */
119 Boolean ignoreErrors; /* -i flag */
120 Boolean beSilent; /* -s flag */
121 Boolean beVerbose; /* -v flag */
122 Boolean oldVars; /* variable substitution style */
123 Boolean checkEnvFirst; /* -e flag */
124 Lst envFirstVars; /* (-E) vars to override from env */
125 Boolean jobsRunning; /* TRUE if the jobs might be running */
127 static void MainParseArgs(int, char **);
128 char * chdir_verify_path(char *, char *);
129 static int ReadMakefile(void *, void *);
130 static void usage(void);
132 static char *curdir; /* startup directory */
133 static char *objdir; /* where we chdir'ed to */
137 * Parse a given argument vector. Called from main() and from
138 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
140 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
146 * Various global and local flags will be set depending on the flags
150 MainParseArgs(int argc, char **argv)
155 optind = 1; /* since we're called more than once */
157 # define OPTFLAGS "BC:D:E:I:L:PSV:Xd:ef:ij:km:nqrstv"
159 # define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv"
161 rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) {
164 if (chdir(optarg) == -1)
165 err(1, "chdir %s", optarg);
168 Var_Set(optarg, "1", VAR_GLOBAL);
169 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
170 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
173 Parse_AddIncludeDir(optarg);
174 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
175 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
178 (void)Lst_AtEnd(variables, (void *)optarg);
179 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
180 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
187 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
193 maxLocal = strtol(optarg, &endptr, 10);
194 if (maxLocal < 0 || *endptr != '\0') {
195 warnx("illegal number, -L argument -- %s",
199 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL);
200 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
206 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL);
210 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
213 char *modules = optarg;
215 for (; *modules; ++modules)
233 if (modules[1] == '1') {
234 debug |= DEBUG_GRAPH1;
237 else if (modules[1] == '2') {
238 debug |= DEBUG_GRAPH2;
261 warnx("illegal argument to d option -- %c", *modules);
264 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
265 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
269 p = emalloc(strlen(optarg) + 1);
270 (void)strcpy(p, optarg);
271 (void)Lst_AtEnd(envFirstVars, (void *)p);
272 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL);
273 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
276 checkEnvFirst = TRUE;
277 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
280 (void)Lst_AtEnd(makefiles, (void *)optarg);
284 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
290 maxJobs = strtol(optarg, &endptr, 10);
291 if (maxJobs <= 0 || *endptr != '\0') {
292 warnx("illegal number, -j argument -- %s",
299 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
300 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
305 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
308 Dir_AddDir(sysIncPath, optarg);
309 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
310 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
314 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
318 /* Kind of nonsensical, wot? */
319 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
323 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
327 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
331 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
335 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL);
346 * See if the rest of the arguments are variable assignments and
347 * perform them if so. Else take them to be targets and stuff them
348 * on the end of the "create" list.
350 for (argv += optind, argc -= optind; *argv; ++argv, --argc)
351 if (Parse_IsVar(*argv))
352 Parse_DoVar(*argv, VAR_CMD);
355 Punt("illegal (null) argument.");
358 optind = 0; /* -flag... */
363 (void)Lst_AtEnd(create, (void *)estrdup(*argv));
368 * Main_ParseArgLine --
369 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target
370 * is encountered and by main() when reading the .MAKEFLAGS envariable.
371 * Takes a line of arguments and breaks it into its
372 * component words and passes those words and the number of them to the
373 * MainParseArgs function.
374 * The line should have all its leading whitespace removed.
380 * Only those that come from the various arguments.
383 Main_ParseArgLine(char *line)
385 char **argv; /* Manufactured argument vector */
386 int argc; /* Number of arguments in argv */
390 for (; *line == ' '; ++line)
395 argv = brk_string(line, &argc, TRUE);
396 MainParseArgs(argc, argv);
400 chdir_verify_path(char *path, char *obpath)
404 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
405 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
406 warn("warning: %s", path);
422 * The main function, for obvious reasons. Initializes variables
423 * and a few modules, then parses the arguments give it in the
424 * environment and on the command line. Reads the system makefile
425 * followed by either Makefile, makefile or the file given by the
426 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the
427 * flags it has received by then uses either the Make or the Compat
428 * module to create the initial list of targets.
431 * If -q was given, exits -1 if anything was out-of-date. Else it exits
435 * The program exits when done. Targets are created. etc. etc. etc.
438 main(int argc, char **argv)
440 Lst targs; /* target nodes to create -- passed to Make_Init */
441 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */
443 char *p, *p1, *path, *pathp;
444 #ifdef WANT_ENV_MKLVL
445 #define MKLVL_MAXVAL 500
446 #define MKLVL_ENVVAR "__MKLVL__"
448 char *szMkLvl = getenv(MKLVL_ENVVAR);
449 #endif /* WANT_ENV_MKLVL */
450 char mdpath[MAXPATHLEN];
451 char obpath[MAXPATHLEN];
452 char cdpath[MAXPATHLEN];
453 char *machine = getenv("MACHINE");
454 char *machine_arch = getenv("MACHINE_ARCH");
455 char *machine_cpu = getenv("MACHINE_CPU");
456 Lst sysMkPath; /* Path of sys.mk */
457 char *cp = NULL, *start;
458 /* avoid faults on read-only strings */
459 static char syspath[] = _PATH_DEFSYSPATH;
463 * Catch SIGCHLD so that we get kicked out of select() when we
464 * need to look at a child. This is only known to matter for the
465 * -j case (perhaps without -P).
467 * XXX this is intentionally misplaced.
471 sigemptyset(&sa.sa_mask);
472 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
473 sa.sa_handler = catch_child;
474 sigaction(SIGCHLD, &sa, NULL);
477 #ifdef WANT_ENV_MKLVL
478 if ((iMkLvl = szMkLvl ? atoi(szMkLvl) : 0) < 0) {
481 if (iMkLvl++ > MKLVL_MAXVAL) {
483 "Max recursion level (%d) exceeded.", MKLVL_MAXVAL);
485 bzero(szMkLvl = emalloc(32), 32);
486 sprintf(szMkLvl, "%d", iMkLvl);
487 setenv(MKLVL_ENVVAR, szMkLvl, 1);
488 #endif /* WANT_ENV_MKLVL */
492 * Turn off ENV to make ksh happier.
499 * get rid of resource limit on file descriptors
503 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
504 rl.rlim_cur != rl.rlim_max) {
505 rl.rlim_cur = rl.rlim_max;
506 (void) setrlimit(RLIMIT_NOFILE, &rl);
512 * PC-98 kernel sets the `i386' string to the utsname.machine and
513 * it cannot be distinguished from IBM-PC by uname(3). Therefore,
514 * we check machine.ispc98 and adjust the machine variable before
515 * using usname(3) below.
516 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time,
517 * __FreeBSD_version was defined as 300003. So, this check can
518 * safely be done with any kernel with version > 300003.
524 len = sizeof(ispc98);
525 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) {
532 * Get the name of this type of MACHINE from utsname
533 * so we can share an executable for similar machines.
534 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
536 * Note that while MACHINE is decided at run-time,
537 * MACHINE_ARCH is always known at compile time.
541 struct utsname utsname;
543 if (uname(&utsname) == -1)
545 machine = utsname.machine;
553 machine_arch = "unknown";
555 machine_arch = MACHINE_ARCH;
560 * Set machine_cpu to the minumum supported CPU revision based
561 * on the target architecture, if not already set.
564 if (!strcmp(machine_arch, "i386"))
565 machine_cpu = "i386";
566 else if (!strcmp(machine_arch, "alpha"))
569 machine_cpu = "unknown";
572 create = Lst_Init(FALSE);
573 makefiles = Lst_Init(FALSE);
574 envFirstVars = Lst_Init(FALSE);
576 variables = Lst_Init(FALSE);
577 beSilent = FALSE; /* Print commands as executed */
578 ignoreErrors = FALSE; /* Pay attention to non-zero returns */
579 noExecute = FALSE; /* Execute all commands */
580 keepgoing = FALSE; /* Stop on error */
581 allPrecious = FALSE; /* Remove targets when interrupted */
582 queryFlag = FALSE; /* This is not just a check-run */
583 noBuiltins = FALSE; /* Read the built-in rules */
584 touchFlag = FALSE; /* Actually update targets */
585 usePipes = TRUE; /* Catch child output in pipes */
586 debug = 0; /* No debug verbosity, please. */
589 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */
591 maxJobs = DEFMAXJOBS; /* Set default max concurrency */
595 forceJobs = FALSE; /* No -j flag */
596 compatMake = FALSE; /* No compat mode */
600 * Initialize the parsing, directory and variable modules to prepare
601 * for the reading of inclusion paths and variable settings on the
604 Dir_Init(); /* Initialize directory structures so -I flags
605 * can be processed correctly */
606 Parse_Init(); /* Need to initialize the paths of #include
608 Var_Init(); /* As well as the lists of variables for
609 * parsing arguments */
613 * Initialize various variables.
614 * MAKE also gets this name, for compatibility
615 * .MAKEFLAGS gets set to the empty string just in case.
616 * MFLAGS also gets initialized empty, for compatibility.
618 Var_Set("MAKE", argv[0], VAR_GLOBAL);
619 Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
620 Var_Set("MFLAGS", "", VAR_GLOBAL);
621 Var_Set("MACHINE", machine, VAR_GLOBAL);
622 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
623 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL);
625 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL);
629 * First snag any flags out of the MAKE environment variable.
630 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
631 * in a different format).
634 Main_ParseArgLine(getenv("MAKEFLAGS"));
636 Main_ParseArgLine(getenv("MAKE"));
639 MainParseArgs(argc, argv);
642 * Find where we are...
643 * All this code is so that we know where we are when we start up
644 * on a different machine with pmake.
647 if (getcwd(curdir, MAXPATHLEN) == NULL)
650 if (stat(curdir, &sa) == -1)
651 err(2, "%s", curdir);
654 * The object directory location is determined using the
655 * following order of preference:
657 * 1. MAKEOBJDIRPREFIX`cwd`
659 * 3. _PATH_OBJDIR.${MACHINE}
661 * 5. _PATH_OBJDIRPREFIX`cwd`
663 * If one of the first two fails, use the current directory.
664 * If the remaining three all fail, use the current directory.
666 * Once things are initted,
667 * have to add the original directory to the search path,
668 * and modify the paths for the Makefiles apropriately. The
669 * current directory is also placed as a variable for make scripts.
671 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
672 if (!(path = getenv("MAKEOBJDIR"))) {
674 pathp = _PATH_OBJDIRPREFIX;
675 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s",
677 if (!(objdir = chdir_verify_path(mdpath, obpath)))
678 if (!(objdir=chdir_verify_path(path, obpath))) {
679 (void) snprintf(mdpath, MAXPATHLEN,
680 "%s%s", pathp, curdir);
681 if (!(objdir=chdir_verify_path(mdpath,
686 else if (!(objdir = chdir_verify_path(path, obpath)))
690 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir);
691 if (!(objdir = chdir_verify_path(mdpath, obpath)))
694 Dir_InitDot(); /* Initialize the "." directory */
695 if (objdir != curdir)
696 Dir_AddDir(dirSearchPath, curdir);
697 Var_Set(".CURDIR", curdir, VAR_GLOBAL);
698 Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
701 * Be compatible if user did not specify -j and did not explicitly
702 * turned compatibility on
704 if (!compatMake && !forceJobs)
708 * Initialize archive, target and suffix modules in preparation for
709 * parsing the makefile(s)
719 * Set up the .TARGETS variable to contain the list of targets to be
720 * created. If none specified, make the variable empty -- the parser
721 * will fill the thing in with the default or .MAIN target.
723 if (!Lst_IsEmpty(create)) {
726 for (ln = Lst_First(create); ln != NULL;
728 char *name = (char *)Lst_Datum(ln);
730 Var_Append(".TARGETS", name, VAR_GLOBAL);
733 Var_Set(".TARGETS", "", VAR_GLOBAL);
737 * If no user-supplied system path was given (through the -m option)
738 * add the directories from the DEFSYSPATH (more than one may be given
739 * as dir1:...:dirn) to the system include path.
741 if (Lst_IsEmpty(sysIncPath)) {
742 for (start = syspath; *start != '\0'; start = cp) {
743 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
746 Dir_AddDir(sysIncPath, start);
749 Dir_AddDir(sysIncPath, start);
755 * Read in the built-in rules first, followed by the specified
756 * makefile, if it was (makefile != (char *) NULL), or the default
757 * Makefile and makefile, in that order, if it wasn't.
762 sysMkPath = Lst_Init (FALSE);
763 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath);
764 if (Lst_IsEmpty(sysMkPath))
765 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK);
766 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile);
768 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
771 if (!Lst_IsEmpty(makefiles)) {
774 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile);
776 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
777 } else if (!ReadMakefile("BSDmakefile", NULL))
778 if (!ReadMakefile("makefile", NULL))
779 (void)ReadMakefile("Makefile", NULL);
781 (void)ReadMakefile(".depend", NULL);
783 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
786 /* Install all the flags into the MAKE envariable. */
787 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p)
789 setenv("MAKEFLAGS", p, 1);
791 setenv("MAKE", p, 1);
796 * For compatibility, look at the directories in the VPATH variable
797 * and add them to the search path, if the variable is defined. The
798 * variable's value is in the same format as the PATH envariable, i.e.
799 * <directory>:<directory>:<directory>...
801 if (Var_Exists("VPATH", VAR_CMD)) {
804 * GCC stores string constants in read-only memory, but
805 * Var_Subst will want to write this thing, so store it
808 static char VPATH[] = "${VPATH}";
810 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE);
813 /* skip to end of directory */
814 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
816 /* Save terminator character so know when to stop */
819 /* Add directory to search path */
820 Dir_AddDir(dirSearchPath, path);
823 } while (savec == ':');
828 * Now that all search paths have been read for suffixes et al, it's
829 * time to add the default search path to their lists...
833 /* print the initial graph, if the user requested it */
837 /* print the values of any variables requested by the user */
838 if (!Lst_IsEmpty(variables)) {
841 for (ln = Lst_First(variables); ln != NULL;
845 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3);
846 /* This sprintf is safe, because of the malloc above */
847 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln));
848 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE);
850 value = Var_Value((char *)Lst_Datum(ln),
853 printf("%s\n", value ? value : "");
860 * Have now read the entire graph and need to make a list of targets
861 * to create. If none was given on the command line, we consult the
862 * parsing module to find the main target(s) to create.
864 if (Lst_IsEmpty(create))
865 targs = Parse_MainName();
867 targs = Targ_FindList(create, TARG_CREATE);
871 * Initialize job module before traversing the graph, now that
872 * any .BEGIN and .END targets have been read. This is done
873 * only if the -q flag wasn't given (to prevent the .BEGIN from
874 * being executed should it exist).
879 Job_Init(maxJobs, maxLocal);
883 /* Traverse the graph, checking on all the targets */
884 outOfDate = Make_Run(targs);
887 * Compat_Init will take care of creating all the targets as
888 * well as initializing the module.
893 Lst_Destroy(targs, NOFREE);
896 Lst_Destroy(variables, NOFREE);
897 Lst_Destroy(makefiles, NOFREE);
898 Lst_Destroy(create, (void (*)(void *)) free);
900 /* print the graph now it's been processed if the user requested it */
912 if (queryFlag && outOfDate)
920 * Open and parse the given makefile.
923 * TRUE if ok. FALSE if couldn't open file.
929 ReadMakefile(void *p, void *q __unused)
931 char *fname; /* makefile to read */
933 char *name, path[MAXPATHLEN];
939 if (!strcmp(fname, "-")) {
940 Parse_File("(stdin)", stdin);
941 Var_Set("MAKEFILE", "", VAR_GLOBAL);
943 setMAKEFILE = strcmp(fname, ".depend");
945 /* if we've chdir'd, rebuild the path name */
946 if (curdir != objdir && *fname != '/') {
947 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname);
949 * XXX The realpath stuff breaks relative includes
950 * XXX in some cases. The problem likely is in
951 * XXX parse.c where it does special things in
952 * XXX ParseDoInclude if the file is relateive
953 * XXX or absolute and not a system file. There
954 * XXX it assumes that if the current file that's
955 * XXX being included is absolute, that any files
956 * XXX that it includes shouldn't do the -I path
957 * XXX stuff, which is inconsistant with historical
958 * XXX behavior. However, I can't pentrate the mists
959 * XXX further, so I'm putting this workaround in
960 * XXX here until such time as the underlying bug
963 #if THIS_BREAKS_THINGS
964 if (realpath(path, path) != NULL &&
965 (stream = fopen(path, "r")) != NULL) {
970 } else if (realpath(fname, path) != NULL) {
973 if ((stream = fopen(fname, "r")) != NULL)
977 if ((stream = fopen(path, "r")) != NULL) {
984 if ((stream = fopen(fname, "r")) != NULL)
988 /* look in -I and system include directories. */
989 name = Dir_FindFile(fname, parseIncPath);
991 name = Dir_FindFile(fname, sysIncPath);
992 if (!name || !(stream = fopen(name, "r")))
994 MAKEFILE = fname = name;
996 * set the MAKEFILE variable desired by System V fans -- the
997 * placement of the setting here means it gets set to the last
998 * makefile specified, as it is set by SysV make.
1002 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL);
1003 Parse_File(fname, stream);
1004 (void)fclose(stream);
1011 * Execute the command in cmd, and return the output of that command
1015 * A string containing the output of the command, or the empty string
1016 * If error is not NULL, it contains the reason for the command failure
1019 * The string must be freed by the caller.
1022 Cmd_Exec(char *cmd, char **error)
1024 char *args[4]; /* Args for invoking the shell */
1025 int fds[2]; /* Pipe streams */
1026 int cpid; /* Child PID */
1027 int pid; /* PID from wait() */
1028 char *res; /* result */
1029 int status; /* command exit status */
1030 Buffer buf; /* buffer to store the result */
1037 * Set up arguments for shell
1045 * Open a pipe for fetching its output
1047 if (pipe(fds) == -1) {
1048 *error = "Couldn't create pipe for \"%s\"";
1055 switch (cpid = vfork()) {
1058 * Close input side of pipe
1060 (void) close(fds[0]);
1063 * Duplicate the output stream to the shell's output, then
1064 * shut the extra thing down. Note we don't fetch the error
1065 * stream...why not? Why?
1067 (void) dup2(fds[1], 1);
1068 (void) close(fds[1]);
1070 #if defined(DEFSHELL) && DEFSHELL == 0
1071 (void) execv("/bin/csh", args);
1073 (void) execv("/bin/sh", args);
1075 (void) execv("/bin/ksh", args);
1077 #error "DEFSHELL must be 1 or 2."
1083 *error = "Couldn't exec \"%s\"";
1088 * No need for the writing half
1090 (void) close(fds[1]);
1092 buf = Buf_Init (MAKE_BSIZE);
1095 char result[BUFSIZ];
1096 cc = read(fds[0], result, sizeof(result));
1098 Buf_AddBytes(buf, cc, (Byte *) result);
1100 while (cc > 0 || (cc == -1 && errno == EINTR));
1103 * Close the input side of the pipe.
1105 (void) close(fds[0]);
1108 * Wait for the process to exit.
1110 while(((pid = wait(&status)) != cpid) && (pid >= 0))
1114 *error = "Error reading shell's output for \"%s\"";
1116 res = (char *)Buf_GetAll (buf, &cc);
1117 Buf_Destroy (buf, FALSE);
1120 *error = "\"%s\" returned non-zero status";
1123 * Null-terminate the result, convert newlines to spaces and
1124 * install it in the variable.
1131 * A final newline is just stripped
1152 * exit with usage message
1157 (void)fprintf(stderr, "%s\n%s\n%s\n",
1158 "usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]",
1159 " [-E variable] [-f makefile] [-I directory] [-j max_jobs]",
1160 " [-m directory] [-V variable] [variable=value] [target ...]");