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
62 * Error Print a tagged error message. The global
63 * MAKE variable must have been defined. This
64 * takes a format string and two optional
67 * Fatal Print an error message and exit. Also takes
68 * a format string and two arguments.
70 * Punt Aborts all jobs and exits with a message. Also
71 * takes a format string and two arguments.
73 * Finish Finish things up by printing the number of
74 * errors which occured, as passed to it, and
78 #include <sys/types.h>
80 #include <sys/param.h>
81 #include <sys/resource.h>
82 #include <sys/signal.h>
85 #include <sys/sysctl.h>
88 #include <sys/utsname.h>
103 #include "pathnames.h"
106 #define DEFMAXLOCAL DEFMAXJOBS
107 #endif /* DEFMAXLOCAL */
109 #define MAKEFLAGS ".MAKEFLAGS"
111 Lst create; /* Targets to be made */
112 time_t now; /* Time at start of make */
113 GNode *DEFAULT; /* .DEFAULT node */
114 Boolean allPrecious; /* .PRECIOUS given on line by itself */
116 static Boolean noBuiltins; /* -r flag */
117 static Lst makefiles; /* ordered list of makefiles to read */
118 static Boolean printVars; /* print value of one or more vars */
119 static Boolean expandVars; /* fully expand printed variables */
120 static Lst variables; /* list of variables to print */
121 int maxJobs; /* -j argument */
122 static Boolean forceJobs; /* -j argument given */
123 static int maxLocal; /* -L argument */
124 Boolean compatMake; /* -B argument */
125 Boolean debug; /* -d flag */
126 Boolean noExecute; /* -n flag */
127 Boolean keepgoing; /* -k flag */
128 Boolean queryFlag; /* -q flag */
129 Boolean touchFlag; /* -t flag */
130 Boolean usePipes; /* !-P flag */
131 Boolean ignoreErrors; /* -i flag */
132 Boolean beSilent; /* -s flag */
133 Boolean beVerbose; /* -v flag */
134 Boolean oldVars; /* variable substitution style */
135 Boolean checkEnvFirst; /* -e flag */
136 Lst envFirstVars; /* (-E) vars to override from env */
137 static Boolean jobsRunning; /* TRUE if the jobs might be running */
139 static void MainParseArgs(int, char **);
140 char * chdir_verify_path(char *, char *);
141 static int ReadMakefile(void *, void *);
142 static void usage(void);
144 static char *curdir; /* startup directory */
145 static char *objdir; /* where we chdir'ed to */
149 * Parse a given argument vector. Called from main() and from
150 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
152 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
158 * Various global and local flags will be set depending on the flags
162 MainParseArgs(argc, argv)
169 optind = 1; /* since we're called more than once */
171 # define OPTFLAGS "BD:E:I:L:PSV:Xd:ef:ij:km:nqrstv"
173 # define OPTFLAGS "BD:E:I:PSV:Xd:ef:ij:km:nqrstv"
175 rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) {
178 Var_Set(optarg, "1", VAR_GLOBAL);
179 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
180 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
183 Parse_AddIncludeDir(optarg);
184 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
185 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
189 (void)Lst_AtEnd(variables, (void *)optarg);
190 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
191 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
198 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
204 maxLocal = strtol(optarg, &endptr, 10);
205 if (maxLocal < 0 || *endptr != '\0') {
206 warnx("illegal number, -L argument -- %s",
210 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL);
211 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
217 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL);
221 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
224 char *modules = optarg;
226 for (; *modules; ++modules)
244 if (modules[1] == '1') {
245 debug |= DEBUG_GRAPH1;
248 else if (modules[1] == '2') {
249 debug |= DEBUG_GRAPH2;
272 warnx("illegal argument to d option -- %c", *modules);
275 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
276 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
280 p = emalloc(strlen(optarg) + 1);
281 (void)strcpy(p, optarg);
282 (void)Lst_AtEnd(envFirstVars, (void *)p);
283 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL);
284 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
287 checkEnvFirst = TRUE;
288 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
291 (void)Lst_AtEnd(makefiles, (void *)optarg);
295 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
301 maxJobs = strtol(optarg, &endptr, 10);
302 if (maxJobs <= 0 || *endptr != '\0') {
303 warnx("illegal number, -j argument -- %s",
310 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
311 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
316 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
319 Dir_AddDir(sysIncPath, optarg);
320 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
321 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
325 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
329 /* Kind of nonsensical, wot? */
330 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
334 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
338 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
342 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
346 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL);
357 * See if the rest of the arguments are variable assignments and
358 * perform them if so. Else take them to be targets and stuff them
359 * on the end of the "create" list.
361 for (argv += optind, argc -= optind; *argv; ++argv, --argc)
362 if (Parse_IsVar(*argv))
363 Parse_DoVar(*argv, VAR_CMD);
366 Punt("illegal (null) argument.");
369 optind = 0; /* -flag... */
374 (void)Lst_AtEnd(create, (void *)estrdup(*argv));
379 * Main_ParseArgLine --
380 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target
381 * is encountered and by main() when reading the .MAKEFLAGS envariable.
382 * Takes a line of arguments and breaks it into its
383 * component words and passes those words and the number of them to the
384 * MainParseArgs function.
385 * The line should have all its leading whitespace removed.
391 * Only those that come from the various arguments.
394 Main_ParseArgLine(line)
395 char *line; /* Line to fracture */
397 char **argv; /* Manufactured argument vector */
398 int argc; /* Number of arguments in argv */
402 for (; *line == ' '; ++line)
407 argv = brk_string(line, &argc, TRUE);
408 MainParseArgs(argc, argv);
412 chdir_verify_path(path, obpath)
418 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
419 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
420 warn("warning: %s", path);
432 * The main function, for obvious reasons. Initializes variables
433 * and a few modules, then parses the arguments give it in the
434 * environment and on the command line. Reads the system makefile
435 * followed by either Makefile, makefile or the file given by the
436 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the
437 * flags it has received by then uses either the Make or the Compat
438 * module to create the initial list of targets.
441 * If -q was given, exits -1 if anything was out-of-date. Else it exits
445 * The program exits when done. Targets are created. etc. etc. etc.
452 Lst targs; /* target nodes to create -- passed to Make_Init */
453 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */
455 char *p, *p1, *path, *pathp;
456 char mdpath[MAXPATHLEN];
457 char obpath[MAXPATHLEN];
458 char cdpath[MAXPATHLEN];
459 char *machine = getenv("MACHINE");
460 char *machine_arch = getenv("MACHINE_ARCH");
461 char *machine_cpu = getenv("MACHINE_CPU");
462 Lst sysMkPath; /* Path of sys.mk */
463 char *cp = NULL, *start;
464 /* avoid faults on read-only strings */
465 static char syspath[] = _PATH_DEFSYSPATH;
469 * Turn off ENV to make ksh happier.
476 * get rid of resource limit on file descriptors
480 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
481 rl.rlim_cur != rl.rlim_max) {
482 rl.rlim_cur = rl.rlim_max;
483 (void) setrlimit(RLIMIT_NOFILE, &rl);
488 * Find where we are...
489 * All this code is so that we know where we are when we start up
490 * on a different machine with pmake.
493 if (getcwd(curdir, MAXPATHLEN) == NULL)
496 if (stat(curdir, &sa) == -1)
497 err(2, "%s", curdir);
499 #if defined(__i386__) && defined(__FreeBSD_version) && \
500 __FreeBSD_version > 300003
502 * PC-98 kernel sets the `i386' string to the utsname.machine and
503 * it cannot be distinguished from IBM-PC by uname(3). Therefore,
504 * we check machine.ispc98 and adjust the machine variable before
505 * using usname(3) below.
506 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time,
507 * __FreeBSD_version was defined as 300003. So, this check can
508 * safely be done with any kernel with version > 300003.
514 len = sizeof(ispc98);
515 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) {
523 * Get the name of this type of MACHINE from utsname
524 * so we can share an executable for similar machines.
525 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
527 * Note that while MACHINE is decided at run-time,
528 * MACHINE_ARCH is always known at compile time.
532 struct utsname utsname;
534 if (uname(&utsname) == -1)
536 machine = utsname.machine;
544 machine_arch = "unknown";
546 machine_arch = MACHINE_ARCH;
551 * Set machine_cpu to the minumum supported CPU revision based
552 * on the target architecture, if not already set.
555 if (!strcmp(machine_arch, "i386"))
556 machine_cpu = "i386";
557 else if (!strcmp(machine_arch, "alpha"))
560 machine_cpu = "unknown";
564 * The object directory location is determined using the
565 * following order of preference:
567 * 1. MAKEOBJDIRPREFIX`cwd`
569 * 3. _PATH_OBJDIR.${MACHINE}
571 * 5. _PATH_OBJDIRPREFIX`cwd`
573 * If one of the first two fails, use the current directory.
574 * If the remaining three all fail, use the current directory.
576 * Once things are initted,
577 * have to add the original directory to the search path,
578 * and modify the paths for the Makefiles apropriately. The
579 * current directory is also placed as a variable for make scripts.
581 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
582 if (!(path = getenv("MAKEOBJDIR"))) {
584 pathp = _PATH_OBJDIRPREFIX;
585 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s",
587 if (!(objdir = chdir_verify_path(mdpath, obpath)))
588 if (!(objdir=chdir_verify_path(path, obpath))) {
589 (void) snprintf(mdpath, MAXPATHLEN,
590 "%s%s", pathp, curdir);
591 if (!(objdir=chdir_verify_path(mdpath,
596 else if (!(objdir = chdir_verify_path(path, obpath)))
600 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir);
601 if (!(objdir = chdir_verify_path(mdpath, obpath)))
605 create = Lst_Init(FALSE);
606 makefiles = Lst_Init(FALSE);
607 envFirstVars = Lst_Init(FALSE);
610 variables = Lst_Init(FALSE);
611 beSilent = FALSE; /* Print commands as executed */
612 ignoreErrors = FALSE; /* Pay attention to non-zero returns */
613 noExecute = FALSE; /* Execute all commands */
614 keepgoing = FALSE; /* Stop on error */
615 allPrecious = FALSE; /* Remove targets when interrupted */
616 queryFlag = FALSE; /* This is not just a check-run */
617 noBuiltins = FALSE; /* Read the built-in rules */
618 touchFlag = FALSE; /* Actually update targets */
619 usePipes = TRUE; /* Catch child output in pipes */
620 debug = 0; /* No debug verbosity, please. */
623 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */
625 maxJobs = DEFMAXJOBS; /* Set default max concurrency */
629 forceJobs = FALSE; /* No -j flag */
630 compatMake = FALSE; /* No compat mode */
634 * Initialize the parsing, directory and variable modules to prepare
635 * for the reading of inclusion paths and variable settings on the
638 Dir_Init(); /* Initialize directory structures so -I flags
639 * can be processed correctly */
640 Parse_Init(); /* Need to initialize the paths of #include
642 Var_Init(); /* As well as the lists of variables for
643 * parsing arguments */
645 if (objdir != curdir)
646 Dir_AddDir(dirSearchPath, curdir);
647 Var_Set(".CURDIR", curdir, VAR_GLOBAL);
648 Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
651 * Initialize various variables.
652 * MAKE also gets this name, for compatibility
653 * .MAKEFLAGS gets set to the empty string just in case.
654 * MFLAGS also gets initialized empty, for compatibility.
656 Var_Set("MAKE", argv[0], VAR_GLOBAL);
657 Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
658 Var_Set("MFLAGS", "", VAR_GLOBAL);
659 Var_Set("MACHINE", machine, VAR_GLOBAL);
660 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
661 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL);
663 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL);
667 * First snag any flags out of the MAKE environment variable.
668 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
669 * in a different format).
672 Main_ParseArgLine(getenv("MAKEFLAGS"));
674 Main_ParseArgLine(getenv("MAKE"));
677 MainParseArgs(argc, argv);
680 * Be compatible if user did not specify -j and did not explicitly
681 * turned compatibility on
683 if (!compatMake && !forceJobs)
687 * Initialize archive, target and suffix modules in preparation for
688 * parsing the makefile(s)
698 * Set up the .TARGETS variable to contain the list of targets to be
699 * created. If none specified, make the variable empty -- the parser
700 * will fill the thing in with the default or .MAIN target.
702 if (!Lst_IsEmpty(create)) {
705 for (ln = Lst_First(create); ln != NULL;
707 char *name = (char *)Lst_Datum(ln);
709 Var_Append(".TARGETS", name, VAR_GLOBAL);
712 Var_Set(".TARGETS", "", VAR_GLOBAL);
716 * If no user-supplied system path was given (through the -m option)
717 * add the directories from the DEFSYSPATH (more than one may be given
718 * as dir1:...:dirn) to the system include path.
720 if (Lst_IsEmpty(sysIncPath)) {
721 for (start = syspath; *start != '\0'; start = cp) {
722 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
725 Dir_AddDir(sysIncPath, start);
728 Dir_AddDir(sysIncPath, start);
734 * Read in the built-in rules first, followed by the specified
735 * makefile, if it was (makefile != (char *) NULL), or the default
736 * Makefile and makefile, in that order, if it wasn't.
741 sysMkPath = Lst_Init (FALSE);
742 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath);
743 if (Lst_IsEmpty(sysMkPath))
744 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK);
745 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile);
747 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
750 if (!Lst_IsEmpty(makefiles)) {
753 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile);
755 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
756 } else if (!ReadMakefile("BSDmakefile", NULL))
757 if (!ReadMakefile("makefile", NULL))
758 (void)ReadMakefile("Makefile", NULL);
760 (void)ReadMakefile(".depend", NULL);
762 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
765 /* Install all the flags into the MAKE envariable. */
766 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p)
768 setenv("MAKEFLAGS", p, 1);
770 setenv("MAKE", p, 1);
775 * For compatibility, look at the directories in the VPATH variable
776 * and add them to the search path, if the variable is defined. The
777 * variable's value is in the same format as the PATH envariable, i.e.
778 * <directory>:<directory>:<directory>...
780 if (Var_Exists("VPATH", VAR_CMD)) {
781 char *vpath, *path, *cp, savec;
783 * GCC stores string constants in read-only memory, but
784 * Var_Subst will want to write this thing, so store it
787 static char VPATH[] = "${VPATH}";
789 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE);
792 /* skip to end of directory */
793 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
795 /* Save terminator character so know when to stop */
798 /* Add directory to search path */
799 Dir_AddDir(dirSearchPath, path);
802 } while (savec == ':');
807 * Now that all search paths have been read for suffixes et al, it's
808 * time to add the default search path to their lists...
812 /* print the initial graph, if the user requested it */
816 /* print the values of any variables requested by the user */
820 for (ln = Lst_First(variables); ln != NULL;
824 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3);
825 /* This sprintf is safe, because of the malloc above */
826 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln));
827 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE);
829 value = Var_Value((char *)Lst_Datum(ln),
832 printf("%s\n", value ? value : "");
839 * Have now read the entire graph and need to make a list of targets
840 * to create. If none was given on the command line, we consult the
841 * parsing module to find the main target(s) to create.
843 if (Lst_IsEmpty(create))
844 targs = Parse_MainName();
846 targs = Targ_FindList(create, TARG_CREATE);
848 if (!compatMake && !printVars) {
850 * Initialize job module before traversing the graph, now that
851 * any .BEGIN and .END targets have been read. This is done
852 * only if the -q flag wasn't given (to prevent the .BEGIN from
853 * being executed should it exist).
858 Job_Init(maxJobs, maxLocal);
862 /* Traverse the graph, checking on all the targets */
863 outOfDate = Make_Run(targs);
864 } else if (!printVars) {
866 * Compat_Init will take care of creating all the targets as
867 * well as initializing the module.
872 Lst_Destroy(targs, NOFREE);
873 Lst_Destroy(variables, NOFREE);
874 Lst_Destroy(makefiles, NOFREE);
875 Lst_Destroy(create, (void (*)(void *)) free);
877 /* print the graph now it's been processed if the user requested it */
889 if (queryFlag && outOfDate)
897 * Open and parse the given makefile.
900 * TRUE if ok. FALSE if couldn't open file.
910 char *fname = p; /* makefile to read */
911 extern Lst parseIncPath;
913 char *name, path[MAXPATHLEN];
916 if (!strcmp(fname, "-")) {
917 Parse_File("(stdin)", stdin);
918 Var_Set("MAKEFILE", "", VAR_GLOBAL);
920 setMAKEFILE = strcmp(fname, ".depend");
922 /* if we've chdir'd, rebuild the path name */
923 if (curdir != objdir && *fname != '/') {
924 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname);
925 if (realpath(path, path) != NULL &&
926 (stream = fopen(path, "r")) != NULL) {
930 } else if (realpath(fname, path) != NULL) {
932 if ((stream = fopen(fname, "r")) != NULL)
935 /* look in -I and system include directories. */
936 name = Dir_FindFile(fname, parseIncPath);
938 name = Dir_FindFile(fname, sysIncPath);
939 if (!name || !(stream = fopen(name, "r")))
943 * set the MAKEFILE variable desired by System V fans -- the
944 * placement of the setting here means it gets set to the last
945 * makefile specified, as it is set by SysV make.
949 Var_Set("MAKEFILE", fname, VAR_GLOBAL);
950 Parse_File(fname, stream);
951 (void)fclose(stream);
958 * Execute the command in cmd, and return the output of that command
962 * A string containing the output of the command, or the empty string
963 * If err is not NULL, it contains the reason for the command failure
966 * The string must be freed by the caller.
973 char *args[4]; /* Args for invoking the shell */
974 int fds[2]; /* Pipe streams */
975 int cpid; /* Child PID */
976 int pid; /* PID from wait() */
977 char *res; /* result */
978 int status; /* command exit status */
979 Buffer buf; /* buffer to store the result */
987 * Set up arguments for shell
995 * Open a pipe for fetching its output
997 if (pipe(fds) == -1) {
998 *err = "Couldn't create pipe for \"%s\"";
1005 switch (cpid = vfork()) {
1008 * Close input side of pipe
1010 (void) close(fds[0]);
1013 * Duplicate the output stream to the shell's output, then
1014 * shut the extra thing down. Note we don't fetch the error
1015 * stream...why not? Why?
1017 (void) dup2(fds[1], 1);
1018 (void) close(fds[1]);
1021 #ifndef _PATH_DEFSHELLDIR
1022 (void) execvp("sh", args);
1023 #else /* _PATH_DEFSHELLDIR */
1024 (void) execv(_PATH_DEFSHELLDIR"/sh", args);
1025 #endif /* _PATH_DEFSHELLDIR */
1027 #ifndef _PATH_DEFSHELLDIR
1028 (void) execvp("ksh", args);
1029 #else /* _PATH_DEFSHELLDIR */
1030 (void) execv(_PATH_DEFSHELLDIR"/ksh", args);
1031 #endif /* _PATH_DEFSHELLDIR */
1033 #error "DEFSHELL must be 1 or 2."
1039 *err = "Couldn't exec \"%s\"";
1044 * No need for the writing half
1046 (void) close(fds[1]);
1048 buf = Buf_Init (MAKE_BSIZE);
1051 char result[BUFSIZ];
1052 cc = read(fds[0], result, sizeof(result));
1054 Buf_AddBytes(buf, cc, (Byte *) result);
1056 while (cc > 0 || (cc == -1 && errno == EINTR));
1059 * Close the input side of the pipe.
1061 (void) close(fds[0]);
1064 * Wait for the process to exit.
1066 while(((pid = wait(&status)) != cpid) && (pid >= 0))
1070 *err = "Error reading shell's output for \"%s\"";
1072 res = (char *)Buf_GetAll (buf, &cc);
1073 Buf_Destroy (buf, FALSE);
1076 *err = "\"%s\" returned non-zero status";
1079 * Null-terminate the result, convert newlines to spaces and
1080 * install it in the variable.
1087 * A final newline is just stripped
1108 * Print an error message given its format.
1114 * The message is printed.
1118 Error(char *fmt, ...)
1123 (void)vfprintf(stderr, fmt, ap);
1125 (void)fprintf(stderr, "\n");
1126 (void)fflush(stderr);
1131 * Produce a Fatal error message. If jobs are running, waits for them
1142 Fatal(char *fmt, ...)
1150 (void)vfprintf(stderr, fmt, ap);
1152 (void)fprintf(stderr, "\n");
1153 (void)fflush(stderr);
1157 exit(2); /* Not 1 so -q can distinguish error */
1162 * Major exception once jobs are being created. Kills all jobs, prints
1163 * a message and exits.
1169 * All children are killed indiscriminately and the program Lib_Exits
1173 Punt(char *fmt, ...)
1178 (void)fprintf(stderr, "make: ");
1179 (void)vfprintf(stderr, fmt, ap);
1181 (void)fprintf(stderr, "\n");
1182 (void)fflush(stderr);
1189 * Exit without giving a message.
1204 exit(2); /* Not 1, so -q can distinguish error */
1209 * Called when aborting due to errors in child shell to signal
1220 int errors; /* number of errors encountered in Make_Make */
1222 Fatal("%d error%s", errors, errors == 1 ? "" : "s");
1227 * malloc, but die on error.
1235 if ((p = malloc(len)) == NULL)
1242 * strdup, but die on error.
1250 if ((p = strdup(str)) == NULL)
1257 * realloc, but die on error.
1264 if ((ptr = realloc(ptr, size)) == NULL)
1271 * die when out of memory.
1281 * Remove a file carefully, avoiding directories.
1289 if (lstat(file, &st) == -1)
1292 if (S_ISDIR(st.st_mode)) {
1296 return unlink(file);
1301 * exit with usage message
1306 (void)fprintf(stderr, "%s\n%s\n%s\n",
1307 "usage: make [-Beiknqrstv] [-D variable] [-d flags] [-E variable] [-f makefile]",
1308 " [-I directory] [-j max_jobs] [-m directory] [-V variable]",
1309 " [variable=value] [target ...]");
1319 printf("%lx ", (unsigned long) a);