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
42 #include <sys/cdefs.h>
43 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 The Regents of the University of California. All rights reserved.");
49 * The main file for this entire program. Exit routines etc
52 * Utility functions defined in this file:
53 * Main_ParseArgLine Takes a line of arguments, breaks them and
54 * treats them as if they were given when first
55 * invoked. Used by the parse module to implement
58 * Error Print a tagged error message. The global
59 * MAKE variable must have been defined. This
60 * takes a format string and two optional
63 * Fatal Print an error message and exit. Also takes
64 * a format string and two arguments.
66 * Punt Aborts all jobs and exits with a message. Also
67 * takes a format string and two arguments.
69 * Finish Finish things up by printing the number of
70 * errors which occured, as passed to it, and
74 #include <sys/types.h>
76 #include <sys/param.h>
77 #include <sys/resource.h>
78 #include <sys/signal.h>
81 #include <sys/sysctl.h>
84 #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 __P((int, char **));
140 char * chdir_verify_path __P((char *, char *));
141 static int ReadMakefile __P((void *, void *));
142 static void usage __P((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 = malloc(strlen(optarg) + 1);
282 Punt("make: cannot allocate memory.");
283 (void)strcpy(p, optarg);
284 (void)Lst_AtEnd(envFirstVars, (void *)p);
285 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL);
286 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
289 checkEnvFirst = TRUE;
290 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
293 (void)Lst_AtEnd(makefiles, (void *)optarg);
297 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
303 maxJobs = strtol(optarg, &endptr, 10);
304 if (maxJobs <= 0 || *endptr != '\0') {
305 warnx("illegal number, -j argument -- %s",
312 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
313 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
318 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
321 Dir_AddDir(sysIncPath, optarg);
322 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
323 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
327 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
331 /* Kind of nonsensical, wot? */
332 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
336 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
340 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
344 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
348 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL);
359 * See if the rest of the arguments are variable assignments and
360 * perform them if so. Else take them to be targets and stuff them
361 * on the end of the "create" list.
363 for (argv += optind, argc -= optind; *argv; ++argv, --argc)
364 if (Parse_IsVar(*argv))
365 Parse_DoVar(*argv, VAR_CMD);
368 Punt("illegal (null) argument.");
371 optind = 0; /* -flag... */
376 (void)Lst_AtEnd(create, (void *)estrdup(*argv));
381 * Main_ParseArgLine --
382 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target
383 * is encountered and by main() when reading the .MAKEFLAGS envariable.
384 * Takes a line of arguments and breaks it into its
385 * component words and passes those words and the number of them to the
386 * MainParseArgs function.
387 * The line should have all its leading whitespace removed.
393 * Only those that come from the various arguments.
396 Main_ParseArgLine(line)
397 char *line; /* Line to fracture */
399 char **argv; /* Manufactured argument vector */
400 int argc; /* Number of arguments in argv */
404 for (; *line == ' '; ++line)
409 argv = brk_string(line, &argc, TRUE);
410 MainParseArgs(argc, argv);
414 chdir_verify_path(path, obpath)
420 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
421 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
422 warn("warning: %s", path);
434 * The main function, for obvious reasons. Initializes variables
435 * and a few modules, then parses the arguments give it in the
436 * environment and on the command line. Reads the system makefile
437 * followed by either Makefile, makefile or the file given by the
438 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the
439 * flags it has received by then uses either the Make or the Compat
440 * module to create the initial list of targets.
443 * If -q was given, exits -1 if anything was out-of-date. Else it exits
447 * The program exits when done. Targets are created. etc. etc. etc.
454 Lst targs; /* target nodes to create -- passed to Make_Init */
455 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */
457 char *p, *p1, *path, *pathp;
458 char mdpath[MAXPATHLEN];
459 char obpath[MAXPATHLEN];
460 char cdpath[MAXPATHLEN];
461 char *machine = getenv("MACHINE");
462 char *machine_arch = getenv("MACHINE_ARCH");
463 char *machine_cpu = getenv("MACHINE_CPU");
464 Lst sysMkPath; /* Path of sys.mk */
465 char *cp = NULL, *start;
466 /* avoid faults on read-only strings */
467 static char syspath[] = _PATH_DEFSYSPATH;
471 * Turn off ENV to make ksh happier.
478 * get rid of resource limit on file descriptors
482 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
483 rl.rlim_cur != rl.rlim_max) {
484 rl.rlim_cur = rl.rlim_max;
485 (void) setrlimit(RLIMIT_NOFILE, &rl);
490 * Find where we are...
491 * All this code is so that we know where we are when we start up
492 * on a different machine with pmake.
495 if (getcwd(curdir, MAXPATHLEN) == NULL)
498 if (stat(curdir, &sa) == -1)
499 err(2, "%s", curdir);
501 #if defined(__i386__) && defined(__FreeBSD_version) && \
502 __FreeBSD_version > 300003
504 * PC-98 kernel sets the `i386' string to the utsname.machine and
505 * it cannot be distinguished from IBM-PC by uname(3). Therefore,
506 * we check machine.ispc98 and adjust the machine variable before
507 * using usname(3) below.
508 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time,
509 * __FreeBSD_version was defined as 300003. So, this check can
510 * safely be done with any kernel with version > 300003.
516 len = sizeof(ispc98);
517 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) {
525 * Get the name of this type of MACHINE from utsname
526 * so we can share an executable for similar machines.
527 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
529 * Note that while MACHINE is decided at run-time,
530 * MACHINE_ARCH is always known at compile time.
534 struct utsname utsname;
536 if (uname(&utsname) == -1) {
537 perror("make: uname");
540 machine = utsname.machine;
548 machine_arch = "unknown";
550 machine_arch = MACHINE_ARCH;
555 * Set machine_cpu to the minumum supported CPU revision based
556 * on the target architecture, if not already set.
559 if (!strcmp(machine_arch, "i386"))
560 machine_cpu = "i386";
561 else if (!strcmp(machine_arch, "alpha"))
564 machine_cpu = "unknown";
568 * The object directory location is determined using the
569 * following order of preference:
571 * 1. MAKEOBJDIRPREFIX`cwd`
573 * 3. _PATH_OBJDIR.${MACHINE}
575 * 5. _PATH_OBJDIRPREFIX`cwd`
577 * If one of the first two fails, use the current directory.
578 * If the remaining three all fail, use the current directory.
580 * Once things are initted,
581 * have to add the original directory to the search path,
582 * and modify the paths for the Makefiles apropriately. The
583 * current directory is also placed as a variable for make scripts.
585 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
586 if (!(path = getenv("MAKEOBJDIR"))) {
588 pathp = _PATH_OBJDIRPREFIX;
589 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s",
591 if (!(objdir = chdir_verify_path(mdpath, obpath)))
592 if (!(objdir=chdir_verify_path(path, obpath))) {
593 (void) snprintf(mdpath, MAXPATHLEN,
594 "%s%s", pathp, curdir);
595 if (!(objdir=chdir_verify_path(mdpath,
600 else if (!(objdir = chdir_verify_path(path, obpath)))
604 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir);
605 if (!(objdir = chdir_verify_path(mdpath, obpath)))
609 create = Lst_Init(FALSE);
610 makefiles = Lst_Init(FALSE);
611 envFirstVars = Lst_Init(FALSE);
614 variables = Lst_Init(FALSE);
615 beSilent = FALSE; /* Print commands as executed */
616 ignoreErrors = FALSE; /* Pay attention to non-zero returns */
617 noExecute = FALSE; /* Execute all commands */
618 keepgoing = FALSE; /* Stop on error */
619 allPrecious = FALSE; /* Remove targets when interrupted */
620 queryFlag = FALSE; /* This is not just a check-run */
621 noBuiltins = FALSE; /* Read the built-in rules */
622 touchFlag = FALSE; /* Actually update targets */
623 usePipes = TRUE; /* Catch child output in pipes */
624 debug = 0; /* No debug verbosity, please. */
627 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */
629 maxJobs = DEFMAXJOBS; /* Set default max concurrency */
633 forceJobs = FALSE; /* No -j flag */
634 compatMake = FALSE; /* No compat mode */
638 * Initialize the parsing, directory and variable modules to prepare
639 * for the reading of inclusion paths and variable settings on the
642 Dir_Init(); /* Initialize directory structures so -I flags
643 * can be processed correctly */
644 Parse_Init(); /* Need to initialize the paths of #include
646 Var_Init(); /* As well as the lists of variables for
647 * parsing arguments */
649 if (objdir != curdir)
650 Dir_AddDir(dirSearchPath, curdir);
651 Var_Set(".CURDIR", curdir, VAR_GLOBAL);
652 Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
655 * Initialize various variables.
656 * MAKE also gets this name, for compatibility
657 * .MAKEFLAGS gets set to the empty string just in case.
658 * MFLAGS also gets initialized empty, for compatibility.
660 Var_Set("MAKE", argv[0], VAR_GLOBAL);
661 Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
662 Var_Set("MFLAGS", "", VAR_GLOBAL);
663 Var_Set("MACHINE", machine, VAR_GLOBAL);
664 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
665 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL);
668 * First snag any flags out of the MAKE environment variable.
669 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
670 * in a different format).
673 Main_ParseArgLine(getenv("MAKEFLAGS"));
675 Main_ParseArgLine(getenv("MAKE"));
678 MainParseArgs(argc, argv);
681 * Be compatible if user did not specify -j and did not explicitly
682 * turned compatibility on
684 if (!compatMake && !forceJobs)
688 * Initialize archive, target and suffix modules in preparation for
689 * parsing the makefile(s)
699 * Set up the .TARGETS variable to contain the list of targets to be
700 * created. If none specified, make the variable empty -- the parser
701 * will fill the thing in with the default or .MAIN target.
703 if (!Lst_IsEmpty(create)) {
706 for (ln = Lst_First(create); ln != NULL;
708 char *name = (char *)Lst_Datum(ln);
710 Var_Append(".TARGETS", name, VAR_GLOBAL);
713 Var_Set(".TARGETS", "", VAR_GLOBAL);
717 * If no user-supplied system path was given (through the -m option)
718 * add the directories from the DEFSYSPATH (more than one may be given
719 * as dir1:...:dirn) to the system include path.
721 if (Lst_IsEmpty(sysIncPath)) {
722 for (start = syspath; *start != '\0'; start = cp) {
723 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
726 Dir_AddDir(sysIncPath, start);
729 Dir_AddDir(sysIncPath, start);
735 * Read in the built-in rules first, followed by the specified
736 * makefile, if it was (makefile != (char *) NULL), or the default
737 * Makefile and makefile, in that order, if it wasn't.
742 sysMkPath = Lst_Init (FALSE);
743 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath);
744 if (Lst_IsEmpty(sysMkPath))
745 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK);
746 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile);
748 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
751 if (!Lst_IsEmpty(makefiles)) {
754 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile);
756 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
757 } else 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 = malloc(strlen((char *)Lst_Datum(ln)) + 1 + 3);
826 Punt("make: cannot allocate memory.");
827 /* This sprintf is safe, because of the malloc above */
828 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln));
829 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE);
831 value = Var_Value((char *)Lst_Datum(ln),
834 printf("%s\n", value ? value : "");
841 * Have now read the entire graph and need to make a list of targets
842 * to create. If none was given on the command line, we consult the
843 * parsing module to find the main target(s) to create.
845 if (Lst_IsEmpty(create))
846 targs = Parse_MainName();
848 targs = Targ_FindList(create, TARG_CREATE);
850 if (!compatMake && !printVars) {
852 * Initialize job module before traversing the graph, now that
853 * any .BEGIN and .END targets have been read. This is done
854 * only if the -q flag wasn't given (to prevent the .BEGIN from
855 * being executed should it exist).
860 Job_Init(maxJobs, maxLocal);
864 /* Traverse the graph, checking on all the targets */
865 outOfDate = Make_Run(targs);
866 } else if (!printVars) {
868 * Compat_Init will take care of creating all the targets as
869 * well as initializing the module.
874 Lst_Destroy(targs, NOFREE);
875 Lst_Destroy(variables, NOFREE);
876 Lst_Destroy(makefiles, NOFREE);
877 Lst_Destroy(create, (void (*) __P((void *))) free);
879 /* print the graph now it's been processed if the user requested it */
891 if (queryFlag && outOfDate)
899 * Open and parse the given makefile.
902 * TRUE if ok. FALSE if couldn't open file.
912 char *fname = p; /* makefile to read */
913 extern Lst parseIncPath;
915 char *name, path[MAXPATHLEN];
917 if (!strcmp(fname, "-")) {
918 Parse_File("(stdin)", stdin);
919 Var_Set("MAKEFILE", "", VAR_GLOBAL);
921 /* if we've chdir'd, rebuild the path name */
922 if (curdir != objdir && *fname != '/') {
923 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname);
924 if ((stream = fopen(path, "r")) != NULL) {
928 } else if ((stream = fopen(fname, "r")) != NULL)
930 /* look in -I and system include directories. */
931 name = Dir_FindFile(fname, parseIncPath);
933 name = Dir_FindFile(fname, sysIncPath);
934 if (!name || !(stream = fopen(name, "r")))
938 * set the MAKEFILE variable desired by System V fans -- the
939 * placement of the setting here means it gets set to the last
940 * makefile specified, as it is set by SysV make.
942 found: Var_Set("MAKEFILE", fname, VAR_GLOBAL);
943 Parse_File(fname, stream);
944 (void)fclose(stream);
951 * Execute the command in cmd, and return the output of that command
955 * A string containing the output of the command, or the empty string
956 * If err is not NULL, it contains the reason for the command failure
959 * The string must be freed by the caller.
966 char *args[4]; /* Args for invoking the shell */
967 int fds[2]; /* Pipe streams */
968 int cpid; /* Child PID */
969 int pid; /* PID from wait() */
970 char *res; /* result */
971 int status; /* command exit status */
972 Buffer buf; /* buffer to store the result */
980 * Set up arguments for shell
988 * Open a pipe for fetching its output
990 if (pipe(fds) == -1) {
991 *err = "Couldn't create pipe for \"%s\"";
998 switch (cpid = vfork()) {
1001 * Close input side of pipe
1003 (void) close(fds[0]);
1006 * Duplicate the output stream to the shell's output, then
1007 * shut the extra thing down. Note we don't fetch the error
1008 * stream...why not? Why?
1010 (void) dup2(fds[1], 1);
1011 (void) close(fds[1]);
1014 (void) execv("/bin/sh", args);
1016 (void) execv("/bin/ksh", args);
1018 #error "DEFSHELL must be 1 or 2."
1024 *err = "Couldn't exec \"%s\"";
1029 * No need for the writing half
1031 (void) close(fds[1]);
1033 buf = Buf_Init (MAKE_BSIZE);
1036 char result[BUFSIZ];
1037 cc = read(fds[0], result, sizeof(result));
1039 Buf_AddBytes(buf, cc, (Byte *) result);
1041 while (cc > 0 || (cc == -1 && errno == EINTR));
1044 * Close the input side of the pipe.
1046 (void) close(fds[0]);
1049 * Wait for the process to exit.
1051 while(((pid = wait(&status)) != cpid) && (pid >= 0))
1055 *err = "Error reading shell's output for \"%s\"";
1057 res = (char *)Buf_GetAll (buf, &cc);
1058 Buf_Destroy (buf, FALSE);
1061 *err = "\"%s\" returned non-zero status";
1064 * Null-terminate the result, convert newlines to spaces and
1065 * install it in the variable.
1072 * A final newline is just stripped
1093 * Print an error message given its format.
1099 * The message is printed.
1104 Error(char *fmt, ...)
1117 fmt = va_arg(ap, char *);
1119 (void)vfprintf(stderr, fmt, ap);
1121 (void)fprintf(stderr, "\n");
1122 (void)fflush(stderr);
1127 * Produce a Fatal error message. If jobs are running, waits for them
1139 Fatal(char *fmt, ...)
1152 fmt = va_arg(ap, char *);
1157 (void)vfprintf(stderr, fmt, ap);
1159 (void)fprintf(stderr, "\n");
1160 (void)fflush(stderr);
1164 exit(2); /* Not 1 so -q can distinguish error */
1169 * Major exception once jobs are being created. Kills all jobs, prints
1170 * a message and exits.
1176 * All children are killed indiscriminately and the program Lib_Exits
1181 Punt(char *fmt, ...)
1194 fmt = va_arg(ap, char *);
1197 (void)fprintf(stderr, "make: ");
1198 (void)vfprintf(stderr, fmt, ap);
1200 (void)fprintf(stderr, "\n");
1201 (void)fflush(stderr);
1208 * Exit without giving a message.
1223 exit(2); /* Not 1, so -q can distinguish error */
1228 * Called when aborting due to errors in child shell to signal
1239 int errors; /* number of errors encountered in Make_Make */
1241 Fatal("%d error%s", errors, errors == 1 ? "" : "s");
1246 * malloc, but die on error.
1254 if ((p = malloc(len)) == NULL)
1261 * strdup, but die on error.
1269 if ((p = strdup(str)) == NULL)
1276 * realloc, but die on error.
1283 if ((ptr = realloc(ptr, size)) == NULL)
1290 * die when out of memory.
1300 * Remove a file carefully, avoiding directories.
1308 if (lstat(file, &st) == -1)
1311 if (S_ISDIR(st.st_mode)) {
1315 return unlink(file);
1320 * exit with usage message
1325 (void)fprintf(stderr, "%s\n%s\n%s\n",
1326 "usage: make [-Beiknqrstv] [-D variable] [-d flags] [-E variable] [-f makefile]",
1327 " [-I directory] [-j max_jobs] [-m directory] [-V variable]",
1328 " [variable=value] [target ...]");
1338 printf("%lx ", (unsigned long) a);