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NetBSD/usr.bin/make/main.c
agc 89aaa1bb64 Move UCB-licensed code from 4-clause to 3-clause licence. 
Patches provided by Joel Baker in PR 22365, verified by myself.
2003-08-07 11:13:06 +00:00

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/* $NetBSD: main.c,v 1.91 2003/08/07 11:14:53 agc Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef MAKE_BOOTSTRAP
static char rcsid[] = "$NetBSD: main.c,v 1.91 2003/08/07 11:14:53 agc Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 3/19/94";
#else
__RCSID("$NetBSD: main.c,v 1.91 2003/08/07 11:14:53 agc Exp $");
#endif
#endif /* not lint */
#endif
/*-
* main.c --
* The main file for this entire program. Exit routines etc
* reside here.
*
* Utility functions defined in this file:
* Main_ParseArgLine Takes a line of arguments, breaks them and
* treats them as if they were given when first
* invoked. Used by the parse module to implement
* the .MFLAGS target.
*
* Error Print a tagged error message. The global
* MAKE variable must have been defined. This
* takes a format string and two optional
* arguments for it.
*
* Fatal Print an error message and exit. Also takes
* a format string and two arguments.
*
* Punt Aborts all jobs and exits with a message. Also
* takes a format string and two arguments.
*
* Finish Finish things up by printing the number of
* errors which occurred, as passed to it, and
* exiting.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/signal.h>
#include <sys/stat.h>
#ifndef MAKE_BOOTSTRAP
#include <sys/utsname.h>
#endif
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "job.h"
#include "pathnames.h"
#include "trace.h"
#ifdef USE_IOVEC
#include <sys/uio.h>
#endif
#ifndef DEFMAXLOCAL
#define DEFMAXLOCAL DEFMAXJOBS
#endif /* DEFMAXLOCAL */
Lst create; /* Targets to be made */
time_t now; /* Time at start of make */
GNode *DEFAULT; /* .DEFAULT node */
Boolean allPrecious; /* .PRECIOUS given on line by itself */
static Boolean noBuiltins; /* -r flag */
static Lst makefiles; /* ordered list of makefiles to read */
static Boolean printVars; /* print value of one or more vars */
static Lst variables; /* list of variables to print */
int maxJobs; /* -j argument */
static int maxLocal; /* -L argument */
Boolean compatMake; /* -B argument */
Boolean debug; /* -d flag */
Boolean noExecute; /* -n flag */
Boolean noRecursiveExecute; /* -N flag */
Boolean keepgoing; /* -k flag */
Boolean queryFlag; /* -q flag */
Boolean touchFlag; /* -t flag */
Boolean usePipes; /* !-P flag */
Boolean ignoreErrors; /* -i flag */
Boolean beSilent; /* -s flag */
Boolean oldVars; /* variable substitution style */
Boolean checkEnvFirst; /* -e flag */
Boolean parseWarnFatal; /* -W flag */
Boolean jobServer; /* -J flag */
Boolean varNoExportEnv; /* -X flag */
static Boolean jobsRunning; /* TRUE if the jobs might be running */
static const char * tracefile;
static char * Check_Cwd_av(int, char **, int);
static void MainParseArgs(int, char **);
static int ReadMakefile(ClientData, ClientData);
static void usage(void);
static char curdir[MAXPATHLEN + 1]; /* startup directory */
static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */
char *progname; /* the program name */
Boolean forceJobs = FALSE;
extern Lst parseIncPath;
/*-
* MainParseArgs --
* Parse a given argument vector. Called from main() and from
* Main_ParseArgLine() when the .MAKEFLAGS target is used.
*
* XXX: Deal with command line overriding .MAKEFLAGS in makefile
*
* Results:
* None
*
* Side Effects:
* Various global and local flags will be set depending on the flags
* given
*/
static void
MainParseArgs(int argc, char **argv)
{
char *p;
int c;
optind = 1; /* since we're called more than once */
#ifdef REMOTE
# define OPTFLAGS "BD:I:J:L:NPST:V:WXd:ef:ij:km:nqrst"
#else
# define OPTFLAGS "BD:I:J:NPST:V:WXd:ef:ij:km:nqrst"
#endif
rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) {
switch(c) {
case 'D':
Var_Set(optarg, "1", VAR_GLOBAL, 0);
Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'I':
Parse_AddIncludeDir(optarg);
Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'J':
if (sscanf(optarg, "%d,%d", &job_pipe[0], &job_pipe[1]) != 2) {
/* backslash to avoid trigraph ??) */
(void)fprintf(stderr,
"%s: internal error -- J option malformed (%s?\?)\n",
progname, optarg);
usage();
}
if ((fcntl(job_pipe[0], F_GETFD, 0) < 0) ||
(fcntl(job_pipe[1], F_GETFD, 0) < 0)) {
#if 0
(void)fprintf(stderr,
"%s: warning -- J descriptors were closed!\n",
progname);
#endif
job_pipe[0] = -1;
job_pipe[1] = -1;
compatMake = TRUE;
} else {
Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
jobServer = TRUE;
}
break;
case 'V':
printVars = TRUE;
(void)Lst_AtEnd(variables, (ClientData)optarg);
Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'B':
compatMake = TRUE;
Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
break;
#ifdef REMOTE
case 'L':
maxLocal = strtol(optarg, &p, 0);
if (*p != '\0' || maxLocal < 1) {
(void) fprintf(stderr, "%s: illegal argument to -L -- must be positive integer!\n",
progname);
exit(1);
}
Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
#endif
case 'N':
noExecute = TRUE;
noRecursiveExecute = TRUE;
Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL);
break;
case 'P':
usePipes = FALSE;
Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL);
break;
case 'S':
keepgoing = FALSE;
Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
break;
case 'T':
tracefile = estrdup(optarg);
Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'W':
parseWarnFatal = TRUE;
break;
case 'X':
varNoExportEnv = TRUE;
Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL);
break;
case 'd': {
char *modules = optarg;
for (; *modules; ++modules)
switch (*modules) {
case 'A':
debug = ~0;
break;
case 'a':
debug |= DEBUG_ARCH;
break;
case 'c':
debug |= DEBUG_COND;
break;
case 'd':
debug |= DEBUG_DIR;
break;
case 'f':
debug |= DEBUG_FOR;
break;
case 'g':
if (modules[1] == '1') {
debug |= DEBUG_GRAPH1;
++modules;
}
else if (modules[1] == '2') {
debug |= DEBUG_GRAPH2;
++modules;
}
break;
case 'j':
debug |= DEBUG_JOB;
break;
case 'm':
debug |= DEBUG_MAKE;
break;
case 's':
debug |= DEBUG_SUFF;
break;
case 't':
debug |= DEBUG_TARG;
break;
case 'v':
debug |= DEBUG_VAR;
break;
case 'x':
debug |= DEBUG_SHELL;
break;
default:
(void)fprintf(stderr,
"%s: illegal argument to d option -- %c\n",
progname, *modules);
usage();
}
Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
}
case 'e':
checkEnvFirst = TRUE;
Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
break;
case 'f':
(void)Lst_AtEnd(makefiles, (ClientData)optarg);
break;
case 'i':
ignoreErrors = TRUE;
Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
break;
case 'j':
forceJobs = TRUE;
maxJobs = strtol(optarg, &p, 0);
if (*p != '\0' || maxJobs < 1) {
(void) fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n",
progname);
exit(1);
}
#ifndef REMOTE
maxLocal = maxJobs;
#endif
Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'k':
keepgoing = TRUE;
Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
break;
case 'm':
(void) Dir_AddDir(sysIncPath, optarg);
Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'n':
noExecute = TRUE;
Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
break;
case 'q':
queryFlag = TRUE;
/* Kind of nonsensical, wot? */
Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
break;
case 'r':
noBuiltins = TRUE;
Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
break;
case 's':
beSilent = TRUE;
Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
break;
case 't':
touchFlag = TRUE;
Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
break;
default:
case '?':
usage();
}
}
oldVars = TRUE;
/*
* See if the rest of the arguments are variable assignments and
* perform them if so. Else take them to be targets and stuff them
* on the end of the "create" list.
*/
for (argv += optind, argc -= optind; *argv; ++argv, --argc)
if (Parse_IsVar(*argv)) {
Parse_DoVar(*argv, VAR_CMD);
} else {
if (!**argv)
Punt("illegal (null) argument.");
if (**argv == '-') {
if ((*argv)[1])
optind = 0; /* -flag... */
else
optind = 1; /* - */
goto rearg;
}
(void)Lst_AtEnd(create, (ClientData)estrdup(*argv));
}
}
/*-
* Main_ParseArgLine --
* Used by the parse module when a .MFLAGS or .MAKEFLAGS target
* is encountered and by main() when reading the .MAKEFLAGS envariable.
* Takes a line of arguments and breaks it into its
* component words and passes those words and the number of them to the
* MainParseArgs function.
* The line should have all its leading whitespace removed.
*
* Input:
* line Line to fracture
*
* Results:
* None
*
* Side Effects:
* Only those that come from the various arguments.
*/
void
Main_ParseArgLine(char *line)
{
char **argv; /* Manufactured argument vector */
int argc; /* Number of arguments in argv */
char *args; /* Space used by the args */
char *buf, *p1;
char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1);
size_t len;
if (line == NULL)
return;
for (; *line == ' '; ++line)
continue;
if (!*line)
return;
buf = emalloc(len = strlen(line) + strlen(argv0) + 2);
(void)snprintf(buf, len, "%s %s", argv0, line);
if (p1)
free(p1);
argv = brk_string(buf, &argc, TRUE, &args);
free(buf);
MainParseArgs(argc, argv);
free(args);
free(argv);
}
Boolean
Main_SetObjdir(const char *path)
{
struct stat sb;
char *p = NULL;
char buf[MAXPATHLEN + 1];
Boolean rc = FALSE;
/* expand variable substitutions */
if (strchr(path, '$') != 0) {
snprintf(buf, MAXPATHLEN, "%s", path);
path = p = Var_Subst(NULL, buf, VAR_GLOBAL, 0);
}
if (path[0] != '/') {
snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path);
path = buf;
}
/* look for the directory and try to chdir there */
if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
if (chdir(path)) {
(void)fprintf(stderr, "make warning: %s: %s.\n",
path, strerror(errno));
} else {
strncpy(objdir, path, MAXPATHLEN);
Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0);
setenv("PWD", objdir, 1);
Dir_InitDot();
rc = TRUE;
}
}
if (p)
free(p);
return rc;
}
/*-
* main --
* The main function, for obvious reasons. Initializes variables
* and a few modules, then parses the arguments give it in the
* environment and on the command line. Reads the system makefile
* followed by either Makefile, makefile or the file given by the
* -f argument. Sets the .MAKEFLAGS PMake variable based on all the
* flags it has received by then uses either the Make or the Compat
* module to create the initial list of targets.
*
* Results:
* If -q was given, exits -1 if anything was out-of-date. Else it exits
* 0.
*
* Side Effects:
* The program exits when done. Targets are created. etc. etc. etc.
*/
int
main(int argc, char **argv)
{
Lst targs; /* target nodes to create -- passed to Make_Init */
Boolean outOfDate = TRUE; /* FALSE if all targets up to date */
struct stat sb, sa;
char *p1, *path, *pwd;
char mdpath[MAXPATHLEN];
char *machine = getenv("MACHINE");
const char *machine_arch = getenv("MACHINE_ARCH");
char *syspath = getenv("MAKESYSPATH");
Lst sysMkPath; /* Path of sys.mk */
char *cp = NULL, *start;
/* avoid faults on read-only strings */
static char defsyspath[] = _PATH_DEFSYSPATH;
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
#ifdef RLIMIT_NOFILE
/*
* get rid of resource limit on file descriptors
*/
{
struct rlimit rl;
if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
rl.rlim_cur != rl.rlim_max) {
rl.rlim_cur = rl.rlim_max;
(void) setrlimit(RLIMIT_NOFILE, &rl);
}
}
#endif
/*
* Find where we are and take care of PWD for the automounter...
* All this code is so that we know where we are when we start up
* on a different machine with pmake.
*/
if (getcwd(curdir, MAXPATHLEN) == NULL) {
(void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
exit(2);
}
if (stat(curdir, &sa) == -1) {
(void)fprintf(stderr, "%s: %s: %s.\n",
progname, curdir, strerror(errno));
exit(2);
}
/*
* Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
* since the value of curdir can very depending on how we got
* here. Ie sitting at a shell prompt (shell that provides $PWD)
* or via subdir.mk in which case its likely a shell which does
* not provide it.
* So, to stop it breaking this case only, we ignore PWD if
* MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform.
*/
if ((pwd = getenv("PWD")) != NULL && getenv("MAKEOBJDIRPREFIX") == NULL) {
const char *makeobjdir = getenv("MAKEOBJDIR");
if (makeobjdir == NULL || !strchr(makeobjdir, '$')) {
if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino &&
sa.st_dev == sb.st_dev)
(void) strncpy(curdir, pwd, MAXPATHLEN);
}
}
/*
* Get the name of this type of MACHINE from utsname
* so we can share an executable for similar machines.
* (i.e. m68k: amiga hp300, mac68k, sun3, ...)
*
* Note that both MACHINE and MACHINE_ARCH are decided at
* run-time.
*/
if (!machine) {
#ifndef MAKE_BOOTSTRAP
struct utsname utsname;
if (uname(&utsname) == -1) {
(void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
strerror(errno));
exit(2);
}
machine = utsname.machine;
#else
#ifdef MAKE_MACHINE
machine = MAKE_MACHINE;
#else
machine = "unknown";
#endif
#endif
}
if (!machine_arch) {
#ifndef MACHINE_ARCH
#ifdef MAKE_MACHINE_ARCH
machine_arch = MAKE_MACHINE_ARCH;
#else
machine_arch = "unknown";
#endif
#else
machine_arch = MACHINE_ARCH;
#endif
}
/*
* Just in case MAKEOBJDIR wants us to do something tricky.
*/
Var_Init(); /* Initialize the lists of variables for
* parsing arguments */
Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0);
Var_Set("MACHINE", machine, VAR_GLOBAL, 0);
Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0);
#ifdef MAKE_VERSION
Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0);
#endif
Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */
/*
* Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that,
* MAKEOBJDIR is set in the environment, try only that value
* and fall back to .CURDIR if it does not exist.
*
* Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and
* finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none
* of these paths exist, just use .CURDIR.
*/
Dir_Init(curdir);
(void) Main_SetObjdir(curdir);
if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) {
(void) snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir);
(void) Main_SetObjdir(mdpath);
} else if ((path = getenv("MAKEOBJDIR")) != NULL) {
(void) Main_SetObjdir(path);
} else {
(void) snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine);
if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) {
(void) snprintf(mdpath, MAXPATHLEN, "%s%s",
_PATH_OBJDIRPREFIX, curdir);
(void) Main_SetObjdir(mdpath);
}
}
create = Lst_Init(FALSE);
makefiles = Lst_Init(FALSE);
printVars = FALSE;
variables = Lst_Init(FALSE);
beSilent = FALSE; /* Print commands as executed */
ignoreErrors = FALSE; /* Pay attention to non-zero returns */
noExecute = FALSE; /* Execute all commands */
noRecursiveExecute = FALSE; /* Execute all .MAKE targets */
keepgoing = FALSE; /* Stop on error */
allPrecious = FALSE; /* Remove targets when interrupted */
queryFlag = FALSE; /* This is not just a check-run */
noBuiltins = FALSE; /* Read the built-in rules */
touchFlag = FALSE; /* Actually update targets */
usePipes = TRUE; /* Catch child output in pipes */
debug = 0; /* No debug verbosity, please. */
jobsRunning = FALSE;
maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */
#ifdef REMOTE
maxJobs = DEFMAXJOBS; /* Set default max concurrency */
#else
maxJobs = maxLocal;
#endif
compatMake = FALSE; /* No compat mode */
/*
* Initialize the parsing, directory and variable modules to prepare
* for the reading of inclusion paths and variable settings on the
* command line
*/
/*
* Initialize various variables.
* MAKE also gets this name, for compatibility
* .MAKEFLAGS gets set to the empty string just in case.
* MFLAGS also gets initialized empty, for compatibility.
*/
Parse_Init();
Var_Set("MAKE", argv[0], VAR_GLOBAL, 0);
Var_Set(".MAKE", argv[0], VAR_GLOBAL, 0);
Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0);
Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0);
Var_Set("MFLAGS", "", VAR_GLOBAL, 0);
Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0);
/*
* First snag any flags out of the MAKE environment variable.
* (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
* in a different format).
*/
#ifdef POSIX
Main_ParseArgLine(getenv("MAKEFLAGS"));
#else
Main_ParseArgLine(getenv("MAKE"));
#endif
MainParseArgs(argc, argv);
/*
* Be compatible if user did not specify -j and did not explicitly
* turned compatibility on
*/
if (!compatMake && !forceJobs) {
compatMake = TRUE;
}
/*
* Initialize archive, target and suffix modules in preparation for
* parsing the makefile(s)
*/
Arch_Init();
Targ_Init();
Suff_Init();
Trace_Init(tracefile);
DEFAULT = NILGNODE;
(void)time(&now);
Trace_Log(MAKESTART, NULL);
/*
* Set up the .TARGETS variable to contain the list of targets to be
* created. If none specified, make the variable empty -- the parser
* will fill the thing in with the default or .MAIN target.
*/
if (!Lst_IsEmpty(create)) {
LstNode ln;
for (ln = Lst_First(create); ln != NILLNODE;
ln = Lst_Succ(ln)) {
char *name = (char *)Lst_Datum(ln);
Var_Append(".TARGETS", name, VAR_GLOBAL);
}
} else
Var_Set(".TARGETS", "", VAR_GLOBAL, 0);
/*
* If no user-supplied system path was given (through the -m option)
* add the directories from the DEFSYSPATH (more than one may be given
* as dir1:...:dirn) to the system include path.
*/
if (syspath == NULL || *syspath == '\0')
syspath = defsyspath;
else
syspath = strdup(syspath);
for (start = syspath; *start != '\0'; start = cp) {
for (cp = start; *cp != '\0' && *cp != ':'; cp++)
continue;
if (*cp == '\0') {
(void) Dir_AddDir(defIncPath, start);
} else {
*cp++ = '\0';
(void) Dir_AddDir(defIncPath, start);
}
}
if (syspath != defsyspath)
free(syspath);
/*
* Read in the built-in rules first, followed by the specified
* makefile, if it was (makefile != (char *) NULL), or the default
* Makefile and makefile, in that order, if it wasn't.
*/
if (!noBuiltins) {
LstNode ln;
sysMkPath = Lst_Init (FALSE);
Dir_Expand(_PATH_DEFSYSMK,
Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath,
sysMkPath);
if (Lst_IsEmpty(sysMkPath))
Fatal("%s: no system rules (%s).", progname,
_PATH_DEFSYSMK);
ln = Lst_Find(sysMkPath, (ClientData)NULL, ReadMakefile);
if (ln != NILLNODE)
Fatal("%s: cannot open %s.", progname,
(char *)Lst_Datum(ln));
}
if (!Lst_IsEmpty(makefiles)) {
LstNode ln;
ln = Lst_Find(makefiles, (ClientData)NULL, ReadMakefile);
if (ln != NILLNODE)
Fatal("%s: cannot open %s.", progname,
(char *)Lst_Datum(ln));
} else if (!ReadMakefile(UNCONST("makefile"), NULL))
(void)ReadMakefile(UNCONST("Makefile"), NULL);
(void)ReadMakefile(UNCONST(".depend"), NULL);
Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
if (p1)
free(p1);
if (!jobServer && !compatMake)
Job_ServerStart(maxJobs);
if (DEBUG(JOB))
printf("job_pipe %d %d, maxjobs %d maxlocal %d compat %d\n", job_pipe[0], job_pipe[1], maxJobs,
maxLocal, compatMake);
Main_ExportMAKEFLAGS(TRUE); /* initial export */
Check_Cwd_av(0, NULL, 0); /* initialize it */
/*
* For compatibility, look at the directories in the VPATH variable
* and add them to the search path, if the variable is defined. The
* variable's value is in the same format as the PATH envariable, i.e.
* <directory>:<directory>:<directory>...
*/
if (Var_Exists("VPATH", VAR_CMD)) {
char *vpath, savec;
/*
* GCC stores string constants in read-only memory, but
* Var_Subst will want to write this thing, so store it
* in an array
*/
static char VPATH[] = "${VPATH}";
vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE);
path = vpath;
do {
/* skip to end of directory */
for (cp = path; *cp != ':' && *cp != '\0'; cp++)
continue;
/* Save terminator character so know when to stop */
savec = *cp;
*cp = '\0';
/* Add directory to search path */
(void) Dir_AddDir(dirSearchPath, path);
*cp = savec;
path = cp + 1;
} while (savec == ':');
(void)free((Address)vpath);
}
/*
* Now that all search paths have been read for suffixes et al, it's
* time to add the default search path to their lists...
*/
Suff_DoPaths();
/*
* Propagate attributes through :: dependency lists.
*/
Targ_Propagate();
/* print the initial graph, if the user requested it */
if (DEBUG(GRAPH1))
Targ_PrintGraph(1);
/* print the values of any variables requested by the user */
if (printVars) {
LstNode ln;
for (ln = Lst_First(variables); ln != NILLNODE;
ln = Lst_Succ(ln)) {
char *value = Var_Value((char *)Lst_Datum(ln),
VAR_GLOBAL, &p1);
printf("%s\n", value ? value : "");
if (p1)
free(p1);
}
}
/*
* Have now read the entire graph and need to make a list of targets
* to create. If none was given on the command line, we consult the
* parsing module to find the main target(s) to create.
*/
if (Lst_IsEmpty(create))
targs = Parse_MainName();
else
targs = Targ_FindList(create, TARG_CREATE);
if (!compatMake && !printVars) {
/*
* Initialize job module before traversing the graph, now that
* any .BEGIN and .END targets have been read. This is done
* only if the -q flag wasn't given (to prevent the .BEGIN from
* being executed should it exist).
*/
if (!queryFlag) {
if (maxLocal == -1)
maxLocal = maxJobs;
Job_Init(maxJobs, maxLocal);
jobsRunning = TRUE;
}
/* Traverse the graph, checking on all the targets */
outOfDate = Make_Run(targs);
} else if (!printVars) {
/*
* Compat_Init will take care of creating all the targets as
* well as initializing the module.
*/
Compat_Run(targs);
}
#ifdef CLEANUP
Lst_Destroy(targs, NOFREE);
Lst_Destroy(variables, NOFREE);
Lst_Destroy(makefiles, NOFREE);
Lst_Destroy(create, (void (*)(ClientData))) free;
#endif
/* print the graph now it's been processed if the user requested it */
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
Trace_Log(MAKEEND, 0);
Suff_End();
Targ_End();
Arch_End();
Var_End();
Parse_End();
Dir_End();
Job_End();
Trace_End();
if (queryFlag && outOfDate)
return(1);
else
return(0);
}
/*-
* ReadMakefile --
* Open and parse the given makefile.
*
* Results:
* TRUE if ok. FALSE if couldn't open file.
*
* Side Effects:
* lots
*/
static Boolean
ReadMakefile(ClientData p, ClientData q)
{
char *fname = p; /* makefile to read */
FILE *stream;
size_t len = MAXPATHLEN;
char *name, *path = emalloc(len);
int setMAKEFILE;
if (!strcmp(fname, "-")) {
Parse_File("(stdin)", stdin);
Var_Set("MAKEFILE", "", VAR_GLOBAL, 0);
} else {
setMAKEFILE = strcmp(fname, ".depend");
/* if we've chdir'd, rebuild the path name */
if (strcmp(curdir, objdir) && *fname != '/') {
size_t plen = strlen(curdir) + strlen(fname) + 2;
if (len < plen)
path = erealloc(path, len = 2 * plen);
(void)snprintf(path, len, "%s/%s", curdir, fname);
if ((stream = fopen(path, "r")) != NULL) {
fname = path;
goto found;
}
} else if ((stream = fopen(fname, "r")) != NULL)
goto found;
/* look in -I and system include directories. */
name = Dir_FindFile(fname, parseIncPath);
if (!name)
name = Dir_FindFile(fname,
Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
if (!name || !(stream = fopen(name, "r"))) {
free(path);
return(FALSE);
}
fname = name;
/*
* set the MAKEFILE variable desired by System V fans -- the
* placement of the setting here means it gets set to the last
* makefile specified, as it is set by SysV make.
*/
found:
if (setMAKEFILE)
Var_Set("MAKEFILE", fname, VAR_GLOBAL, 0);
Parse_File(fname, stream);
(void)fclose(stream);
}
free(path);
return(TRUE);
}
/*
* If MAKEOBJDIRPREFIX is in use, make ends up not in .CURDIR
* in situations that would not arrise with ./obj (links or not).
* This tends to break things like:
*
* build:
* ${MAKE} includes
*
* This function spots when ${.MAKE:T} or ${.MAKE} is a command (as
* opposed to an argument) in a command line and if so returns
* ${.CURDIR} so caller can chdir() so that the assumptions made by
* the Makefile hold true.
*
* If ${.MAKE} does not contain any '/', then ${.MAKE:T} is skipped.
*
* The chdir() only happens in the child process, and does nothing if
* MAKEOBJDIRPREFIX and MAKEOBJDIR are not in the environment so it
* should not break anything. Also if NOCHECKMAKECHDIR is set we
* do nothing - to ensure historic semantics can be retained.
*/
static int Check_Cwd_Off = 0;
static char *
Check_Cwd_av(int ac, char **av, int copy)
{
static char *make[4];
static char *cur_dir = NULL;
char **mp;
char *cp;
int is_cmd, next_cmd;
int i;
int n;
if (Check_Cwd_Off)
return NULL;
if (make[0] == NULL) {
if (Var_Exists("NOCHECKMAKECHDIR", VAR_GLOBAL)) {
Check_Cwd_Off = 1;
return NULL;
}
make[1] = Var_Value(".MAKE", VAR_GLOBAL, &cp);
if ((make[0] = strrchr(make[1], '/')) == NULL) {
make[0] = make[1];
make[1] = NULL;
} else
++make[0];
make[2] = NULL;
cur_dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp);
}
if (ac == 0 || av == NULL)
return NULL; /* initialization only */
if (getenv("MAKEOBJDIR") == NULL &&
getenv("MAKEOBJDIRPREFIX") == NULL)
return NULL;
next_cmd = 1;
for (i = 0; i < ac; ++i) {
is_cmd = next_cmd;
n = strlen(av[i]);
cp = &(av[i])[n - 1];
if (strspn(av[i], "|&;") == n) {
next_cmd = 1;
continue;
} else if (*cp == ';' || *cp == '&' || *cp == '|' || *cp == ')') {
next_cmd = 1;
if (copy) {
do {
*cp-- = '\0';
} while (*cp == ';' || *cp == '&' || *cp == '|' ||
*cp == ')' || *cp == '}') ;
} else {
/*
* XXX this should not happen.
*/
fprintf(stderr, "WARNING: raw arg ends in shell meta '%s'\n",
av[i]);
}
} else
next_cmd = 0;
cp = av[i];
if (*cp == ';' || *cp == '&' || *cp == '|')
is_cmd = 1;
#ifdef check_cwd_debug
fprintf(stderr, "av[%d] == %s '%s'",
i, (is_cmd) ? "cmd" : "arg", av[i]);
#endif
if (is_cmd != 0) {
if (*cp == '(' || *cp == '{' ||
*cp == ';' || *cp == '&' || *cp == '|') {
do {
++cp;
} while (*cp == '(' || *cp == '{' ||
*cp == ';' || *cp == '&' || *cp == '|');
if (*cp == '\0') {
next_cmd = 1;
continue;
}
}
if (strcmp(cp, "cd") == 0 || strcmp(cp, "chdir") == 0) {
#ifdef check_cwd_debug
fprintf(stderr, " == cd, done.\n");
#endif
return NULL;
}
for (mp = make; *mp != NULL; ++mp) {
n = strlen(*mp);
if (strcmp(cp, *mp) == 0) {
#ifdef check_cwd_debug
fprintf(stderr, " %s == '%s', chdir(%s)\n",
cp, *mp, cur_dir);
#endif
return cur_dir;
}
}
}
#ifdef check_cwd_debug
fprintf(stderr, "\n");
#endif
}
return NULL;
}
char *
Check_Cwd_Cmd(const char *cmd)
{
char *cp, *bp;
char **av;
int ac;
if (Check_Cwd_Off)
return NULL;
if (cmd) {
av = brk_string(cmd, &ac, TRUE, &bp);
#ifdef check_cwd_debug
fprintf(stderr, "splitting: '%s' -> %d words\n",
cmd, ac);
#endif
} else {
ac = 0;
av = NULL;
bp = NULL;
}
cp = Check_Cwd_av(ac, av, 1);
if (bp) {
free(av);
free(bp);
}
return cp;
}
void
Check_Cwd(const char **argv)
{
char *cp;
int ac;
if (Check_Cwd_Off)
return;
for (ac = 0; argv[ac] != NULL; ++ac)
/* NOTHING */;
if (ac == 3 && *argv[1] == '-') {
cp = Check_Cwd_Cmd(argv[2]);
} else {
cp = Check_Cwd_av(ac, UNCONST(argv), 0);
}
if (cp) {
chdir(cp);
}
}
/*-
* Cmd_Exec --
* Execute the command in cmd, and return the output of that command
* in a string.
*
* Results:
* A string containing the output of the command, or the empty string
* If err is not NULL, it contains the reason for the command failure
*
* Side Effects:
* The string must be freed by the caller.
*/
char *
Cmd_Exec(const char *cmd, const char **err)
{
const char *args[4]; /* Args for invoking the shell */
int fds[2]; /* Pipe streams */
int cpid; /* Child PID */
int pid; /* PID from wait() */
char *res; /* result */
int status; /* command exit status */
Buffer buf; /* buffer to store the result */
char *cp;
int cc;
*err = NULL;
if (!shellName)
Shell_Init();
/*
* Set up arguments for shell
*/
args[0] = shellName;
args[1] = "-c";
args[2] = cmd;
args[3] = NULL;
/*
* Open a pipe for fetching its output
*/
if (pipe(fds) == -1) {
*err = "Couldn't create pipe for \"%s\"";
goto bad;
}
/*
* Fork
*/
switch (cpid = vfork()) {
case 0:
/*
* Close input side of pipe
*/
(void) close(fds[0]);
/*
* Duplicate the output stream to the shell's output, then
* shut the extra thing down. Note we don't fetch the error
* stream...why not? Why?
*/
(void) dup2(fds[1], 1);
(void) close(fds[1]);
(void) execv(shellPath, UNCONST(args));
_exit(1);
/*NOTREACHED*/
case -1:
*err = "Couldn't exec \"%s\"";
goto bad;
default:
/*
* No need for the writing half
*/
(void) close(fds[1]);
buf = Buf_Init (MAKE_BSIZE);
do {
char result[BUFSIZ];
cc = read(fds[0], result, sizeof(result));
if (cc > 0)
Buf_AddBytes(buf, cc, (Byte *) result);
}
while (cc > 0 || (cc == -1 && errno == EINTR));
/*
* Close the input side of the pipe.
*/
(void) close(fds[0]);
/*
* Wait for the process to exit.
*/
while(((pid = wait(&status)) != cpid) && (pid >= 0))
continue;
res = (char *)Buf_GetAll (buf, &cc);
Buf_Destroy (buf, FALSE);
if (cc == 0)
*err = "Couldn't read shell's output for \"%s\"";
if (status)
*err = "\"%s\" returned non-zero status";
/*
* Null-terminate the result, convert newlines to spaces and
* install it in the variable.
*/
res[cc] = '\0';
cp = &res[cc];
if (cc > 0 && *--cp == '\n') {
/*
* A final newline is just stripped
*/
*cp-- = '\0';
}
while (cp >= res) {
if (*cp == '\n') {
*cp = ' ';
}
cp--;
}
break;
}
return res;
bad:
res = emalloc(1);
*res = '\0';
return res;
}
/*-
* Error --
* Print an error message given its format.
*
* Results:
* None.
*
* Side Effects:
* The message is printed.
*/
/* VARARGS */
void
Error(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s: ", progname);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
}
/*-
* Fatal --
* Produce a Fatal error message. If jobs are running, waits for them
* to finish.
*
* Results:
* None
*
* Side Effects:
* The program exits
*/
/* VARARGS */
void
Fatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (jobsRunning)
Job_Wait();
Job_TokenFlush();
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
PrintOnError(NULL);
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
Trace_Log(MAKEERROR, 0);
exit(2); /* Not 1 so -q can distinguish error */
}
/*
* Punt --
* Major exception once jobs are being created. Kills all jobs, prints
* a message and exits.
*
* Results:
* None
*
* Side Effects:
* All children are killed indiscriminately and the program Lib_Exits
*/
/* VARARGS */
void
Punt(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void)fprintf(stderr, "%s: ", progname);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
PrintOnError(NULL);
DieHorribly();
}
/*-
* DieHorribly --
* Exit without giving a message.
*
* Results:
* None
*
* Side Effects:
* A big one...
*/
void
DieHorribly(void)
{
if (jobsRunning)
Job_AbortAll();
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
Trace_Log(MAKEERROR, 0);
exit(2); /* Not 1, so -q can distinguish error */
}
/*
* Finish --
* Called when aborting due to errors in child shell to signal
* abnormal exit.
*
* Results:
* None
*
* Side Effects:
* The program exits
*/
void
Finish(int errors)
/* number of errors encountered in Make_Make */
{
Fatal("%d error%s", errors, errors == 1 ? "" : "s");
}
/*
* emalloc --
* malloc, but die on error.
*/
void *
emalloc(size_t len)
{
void *p;
if ((p = malloc(len)) == NULL)
enomem();
return(p);
}
/*
* estrdup --
* strdup, but die on error.
*/
char *
estrdup(const char *str)
{
char *p;
if ((p = strdup(str)) == NULL)
enomem();
return(p);
}
/*
* erealloc --
* realloc, but die on error.
*/
void *
erealloc(void *ptr, size_t size)
{
if ((ptr = realloc(ptr, size)) == NULL)
enomem();
return(ptr);
}
/*
* enomem --
* die when out of memory.
*/
void
enomem(void)
{
(void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
exit(2);
}
/*
* enunlink --
* Remove a file carefully, avoiding directories.
*/
int
eunlink(const char *file)
{
struct stat st;
if (lstat(file, &st) == -1)
return -1;
if (S_ISDIR(st.st_mode)) {
errno = EISDIR;
return -1;
}
return unlink(file);
}
/*
* execError --
* Print why exec failed, avoiding stdio.
*/
void
execError(const char *af, const char *av)
{
#ifdef USE_IOVEC
int i = 0;
struct iovec iov[8];
#define IOADD(s) \
(void)(iov[i].iov_base = UNCONST(s), \
iov[i].iov_len = strlen(iov[i].iov_base), \
i++)
#else
#define IOADD (void)write(2, s, strlen(s))
#endif
IOADD(progname);
IOADD(": ");
IOADD(af);
IOADD("(");
IOADD(av);
IOADD(") failed (");
IOADD(strerror(errno));
IOADD(")\n");
#ifdef USE_IOVEC
(void)writev(2, iov, 8);
#endif
}
/*
* usage --
* exit with usage message
*/
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-Beiknqrst] [-D variable] [-d flags] [-f makefile]\n\
[-I directory] [-j max_jobs] [-m directory] [-V variable]\n\
[variable=value] [target ...]\n", progname);
exit(2);
}
int
PrintAddr(ClientData a, ClientData b)
{
printf("%lx ", (unsigned long) a);
return b ? 0 : 0;
}
void
PrintOnError(const char *s)
{
char tmp[64];
if (s)
printf("%s", s);
printf("\n%s: stopped in %s\n", progname, curdir);
strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
sizeof(tmp) - 1);
s = Var_Subst(NULL, tmp, VAR_GLOBAL, 0);
if (s && *s)
printf("%s", s);
}
void
Main_ExportMAKEFLAGS(Boolean first)
{
static int once = 1;
char tmp[64];
char *s;
if (once != first)
return;
once = 0;
strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
sizeof(tmp));
s = Var_Subst(NULL, tmp, VAR_CMD, 0);
if (s && *s) {
#ifdef POSIX
setenv("MAKEFLAGS", s, 1);
#else
setenv("MAKE", s, 1);
#endif
}
}
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