File: [local] / src / usr.bin / make / main.c (download)
Revision 1.61, Mon Apr 21 23:14:06 2003 UTC (21 years, 1 month ago) by millert
Branch: MAIN
Changes since 1.60: +15 -7 lines
Stop parsing arguments when we hit "--".
|
/* $OpenPackages$ */
/* $OpenBSD: main.c,v 1.61 2003/04/21 23:14:06 millert Exp $ */
/* $NetBSD: main.c,v 1.34 1997/03/24 20:56:36 gwr Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* 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.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifndef MAKE_BOOTSTRAP
#include <sys/utsname.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "config.h"
#include "defines.h"
#include "var.h"
#include "parse.h"
#include "parsevar.h"
#include "dir.h"
#include "error.h"
#include "pathnames.h"
#include "init.h"
#include "job.h"
#include "compat.h"
#include "targ.h"
#include "suff.h"
#include "str.h"
#include "main.h"
#include "lst.h"
#include "memory.h"
#include "make.h"
#ifndef PATH_MAX
# ifdef MAXPATHLEN
# define PATH_MAX (MAXPATHLEN+1)
# else
# define PATH_MAX 1024
# endif
#endif
#ifndef DEFMAXLOCAL
#define DEFMAXLOCAL DEFMAXJOBS
#endif /* DEFMAXLOCAL */
#define MAKEFLAGS ".MAKEFLAGS"
static LIST to_create; /* Targets to be made */
Lst create = &to_create;
GNode *DEFAULT; /* .DEFAULT node */
bool allPrecious; /* .PRECIOUS given on line by itself */
static bool noBuiltins; /* -r flag */
static LIST makefiles; /* ordered list of makefiles to read */
static LIST varstoprint; /* list of variables to print */
int maxJobs; /* -j argument */
static int maxLocal; /* -L argument */
bool compatMake; /* -B argument */
bool debug; /* -d flag */
bool noExecute; /* -n flag */
bool keepgoing; /* -k flag */
bool queryFlag; /* -q flag */
bool touchFlag; /* -t flag */
bool usePipes; /* !-P flag */
bool ignoreErrors; /* -i flag */
bool beSilent; /* -s flag */
bool oldVars; /* variable substitution style */
bool checkEnvFirst; /* -e flag */
static void MainParseArgs(int, char **);
static char * chdir_verify_path(char *);
static int ReadMakefile(void *, void *);
static void add_dirpath(Lst, const char *);
static void usage(void);
static void posixParseOptLetter(int);
static void record_option(int, const char *);
static char *curdir; /* startup directory */
static char *objdir; /* where we chdir'ed to */
static void record_option(c, arg)
int c;
const char *arg;
{
char opt[3];
opt[0] = '-';
opt[1] = c;
opt[2] = '\0';
Var_Append(MAKEFLAGS, opt, VAR_GLOBAL);
if (arg != NULL)
Var_Append(MAKEFLAGS, arg, VAR_GLOBAL);
}
static void
posixParseOptLetter(c)
int c;
{
switch(c) {
case 'B':
compatMake = true;
return; /* XXX don't pass to submakes. */
case 'P':
usePipes = false;
break;
case 'S':
keepgoing = false;
break;
case 'e':
checkEnvFirst = true;
break;
case 'i':
ignoreErrors = true;
break;
case 'k':
keepgoing = true;
break;
case 'n':
noExecute = true;
break;
case 'q':
queryFlag = true;
/* Kind of nonsensical, wot? */
break;
case 'r':
noBuiltins = true;
break;
case 's':
beSilent = true;
break;
case 't':
touchFlag = true;
break;
default:
case '?':
usage();
}
record_option(c, NULL);
}
/*-
* 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
*
* Side Effects:
* Various global and local flags will be set depending on the flags
* given
*/
static void
MainParseArgs(argc, argv)
int argc;
char **argv;
{
int c, optend;
int forceJobs = 0;
#define OPTFLAGS "BD:I:PSV:d:ef:ij:km:nqrst"
#define OPTLETTERS "BPSiknqrst"
optind = 1; /* since we're called more than once */
optreset = 1;
optend = 0;
while (optind < argc) {
if (!optend && argv[optind][0] == '-') {
if (argv[optind][1] == '\0')
optind++; /* ignore "-" */
else if (argv[optind][1] == '-' &&
argv[optind][2] == '\0') {
optind++; /* ignore "--" */
optend++; /* "--" denotes end of flags */
}
}
c = optend ? -1 : getopt(argc, argv, OPTFLAGS);
switch (c) {
case 'D':
Var_Set(optarg, "1", VAR_GLOBAL);
record_option(c, optarg);
break;
case 'I':
Parse_AddIncludeDir(optarg);
record_option(c, optarg);
break;
case 'V':
Lst_AtEnd(&varstoprint, optarg);
record_option(c, optarg);
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 'l':
debug |= DEBUG_LOUD;
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;
default:
(void)fprintf(stderr,
"make: illegal argument to d option -- %c\n",
*modules);
usage();
}
record_option(c, optarg);
break;
}
case 'f':
Lst_AtEnd(&makefiles, optarg);
break;
case 'j': {
char *endptr;
forceJobs = true;
maxJobs = strtol(optarg, &endptr, 0);
if (endptr == optarg) {
fprintf(stderr,
"make: illegal argument to -j option -- %s -- not a number\n",
optarg);
usage();
}
maxJobs = atoi(optarg);
maxLocal = maxJobs;
record_option(c, optarg);
break;
}
case 'm':
Dir_AddDir(sysIncPath, optarg);
record_option(c, optarg);
break;
case -1:
/* Check for variable assignments and targets. */
if (argv[optind] != NULL &&
!Parse_DoVar(argv[optind], VAR_CMD)) {
if (!*argv[optind])
Punt("illegal (null) argument.");
Lst_AtEnd(create, estrdup(argv[optind]));
}
optind++; /* skip over non-option */
break;
default:
posixParseOptLetter(c);
}
}
/*
* Be compatible if user did not specify -j and did not explicitly
* turn compatibility on
*/
if (!compatMake && !forceJobs)
compatMake = true;
oldVars = true;
}
/*-
* 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.
*
* Side Effects:
* Only those that come from the various arguments.
*/
void
Main_ParseArgLine(line)
const char *line; /* Line to fracture */
{
char **argv; /* Manufactured argument vector */
int argc; /* Number of arguments in argv */
char *args; /* Space used by the args */
char *buf;
char *argv0;
const char *s;
size_t len;
if (line == NULL)
return;
for (; *line == ' '; ++line)
continue;
if (!*line)
return;
/* POSIX rule: MAKEFLAGS can hold a set of option letters without
* any blanks or dashes. */
for (s = line;; s++) {
if (*s == '\0') {
while (line != s)
posixParseOptLetter(*line++);
return;
}
if (strchr(OPTLETTERS, *s) == NULL)
break;
}
argv0 = Var_Value(".MAKE");
len = strlen(line) + strlen(argv0) + 2;
buf = emalloc(len);
(void)snprintf(buf, len, "%s %s", argv0, line);
argv = brk_string(buf, &argc, &args);
free(buf);
MainParseArgs(argc, argv);
free(args);
free(argv);
}
char *
chdir_verify_path(path)
char *path;
{
struct stat sb;
if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
if (chdir(path)) {
(void)fprintf(stderr, "make warning: %s: %s.\n",
path, strerror(errno));
return NULL;
} else {
if (path[0] != '/')
return Str_concat(curdir, path, '/');
else
return estrdup(path);
}
}
return NULL;
}
/* Add a :-separated path to a Lst of directories. */
static void
add_dirpath(l, n)
Lst l;
const char *n;
{
const char *start;
const char *cp;
for (start = n;;) {
for (cp = start; *cp != '\0' && *cp != ':';)
cp++;
Dir_AddDiri(l, start, cp);
if (*cp == '\0')
break;
else
start= cp+1;
}
}
int main(int, char **);
/*-
* 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(argc, argv)
int argc;
char **argv;
{
static LIST targs; /* target nodes to create */
bool outOfDate = true; /* false if all targets up to date */
struct stat sb, sa;
char *p, *path, *pathp, *pwd;
char *mdpath;
char *machine = getenv("MACHINE");
char *machine_arch = getenv("MACHINE_ARCH");
const char *syspath = _PATH_DEFSYSPATH;
#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 ((curdir = dogetcwd()) == NULL) {
(void)fprintf(stderr, "make: %s.\n", strerror(errno));
exit(2);
}
if (stat(curdir, &sa) == -1) {
(void)fprintf(stderr, "make: %s: %s.\n",
curdir, strerror(errno));
exit(2);
}
if ((pwd = getenv("PWD")) != NULL) {
if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino &&
sa.st_dev == sb.st_dev) {
free(curdir);
curdir = estrdup(pwd);
}
}
/*
* 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) {
perror("make: uname");
exit(2);
}
machine = utsname.machine;
#else
machine = MACHINE;
#endif
}
if (!machine_arch) {
#ifndef MACHINE_ARCH
machine_arch = "unknown"; /* XXX: no uname -p yet */
#else
machine_arch = MACHINE_ARCH;
#endif
}
/*
* If the MAKEOBJDIR (or by default, the _PATH_OBJDIR) directory
* exists, change into it and build there. (If a .${MACHINE} suffix
* exists, use that directory instead).
* Otherwise check MAKEOBJDIRPREFIX`cwd` (or by default,
* _PATH_OBJDIRPREFIX`cwd`) and build there if it exists.
* If all fails, use the current directory to build.
*
* Once things are initted,
* have to add the original directory to the search path,
* and modify the paths for the Makefiles apropriately. The
* current directory is also placed as a variable for make scripts.
*/
mdpath = NULL;
if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
if (!(path = getenv("MAKEOBJDIR"))) {
path = _PATH_OBJDIR;
pathp = _PATH_OBJDIRPREFIX;
mdpath = Str_concat(path, machine, '.');
if (!(objdir = chdir_verify_path(mdpath)))
if (!(objdir=chdir_verify_path(path))) {
free(mdpath);
mdpath = Str_concat(pathp, curdir, 0);
if (!(objdir=chdir_verify_path(mdpath)))
objdir = curdir;
}
}
else if (!(objdir = chdir_verify_path(path)))
objdir = curdir;
}
else {
mdpath = Str_concat(pathp, curdir, 0);
if (!(objdir = chdir_verify_path(mdpath)))
objdir = curdir;
}
free(mdpath);
esetenv("PWD", objdir);
unsetenv("CDPATH");
Static_Lst_Init(create);
Static_Lst_Init(&makefiles);
Static_Lst_Init(&varstoprint);
Static_Lst_Init(&targs);
beSilent = false; /* Print commands as executed */
ignoreErrors = false; /* Pay attention to non-zero returns */
noExecute = false; /* Execute all commands */
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. */
maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */
maxJobs = maxLocal;
compatMake = false; /* No compat mode */
/*
* Initialize all external modules.
*/
Init();
if (objdir != curdir)
Dir_AddDir(dirSearchPath, curdir);
Var_Set(".CURDIR", curdir, VAR_GLOBAL);
Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
/*
* 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.
*/
Var_Set("MAKE", argv[0], VAR_GLOBAL);
Var_Set(".MAKE", argv[0], VAR_GLOBAL);
Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
Var_Set("MFLAGS", "", VAR_GLOBAL);
Var_Set("MACHINE", machine, VAR_GLOBAL);
Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
/*
* First snag any flags out of the MAKEFLAGS environment variable.
*/
Main_ParseArgLine(getenv("MAKEFLAGS"));
MainParseArgs(argc, argv);
/* And set up everything for sub-makes */
Var_AddCmdline(MAKEFLAGS);
DEFAULT = 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 != NULL; ln = Lst_Adv(ln)) {
char *name = (char *)Lst_Datum(ln);
Var_Append(".TARGETS", name, VAR_GLOBAL);
}
} else
Var_Set(".TARGETS", "", VAR_GLOBAL);
/*
* 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 (Lst_IsEmpty(sysIncPath))
add_dirpath(sysIncPath, syspath);
/*
* Read in the built-in rules first, followed by the specified
* makefile(s), or the default BSDmakefile, Makefile or
* makefile, in that order.
*/
if (!noBuiltins) {
LstNode ln;
LIST sysMkPath; /* Path of sys.mk */
Lst_Init(&sysMkPath);
Dir_Expand(_PATH_DEFSYSMK, sysIncPath, &sysMkPath);
if (Lst_IsEmpty(&sysMkPath))
Fatal("make: no system rules (%s).", _PATH_DEFSYSMK);
ln = Lst_Find(&sysMkPath, ReadMakefile, NULL);
if (ln != NULL)
Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
#ifdef CLEANUP
Lst_Destroy(&sysMkPath, (SimpleProc)free);
#endif
}
if (!Lst_IsEmpty(&makefiles)) {
LstNode ln;
ln = Lst_Find(&makefiles, ReadMakefile, NULL);
if (ln != NULL)
Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
} else if (!ReadMakefile("BSDmakefile", NULL))
if (!ReadMakefile("makefile", NULL))
(void)ReadMakefile("Makefile", NULL);
/* Always read a .depend file, if it exists. */
(void)ReadMakefile(".depend", NULL);
Var_Append("MFLAGS", Var_Value(MAKEFLAGS),
VAR_GLOBAL);
/* Install all the flags into the MAKEFLAGS env variable. */
if (((p = Var_Value(MAKEFLAGS)) != NULL) && *p)
esetenv("MAKEFLAGS", p);
/*
* 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_Value("VPATH") != NULL) {
char *vpath;
vpath = Var_Subst("${VPATH}", NULL, false);
add_dirpath(dirSearchPath, vpath);
(void)free(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();
/* 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 (!Lst_IsEmpty(&varstoprint)) {
LstNode ln;
for (ln = Lst_First(&varstoprint); ln != NULL; ln = Lst_Adv(ln)) {
char *value = Var_Value((char *)Lst_Datum(ln));
printf("%s\n", value ? value : "");
}
} else {
/* 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))
Parse_MainName(&targs);
else
Targ_FindList(&targs, create);
if (compatMake)
/* Compat_Init will take care of creating all the targets as
* well as initializing the module. */
Compat_Run(&targs);
else {
/* 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);
}
/* Traverse the graph, checking on all the targets. */
outOfDate = Make_Run(&targs);
}
}
#ifdef CLEANUP
Lst_Destroy(&targs, NOFREE);
Lst_Destroy(&varstoprint, NOFREE);
Lst_Destroy(&makefiles, NOFREE);
Lst_Destroy(create, (SimpleProc)free);
#endif
/* print the graph now it's been processed if the user requested it */
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
#ifdef CLEANUP
if (objdir != curdir)
free(objdir);
free(curdir);
#endif
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 bool
ReadMakefile(p, q)
void * p;
void * q UNUSED;
{
char *fname = p; /* makefile to read */
FILE *stream;
char *name;
if (!strcmp(fname, "-")) {
Var_Set("MAKEFILE", "", VAR_GLOBAL);
Parse_File(estrdup("(stdin)"), stdin);
} else {
if ((stream = fopen(fname, "r")) != NULL)
goto found;
/* if we've chdir'd, rebuild the path name */
if (curdir != objdir && *fname != '/') {
char *path;
path = Str_concat(curdir, fname, '/');
if ((stream = fopen(path, "r")) == NULL)
free(path);
else {
fname = path;
goto found;
}
}
/* look in -I and system include directories. */
name = Dir_FindFile(fname, parseIncPath);
if (!name)
name = Dir_FindFile(fname, sysIncPath);
if (!name || !(stream = fopen(name, "r")))
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: Var_Set("MAKEFILE", fname, VAR_GLOBAL);
Parse_File(fname, stream);
}
return true;
}
/*
* usage --
* exit with usage message
*/
static void
usage()
{
(void)fprintf(stderr,
"usage: make [-Beiknqrst] [-D variable] [-d flags] [-f makefile ]\n\
[-I directory] [-j max_jobs] [-m directory] [-V variable]\n\
[variable=value] [target ...]\n");
exit(2);
}