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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/config/main.c	Lines:	0	306	0.0 %
Date:	2017-11-07	Branches:	0	248	0.0 %


/*	$OpenBSD: main.c,v 1.59 2017/06/22 15:57:16 deraadt Exp $	*/
/*	$NetBSD: main.c,v 1.22 1997/02/02 21:12:33 thorpej Exp $	*/

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * 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, Lawrence Berkeley Laboratories.
 *
 * 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.
 *
 *	from: @(#)main.c	8.1 (Berkeley) 6/6/93
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "config.h"

int	firstfile(const char *);
int	yyparse(void);

static struct hashtab *mkopttab;
static struct nvlist **nextopt;
static struct nvlist **nextdefopt;
static struct nvlist **nextmkopt;

static __dead void stop(void);
static int do_option(struct hashtab *, struct nvlist ***,
    const char *, const char *, const char *);
static int crosscheck(void);
static int badstar(void);
static int mksymlinks(void);
static int hasparent(struct devi *);
static int cfcrosscheck(struct config *, const char *, struct nvlist *);
static void optiondelta(void);

int	verbose;

__dead void
usage(void)
{
	extern char *__progname;

	fprintf(stderr,
		"usage: %s [-p] [-b builddir] [-s srcdir] [config-file]\n"
		"       %s [-u] [-f | -o outfile] -e infile\n",
		__progname, __progname);

	exit(1);
}

int pflag = 0;
char *sflag = NULL;
char *bflag = NULL;
char *startdir;

int
main(int argc, char *argv[])
{
	char *p;
	char *outfile = NULL;
	int ch, eflag, uflag, fflag;
	char dirbuffer[PATH_MAX];

	if (pledge("stdio rpath wpath cpath flock proc exec", NULL) == -1)
		err(1, "pledge");

	pflag = eflag = uflag = fflag = 0;
	while ((ch = getopt(argc, argv, "epfb:s:o:u")) != -1) {
		switch (ch) {

		case 'o':
			outfile = optarg;
			break;
		case 'u':
			uflag = 1;
			break;
		case 'f':
			fflag = 1;
			break;

		case 'e':
			eflag = 1;
			if (!isatty(STDIN_FILENO))
				verbose = 1;
			break;

		case 'p':
			/*
			 * Essentially the same as makeoptions PROF="-pg",
			 * but also changes the path from ../../compile/FOO
			 * to ../../compile/FOO.PROF; i.e., compile a
			 * profiling kernel based on a typical "regular"
			 * kernel.
			 *
			 * Note that if you always want profiling, you
			 * can (and should) use a "makeoptions" line.
			 */
			pflag = 1;
			break;

		case 'b':
			bflag = optarg;
			builddir = optarg;
			break;

		case 's':
			sflag = optarg;
			srcdir = optarg;
			break;

		default:
			usage();
		}
	}

	argc -= optind;
	argv += optind;
	if (argc > 1 || (eflag && argv[0] == NULL))
		usage();
	if (bflag) {
		startdir = getcwd(dirbuffer, sizeof dirbuffer);
		if (startdir == NULL)
			warn("Use of -b and can't getcwd, no make config");
	} else {
		startdir = "../../conf";
	}

	if (eflag) {
#ifdef MAKE_BOOTSTRAP
		errx(1, "UKC not available in this binary");
#else
		return (ukc(argv[0], outfile, uflag, fflag));
#endif
	}

	conffile = (argc == 1) ? argv[0] : "CONFIG";
	if (firstfile(conffile))
		err(2, "cannot read %s", conffile);

	/*
	 * Init variables.
	 */
	minmaxusers = 1;
	maxmaxusers = 10000;
	initintern();
	initfiles();
	initsem();
	devbasetab = ht_new();
	devatab = ht_new();
	selecttab = ht_new();
	needcnttab = ht_new();
	opttab = ht_new();
	mkopttab = ht_new();
	defopttab = ht_new();
	nextopt = &options;
	nextmkopt = &mkoptions;
	nextdefopt = &defoptions;

	/*
	 * Handle profiling (must do this before we try to create any
	 * files).
	 */
	last_component = strrchr(conffile, '/');
	last_component = (last_component) ? last_component + 1 : conffile;
	if (pflag) {
		if (asprintf(&p, "../compile/%s.PROF", last_component) == -1)
			err(1, NULL);
		(void)addmkoption(intern("PROF"), "-pg");
		(void)addoption(intern("GPROF"), NULL);
	} else {
		if (asprintf(&p, "../compile/%s", last_component) == -1)
			err(1, NULL);
	}
	defbuilddir = (argc == 0) ? "." : p;

	/*
	 * Parse config file (including machine definitions).
	 */
	if (yyparse())
		stop();

	/*
	 * Fix (as in `set firmly in place') files.
	 */
	if (fixfiles())
		stop();

	/*
	 * Fix objects and libraries.
	 */
	if (fixobjects())
		stop();

	/*
	 * Perform cross-checking.
	 */
	if (maxusers == 0) {
		if (defmaxusers) {
			(void)printf("maxusers not specified; %d assumed\n",
			    defmaxusers);
			maxusers = defmaxusers;
		} else {
			warnx("need \"maxusers\" line");
			errors++;
		}
	}
	if (crosscheck() || errors)
		stop();

	/*
	 * Squeeze things down and finish cross-checks (STAR checks must
	 * run after packing).
	 */
	pack();
	if (badstar())
		stop();

	/*
	 * Ready to go.  Build all the various files.
	 */
	if (mksymlinks() || mkmakefile() || mkheaders() || mkswap() ||
	    mkioconf())
		stop();
	optiondelta();
	return (0);
}

static int
mksymlink(const char *value, const char *path)
{
	int ret = 0;

	if (remove(path) && errno != ENOENT) {
		warn("remove(%s)", path);
		ret = 1;
	}
	if (symlink(value, path)) {
		warn("symlink(%s -> %s)", path, value);
		ret = 1;
	}
	return (ret);
}


/*
 * Make a symlink for "machine" so that "#include <machine/foo.h>" works,
 * and for the machine's CPU architecture, so that works as well.
 */
static int
mksymlinks(void)
{
	int ret;
	char *p, buf[PATH_MAX];
	const char *q;

	snprintf(buf, sizeof buf, "arch/%s/include", machine);
	p = sourcepath(buf);
	ret = mksymlink(p, "machine");
	if (machinearch != NULL) {
		snprintf(buf, sizeof buf, "arch/%s/include", machinearch);
		p = sourcepath(buf);
		q = machinearch;
	} else {
		p = strdup("machine");
		if (!p)
			errx(1, "out of memory");
		q = machine;
	}
	ret |= mksymlink(p, q);
	free(p);

	return (ret);
}

static __dead void
stop(void)
{
	(void)fprintf(stderr, "*** Stop.\n");
	exit(1);
}

/*
 * Define a standard option, for which a header file will be generated.
 */
void
defoption(const char *name)
{
	char *p, *low, c;
	const char *n;

	/*
	 * Convert to lower case.  The header file name will be
	 * in lower case, so we store the lower case version in
	 * the hash table to detect option name collisions.  The
	 * original string will be stored in the nvlist for use
	 * in the header file.
	 */
	low = emalloc(strlen(name) + 1);
	for (n = name, p = low; (c = *n) != '\0'; n++)
		*p++ = isupper((unsigned char)c) ?
		    tolower((unsigned char)c) : c;
	*p = 0;

	n = intern(low);
	free(low);
	(void)do_option(defopttab, &nextdefopt, n, name, "defopt");

	/*
	 * Insert a verbatim copy of the option name, as well,
	 * to speed lookups when creating the Makefile.
	 */
	(void)ht_insert(defopttab, name, (void *)name);
}

/*
 * Remove an option.
 */
void
removeoption(const char *name)
{
	struct nvlist *nv, *nvt;
	char *p, *low, c;
	const char *n;

	if ((nv = ht_lookup(opttab, name)) != NULL) {
		if (options == nv) {
			options = nv->nv_next;
			nvfree(nv);
		} else {
			nvt = options;
			while (nvt->nv_next != NULL) {
				if (nvt->nv_next == nv) {
					nvt->nv_next = nvt->nv_next->nv_next;
					nvfree(nv);
					break;
				} else
					nvt = nvt->nv_next;
			}
		}
	}

	(void)ht_remove(opttab, name);

	low = emalloc(strlen(name) + 1);
	/* make lowercase, then remove from select table */
	for (n = name, p = low; (c = *n) != '\0'; n++)
		*p++ = isupper((unsigned char)c) ?
		    tolower((unsigned char)c) : c;
	*p = 0;
	n = intern(low);
	free(low);
	(void)ht_remove(selecttab, n);
}

/*
 * Add an option from "options FOO".  Note that this selects things that
 * are "optional foo".
 */
void
addoption(const char *name, const char *value)
{
	char *p, *low, c;
	const char *n;

	if (do_option(opttab, &nextopt, name, value, "options"))
		return;

	low = emalloc(strlen(name) + 1);
	/* make lowercase, then add to select table */
	for (n = name, p = low; (c = *n) != '\0'; n++)
		*p++ = isupper((unsigned char)c) ?
		    tolower((unsigned char)c) : c;
	*p = 0;
	n = intern(low);
	free(low);
	(void)ht_insert(selecttab, n, (void *)n);
}

/*
 * Add a "make" option.
 */
void
addmkoption(const char *name, const char *value)
{

	(void)do_option(mkopttab, &nextmkopt, name, value, "mkoptions");
}

/*
 * Add a name=value pair to an option list.  The value may be NULL.
 */
static int
do_option(struct hashtab *ht, struct nvlist ***nppp, const char *name,
    const char *value, const char *type)
{
	struct nvlist *nv;

	/* assume it will work */
	nv = newnv(name, value, NULL, 0, NULL);
	if (ht_insert(ht, name, nv) == 0) {
		**nppp = nv;
		*nppp = &nv->nv_next;
		return (0);
	}

	/* oops, already got that option */
	nvfree(nv);
	if ((nv = ht_lookup(ht, name)) == NULL)
		panic("do_option");
	if (nv->nv_str != NULL)
		error("already have %s `%s=%s'", type, name, nv->nv_str);
	else
		error("already have %s `%s'", type, name);
	return (1);
}

/*
 * Return true if there is at least one instance of the given unit
 * on the given device attachment (or any units, if unit == WILD).
 */
int
deva_has_instances(struct deva *deva, int unit)
{
	struct devi *i;

	if (unit == WILD)
		return (deva->d_ihead != NULL);
	for (i = deva->d_ihead; i != NULL; i = i->i_asame)
		if (unit == i->i_unit)
			return (1);
	return (0);
}

/*
 * Return true if there is at least one instance of the given unit
 * on the given base (or any units, if unit == WILD).
 */
int
devbase_has_instances(struct devbase *dev, int unit)
{
	struct deva *da;

	for (da = dev->d_ahead; da != NULL; da = da->d_bsame)
		if (deva_has_instances(da, unit))
			return (1);
	return (0);
}

static int
hasparent(struct devi *i)
{
	struct nvlist *nv;
	int atunit = i->i_atunit;

	/*
	 * We determine whether or not a device has a parent in in one
	 * of two ways:
	 *	(1) If a parent device was named in the config file,
	 *	    i.e. cases (2) and (3) in sem.c:adddev(), then
	 *	    we search its devbase for a matching unit number.
	 *	(2) If the device was attach to an attribute, then we
	 *	    search all attributes the device can be attached to
	 *	    for parents (with appropriate unit numbers) that
	 *	    may be able to attach the device.
	 */

	/*
	 * Case (1): A parent was named.  Either it's configured, or not.
	 */
	if (i->i_atdev != NULL)
		return (devbase_has_instances(i->i_atdev, atunit));

	/*
	 * Case (2): No parent was named.  Look for devs that provide the attr.
	 */
	if (i->i_atattr != NULL)
		for (nv = i->i_atattr->a_refs; nv != NULL; nv = nv->nv_next)
			if (devbase_has_instances(nv->nv_ptr, atunit))
				return (1);
	return (0);
}

static int
cfcrosscheck(struct config *cf, const char *what, struct nvlist *nv)
{
	struct devbase *dev;
	struct devi *pd;
	int errs, devminor;

	if (maxpartitions <= 0)
		panic("cfcrosscheck");

	for (errs = 0; nv != NULL; nv = nv->nv_next) {
		if (nv->nv_name == NULL)
			continue;
		dev = ht_lookup(devbasetab, nv->nv_name);
		if (dev == NULL)
			panic("cfcrosscheck(%s)", nv->nv_name);
		devminor = minor(nv->nv_int) / maxpartitions;
		if (devbase_has_instances(dev, devminor))
			continue;
		if (devbase_has_instances(dev, STAR) &&
		    devminor >= dev->d_umax)
			continue;
		for (pd = allpseudo; pd != NULL; pd = pd->i_next)
			if (pd->i_base == dev && devminor < dev->d_umax &&
			    devminor >= 0)
				goto loop;
		(void)fprintf(stderr,
		    "%s:%d: %s says %s on %s, but there's no %s\n",
		    conffile, cf->cf_lineno,
		    cf->cf_name, what, nv->nv_str, nv->nv_str);
		errs++;
loop:
		;
	}
	return (errs);
}

/*
 * Cross-check the configuration: make sure that each target device
 * or attribute (`at foo[0*?]') names at least one real device.  Also
 * see that the root, swap, and dump devices for all configurations
 * are there.
 */
int
crosscheck(void)
{
	struct devi *i;
	struct config *cf;
	int errs;

	errs = 0;
	for (i = alldevi; i != NULL; i = i->i_next) {
		if (i->i_at == NULL || hasparent(i))
			continue;
		xerror(conffile, i->i_lineno,
		    "%s at %s is orphaned", i->i_name, i->i_at);
		(void)fprintf(stderr, " (%s %s declared)\n",
		    i->i_atunit == WILD ? "nothing matching" : "no",
		    i->i_at);
		errs++;
	}
	if (allcf == NULL) {
		(void)fprintf(stderr, "%s has no configurations!\n",
		    conffile);
		errs++;
	}
	for (cf = allcf; cf != NULL; cf = cf->cf_next) {
		if (cf->cf_root != NULL) {	/* i.e., not swap generic */
			errs += cfcrosscheck(cf, "root", cf->cf_root);
			errs += cfcrosscheck(cf, "swap", cf->cf_swap);
			errs += cfcrosscheck(cf, "dumps", cf->cf_dump);
		}
	}
	return (errs);
}

/*
 * Check to see if there is a *'d unit with a needs-count file.
 */
int
badstar(void)
{
	struct devbase *d;
	struct deva *da;
	struct devi *i;
	int errs, n;

	errs = 0;
	for (d = allbases; d != NULL; d = d->d_next) {
		for (da = d->d_ahead; da != NULL; da = da->d_bsame)
			for (i = da->d_ihead; i != NULL; i = i->i_asame) {
				if (i->i_unit == STAR)
					goto foundstar;
			}
		continue;
	foundstar:
		if (ht_lookup(needcnttab, d->d_name)) {
			warnx("%s's cannot be *'d until its driver is fixed",
			    d->d_name);
			errs++;
			continue;
		}
		for (n = 0; i != NULL; i = i->i_alias)
			if (!i->i_collapsed)
				n++;
		if (n < 1)
			panic("badstar() n<1");
	}
	return (errs);
}

/*
 * Verify/create builddir if necessary, change to it, and verify srcdir.
 * This will be called when we see the first include.
 */
void
setupdirs(void)
{
	struct stat st;
	FILE *fp;

	/* srcdir must be specified if builddir is not specified or if
	 * no configuration filename was specified. */
	if ((builddir || strcmp(defbuilddir, ".") == 0) && !srcdir) {
		error("source directory must be specified");
		exit(1);
	}

	if (srcdir == NULL)
		srcdir = "../../../..";
	if (builddir == NULL)
		builddir = defbuilddir;

	if (stat(builddir, &st) != 0) {
		if (mkdir(builddir, 0777))
			err(2, "cannot create %s", builddir);
	} else if (!S_ISDIR(st.st_mode))
		errc(2, ENOTDIR, "%s", builddir);
	if (chdir(builddir) != 0)
		errx(2, "cannot change to %s", builddir);
	if (stat(srcdir, &st) != 0 || !S_ISDIR(st.st_mode))
		errc(2, ENOTDIR, "%s", srcdir);

	if (bflag) {
		if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
			err(1, "pledge");
		return;
	}

	if (stat("obj", &st) == 0)
		goto reconfig;

	fp = fopen("Makefile", "w");
	if (!fp)
		errx(2, "cannot create Makefile");
	if (fprintf(fp, ".include \"../Makefile.inc\"\n") < 0 ||
	    fclose(fp) == EOF)
		errx(2, "cannot write Makefile");

reconfig:
	if (system("make obj") != 0)
		exit(2);
	if (system("make config") != 0)
		exit(2);
	exit(0);
}

struct opt {
	const char *name;
	const char *val;
};

int
optcmp(const void *v1, const void *v2)
{
	const struct opt *sp1 = v1, *sp2 = v2;
	int r;

	r = strcmp(sp1->name, sp2->name);
	if (r == 0) {
		if (!sp1->val && !sp2->val)
			r = 0;
		else if (sp1->val && !sp2->val)
			r = -1;
		else if (sp2->val && !sp1->val)
			r = 1;
		else r = strcmp(sp1->val, sp2->val);
	}
	return (r);
}

void
optiondelta(void)
{
	struct nvlist *nv;
	char nbuf[BUFSIZ], obuf[BUFSIZ];	/* XXX size */
	int nnewopts, ret = 0, i;
	struct opt *newopts;
	FILE *fp;

	for (nnewopts = 0, nv = options; nv != NULL; nv = nv->nv_next)
		nnewopts++;
	newopts = ereallocarray(NULL, nnewopts, sizeof(struct opt));
	if (newopts == NULL)
		ret = 0;
	for (i = 0, nv = options; nv != NULL; nv = nv->nv_next, i++) {
		newopts[i].name = nv->nv_name;
		newopts[i].val = nv->nv_str;
	}
	qsort(newopts, nnewopts, sizeof (struct opt), optcmp);

	/* compare options against previous config */
	if ((fp = fopen("options", "r"))) {
		for (i = 0; !feof(fp) && i < nnewopts && ret == 0; i++) {
			if (newopts[i].val)
				snprintf(nbuf, sizeof nbuf, "%s=%s\n",
				    newopts[i].name, newopts[i].val);
			else
				snprintf(nbuf, sizeof nbuf, "%s\n",
				    newopts[i].name);
			if (fgets(obuf, sizeof obuf, fp) == NULL ||
			    strcmp(nbuf, obuf))
				ret = 1;
		}
		fclose(fp);
		fp = NULL;
	} else if (access("options", F_OK) == 0)
		ret = 1;

	/* replace with the new list of options */
	if ((fp = fopen("options", "w+"))) {
		rewind(fp);
		for (i = 0; i < nnewopts; i++) {
			if (newopts[i].val)
				fprintf(fp, "%s=%s\n", newopts[i].name,
				    newopts[i].val);
			else
				fprintf(fp, "%s\n", newopts[i].name);
		}
		fclose(fp);
	}
	free(newopts);
	if (ret == 0)
		return;
	(void)printf("Kernel options have changed -- you must run \"make clean\"\n");
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: main.c,v 1.59 2017/06/22 15:57:16 deraadt Exp $ */
2			/* $NetBSD: main.c,v 1.22 1997/02/02 21:12:33 thorpej Exp $ */
3
4			/*
5			* Copyright (c) 1992, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* This software was developed by the Computer Systems Engineering group
9			* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10			* contributed to Berkeley.
11			*
12			* All advertising materials mentioning features or use of this software
13			* must display the following acknowledgement:
14			* This product includes software developed by the University of
15			* California, Lawrence Berkeley Laboratories.
16			*
17			* Redistribution and use in source and binary forms, with or without
18			* modification, are permitted provided that the following conditions
19			* are met:
20			* 1. Redistributions of source code must retain the above copyright
21			* notice, this list of conditions and the following disclaimer.
22			* 2. Redistributions in binary form must reproduce the above copyright
23			* notice, this list of conditions and the following disclaimer in the
24			* documentation and/or other materials provided with the distribution.
25			* 3. Neither the name of the University nor the names of its contributors
26			* may be used to endorse or promote products derived from this software
27			* without specific prior written permission.
28			*
29			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39			* SUCH DAMAGE.
40			*
41			* from: @(#)main.c 8.1 (Berkeley) 6/6/93
42			*/
43
44			#include <sys/types.h>
45			#include <sys/stat.h>
46
47			#include <ctype.h>
48			#include <err.h>
49			#include <errno.h>
50			#include <stdio.h>
51			#include <stdlib.h>
52			#include <string.h>
53			#include <unistd.h>
54			#include <limits.h>
55
56			#include "config.h"
57
58			int firstfile(const char *);
59			int yyparse(void);
60
61			static struct hashtab *mkopttab;
62			static struct nvlist **nextopt;
63			static struct nvlist **nextdefopt;
64			static struct nvlist **nextmkopt;
65
66			static __dead void stop(void);
67			static int do_option(struct hashtab , struct nvlist **,
68			const char , const char , const char *);
69			static int crosscheck(void);
70			static int badstar(void);
71			static int mksymlinks(void);
72			static int hasparent(struct devi *);
73			static int cfcrosscheck(struct config , const char , struct nvlist *);
74			static void optiondelta(void);
75
76			int verbose;
77
78			__dead void
79			usage(void)
80			{
81			extern char *__progname;
82
83			fprintf(stderr,
84			"usage: %s [-p] [-b builddir] [-s srcdir] [config-file]\n"
85			" %s [-u] [-f \| -o outfile] -e infile\n",
86			__progname, __progname);
87
88			exit(1);
89			}
90
91			int pflag = 0;
92			char *sflag = NULL;
93			char *bflag = NULL;
94			char *startdir;
95
96			int
97			main(int argc, char *argv[])
98			{
99			char *p;
100			char *outfile = NULL;
101			int ch, eflag, uflag, fflag;
102			char dirbuffer[PATH_MAX];
103
104			if (pledge("stdio rpath wpath cpath flock proc exec", NULL) == -1)
105			err(1, "pledge");
106
107			pflag = eflag = uflag = fflag = 0;
108			while ((ch = getopt(argc, argv, "epfb:s:o:u")) != -1) {
109			switch (ch) {
110
111			case 'o':
112			outfile = optarg;
113			break;
114			case 'u':
115			uflag = 1;
116			break;
117			case 'f':
118			fflag = 1;
119			break;
120
121			case 'e':
122			eflag = 1;
123			if (!isatty(STDIN_FILENO))
124			verbose = 1;
125			break;
126
127			case 'p':
128			/*
129			* Essentially the same as makeoptions PROF="-pg",
130			* but also changes the path from ../../compile/FOO
131			* to ../../compile/FOO.PROF; i.e., compile a
132			* profiling kernel based on a typical "regular"
133			* kernel.
134			*
135			* Note that if you always want profiling, you
136			* can (and should) use a "makeoptions" line.
137			*/
138			pflag = 1;
139			break;
140
141			case 'b':
142			bflag = optarg;
143			builddir = optarg;
144			break;
145
146			case 's':
147			sflag = optarg;
148			srcdir = optarg;
149			break;
150
151			default:
152			usage();
153			}
154			}
155
156			argc -= optind;
157			argv += optind;
158			if (argc > 1 \|\| (eflag && argv[0] == NULL))
159			usage();
160			if (bflag) {
161			startdir = getcwd(dirbuffer, sizeof dirbuffer);
162			if (startdir == NULL)
163			warn("Use of -b and can't getcwd, no make config");
164			} else {
165			startdir = "../../conf";
166			}
167
168			if (eflag) {
169			#ifdef MAKE_BOOTSTRAP
170			errx(1, "UKC not available in this binary");
171			#else
172			return (ukc(argv[0], outfile, uflag, fflag));
173			#endif
174			}
175
176			conffile = (argc == 1) ? argv[0] : "CONFIG";
177			if (firstfile(conffile))
178			err(2, "cannot read %s", conffile);
179
180			/*
181			* Init variables.
182			*/
183			minmaxusers = 1;
184			maxmaxusers = 10000;
185			initintern();
186			initfiles();
187			initsem();
188			devbasetab = ht_new();
189			devatab = ht_new();
190			selecttab = ht_new();
191			needcnttab = ht_new();
192			opttab = ht_new();
193			mkopttab = ht_new();
194			defopttab = ht_new();
195			nextopt = &options;
196			nextmkopt = &mkoptions;
197			nextdefopt = &defoptions;
198
199			/*
200			* Handle profiling (must do this before we try to create any
201			* files).
202			*/
203			last_component = strrchr(conffile, '/');
204			last_component = (last_component) ? last_component + 1 : conffile;
205			if (pflag) {
206			if (asprintf(&p, "../compile/%s.PROF", last_component) == -1)
207			err(1, NULL);
208			(void)addmkoption(intern("PROF"), "-pg");
209			(void)addoption(intern("GPROF"), NULL);
210			} else {
211			if (asprintf(&p, "../compile/%s", last_component) == -1)
212			err(1, NULL);
213			}
214			defbuilddir = (argc == 0) ? "." : p;
215
216			/*
217			* Parse config file (including machine definitions).
218			*/
219			if (yyparse())
220			stop();
221
222			/*
223			* Fix (as in `set firmly in place') files.
224			*/
225			if (fixfiles())
226			stop();
227
228			/*
229			* Fix objects and libraries.
230			*/
231			if (fixobjects())
232			stop();
233
234			/*
235			* Perform cross-checking.
236			*/
237			if (maxusers == 0) {
238			if (defmaxusers) {
239			(void)printf("maxusers not specified; %d assumed\n",
240			defmaxusers);
241			maxusers = defmaxusers;
242			} else {
243			warnx("need \"maxusers\" line");
244			errors++;
245			}
246			}
247			if (crosscheck() \|\| errors)
248			stop();
249
250			/*
251			* Squeeze things down and finish cross-checks (STAR checks must
252			* run after packing).
253			*/
254			pack();
255			if (badstar())
256			stop();
257
258			/*
259			* Ready to go. Build all the various files.
260			*/
261			if (mksymlinks() \|\| mkmakefile() \|\| mkheaders() \|\| mkswap() \|\|
262			mkioconf())
263			stop();
264			optiondelta();
265			return (0);
266			}
267
268			static int
269			mksymlink(const char value, const char path)
270			{
271			int ret = 0;
272
273			if (remove(path) && errno != ENOENT) {
274			warn("remove(%s)", path);
275			ret = 1;
276			}
277			if (symlink(value, path)) {
278			warn("symlink(%s -> %s)", path, value);
279			ret = 1;
280			}
281			return (ret);
282			}
283
284
285			/*
286			* Make a symlink for "machine" so that "#include <machine/foo.h>" works,
287			* and for the machine's CPU architecture, so that works as well.
288			*/
289			static int
290			mksymlinks(void)
291			{
292			int ret;
293			char *p, buf[PATH_MAX];
294			const char *q;
295
296			snprintf(buf, sizeof buf, "arch/%s/include", machine);
297			p = sourcepath(buf);
298			ret = mksymlink(p, "machine");
299			if (machinearch != NULL) {
300			snprintf(buf, sizeof buf, "arch/%s/include", machinearch);
301			p = sourcepath(buf);
302			q = machinearch;
303			} else {
304			p = strdup("machine");
305			if (!p)
306			errx(1, "out of memory");
307			q = machine;
308			}
309			ret \|= mksymlink(p, q);
310			free(p);
311
312			return (ret);
313			}
314
315			static __dead void
316			stop(void)
317			{
318			(void)fprintf(stderr, "*** Stop.\n");
319			exit(1);
320			}
321
322			/*
323			* Define a standard option, for which a header file will be generated.
324			*/
325			void
326			defoption(const char *name)
327			{
328			char p, low, c;
329			const char *n;
330
331			/*
332			* Convert to lower case. The header file name will be
333			* in lower case, so we store the lower case version in
334			* the hash table to detect option name collisions. The
335			* original string will be stored in the nvlist for use
336			* in the header file.
337			*/
338			low = emalloc(strlen(name) + 1);
339			for (n = name, p = low; (c = *n) != '\0'; n++)
340			*p++ = isupper((unsigned char)c) ?
341			tolower((unsigned char)c) : c;
342			*p = 0;
343
344			n = intern(low);
345			free(low);
346			(void)do_option(defopttab, &nextdefopt, n, name, "defopt");
347
348			/*
349			* Insert a verbatim copy of the option name, as well,
350			* to speed lookups when creating the Makefile.
351			*/
352			(void)ht_insert(defopttab, name, (void *)name);
353			}
354
355			/*
356			* Remove an option.
357			*/
358			void
359			removeoption(const char *name)
360			{
361			struct nvlist nv, nvt;
362			char p, low, c;
363			const char *n;
364
365			if ((nv = ht_lookup(opttab, name)) != NULL) {
366			if (options == nv) {
367			options = nv->nv_next;
368			nvfree(nv);
369			} else {
370			nvt = options;
371			while (nvt->nv_next != NULL) {
372			if (nvt->nv_next == nv) {
373			nvt->nv_next = nvt->nv_next->nv_next;
374			nvfree(nv);
375			break;
376			} else
377			nvt = nvt->nv_next;
378			}
379			}
380			}
381
382			(void)ht_remove(opttab, name);
383
384			low = emalloc(strlen(name) + 1);
385			/* make lowercase, then remove from select table */
386			for (n = name, p = low; (c = *n) != '\0'; n++)
387			*p++ = isupper((unsigned char)c) ?
388			tolower((unsigned char)c) : c;
389			*p = 0;
390			n = intern(low);
391			free(low);
392			(void)ht_remove(selecttab, n);
393			}
394
395			/*
396			* Add an option from "options FOO". Note that this selects things that
397			* are "optional foo".
398			*/
399			void
400			addoption(const char name, const char value)
401			{
402			char p, low, c;
403			const char *n;
404
405			if (do_option(opttab, &nextopt, name, value, "options"))
406			return;
407
408			low = emalloc(strlen(name) + 1);
409			/* make lowercase, then add to select table */
410			for (n = name, p = low; (c = *n) != '\0'; n++)
411			*p++ = isupper((unsigned char)c) ?
412			tolower((unsigned char)c) : c;
413			*p = 0;
414			n = intern(low);
415			free(low);
416			(void)ht_insert(selecttab, n, (void *)n);
417			}
418
419			/*
420			* Add a "make" option.
421			*/
422			void
423			addmkoption(const char name, const char value)
424			{
425
426			(void)do_option(mkopttab, &nextmkopt, name, value, "mkoptions");
427			}
428
429			/*
430			* Add a name=value pair to an option list. The value may be NULL.
431			*/
432			static int
433			do_option(struct hashtab ht, struct nvlist *nppp, const char name,
434			const char value, const char type)
435			{
436			struct nvlist *nv;
437
438			/* assume it will work */
439			nv = newnv(name, value, NULL, 0, NULL);
440			if (ht_insert(ht, name, nv) == 0) {
441			**nppp = nv;
442			*nppp = &nv->nv_next;
443			return (0);
444			}
445
446			/* oops, already got that option */
447			nvfree(nv);
448			if ((nv = ht_lookup(ht, name)) == NULL)
449			panic("do_option");
450			if (nv->nv_str != NULL)
451			error("already have %s `%s=%s'", type, name, nv->nv_str);
452			else
453			error("already have %s `%s'", type, name);
454			return (1);
455			}
456
457			/*
458			* Return true if there is at least one instance of the given unit
459			* on the given device attachment (or any units, if unit == WILD).
460			*/
461			int
462			deva_has_instances(struct deva *deva, int unit)
463			{
464			struct devi *i;
465
466			if (unit == WILD)
467			return (deva->d_ihead != NULL);
468			for (i = deva->d_ihead; i != NULL; i = i->i_asame)
469			if (unit == i->i_unit)
470			return (1);
471			return (0);
472			}
473
474			/*
475			* Return true if there is at least one instance of the given unit
476			* on the given base (or any units, if unit == WILD).
477			*/
478			int
479			devbase_has_instances(struct devbase *dev, int unit)
480			{
481			struct deva *da;
482
483			for (da = dev->d_ahead; da != NULL; da = da->d_bsame)
484			if (deva_has_instances(da, unit))
485			return (1);
486			return (0);
487			}
488
489			static int
490			hasparent(struct devi *i)
491			{
492			struct nvlist *nv;
493			int atunit = i->i_atunit;
494
495			/*
496			* We determine whether or not a device has a parent in in one
497			* of two ways:
498			* (1) If a parent device was named in the config file,
499			* i.e. cases (2) and (3) in sem.c:adddev(), then
500			* we search its devbase for a matching unit number.
501			* (2) If the device was attach to an attribute, then we
502			* search all attributes the device can be attached to
503			* for parents (with appropriate unit numbers) that
504			* may be able to attach the device.
505			*/
506
507			/*
508			* Case (1): A parent was named. Either it's configured, or not.
509			*/
510			if (i->i_atdev != NULL)
511			return (devbase_has_instances(i->i_atdev, atunit));
512
513			/*
514			* Case (2): No parent was named. Look for devs that provide the attr.
515			*/
516			if (i->i_atattr != NULL)
517			for (nv = i->i_atattr->a_refs; nv != NULL; nv = nv->nv_next)
518			if (devbase_has_instances(nv->nv_ptr, atunit))
519			return (1);
520			return (0);
521			}
522
523			static int
524			cfcrosscheck(struct config cf, const char what, struct nvlist *nv)
525			{
526			struct devbase *dev;
527			struct devi *pd;
528			int errs, devminor;
529
530			if (maxpartitions <= 0)
531			panic("cfcrosscheck");
532
533			for (errs = 0; nv != NULL; nv = nv->nv_next) {
534			if (nv->nv_name == NULL)
535			continue;
536			dev = ht_lookup(devbasetab, nv->nv_name);
537			if (dev == NULL)
538			panic("cfcrosscheck(%s)", nv->nv_name);
539			devminor = minor(nv->nv_int) / maxpartitions;
540			if (devbase_has_instances(dev, devminor))
541			continue;
542			if (devbase_has_instances(dev, STAR) &&
543			devminor >= dev->d_umax)
544			continue;
545			for (pd = allpseudo; pd != NULL; pd = pd->i_next)
546			if (pd->i_base == dev && devminor < dev->d_umax &&
547			devminor >= 0)
548			goto loop;
549			(void)fprintf(stderr,
550			"%s:%d: %s says %s on %s, but there's no %s\n",
551			conffile, cf->cf_lineno,
552			cf->cf_name, what, nv->nv_str, nv->nv_str);
553			errs++;
554			loop:
555			;
556			}
557			return (errs);
558			}
559
560			/*
561			* Cross-check the configuration: make sure that each target device
562			* or attribute (`at foo[0*?]') names at least one real device. Also
563			* see that the root, swap, and dump devices for all configurations
564			* are there.
565			*/
566			int
567			crosscheck(void)
568			{
569			struct devi *i;
570			struct config *cf;
571			int errs;
572
573			errs = 0;
574			for (i = alldevi; i != NULL; i = i->i_next) {
575			if (i->i_at == NULL \|\| hasparent(i))
576			continue;
577			xerror(conffile, i->i_lineno,
578			"%s at %s is orphaned", i->i_name, i->i_at);
579			(void)fprintf(stderr, " (%s %s declared)\n",
580			i->i_atunit == WILD ? "nothing matching" : "no",
581			i->i_at);
582			errs++;
583			}
584			if (allcf == NULL) {
585			(void)fprintf(stderr, "%s has no configurations!\n",
586			conffile);
587			errs++;
588			}
589			for (cf = allcf; cf != NULL; cf = cf->cf_next) {
590			if (cf->cf_root != NULL) { /* i.e., not swap generic */
591			errs += cfcrosscheck(cf, "root", cf->cf_root);
592			errs += cfcrosscheck(cf, "swap", cf->cf_swap);
593			errs += cfcrosscheck(cf, "dumps", cf->cf_dump);
594			}
595			}
596			return (errs);
597			}
598
599			/*
600			* Check to see if there is a *'d unit with a needs-count file.
601			*/
602			int
603			badstar(void)
604			{
605			struct devbase *d;
606			struct deva *da;
607			struct devi *i;
608			int errs, n;
609
610			errs = 0;
611			for (d = allbases; d != NULL; d = d->d_next) {
612			for (da = d->d_ahead; da != NULL; da = da->d_bsame)
613			for (i = da->d_ihead; i != NULL; i = i->i_asame) {
614			if (i->i_unit == STAR)
615			goto foundstar;
616			}
617			continue;
618			foundstar:
619			if (ht_lookup(needcnttab, d->d_name)) {
620			warnx("%s's cannot be *'d until its driver is fixed",
621			d->d_name);
622			errs++;
623			continue;
624			}
625			for (n = 0; i != NULL; i = i->i_alias)
626			if (!i->i_collapsed)
627			n++;
628			if (n < 1)
629			panic("badstar() n<1");
630			}
631			return (errs);
632			}
633
634			/*
635			* Verify/create builddir if necessary, change to it, and verify srcdir.
636			* This will be called when we see the first include.
637			*/
638			void
639			setupdirs(void)
640			{
641			struct stat st;
642			FILE *fp;
643
644			/* srcdir must be specified if builddir is not specified or if
645			* no configuration filename was specified. */
646			if ((builddir \|\| strcmp(defbuilddir, ".") == 0) && !srcdir) {
647			error("source directory must be specified");
648			exit(1);
649			}
650
651			if (srcdir == NULL)
652			srcdir = "../../../..";
653			if (builddir == NULL)
654			builddir = defbuilddir;
655
656			if (stat(builddir, &st) != 0) {
657			if (mkdir(builddir, 0777))
658			err(2, "cannot create %s", builddir);
659			} else if (!S_ISDIR(st.st_mode))
660			errc(2, ENOTDIR, "%s", builddir);
661			if (chdir(builddir) != 0)
662			errx(2, "cannot change to %s", builddir);
663			if (stat(srcdir, &st) != 0 \|\| !S_ISDIR(st.st_mode))
664			errc(2, ENOTDIR, "%s", srcdir);
665
666			if (bflag) {
667			if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
668			err(1, "pledge");
669			return;
670			}
671
672			if (stat("obj", &st) == 0)
673			goto reconfig;
674
675			fp = fopen("Makefile", "w");
676			if (!fp)
677			errx(2, "cannot create Makefile");
678			if (fprintf(fp, ".include \"../Makefile.inc\"\n") < 0 \|\|
679			fclose(fp) == EOF)
680			errx(2, "cannot write Makefile");
681
682			reconfig:
683			if (system("make obj") != 0)
684			exit(2);
685			if (system("make config") != 0)
686			exit(2);
687			exit(0);
688			}
689
690			struct opt {
691			const char *name;
692			const char *val;
693			};
694
695			int
696			optcmp(const void v1, const void v2)
697			{
698			const struct opt sp1 = v1, sp2 = v2;
699			int r;
700
701			r = strcmp(sp1->name, sp2->name);
702			if (r == 0) {
703			if (!sp1->val && !sp2->val)
704			r = 0;
705			else if (sp1->val && !sp2->val)
706			r = -1;
707			else if (sp2->val && !sp1->val)
708			r = 1;
709			else r = strcmp(sp1->val, sp2->val);
710			}
711			return (r);
712			}
713
714			void
715			optiondelta(void)
716			{
717			struct nvlist *nv;
718			char nbuf[BUFSIZ], obuf[BUFSIZ]; /* XXX size */
719			int nnewopts, ret = 0, i;
720			struct opt *newopts;
721			FILE *fp;
722
723			for (nnewopts = 0, nv = options; nv != NULL; nv = nv->nv_next)
724			nnewopts++;
725			newopts = ereallocarray(NULL, nnewopts, sizeof(struct opt));
726			if (newopts == NULL)
727			ret = 0;
728			for (i = 0, nv = options; nv != NULL; nv = nv->nv_next, i++) {
729			newopts[i].name = nv->nv_name;
730			newopts[i].val = nv->nv_str;
731			}
732			qsort(newopts, nnewopts, sizeof (struct opt), optcmp);
733
734			/* compare options against previous config */
735			if ((fp = fopen("options", "r"))) {
736			for (i = 0; !feof(fp) && i < nnewopts && ret == 0; i++) {
737			if (newopts[i].val)
738			snprintf(nbuf, sizeof nbuf, "%s=%s\n",
739			newopts[i].name, newopts[i].val);
740			else
741			snprintf(nbuf, sizeof nbuf, "%s\n",
742			newopts[i].name);
743			if (fgets(obuf, sizeof obuf, fp) == NULL \|\|
744			strcmp(nbuf, obuf))
745			ret = 1;
746			}
747			fclose(fp);
748			fp = NULL;
749			} else if (access("options", F_OK) == 0)
750			ret = 1;
751
752			/* replace with the new list of options */
753			if ((fp = fopen("options", "w+"))) {
754			rewind(fp);
755			for (i = 0; i < nnewopts; i++) {
756			if (newopts[i].val)
757			fprintf(fp, "%s=%s\n", newopts[i].name,
758			newopts[i].val);
759			else
760			fprintf(fp, "%s\n", newopts[i].name);
761			}
762			fclose(fp);
763			}
764			free(newopts);
765			if (ret == 0)
766			return;
767			(void)printf("Kernel options have changed -- you must run \"make clean\"\n");
768			}