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NetBSD/usr.sbin/config/main.c

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/* $NetBSD: main.c,v 1.86 2003/09/14 12:43:04 jmmv 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
*/
#ifndef MAKE_BOOTSTRAP
#include <sys/cdefs.h>
#define COPYRIGHT(x) __COPYRIGHT(x)
#else
#define COPYRIGHT(x) static const char copyright[] = x
#endif
#ifndef lint
COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/mman.h>
#include <paths.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "defs.h"
#include "sem.h"
#include <vis.h>
#ifndef LINE_MAX
#define LINE_MAX 1024
#endif
int vflag; /* verbose output */
int Pflag; /* pack locators */
int yyparse(void);
#ifndef MAKE_BOOTSTRAP
extern int yydebug;
#endif
static struct hashtab *mkopttab;
static struct nvlist **nextopt;
static struct nvlist **nextmkopt;
static struct nvlist **nextfsopt;
static void usage(void);
static void dependopts(void);
static void do_depend(struct nvlist *);
static void stop(void);
static int do_option(struct hashtab *, struct nvlist ***,
const char *, const char *, const char *);
static int undo_option(struct hashtab *, struct nvlist **,
struct nvlist ***, const char *, const char *);
static int crosscheck(void);
static int badstar(void);
int main(int, char **);
static int mksymlinks(void);
static int mkident(void);
static int hasparent(struct devi *);
static int cfcrosscheck(struct config *, const char *, struct nvlist *);
static const char *strtolower(const char *);
void defopt(struct hashtab *ht, const char *fname,
struct nvlist *opts, struct nvlist *deps);
#define LOGCONFIG_LARGE "INCLUDE_CONFIG_FILE"
#define LOGCONFIG_SMALL "INCLUDE_JUST_CONFIG"
static void logconfig_start(void);
static void logconfig_end(void);
static FILE *cfg;
static time_t cfgtime;
static int is_elf(const char *);
static int extract_config(const char *, const char *, int);
int badfilename(const char *fname);
const char *progname;
int
main(int argc, char **argv)
{
char *p, cname[20];
const char *last_component;
int pflag, xflag, ch, removeit;
setprogname(argv[0]);
pflag = 0;
xflag = 0;
while ((ch = getopt(argc, argv, "DPgpvb:s:x")) != -1) {
switch (ch) {
#ifndef MAKE_BOOTSTRAP
case 'D':
yydebug = 1;
break;
#endif
case 'P':
Pflag = 1;
break;
case 'g':
/*
* In addition to DEBUG, you probably wanted to
* set "options KGDB" and maybe others. We could
* do that for you, but you really should just
* put them in the config file.
*/
(void)fputs(
"-g is obsolete (use makeoptions DEBUG=\"-g\")\n",
stderr);
usage();
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 'v':
vflag = 1;
break;
case 'b':
builddir = optarg;
break;
case 's':
srcdir = optarg;
break;
case 'x':
xflag = 1;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc > 1) {
usage();
}
if (xflag && (builddir != NULL || srcdir != NULL || Pflag || pflag ||
vflag)) {
(void)fprintf(stderr, "config: -x must be used alone\n");
exit(1);
}
if (xflag) {
conffile = (argc == 1) ? argv[0] : _PATH_UNIX;
if (!is_elf(conffile)) {
(void)fprintf(stderr, "%s: not a binary kernel\n",
conffile);
exit(1);
}
if (!extract_config(conffile, "stdout", STDOUT_FILENO)) {
(void)fprintf(stderr,
"config: %s does not contain embedded "
"configuration data\n", conffile);
exit(2);
}
exit(0);
}
conffile = (argc == 1) ? argv[0] : "CONFIG";
if (firstfile(conffile)) {
(void)fprintf(stderr, "config: cannot read %s: %s\n",
conffile, strerror(errno));
exit(2);
}
/*
* Init variables.
*/
minmaxusers = 1;
maxmaxusers = 10000;
initintern();
initfiles();
initsem();
ident = NULL;
devbasetab = ht_new();
devatab = ht_new();
devitab = ht_new();
selecttab = ht_new();
needcnttab = ht_new();
opttab = ht_new();
mkopttab = ht_new();
fsopttab = ht_new();
deffstab = ht_new();
defopttab = ht_new();
defparamtab = ht_new();
defflagtab = ht_new();
optfiletab = ht_new();
bdevmtab = ht_new();
maxbdevm = 0;
cdevmtab = ht_new();
maxcdevm = 0;
nextopt = &options;
nextmkopt = &mkoptions;
nextfsopt = &fsoptions;
/*
* 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) {
p = emalloc(strlen(last_component) + 17);
(void)sprintf(p, "../compile/%s.PROF", last_component);
(void)addmkoption(intern("PROF"), "-pg");
(void)addoption(intern("GPROF"), NULL);
} else {
p = emalloc(strlen(last_component) + 13);
(void)sprintf(p, "../compile/%s", last_component);
}
defbuilddir = (argc == 0) ? "." : p;
removeit = 0;
if (is_elf(conffile)) {
const char *tmpdir;
int cfd;
if (builddir == NULL) {
(void)fprintf(stderr,
"config: build directory must be specified with "
"binary kernels\n");
exit(1);
}
/* Open temporary configuration file */
tmpdir = getenv("TMPDIR");
if (tmpdir == NULL)
tmpdir = "/tmp";
snprintf(cname, sizeof(cname), "%s/config.tmp.XXXXXX", tmpdir);
cfd = mkstemp(cname);
if (cfd == -1) {
fprintf(stderr, "config: cannot create %s: %s", cname,
strerror(errno));
exit(2);
}
printf("Using configuration data embedded in kernel...\n");
if (!extract_config(conffile, cname, cfd)) {
(void)fprintf(stderr,
"config: %s does not contain embedded "
"configuration data\n", conffile);
exit(2);
}
removeit = 1;
close(cfd);
firstfile(cname);
}
/*
* Parse config file (including machine definitions).
*/
logconfig_start();
if (yyparse())
stop();
logconfig_end();
if (removeit)
unlink(cname);
/*
* Select devices and pseudo devices and their attributes
*/
fixdevis();
/*
* Deal with option dependencies.
*/
dependopts();
/*
* Fix (as in `set firmly in place') files.
*/
if (fixfiles())
stop();
/*
* Fix objects and libraries.
*/
if (fixobjects())
stop();
/*
* Fix device-majors.
*/
if (fixdevsw())
stop();
/*
* Perform cross-checking.
*/
if (maxusers == 0) {
if (defmaxusers) {
(void)printf("maxusers not specified; %d assumed\n",
defmaxusers);
maxusers = defmaxusers;
} else {
(void)fprintf(stderr,
"config: need \"maxusers\" line\n");
errors++;
}
}
if (fsoptions == NULL) {
(void)fprintf(stderr,
"config: need at least one \"file-system\" line\n");
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() || (do_devsw ? mkdevsw() : 0) || mkident())
stop();
(void)printf("Build directory is %s\n", builddir);
(void)printf("Don't forget to run \"make depend\"\n");
exit(0);
}
static void
usage(void)
{
(void)fputs("usage: config [-Ppv] [-s srcdir] [-b builddir] "
"[sysname]\n", stderr);
(void)fputs(" config -x [kernel-file]\n", stderr);
exit(1);
}
/*
* Set any options that are implied by other options.
*/
static void
dependopts(void)
{
struct nvlist *nv, *opt;
for (nv = options; nv != NULL; nv = nv->nv_next) {
if ((opt = find_declared_option(nv->nv_name)) != NULL) {
for (opt = opt->nv_ptr; opt != NULL;
opt = opt->nv_next) {
do_depend(opt);
}
}
}
}
static void
do_depend(struct nvlist *nv)
{
struct nvlist *nextnv;
struct attr *a;
if (nv != NULL && (nv->nv_flags & NV_DEPENDED) == 0) {
nv->nv_flags |= NV_DEPENDED;
/*
* If the dependency is an attribute, then just add
* it to the selecttab.
*/
if ((a = ht_lookup(attrtab, nv->nv_name)) != NULL) {
if (a->a_iattr)
panic("do_depend(%s): dep `%s' is an iattr",
nv->nv_name, a->a_name);
expandattr(a, selectattr);
} else {
if (ht_lookup(opttab, nv->nv_name) == NULL)
addoption(nv->nv_name, NULL);
if ((nextnv =
find_declared_option(nv->nv_name)) != NULL)
do_depend(nextnv->nv_ptr);
}
}
}
/*
* 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[MAXPATHLEN];
const char *q;
struct nvlist *nv;
snprintf(buf, sizeof(buf), "arch/%s/include", machine);
p = sourcepath(buf);
ret = unlink("machine");
if (ret && errno != ENOENT)
(void)fprintf(stderr, "config: unlink(machine): %s\n",
strerror(errno));
ret = symlink(p, "machine");
if (ret)
(void)fprintf(stderr, "config: symlink(machine -> %s): %s\n",
p, strerror(errno));
free(p);
if (machinearch != NULL) {
snprintf(buf, sizeof(buf), "arch/%s/include", machinearch);
p = sourcepath(buf);
q = machinearch;
} else {
p = estrdup("machine");
q = machine;
}
ret = unlink(q);
if (ret && errno != ENOENT)
(void)fprintf(stderr, "config: unlink(%s): %s\n",
q, strerror(errno));
ret = symlink(p, q);
if (ret)
(void)fprintf(stderr, "config: symlink(%s -> %s): %s\n",
q, p, strerror(errno));
free(p);
for (nv = machinesubarches; nv != NULL; nv = nv->nv_next) {
q = nv->nv_name;
snprintf(buf, sizeof(buf), "arch/%s/include", q);
p = sourcepath(buf);
ret = unlink(q);
if (ret && errno != ENOENT)
(void)fprintf(stderr, "config: unlink(%s): %s\n",
q, strerror(errno));
ret = symlink(p, q);
if (ret)
(void)fprintf(stderr, "config: symlink(%s -> %s): %s\n",
q, p, strerror(errno));
free(p);
}
return (ret);
}
static __dead void
stop(void)
{
(void)fprintf(stderr, "*** Stop.\n");
exit(1);
}
/*
* Define one or more file systems. If file system options file name is
* specified, a preprocessor #define for that file system will be placed
* in that file. In this case, only one file system may be specified.
* Otherwise, no preprocessor #defines will be generated.
*/
void
deffilesystem(const char *fname, struct nvlist *fses)
{
struct nvlist *nv;
/*
* Mark these options as ones to skip when creating the Makefile.
*/
for (nv = fses; nv != NULL; nv = nv->nv_next) {
if (ht_insert(defopttab, nv->nv_name, nv)) {
error("file system or option `%s' already defined",
nv->nv_name);
return;
}
/*
* Also mark it as a valid file system, which may be
* used in "file-system" directives in the config
* file.
*/
if (ht_insert(deffstab, nv->nv_name, nv))
panic("file system `%s' already in table?!",
nv->nv_name);
if (fname != NULL) {
/*
* Only one file system allowed in this case.
*/
if (nv->nv_next != NULL) {
error("only one file system per option "
"file may be specified");
return;
}
if (ht_insert(optfiletab, fname, nv)) {
error("option file `%s' already exists",
fname);
return;
}
}
}
}
/*
* Sanity check a file name.
*/
int
badfilename(const char *fname)
{
const char *n;
/*
* We're putting multiple options into one file. Sanity
* check the file name.
*/
if (strchr(fname, '/') != NULL) {
error("option file name contains a `/'");
return 1;
}
if ((n = strrchr(fname, '.')) == NULL || strcmp(n, ".h") != 0) {
error("option file name does not end in `.h'");
return 1;
}
return 0;
}
/*
* Search for a defined option (defopt, filesystem, etc), and if found,
* return the option's struct nvlist.
*/
struct nvlist *
find_declared_option(const char *name)
{
struct nvlist *option = NULL;
if ((option = ht_lookup(defopttab, name)) != NULL ||
(option = ht_lookup(defparamtab, name)) != NULL ||
(option = ht_lookup(defflagtab, name)) != NULL ||
(option = ht_lookup(fsopttab, name)) != NULL) {
return (option);
}
return (NULL);
}
/*
* Define one or more standard options. If an option file name is specified,
* place all options in one file with the specified name. Otherwise, create
* an option file for each option.
* record the option information in the specified table.
*/
void
defopt(struct hashtab *ht, const char *fname, struct nvlist *opts,
struct nvlist *deps)
{
struct nvlist *nv, *nextnv, *oldnv, *dep;
struct attr *a;
const char *name, *n;
char *p, c;
char low[500];
if (fname != NULL && badfilename(fname)) {
return;
}
/*
* Mark these options as ones to skip when creating the Makefile.
*/
for (nv = opts; nv != NULL; nv = nextnv) {
nextnv = nv->nv_next;
/* An option name can be declared at most once. */
if (DEFINED_OPTION(nv->nv_name)) {
error("file system or option `%s' already defined",
nv->nv_name);
return;
}
if (ht_insert(ht, nv->nv_name, nv)) {
error("file system or option `%s' already defined",
nv->nv_name);
return;
}
if (fname == NULL) {
/*
* Each option will be going into its own file.
* Convert the option name to lower case. This
* lower case name will be used as the option
* file name.
*/
(void) strlcpy(low, "opt_", sizeof(low));
p = low + strlen(low);
for (n = nv->nv_name; (c = *n) != '\0'; n++)
*p++ = isupper(c) ? tolower(c) : c;
*p = '\0';
strlcat(low, ".h", sizeof(low));
name = intern(low);
} else {
name = fname;
}
/* Use nv_ptr to link any other options that are implied. */
nv->nv_ptr = deps;
for (dep = deps; dep != NULL; dep = dep->nv_next) {
/*
* If the dependency is an attribute, it must not
* be an interface attribute. Otherwise, is must
* be a previously declared option.
*/
if ((a = ht_lookup(attrtab, dep->nv_name)) != NULL) {
if (a->a_iattr)
error("option `%s' dependency `%s' "
"is an interface attribute",
nv->nv_name, a->a_name);
} else if (find_declared_option(dep->nv_name) == NULL) {
error("option `%s' dependency `%s' "
"is an unknown option",
nv->nv_name, dep->nv_name);
}
}
/*
* Remove this option from the parameter list before adding
* it to the list associated with this option file.
*/
nv->nv_next = NULL;
/*
* Add this option file if we haven't seen it yet.
* Otherwise, append to the list of options already
* associated with this file.
*/
if ((oldnv = ht_lookup(optfiletab, name)) == NULL) {
(void)ht_insert(optfiletab, name, nv);
} else {
while (oldnv->nv_next != NULL)
oldnv = oldnv->nv_next;
oldnv->nv_next = nv;
}
}
}
/*
* Define one or more standard options. If an option file name is specified,
* place all options in one file with the specified name. Otherwise, create
* an option file for each option.
*/
void
defoption(const char *fname, struct nvlist *opts, struct nvlist *deps)
{
warn("The use of `defopt' is deprecated");
defopt(defopttab, fname, opts, deps);
}
/*
* Define an option for which a value is required.
*/
void
defparam(const char *fname, struct nvlist *opts, struct nvlist *deps)
{
defopt(defparamtab, fname, opts, deps);
}
/*
* Define an option which must have a value, and which
* emits a "needs-flag" style output.
*/
void
defflag(const char *fname, struct nvlist *opts, struct nvlist *deps)
{
defopt(defflagtab, fname, opts, deps);
}
/*
* Add an option from "options FOO". Note that this selects things that
* are "optional foo".
*/
void
addoption(const char *name, const char *value)
{
const char *n;
char *p, c;
char low[500];
int is_fs, is_param, is_flag, is_opt, is_undecl;
/*
* Figure out how this option was declared (if at all.)
* XXX should use "params" and "flags" in config.
* XXX crying out for a type field in a unified hashtab.
*/
is_fs = OPT_FSOPT(name);
is_param = OPT_DEFPARAM(name);
is_opt = OPT_DEFOPT(name);
is_flag = OPT_DEFFLAG(name);
is_undecl = !DEFINED_OPTION(name);
/* Make sure this is not a defined file system. */
if (is_fs) {
error("`%s' is a defined file system", name);
return;
}
/* A defparam must have a value */
if (is_param && value == NULL) {
error("option `%s' must have a value", name);
return;
}
/* A defflag must not have a value */
if (is_flag && value != NULL) {
error("option `%s' must not have a value", name);
return;
}
if (is_undecl && vflag) {
warn("undeclared option `%s' added to IDENT", name);
}
if (do_option(opttab, &nextopt, name, value, "options"))
return;
/* make lowercase, then add to select table */
for (n = name, p = low; (c = *n) != '\0'; n++)
*p++ = isupper(c) ? tolower(c) : c;
*p = 0;
n = intern(low);
(void)ht_insert(selecttab, n, (void *)n);
}
void
deloption(const char *name)
{
if (undo_option(opttab, &options, &nextopt, name, "options"))
return;
if (undo_option(selecttab, NULL, NULL, strtolower(name), "options"))
return;
}
/*
* Add a file system option. This routine simply inserts the name into
* a list of valid file systems, which is used to validate the root
* file system type. The name is then treated like a standard option.
*/
void
addfsoption(const char *name)
{
const char *n;
char *p, c;
char low[500];
/* Make sure this is a defined file system. */
if (!OPT_FSOPT(name)) {
error("`%s' is not a defined file system", name);
return;
}
/*
* Convert to lower case. This will be used in the select
* table, to verify root file systems, and when the initial
* VFS list is created.
*/
for (n = name, p = low; (c = *n) != '\0'; n++)
*p++ = isupper(c) ? tolower(c) : c;
*p = 0;
n = intern(low);
if (do_option(fsopttab, &nextfsopt, name, n, "file-system"))
return;
/*
* Add a lower-case version to the table for root file system
* verification.
*/
if (ht_insert(fsopttab, n, (void *)n))
panic("addfsoption: already in table");
/* Add to select table. */
(void)ht_insert(selecttab, n, (void *)n);
}
void
delfsoption(const char *name)
{
const char *n;
n = strtolower(name);
if (undo_option(fsopttab, &fsoptions, &nextfsopt, name, "file-system"))
return;
if (undo_option(fsopttab, NULL, NULL, n, "file-system"))
return;
if (undo_option(selecttab, NULL, NULL, n, "file-system"))
return;
}
/*
* Add a "make" option.
*/
void
addmkoption(const char *name, const char *value)
{
(void)do_option(mkopttab, &nextmkopt, name, value, "makeoptions");
}
void
delmkoption(const char *name)
{
(void)undo_option(mkopttab, &mkoptions, &nextmkopt, name,
"makeoptions");
}
/*
* 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;
/*
* If a defopt'ed or defflag'ed option was enabled but without
* an explicit value (always the case for defflag), supply a
* default value of 1, as for non-defopt options (where cc
* treats -DBAR as -DBAR=1.)
*/
if ((OPT_DEFOPT(name) || OPT_DEFFLAG(name)) && value == NULL)
value = "1";
/* 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 && !OPT_FSOPT(name))
error("already have %s `%s=%s'", type, name, nv->nv_str);
else
error("already have %s `%s'", type, name);
return (1);
}
/*
* Remove a name from a hash table,
* and optionally, a name=value pair from an option list.
*/
static int
undo_option(struct hashtab *ht, struct nvlist **npp,
struct nvlist ***next, const char *name, const char *type)
{
struct nvlist *nv;
if (ht_remove(ht, name)) {
error("%s `%s' is not defined", type, name);
return (1);
}
if (npp == NULL)
return (0);
for ( ; *npp != NULL; npp = &(*npp)->nv_next) {
if ((*npp)->nv_name != name)
continue;
if (next != NULL && *next == &(*npp)->nv_next)
*next = npp;
nv = (*npp)->nv_next;
nvfree(*npp);
*npp = nv;
return (0);
}
panic("%s `%s' is not defined in nvlist", 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;
/*
* Pseudo-devices are a little special. We consider them
* to have instances only if they are both:
*
* 1. Included in this kernel configuration.
*
* 2. Have one or more interface attributes.
*/
if (dev->d_ispseudo) {
struct nvlist *nv;
struct attr *a;
if (ht_lookup(devitab, dev->d_name) == NULL)
return (0);
for (nv = dev->d_attrs; nv != NULL; nv = nv->nv_next) {
a = nv->nv_ptr;
if (a->a_iattr)
return (1);
}
return (0);
}
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 pspec *p;
struct nvlist *nv;
/*
* 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 numebrs) that
* may be able to attach the device.
*/
/* No pspec, no parent (root node). */
if ((p = i->i_pspec) == NULL)
return (0);
/*
* Case (1): A parent was named. Either it's configured, or not.
*/
if (p->p_atdev != NULL)
return (devbase_has_instances(p->p_atdev, p->p_atunit));
/*
* Case (2): No parent was named. Look for devs that provide the attr.
*/
if (p->p_iattr != NULL)
for (nv = p->p_iattr->a_refs; nv != NULL; nv = nv->nv_next)
if (devbase_has_instances(nv->nv_ptr, p->p_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, devunit;
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);
if (has_attr(dev->d_attrs, s_ifnet))
devunit = nv->nv_ifunit; /* XXX XXX XXX */
else
devunit = minor(nv->nv_int) / maxpartitions;
if (devbase_has_instances(dev, devunit))
continue;
if (devbase_has_instances(dev, STAR) &&
devunit >= dev->d_umax)
continue;
TAILQ_FOREACH(pd, &allpseudo, i_next) {
if (pd->i_base == dev && devunit < dev->d_umax &&
devunit >= 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 and dump devices for all configurations are there.
*/
int
crosscheck(void)
{
struct pspec *p;
struct devi *i;
struct config *cf;
int errs;
errs = 0;
TAILQ_FOREACH(i, &alldevi, i_next) {
if ((p = i->i_pspec) == NULL || hasparent(i))
continue;
(void)fprintf(stderr,
"%s:%d: `%s at %s' is orphaned (%s `%s' declared)\n",
conffile, i->i_lineno, i->i_name, i->i_at,
p->p_atunit == WILD ? "nothing matching" : "no",
i->i_at);
}
if (TAILQ_EMPTY(&allcf)) {
(void)fprintf(stderr, "%s has no configurations!\n",
conffile);
errs++;
}
TAILQ_FOREACH(cf, &allcf, cf_next) {
if (cf->cf_root != NULL) { /* i.e., not root on ? */
errs += cfcrosscheck(cf, "root", cf->cf_root);
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;
TAILQ_FOREACH(d, &allbases, 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 aybabtu;
}
continue;
aybabtu:
if (ht_lookup(needcnttab, d->d_name)) {
(void)fprintf(stderr,
"config: %s's cannot be *'d until its driver is fixed\n",
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;
/* 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)) {
(void)fprintf(stderr, "config: cannot create %s: %s\n",
builddir, strerror(errno));
exit(2);
}
} else if (!S_ISDIR(st.st_mode)) {
(void)fprintf(stderr, "config: %s is not a directory\n",
builddir);
exit(2);
}
if (chdir(builddir) != 0) {
(void)fprintf(stderr, "config: cannot change to %s\n",
builddir);
exit(2);
}
if (stat(srcdir, &st) != 0 || !S_ISDIR(st.st_mode)) {
(void)fprintf(stderr, "config: %s is not a directory\n",
srcdir);
exit(2);
}
}
/*
* Write identifier from "ident" directive into file, for
* newvers.sh to pick it up.
*/
int
mkident(void)
{
FILE *fp;
(void)unlink("ident");
if (ident == NULL)
return (0);
if ((fp = fopen("ident", "w")) == NULL) {
(void)fprintf(stderr, "config: cannot write ident: %s\n",
strerror(errno));
return (1);
}
if (vflag)
(void)printf("using ident '%s'\n", ident);
if (fprintf(fp, "%s\n", ident) < 0)
return (1);
(void)fclose(fp);
return (0);
}
void
logconfig_start(void)
{
extern FILE *yyin;
char line[1024];
const char *tmpdir;
struct stat st;
int fd;
if (yyin == NULL || fstat(fileno(yyin), &st) == -1)
return;
cfgtime = st.st_mtime;
tmpdir = getenv("TMPDIR");
if (tmpdir == NULL)
tmpdir = "/tmp";
snprintf(line, sizeof(line), "%s/config.tmp.XXXXXX", tmpdir);
if ((fd = mkstemp(line)) == -1 ||
(cfg = fdopen(fd, "r+")) == NULL) {
if (fd != -1) {
unlink(line);
close(fd);
}
cfg = NULL;
return;
}
unlink(line);
(void)fprintf(cfg, "#include \"opt_config.h\"\n");
(void)fprintf(cfg, "\n");
(void)fprintf(cfg, "/*\n");
(void)fprintf(cfg, " * Add either (or both) of\n");
(void)fprintf(cfg, " *\n");
(void)fprintf(cfg, " *\toptions %s\n", LOGCONFIG_LARGE);
(void)fprintf(cfg, " *\toptions %s\n", LOGCONFIG_SMALL);
(void)fprintf(cfg, " *\n");
(void)fprintf(cfg,
" * to your kernel config file to embed it in the resulting\n");
(void)fprintf(cfg,
" * kernel. The latter option does not include files that are\n");
(void)fprintf(cfg,
" * included (recursively) by your config file. The embedded\n");
(void)fprintf(cfg,
" * data be extracted by using the command:\n");
(void)fprintf(cfg, " *\n");
(void)fprintf(cfg,
" *\tstrings netbsd | sed -n 's/^_CFG_//p' | unvis\n");
(void)fprintf(cfg, " */\n");
(void)fprintf(cfg, "\n");
(void)fprintf(cfg, "#ifdef CONFIG_FILE\n");
(void)fprintf(cfg, "#if defined(%s) || defined(%s)\n\n",
LOGCONFIG_LARGE, LOGCONFIG_SMALL);
(void)fprintf(cfg,
"static const char config[] __attribute__((__unused__)) =\n\n");
(void)fprintf(cfg, "#ifdef %s\n\n", LOGCONFIG_LARGE);
(void)fprintf(cfg, "\"_CFG_### START CONFIG FILE \\\"%s\\\"\\n\"\n\n",
conffile);
(void)fprintf(cfg, "#endif /* %s */\n\n", LOGCONFIG_LARGE);
logconfig_include(yyin, NULL);
(void)fprintf(cfg, "#ifdef %s\n\n", LOGCONFIG_LARGE);
(void)fprintf(cfg, "\"_CFG_### END CONFIG FILE \\\"%s\\\"\\n\"\n",
conffile);
rewind(yyin);
}
void
logconfig_include(FILE *cf, const char *filename)
{
char line[1024], in[2048], *out;
struct stat st;
int missingeol;
if (!cfg)
return;
if (fstat(fileno(cf), &st) == -1)
return;
if (cfgtime < st.st_mtime)
cfgtime = st.st_mtime;
if (filename)
(void)fprintf(cfg,
"\"_CFG_### (included from \\\"%s\\\")\\n\"\n",
filename);
while (fgets(line, sizeof(line), cf) != NULL) {
missingeol = 1;
(void)fprintf(cfg, "\"_CFG_");
if (filename)
(void)fprintf(cfg, "###> ");
strvis(in, line, VIS_TAB);
for (out = in; *out; out++)
switch (*out) {
case '\n':
(void)fprintf(cfg, "\\n\"\n");
missingeol = 0;
break;
case '"': case '\\':
(void)fputc('\\', cfg);
/* FALLTHROUGH */
default:
(void)fputc(*out, cfg);
break;
}
}
if (missingeol) {
(void)fprintf(cfg, "\\n\"\n");
warnx("%s: newline missing at EOF",
filename != NULL ? filename : conffile);
}
if (filename)
(void)fprintf(cfg, "\"_CFG_### (end include \\\"%s\\\")\\n\"\n",
filename);
rewind(cf);
}
void
logconfig_end(void)
{
char line[1024];
FILE *fp;
struct stat st;
if (!cfg)
return;
(void)fprintf(cfg, "#endif /* %s */\n", LOGCONFIG_LARGE);
(void)fprintf(cfg, ";\n");
(void)fprintf(cfg, "#endif /* %s || %s */\n",
LOGCONFIG_LARGE, LOGCONFIG_SMALL);
(void)fprintf(cfg, "#endif /* CONFIG_FILE */\n");
rewind(cfg);
if (stat("config_file.h", &st) != -1) {
if (cfgtime < st.st_mtime) {
fclose(cfg);
return;
}
}
fp = fopen("config_file.h", "w");
if(!fp)
err(1, "Cannot write to \"config_file.h\"");
while (fgets(line, sizeof(line), cfg) != NULL)
fputs(line, fp);
fclose(fp);
fclose(cfg);
}
static const char *
strtolower(const char *name)
{
const char *n;
char *p, c, low[500];
for (n = name, p = low; (c = *n) != '\0'; n++)
*p++ = isupper(c) ? tolower(c) : c;
*p = 0;
return (intern(low));
}
static int
is_elf(const char *file)
{
int kernel;
char hdr[4];
kernel = open(file, O_RDONLY);
if (kernel == -1) {
fprintf(stderr, "config: cannot open %s: %s\n", file,
strerror(errno));
exit(2);
}
if (read(kernel, hdr, 4) == -1) {
fprintf(stderr, "config: cannot read from %s: %s\n", file,
strerror(errno));
exit(2);
}
close(kernel);
return memcmp("\177ELF", hdr, 4) == 0 ? 1 : 0;
}
static int
extract_config(const char *kname, const char *cname, int cfd)
{
char *ptr;
int found, kfd, i;
struct stat st;
found = 0;
/* mmap(2) binary kernel */
kfd = open(conffile, O_RDONLY);
if (kfd == -1) {
fprintf(stderr, "config: cannot open %s: %s\n", kname,
strerror(errno));
exit(2);
}
if ((fstat(kfd, &st) == -1)) {
fprintf(stderr, "config: cannot stat %s: %s\n", kname,
strerror(errno));
exit(2);
}
ptr = (char *)mmap(0, st.st_size, PROT_READ, MAP_FILE | MAP_SHARED,
kfd, 0);
if (ptr == MAP_FAILED) {
fprintf(stderr, "config: cannot mmap %s: %s\n", kname,
strerror(errno));
exit(2);
}
/* Scan mmap(2)'ed region, extracting kernel configuration */
for (i = 0; i < st.st_size; i++) {
if ((*ptr == '_') && (st.st_size - i > 5) && memcmp(ptr,
"_CFG_", 5) == 0) {
/* Line found */
char *oldptr, line[LINE_MAX + 1], uline[LINE_MAX + 1];
int j;
found = 1;
oldptr = (ptr += 5);
while (*ptr != '\n' && *ptr != '\0') ptr++;
if (ptr - oldptr > LINE_MAX) {
fprintf(stderr, "config: line too long\n");
exit(2);
}
i += ptr - oldptr + 5;
memcpy(line, oldptr, (ptr - oldptr));
line[ptr - oldptr] = '\0';
j = strunvis(uline, line);
if (j == -1) {
fprintf(stderr, "config: unvis: invalid "
"encoded sequence\n");
exit(2);
}
uline[j] = '\n';
if (write(cfd, uline, j + 1) == -1) {
fprintf(stderr, "config: cannot write to %s: "
"%s\n", cname, strerror(errno));
exit(2);
}
} else ptr++;
}
close(kfd);
return found;
}
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