freebsd-skq/usr.sbin/config/lang.l

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%{
/*-
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
* 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.
*
* @(#)lang.l 8.1 (Berkeley) 6/6/93
* $FreeBSD$
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*/
#include <assert.h>
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#include <ctype.h>
#include <err.h>
#include <string.h>
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#include "y.tab.h"
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#include "config.h"
/*
* Data for returning to previous files from include files.
*/
struct incl {
struct incl *in_prev; /* previous includes in effect, if any */
YY_BUFFER_STATE in_buf; /* previous lex state */
const char *in_fname; /* previous file name */
int in_lineno; /* previous line number */
int in_ateof; /* token to insert at EOF */
};
static struct incl *inclp;
static const char *lastfile;
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/*
* Key word table
*/
struct kt {
const char *kt_name;
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int kt_val;
} key_words[] = {
{ "config", CONFIG },
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{ "cpu", CPU },
{ "nocpu", NOCPU },
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{ "device", DEVICE },
{ "devices", DEVICE },
{ "nodevice", NODEVICE },
{ "nodevices", NODEVICE },
{ "env", ENV },
Borrow phk's axe and apply the next stage of config(8)'s evolution. Use Warner Losh's "hint" driver to decode ascii strings to fill the resource table at boot time. config(8) no longer generates an ioconf.c table - ie: the configuration no longer has to be compiled into the kernel. You can reconfigure your isa devices with the likes of this at loader(8) time: set hint.ed.0.port=0x320 userconfig will be rewritten to use this style interface one day and will move to /boot/userconfig.4th or something like that. It is still possible to statically compile in a set of hints into a kernel if you do not wish to use loader(8). See the "hints" directive in GENERIC as an example. All device wiring has been moved out of config(8). There is a set of helper scripts (see i386/conf/gethints.pl, and the same for alpha and pc98) that extract the 'at isa? port foo irq bar' from the old files and produces a hints file. If you install this file as /boot/device.hints (and update /boot/defaults/loader.conf - You can do a build/install in sys/boot) then loader will load it automatically for you. You can also compile in the hints directly with: hints "device.hints" as well. There are a few things that I'm not too happy with yet. Under this scheme, things like LINT would no longer be useful as "documentation" of settings. I have renamed this file to 'NOTES' and stored the example hints strings in it. However... this is not something that config(8) understands, so there is a script that extracts the build-specific data from the documentation file (NOTES) to produce a LINT that can be config'ed and built. A stack of man4 pages will need updating. :-/ Also, since there is no longer a difference between 'device' and 'pseudo-device' I collapsed the two together, and the resulting 'device' takes a 'number of units' for devices that still have it statically allocated. eg: 'device fe 4' will compile the fe driver with NFE set to 4. You can then set hints for 4 units (0 - 3). Also note that 'device fe0' will be interpreted as "zero units of 'fe'" which would be bad, so there is a config warning for this. This is only needed for old drivers that still have static limits on numbers of units. All the statically limited drivers that I could find were marked. Please exercise EXTREME CAUTION when transitioning! Moral support by: phk, msmith, dfr, asmodai, imp, and others
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{ "hints", HINTS },
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{ "ident", IDENT },
{ "machine", ARCH }, /* MACHINE is defined in /sys/param.h */
{ "makeoption", MAKEOPTIONS },
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{ "makeoptions", MAKEOPTIONS },
{ "nomakeoption", NOMAKEOPTION },
{ "nomakeoptions", NOMAKEOPTION },
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{ "maxusers", MAXUSERS },
{ "profile", PROFILE },
{ "option", OPTIONS },
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{ "options", OPTIONS },
{ "nooption", NOOPTION },
{ "nooptions", NOOPTION },
{ "include", INCLUDE },
{ "files", FILES },
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{ 0, 0 },
};
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static int endinclude(void);
int include(const char *, int);
Borrow phk's axe and apply the next stage of config(8)'s evolution. Use Warner Losh's "hint" driver to decode ascii strings to fill the resource table at boot time. config(8) no longer generates an ioconf.c table - ie: the configuration no longer has to be compiled into the kernel. You can reconfigure your isa devices with the likes of this at loader(8) time: set hint.ed.0.port=0x320 userconfig will be rewritten to use this style interface one day and will move to /boot/userconfig.4th or something like that. It is still possible to statically compile in a set of hints into a kernel if you do not wish to use loader(8). See the "hints" directive in GENERIC as an example. All device wiring has been moved out of config(8). There is a set of helper scripts (see i386/conf/gethints.pl, and the same for alpha and pc98) that extract the 'at isa? port foo irq bar' from the old files and produces a hints file. If you install this file as /boot/device.hints (and update /boot/defaults/loader.conf - You can do a build/install in sys/boot) then loader will load it automatically for you. You can also compile in the hints directly with: hints "device.hints" as well. There are a few things that I'm not too happy with yet. Under this scheme, things like LINT would no longer be useful as "documentation" of settings. I have renamed this file to 'NOTES' and stored the example hints strings in it. However... this is not something that config(8) understands, so there is a script that extracts the build-specific data from the documentation file (NOTES) to produce a LINT that can be config'ed and built. A stack of man4 pages will need updating. :-/ Also, since there is no longer a difference between 'device' and 'pseudo-device' I collapsed the two together, and the resulting 'device' takes a 'number of units' for devices that still have it statically allocated. eg: 'device fe 4' will compile the fe driver with NFE set to 4. You can then set hints for 4 units (0 - 3). Also note that 'device fe0' will be interpreted as "zero units of 'fe'" which would be bad, so there is a config warning for this. This is only needed for old drivers that still have static limits on numbers of units. All the statically limited drivers that I could find were marked. Please exercise EXTREME CAUTION when transitioning! Moral support by: phk, msmith, dfr, asmodai, imp, and others
2000-06-13 22:28:50 +00:00
int kw_lookup(char *);
unsigned int octal(const char *);
unsigned int hex(const char *);
int yyerror(const char *);
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#define YY_DECL int yylex(void)
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%}
%option nounput
%option noinput
ID [A-Za-z_][-A-Za-z_0-9]*
PATH [./][-/.%^A-Za-z_0-9]+
%START TOEOL
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%%
{ID} {
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int i;
BEGIN 0;
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if ((i = kw_lookup(yytext)) == -1)
{
yylval.str = strdup(yytext);
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return ID;
}
return i;
}
\\\"[^"]+\\\" {
BEGIN 0;
yytext[yyleng-2] = '"';
yytext[yyleng-1] = '\0';
yylval.str = strdup(yytext + 1);
return ID;
}
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\"[^"]+\" {
BEGIN 0;
yytext[yyleng-1] = '\0';
yylval.str = strdup(yytext + 1);
return ID;
}
<TOEOL>[^# \t\n]* {
BEGIN 0;
yylval.str = strdup(yytext);
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return ID;
}
0[0-7]* {
yylval.val = octal(yytext);
return NUMBER;
}
0x[0-9a-fA-F]+ {
yylval.val = hex(yytext);
return NUMBER;
}
-?[1-9][0-9]* {
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yylval.val = atoi(yytext);
return NUMBER;
}
"?" {
yylval.val = -1;
return NUMBER;
}
\n/[ \t] {
yyline++;
}
\n {
yyline++;
return SEMICOLON;
}
#.* { /* Ignored (comment) */; }
[ \t\f]* { /* Ignored (white space) */; }
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";" { return SEMICOLON; }
"," { return COMMA; }
"=" { BEGIN TOEOL; return EQUALS; }
"+=" { BEGIN TOEOL; return PLUSEQUALS; }
<<EOF>> {
int tok;
if (inclp == NULL)
return YY_NULL;
tok = endinclude();
if (tok != 0)
return tok;
/* otherwise continue scanning */
}
{PATH} {
BEGIN 0;
yylval.str = strdup(yytext);
return PATH;
}
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. { return yytext[0]; }
%%
/*
* kw_lookup
* Look up a string in the keyword table. Returns a -1 if the
* string is not a keyword otherwise it returns the keyword number
*/
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int
Borrow phk's axe and apply the next stage of config(8)'s evolution. Use Warner Losh's "hint" driver to decode ascii strings to fill the resource table at boot time. config(8) no longer generates an ioconf.c table - ie: the configuration no longer has to be compiled into the kernel. You can reconfigure your isa devices with the likes of this at loader(8) time: set hint.ed.0.port=0x320 userconfig will be rewritten to use this style interface one day and will move to /boot/userconfig.4th or something like that. It is still possible to statically compile in a set of hints into a kernel if you do not wish to use loader(8). See the "hints" directive in GENERIC as an example. All device wiring has been moved out of config(8). There is a set of helper scripts (see i386/conf/gethints.pl, and the same for alpha and pc98) that extract the 'at isa? port foo irq bar' from the old files and produces a hints file. If you install this file as /boot/device.hints (and update /boot/defaults/loader.conf - You can do a build/install in sys/boot) then loader will load it automatically for you. You can also compile in the hints directly with: hints "device.hints" as well. There are a few things that I'm not too happy with yet. Under this scheme, things like LINT would no longer be useful as "documentation" of settings. I have renamed this file to 'NOTES' and stored the example hints strings in it. However... this is not something that config(8) understands, so there is a script that extracts the build-specific data from the documentation file (NOTES) to produce a LINT that can be config'ed and built. A stack of man4 pages will need updating. :-/ Also, since there is no longer a difference between 'device' and 'pseudo-device' I collapsed the two together, and the resulting 'device' takes a 'number of units' for devices that still have it statically allocated. eg: 'device fe 4' will compile the fe driver with NFE set to 4. You can then set hints for 4 units (0 - 3). Also note that 'device fe0' will be interpreted as "zero units of 'fe'" which would be bad, so there is a config warning for this. This is only needed for old drivers that still have static limits on numbers of units. All the statically limited drivers that I could find were marked. Please exercise EXTREME CAUTION when transitioning! Moral support by: phk, msmith, dfr, asmodai, imp, and others
2000-06-13 22:28:50 +00:00
kw_lookup(char *word)
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{
Borrow phk's axe and apply the next stage of config(8)'s evolution. Use Warner Losh's "hint" driver to decode ascii strings to fill the resource table at boot time. config(8) no longer generates an ioconf.c table - ie: the configuration no longer has to be compiled into the kernel. You can reconfigure your isa devices with the likes of this at loader(8) time: set hint.ed.0.port=0x320 userconfig will be rewritten to use this style interface one day and will move to /boot/userconfig.4th or something like that. It is still possible to statically compile in a set of hints into a kernel if you do not wish to use loader(8). See the "hints" directive in GENERIC as an example. All device wiring has been moved out of config(8). There is a set of helper scripts (see i386/conf/gethints.pl, and the same for alpha and pc98) that extract the 'at isa? port foo irq bar' from the old files and produces a hints file. If you install this file as /boot/device.hints (and update /boot/defaults/loader.conf - You can do a build/install in sys/boot) then loader will load it automatically for you. You can also compile in the hints directly with: hints "device.hints" as well. There are a few things that I'm not too happy with yet. Under this scheme, things like LINT would no longer be useful as "documentation" of settings. I have renamed this file to 'NOTES' and stored the example hints strings in it. However... this is not something that config(8) understands, so there is a script that extracts the build-specific data from the documentation file (NOTES) to produce a LINT that can be config'ed and built. A stack of man4 pages will need updating. :-/ Also, since there is no longer a difference between 'device' and 'pseudo-device' I collapsed the two together, and the resulting 'device' takes a 'number of units' for devices that still have it statically allocated. eg: 'device fe 4' will compile the fe driver with NFE set to 4. You can then set hints for 4 units (0 - 3). Also note that 'device fe0' will be interpreted as "zero units of 'fe'" which would be bad, so there is a config warning for this. This is only needed for old drivers that still have static limits on numbers of units. All the statically limited drivers that I could find were marked. Please exercise EXTREME CAUTION when transitioning! Moral support by: phk, msmith, dfr, asmodai, imp, and others
2000-06-13 22:28:50 +00:00
struct kt *kp;
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for (kp = key_words; kp->kt_name != 0; kp++)
if (eq(word, kp->kt_name))
return kp->kt_val;
return -1;
}
/*
* Number conversion routines
*/
unsigned int
octal(const char *str)
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{
unsigned int num;
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(void) sscanf(str, "%o", &num);
return num;
}
unsigned int
hex(const char *str)
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{
unsigned int num;
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(void) sscanf(str+2, "%x", &num);
return num;
}
void
cfgfile_add(const char *fname)
{
struct cfgfile *cf;
cf = calloc(1, sizeof(*cf));
if (cf == NULL)
err(EXIT_FAILURE, "calloc");
assert(cf != NULL);
asprintf(&cf->cfg_path, "%s", fname);
STAILQ_INSERT_TAIL(&cfgfiles, cf, cfg_next);
}
void
cfgfile_removeall(void)
{
struct cfgfile *cf;
while (!STAILQ_EMPTY(&cfgfiles)) {
cf = STAILQ_FIRST(&cfgfiles);
STAILQ_REMOVE_HEAD(&cfgfiles, cfg_next);
if (cf->cfg_path != NULL)
free(cf->cfg_path);
free(cf);
}
}
/*
* Open the named file for inclusion at the current point. Returns 0 on
* success (file opened and previous state pushed), nonzero on failure
* (fopen failed, complaint made). The `ateof' parameter controls the
* token to be inserted at the end of the include file. If ateof == 0,
* then nothing is inserted.
*/
int
include(const char *fname, int ateof)
{
FILE *fp;
struct incl *in;
char *fnamebuf;
fnamebuf = NULL;
fp = fopen(fname, "r");
if (fp == NULL && fname[0] != '.' && fname[0] != '/') {
asprintf(&fnamebuf, "../../conf/%s", fname);
if (fnamebuf != NULL) {
fp = fopen(fnamebuf, "r");
free(fnamebuf);
}
}
if (fp == NULL) {
yyerror("cannot open included file");
return (-1);
}
cfgfile_add(fnamebuf == NULL ? fname : fnamebuf);
in = malloc(sizeof(*in));
assert(in != NULL);
in->in_prev = inclp;
in->in_buf = YY_CURRENT_BUFFER;
in->in_fname = yyfile;
in->in_lineno = yyline;
in->in_ateof = ateof;
inclp = in;
yy_switch_to_buffer(yy_create_buffer(fp, YY_BUF_SIZE));
yyfile = fname;
yyline = 0;
return (0);
}
/*
* Terminate the most recent inclusion.
*/
static int
endinclude(void)
{
struct incl *in;
int ateof;
in = inclp;
assert(in != NULL);
inclp = in->in_prev;
lastfile = yyfile;
yy_delete_buffer(YY_CURRENT_BUFFER);
(void)fclose(yyin);
yy_switch_to_buffer(in->in_buf);
yyfile = in->in_fname;
yyline = in->in_lineno;
ateof = in->in_ateof;
free(in);
return (ateof);
}