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dnl userv - lexer.l.m4
dnl lexer, passed through m4 with defs from langauge.i4
/*
* Copyright (C)1996-1997 Ian Jackson
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with userv; if not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
%{
include(language.i4)
#include <syslog.h>
#include <assert.h>
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <fnmatch.h>
#include <limits.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <errno.h>
#include "config.h"
#include "common.h"
#include "daemon.h"
#include "lib.h"
#include "tokens.h"
#define HYPHEN '-'
typedef int directive_fnt(int dtoken);
static directive_fnt df_reject, df_execute, df_executefrompath;
static directive_fnt df_executefromdirectory, df_executebuiltin;
static directive_fnt df_errorstostderr, df_errorstosyslog, df_errorstofile;
static directive_fnt dfg_fdwant, dfg_setflag;
static directive_fnt df_reset, df_cd, df_userrcfile, df_include;
static directive_fnt df_includelookup, df_includedirectory;
static directive_fnt df_message, df_error, df_quit, df_eof;
static directive_fnt df_if, df_catchquit, df_errorspush;
static directive_fnt dfi_includeuserrcfile, dfi_includeclientconfig;
/* directive functions return:
* 0 for success having scanned up to and including end of line but not beyond,
* or tokv_error or tokv_quit.
* They expect to parse the whitespace before their parameters (if any).
*/
typedef int parmcondition_fnt(int ctoken, char *const *parmvalues, int *rtrue);
static parmcondition_fnt pcf_glob, pcf_range, pcf_grep;
/* all conditional functions return tokv_error for failure or 0 for success
* at parsing and testing, in which case *rtrue is set to 0 or 1.
* On success they have scanned up to and including the condition's
* terminating newline; the pcf_... functions expect to parse the whitespace
* between the parameter name and the condition's arguments.
* Otherwise they return tokv_error.
* The parameter-based conditionals take a list of parameter values
* as obtained from the parameter functions and pa_parameter,
* and do _not_ free it.
*/
typedef int parameter_fnt(int ptoken, char ***rvalues);
static parameter_fnt pf_service;
static parameter_fnt pf_callinguser, pf_serviceuser;
static parameter_fnt pf_callinggroup, pf_servicegroup;
static parameter_fnt pf_callingusershell, pf_serviceusershell;
/* Parameter functions return tokv_error or 0 for success at parsing
* and determining the value, in which case *rvalues is made to be
* a mallocd null-terminated array of pointers to mallocd strings.
* freeparm can be used to free such an array.
*/
typedef int builtinserviceparse_fnt(char ***rnewargs);
static builtinserviceparse_fnt bispa_none, bispa_parameter;
/* These parse the arguments to a builtin service, including the
* newline at the end of the line. *rnewargs will initially be
* null, indicating that no arguments are to be set; the function
* may store a mallocd array of mallocd strings in it,
* containing the arguments it wishes to have set (null-pointer
* terminated).
*/
static int yylex(void);
/* Returns a token (which may be an eof or error exception) */
static directive_fnt *lr_dir;
static parmcondition_fnt *lr_parmcond;
static builtinserviceparse_fnt *lr_bispa;
static builtinserviceexec_fnt *lr_bisexec;
static parameter_fnt *lr_parameter;
static int lr_loglevel, lr_logfacility, lr_min, lr_max, *lr_flag;
static int lr_flagval, lr_controlend;
static int lr_fdwant_readwrite; /* -1=never, 0=opt, 1=always */
/* Forward declarations of things used in lexer and parser */
struct parser_state {
int lineno, reportlineno, notedreferer, isinternal;
const char *filename;
struct stat filestab;
YY_BUFFER_STATE ybuf;
struct parser_state *upstate;
};
static struct parser_state *cstate;
struct error_handling {
int handling; /* One of the error handling modes tokt_ehandlemode */
int logfacility, loglevel;
int filekeep; /* File is in use by higher-level errors-push, leave it open */
FILE *file;
char *filename;
};
static struct error_handling eh = { tokv_word_errorstostderr, 0,0,0,0,0 };
static int dequote(char *inplace);
#define YY_NO_UNPUT
%}
%option noyywrap
%%
dnl simple words
undivert(3)
changequote({*,*})
{*
[0-9]{1,8} {
char *ep;
lr_min=lr_max= (int)strtoul(yytext,&ep,10);
assert(!*ep);
return tokv_ordinal;
}
[0-9]{1,8}-[0-9]{1,8} {
char *ep;
lr_min= (int)strtoul(yytext,&ep,10);
assert(*ep == HYPHEN);
assert(*++ep);
lr_max= (int)strtoul(ep,&ep,10);
assert(!*ep);
if (lr_max < lr_min) {
parseerrprint("fd range has min > max");
return tokv_error;
}
return tokv_fdrange;
}
[0-9]{1,8}- {
char *ep;
lr_min= (int)strtoul(yytext,&ep,10);
assert(*ep == HYPHEN);
assert(!*++ep);
lr_max=-1;
return tokv_fdstoend;
}
[\ \t]+ return tokv_lwsp;
[\ \t]*\n cstate->lineno++; return tokv_newline;
[\ \t]*\#[^\n]*\n cstate->lineno++; return tokv_newline;
[\ \t]*\#[^\n]* {
parseerrprint("missing newline at eof after comment");
return tokv_error;
}
\"([^\\\"\n]|\\[a-z]|\\[0-9]{3}|\\x[0-9A-Fa-f]{2}|\\[[:punct:]]|\\[ \t]*\n)*\" {
return dequote(yytext);
}
\".* {
parseerrprint("misquoted or unterminated string");
return tokv_error;
}
[^\ \t\n]+ return tokv_barestring;
<<EOF>> return tokv_eof;
*}
changequote(`,')
%%
`
#include "parser.c"
'
divert(-1)
undivert
|
