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212380e3 AC |
1 | /* src/ircd_lexer.l |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2 of the License, or | |
6 | * (at your option) any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
16 | * USA | |
17 | * | |
4f3f411b | 18 | * $Id: ircd_lexer.l 3540 2007-07-30 17:26:00Z jilles $ |
212380e3 AC |
19 | */ |
20 | ||
21 | %option case-insensitive | |
22 | %option noyywrap | |
23 | %option nounput | |
24 | ||
25 | %{ | |
26 | #include <sys/types.h> | |
27 | #include <sys/stat.h> | |
28 | ||
29 | #include <netinet/in.h> | |
30 | ||
31 | #include <string.h> | |
32 | #include <errno.h> | |
33 | #include <limits.h> | |
34 | ||
35 | #define WE_ARE_MEMORY_C | |
36 | ||
37 | #include "stdinc.h" | |
38 | #include "ircd_defs.h" | |
39 | #include "common.h" | |
40 | #include "config.h" | |
93a426cb | 41 | #include "logger.h" |
212380e3 AC |
42 | #include "s_conf.h" |
43 | #include "newconf.h" | |
44 | ||
45 | #include "y.tab.h" | |
46 | ||
47 | int yylex(void); | |
48 | ||
49 | /* here to fixup gcc 3.3 errors */ | |
50 | int yyget_lineno(void); | |
51 | FILE *yyget_in(void); | |
52 | FILE *yyget_out(void); | |
53 | int yyget_leng(void); | |
54 | char *yyget_text(void); | |
55 | void yyset_lineno(int line_number); | |
56 | void yyset_in(FILE * in_str); | |
57 | void yyset_out(FILE * out_str); | |
58 | int yyget_debug(void); | |
59 | void yyset_debug(int bdebug); | |
60 | int yylex_destroy(void); | |
61 | ||
62 | ||
63 | #define MAX_INCLUDE_DEPTH 10 | |
64 | ||
65 | YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; | |
66 | int include_stack_ptr=0; | |
67 | int lineno = 1; | |
68 | void ccomment(void); | |
69 | void cinclude(void); | |
70 | void hashcomment(void); | |
71 | int ieof(void); | |
72 | int lineno_stack[MAX_INCLUDE_DEPTH]; | |
73 | char conffile_stack[MAX_INCLUDE_DEPTH][IRCD_BUFSIZE]; | |
74 | char conffilebuf[IRCD_BUFSIZE+1]; | |
75 | char *current_file = conffilebuf; | |
76 | ||
77 | FILE *inc_fbfile_in[MAX_INCLUDE_DEPTH]; | |
78 | ||
79 | char linebuf[512]; | |
80 | ||
81 | #undef YY_INPUT | |
82 | ||
83 | #define YY_FATAL_ERROR(msg) conf_yy_fatal_error(msg) | |
84 | ||
85 | #define YY_INPUT(buf,result,max_size) \ | |
86 | if (!(result = conf_fgets(buf, max_size, conf_fbfile_in))) \ | |
87 | YY_FATAL_ERROR("input in flex scanner failed"); | |
88 | %} | |
89 | ||
90 | ws [ \t]* | |
91 | digit [0-9] | |
92 | comment #.* | |
93 | qstring \"[^\"\n]*[\"\n] | |
94 | string [a-zA-Z_\~][a-zA-Z0-9_]* | |
95 | include \.include{ws}(\<.*\>|\".*\") | |
96 | ||
97 | %% | |
98 | {include} { cinclude(); } | |
99 | "/*" { ccomment(); } | |
100 | \n.* { strcpy(linebuf, yytext+1); lineno++; yyless(1); } | |
101 | ||
102 | {ws} ; | |
103 | {comment} { hashcomment(); } | |
104 | ||
105 | {digit}+ { yylval.number = atoi(yytext); return NUMBER; } | |
106 | ||
107 | {qstring} { | |
108 | if(yytext[yyleng-2] == '\\') | |
109 | { | |
110 | yyless(yyleng-1); /* return last quote */ | |
111 | yymore(); /* append next string */ | |
112 | } | |
113 | else | |
114 | { | |
115 | strcpy(yylval.string, yytext + 1); | |
116 | if(yylval.string[yyleng-2] != '"') | |
117 | ilog(L_MAIN, "Unterminated character string"); | |
118 | else | |
119 | { | |
120 | int i,j; | |
121 | yylval.string[yyleng-2] = '\0'; /* remove close | |
122 | * quote | |
123 | */ | |
124 | ||
125 | for (j=i=0 ;yylval.string[i] != '\0'; i++,j++) | |
126 | { | |
127 | if (yylval.string[i] != '\\') | |
128 | { | |
129 | yylval.string[j] = yylval.string[i]; | |
130 | } | |
131 | else | |
132 | { | |
133 | i++; | |
134 | if (yylval.string[i] == '\0') /* XXX | |
135 | * should not | |
136 | * happen | |
137 | */ | |
138 | { | |
139 | ilog(L_MAIN, | |
140 | "Unterminated character string"); | |
141 | break; | |
142 | } | |
143 | yylval.string[j] = yylval.string[i]; | |
144 | } | |
145 | } | |
146 | yylval.string[j] = '\0'; | |
147 | return QSTRING; | |
148 | } | |
149 | } | |
150 | } | |
151 | ||
152 | ||
153 | loadmodule { return LOADMODULE; } | |
154 | {string} { | |
155 | strcpy(yylval.string, yytext); | |
156 | yylval.string[yyleng] = '\0'; | |
157 | return STRING; | |
158 | } | |
159 | ||
160 | \.\. { return TWODOTS; } | |
161 | . { return yytext[0]; } | |
162 | <<EOF>> { if (ieof()) yyterminate(); } | |
163 | %% | |
164 | ||
165 | /* C-comment ignoring routine -kre*/ | |
166 | void ccomment() | |
167 | { | |
168 | int c; | |
169 | ||
170 | /* log(L_NOTICE, "got comment"); */ | |
171 | while (1) | |
172 | { | |
173 | while ((c = input()) != '*' && c != EOF) | |
174 | if (c == '\n') ++lineno; | |
175 | if (c == '*') | |
176 | { | |
177 | while ((c = input()) == '*'); | |
178 | if (c == '/') | |
179 | break; | |
4f3f411b | 180 | if (c == '\n') ++lineno; |
212380e3 AC |
181 | } |
182 | if (c == EOF) | |
183 | { | |
184 | YY_FATAL_ERROR("EOF in comment"); | |
185 | /* XXX hack alert this disables | |
186 | * the stupid unused function warning | |
187 | * gcc generates | |
188 | */ | |
189 | yy_fatal_error("EOF in comment"); | |
190 | break; | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | void cinclude(void) | |
196 | { | |
197 | char *c; | |
198 | if ((c = strchr(yytext, '<')) == NULL) | |
199 | *strchr(c = strchr(yytext, '"') + 1, '"') = 0; | |
200 | else | |
201 | *strchr(++c, '>') = 0; | |
202 | ||
203 | /* do stacking and co. */ | |
204 | if (include_stack_ptr >= MAX_INCLUDE_DEPTH) | |
205 | conf_report_error("Includes nested too deep (max is %d)", MAX_INCLUDE_DEPTH); | |
206 | else | |
207 | { | |
208 | FILE *tmp_fbfile_in; | |
209 | ||
210 | tmp_fbfile_in = fopen(c, "r"); | |
211 | ||
212 | if (tmp_fbfile_in == NULL) | |
213 | { | |
214 | /* if its not found in PREFIX, look in ETCPATH */ | |
215 | char fnamebuf[IRCD_BUFSIZE]; | |
216 | ||
217 | snprintf(fnamebuf, sizeof(fnamebuf), "%s/%s", ETCPATH, c); | |
218 | tmp_fbfile_in = fopen(fnamebuf, "r"); | |
219 | ||
220 | /* wasnt found there either.. error. */ | |
221 | if(tmp_fbfile_in == NULL) | |
222 | { | |
223 | conf_report_error("Include %s: %s.", c, strerror(errno)); | |
224 | return; | |
225 | } | |
226 | } | |
227 | lineno_stack[include_stack_ptr] = lineno; | |
228 | lineno = 1; | |
229 | inc_fbfile_in[include_stack_ptr] = conf_fbfile_in; | |
230 | strcpy(conffile_stack[include_stack_ptr], c); | |
231 | current_file = conffile_stack[include_stack_ptr]; | |
232 | include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER; | |
233 | conf_fbfile_in = tmp_fbfile_in; | |
234 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); | |
235 | } | |
236 | } | |
237 | ||
238 | int ieof(void) | |
239 | { | |
240 | if (include_stack_ptr) | |
241 | fclose(conf_fbfile_in); | |
242 | if (--include_stack_ptr < 0) | |
243 | { | |
244 | /* We will now exit the lexer - restore init values if we get /rehash | |
245 | * later and reenter lexer -kre */ | |
246 | include_stack_ptr = 0; | |
247 | lineno = 1; | |
248 | return 1; | |
249 | } | |
250 | /* switch buffer */ | |
251 | yy_delete_buffer(YY_CURRENT_BUFFER); | |
252 | lineno = lineno_stack[include_stack_ptr]; | |
253 | conf_fbfile_in = inc_fbfile_in[include_stack_ptr]; | |
254 | ||
255 | if(include_stack_ptr) | |
256 | current_file = conffile_stack[include_stack_ptr]; | |
257 | else | |
258 | current_file = conffilebuf; | |
259 | ||
260 | yy_switch_to_buffer(include_stack[include_stack_ptr]); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | /* #-comment style, look for #include */ | |
265 | #define INCLUDE "#include" | |
266 | ||
267 | void hashcomment(void) | |
268 | { | |
269 | if (strlen(yytext) < sizeof(INCLUDE) - 1) | |
270 | return; | |
271 | ||
272 | if (!strncasecmp(yytext, INCLUDE, sizeof(INCLUDE) - 1)) | |
273 | yyerror("You probably meant '.include', skipping"); | |
274 | } |