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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 | * | |
18 | * $Id: ircd_lexer.l 3540 2007-07-30 17:26:00Z jilles $ | |
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" | |
41 | #include "logger.h" | |
42 | #include "s_conf.h" | |
43 | #include "newconf.h" | |
44 | ||
45 | #include "ircd_parser.h" | |
46 | ||
47 | int yylex(void); | |
48 | ||
49 | #define MAX_INCLUDE_DEPTH 10 | |
50 | ||
51 | YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; | |
52 | int include_stack_ptr=0; | |
53 | int lineno = 1; | |
54 | void ccomment(void); | |
55 | void cinclude(void); | |
56 | void hashcomment(void); | |
57 | int ieof(void); | |
58 | int lineno_stack[MAX_INCLUDE_DEPTH]; | |
59 | char conffile_stack[MAX_INCLUDE_DEPTH][IRCD_BUFSIZE]; | |
60 | char conffilebuf[IRCD_BUFSIZE+1]; | |
61 | char *current_file = conffilebuf; | |
62 | ||
63 | FILE *inc_fbfile_in[MAX_INCLUDE_DEPTH]; | |
64 | ||
65 | char linebuf[512]; | |
66 | ||
67 | #undef YY_INPUT | |
68 | ||
69 | #define YY_FATAL_ERROR(msg) conf_yy_fatal_error(msg) | |
70 | ||
71 | #define YY_INPUT(buf,result,max_size) \ | |
72 | if (!(result = conf_fgets(buf, max_size, conf_fbfile_in))) \ | |
73 | YY_FATAL_ERROR("input in flex scanner failed"); | |
74 | %} | |
75 | ||
76 | ws [ \t]* | |
77 | digit [0-9] | |
78 | comment #.* | |
79 | qstring \"[^\"\n]*[\"\n] | |
80 | string [a-zA-Z_\~\:][a-zA-Z0-9_\:]* | |
81 | include \.include{ws}(\<.*\>|\".*\") | |
82 | ||
83 | %% | |
84 | {include} { cinclude(); } | |
85 | "/*" { ccomment(); } | |
86 | \n.* { strcpy(linebuf, yytext+1); lineno++; yyless(1); } | |
87 | ||
88 | {ws} ; | |
89 | {comment} { hashcomment(); } | |
90 | ||
91 | {digit}+ { yylval.number = atoi(yytext); return NUMBER; } | |
92 | ||
93 | {qstring} { | |
94 | if(yytext[yyleng-2] == '\\') | |
95 | { | |
96 | yyless(yyleng-1); /* return last quote */ | |
97 | yymore(); /* append next string */ | |
98 | } | |
99 | else | |
100 | { | |
101 | strcpy(yylval.string, yytext + 1); | |
102 | if(yylval.string[yyleng-2] != '"') | |
103 | ilog(L_MAIN, "Unterminated character string"); | |
104 | else | |
105 | { | |
106 | int i,j; | |
107 | yylval.string[yyleng-2] = '\0'; /* remove close | |
108 | * quote | |
109 | */ | |
110 | ||
111 | for (j=i=0 ;yylval.string[i] != '\0'; i++,j++) | |
112 | { | |
113 | if (yylval.string[i] != '\\') | |
114 | { | |
115 | yylval.string[j] = yylval.string[i]; | |
116 | } | |
117 | else | |
118 | { | |
119 | i++; | |
120 | if (yylval.string[i] == '\0') /* XXX | |
121 | * should not | |
122 | * happen | |
123 | */ | |
124 | { | |
125 | ilog(L_MAIN, | |
126 | "Unterminated character string"); | |
127 | break; | |
128 | } | |
129 | yylval.string[j] = yylval.string[i]; | |
130 | } | |
131 | } | |
132 | yylval.string[j] = '\0'; | |
133 | return QSTRING; | |
134 | } | |
135 | } | |
136 | } | |
137 | ||
138 | ||
139 | loadmodule { return LOADMODULE; } | |
140 | {string} { | |
141 | strcpy(yylval.string, yytext); | |
142 | yylval.string[yyleng] = '\0'; | |
143 | return STRING; | |
144 | } | |
145 | ||
146 | \.\. { return TWODOTS; } | |
147 | . { return yytext[0]; } | |
148 | <<EOF>> { if (ieof()) yyterminate(); } | |
149 | %% | |
150 | ||
151 | /* C-comment ignoring routine -kre*/ | |
152 | void ccomment() | |
153 | { | |
154 | int c; | |
155 | ||
156 | /* log(L_NOTICE, "got comment"); */ | |
157 | while (1) | |
158 | { | |
159 | while ((c = input()) != '*' && c != EOF) | |
160 | if (c == '\n') ++lineno; | |
161 | if (c == '*') | |
162 | { | |
163 | while ((c = input()) == '*'); | |
164 | if (c == '/') | |
165 | break; | |
166 | if (c == '\n') ++lineno; | |
167 | } | |
168 | if (c == EOF) | |
169 | { | |
170 | YY_FATAL_ERROR("EOF in comment"); | |
171 | /* XXX hack alert this disables | |
172 | * the stupid unused function warning | |
173 | * gcc generates | |
174 | */ | |
175 | yy_fatal_error("EOF in comment"); | |
176 | break; | |
177 | } | |
178 | } | |
179 | } | |
180 | ||
181 | void cinclude(void) | |
182 | { | |
183 | char *c; | |
184 | if ((c = strchr(yytext, '<')) == NULL) | |
185 | *strchr(c = strchr(yytext, '"') + 1, '"') = 0; | |
186 | else | |
187 | *strchr(++c, '>') = 0; | |
188 | ||
189 | /* do stacking and co. */ | |
190 | if (include_stack_ptr >= MAX_INCLUDE_DEPTH) | |
191 | conf_report_error("Includes nested too deep (max is %d)", MAX_INCLUDE_DEPTH); | |
192 | else | |
193 | { | |
194 | FILE *tmp_fbfile_in; | |
195 | ||
196 | tmp_fbfile_in = fopen(c, "r"); | |
197 | ||
198 | if (tmp_fbfile_in == NULL) | |
199 | { | |
200 | /* if its not found in PREFIX, look in ETCPATH */ | |
201 | char fnamebuf[IRCD_BUFSIZE]; | |
202 | ||
203 | snprintf(fnamebuf, sizeof(fnamebuf), "%s/%s", ETCPATH, c); | |
204 | tmp_fbfile_in = fopen(fnamebuf, "r"); | |
205 | ||
206 | /* wasnt found there either.. error. */ | |
207 | if(tmp_fbfile_in == NULL) | |
208 | { | |
209 | conf_report_error("Include %s: %s.", c, strerror(errno)); | |
210 | return; | |
211 | } | |
212 | } | |
213 | lineno_stack[include_stack_ptr] = lineno; | |
214 | lineno = 1; | |
215 | inc_fbfile_in[include_stack_ptr] = conf_fbfile_in; | |
216 | strcpy(conffile_stack[include_stack_ptr], c); | |
217 | current_file = conffile_stack[include_stack_ptr]; | |
218 | include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER; | |
219 | conf_fbfile_in = tmp_fbfile_in; | |
220 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); | |
221 | } | |
222 | } | |
223 | ||
224 | int ieof(void) | |
225 | { | |
226 | if (include_stack_ptr) | |
227 | fclose(conf_fbfile_in); | |
228 | if (--include_stack_ptr < 0) | |
229 | { | |
230 | /* We will now exit the lexer - restore init values if we get /rehash | |
231 | * later and reenter lexer -kre */ | |
232 | include_stack_ptr = 0; | |
233 | lineno = 1; | |
234 | return 1; | |
235 | } | |
236 | /* switch buffer */ | |
237 | yy_delete_buffer(YY_CURRENT_BUFFER); | |
238 | lineno = lineno_stack[include_stack_ptr]; | |
239 | conf_fbfile_in = inc_fbfile_in[include_stack_ptr]; | |
240 | ||
241 | if(include_stack_ptr) | |
242 | current_file = conffile_stack[include_stack_ptr]; | |
243 | else | |
244 | current_file = conffilebuf; | |
245 | ||
246 | yy_switch_to_buffer(include_stack[include_stack_ptr]); | |
247 | return 0; | |
248 | } | |
249 | ||
250 | /* #-comment style, look for #include */ | |
251 | #define INCLUDE "#include" | |
252 | ||
253 | void hashcomment(void) | |
254 | { | |
255 | if (strlen(yytext) < sizeof(INCLUDE) - 1) | |
256 | return; | |
257 | ||
258 | if (!strncasecmp(yytext, INCLUDE, sizeof(INCLUDE) - 1)) | |
259 | yyerror("You probably meant '.include', skipping"); | |
260 | } |