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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 | */ | |
19 | ||
20 | %option case-insensitive | |
21 | %option noyywrap | |
22 | %option nounput | |
23 | ||
24 | %{ | |
25 | #include <sys/types.h> | |
26 | #include <sys/stat.h> | |
27 | ||
28 | #include <string.h> | |
29 | #include <errno.h> | |
30 | #include <limits.h> | |
31 | ||
32 | #define WE_ARE_MEMORY_C | |
33 | ||
34 | #include "stdinc.h" | |
35 | #include "ircd_defs.h" | |
36 | #include "defaults.h" | |
37 | #include "logger.h" | |
38 | #include "s_conf.h" | |
39 | #include "newconf.h" | |
40 | ||
41 | #include "ircd_parser.h" | |
42 | ||
43 | int yylex(void); | |
44 | ||
45 | #define MAX_INCLUDE_DEPTH 10 | |
46 | ||
47 | YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; | |
48 | int include_stack_ptr=0; | |
49 | int lineno = 1; | |
50 | void ccomment(void); | |
51 | void cinclude(void); | |
52 | void hashcomment(void); | |
53 | int ieof(void); | |
54 | int lineno_stack[MAX_INCLUDE_DEPTH]; | |
55 | char conffile_stack[MAX_INCLUDE_DEPTH][BUFSIZE]; | |
56 | char conffilebuf[BUFSIZE+1]; | |
57 | char *current_file = conffilebuf; | |
58 | ||
59 | FILE *inc_fbfile_in[MAX_INCLUDE_DEPTH]; | |
60 | ||
61 | char yy_linebuf[16384]; | |
62 | ||
63 | #undef YY_INPUT | |
64 | ||
65 | #define YY_FATAL_ERROR(msg) conf_yy_fatal_error(msg) | |
66 | ||
67 | #define YY_INPUT(buf,result,max_size) \ | |
68 | if (!(result = conf_fgets(buf, max_size, conf_fbfile_in))) \ | |
69 | YY_FATAL_ERROR("input in flex scanner failed"); | |
70 | %} | |
71 | ||
72 | ws [ \t]* | |
73 | digit [0-9] | |
74 | comment #.* | |
75 | qstring \"[^\"\n]*[\"\n] | |
76 | string [a-zA-Z_\~\:][a-zA-Z0-9_\:]* | |
77 | include \.include{ws}(\<.*\>|\".*\") | |
78 | ||
79 | %% | |
80 | {include} { cinclude(); } | |
81 | "/*" { ccomment(); } | |
82 | \n.* { rb_strlcpy(yy_linebuf, yytext+1, sizeof(yy_linebuf)); lineno++; yyless(1); } | |
83 | ||
84 | {ws} ; | |
85 | {comment} { hashcomment(); } | |
86 | ||
87 | {digit}+ { yylval.number = atoi(yytext); return NUMBER; } | |
88 | ||
89 | {qstring} { | |
90 | if(yytext[yyleng-2] == '\\') | |
91 | { | |
92 | yyless(yyleng-1); /* return last quote */ | |
93 | yymore(); /* append next string */ | |
94 | } | |
95 | else | |
96 | { | |
97 | rb_strlcpy(yylval.string, yytext + 1, 1024); | |
98 | if(yylval.string[yyleng-2] != '"') | |
99 | ilog(L_MAIN, "Unterminated character string"); | |
100 | else | |
101 | { | |
102 | int i,j; | |
103 | yylval.string[yyleng-2] = '\0'; /* remove close | |
104 | * quote | |
105 | */ | |
106 | ||
107 | for (j=i=0 ;yylval.string[i] != '\0'; i++,j++) | |
108 | { | |
109 | if (yylval.string[i] != '\\') | |
110 | { | |
111 | yylval.string[j] = yylval.string[i]; | |
112 | } | |
113 | else | |
114 | { | |
115 | i++; | |
116 | if (yylval.string[i] == '\0') /* XXX | |
117 | * should not | |
118 | * happen | |
119 | */ | |
120 | { | |
121 | ilog(L_MAIN, | |
122 | "Unterminated character string"); | |
123 | break; | |
124 | } | |
125 | yylval.string[j] = yylval.string[i]; | |
126 | } | |
127 | } | |
128 | yylval.string[j] = '\0'; | |
129 | return QSTRING; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | ||
135 | loadmodule { return LOADMODULE; } | |
136 | {string} { | |
137 | rb_strlcpy(yylval.string, yytext, 1024); | |
138 | yylval.string[yyleng] = '\0'; | |
139 | return STRING; | |
140 | } | |
141 | ||
142 | \.\. { return TWODOTS; } | |
143 | . { return yytext[0]; } | |
144 | <<EOF>> { if (ieof()) yyterminate(); } | |
145 | %% | |
146 | ||
147 | /* C-comment ignoring routine -kre*/ | |
148 | void ccomment() | |
149 | { | |
150 | int c; | |
151 | ||
152 | /* log(L_NOTICE, "got comment"); */ | |
153 | while (1) | |
154 | { | |
155 | while ((c = input()) != '*' && c != EOF) | |
156 | if (c == '\n') ++lineno; | |
157 | if (c == '*') | |
158 | { | |
159 | while ((c = input()) == '*'); | |
160 | if (c == '/') | |
161 | break; | |
162 | if (c == '\n') ++lineno; | |
163 | } | |
164 | if (c == EOF) | |
165 | { | |
166 | YY_FATAL_ERROR("EOF in comment"); | |
167 | /* XXX hack alert this disables | |
168 | * the stupid unused function warning | |
169 | * gcc generates | |
170 | */ | |
171 | yy_fatal_error("EOF in comment"); | |
172 | break; | |
173 | } | |
174 | } | |
175 | } | |
176 | ||
177 | void cinclude(void) | |
178 | { | |
179 | char *c; | |
180 | if ((c = strchr(yytext, '<')) == NULL) | |
181 | *strchr(c = strchr(yytext, '"') + 1, '"') = 0; | |
182 | else | |
183 | *strchr(++c, '>') = 0; | |
184 | ||
185 | /* do stacking and co. */ | |
186 | if (include_stack_ptr >= MAX_INCLUDE_DEPTH) | |
187 | conf_report_error("Includes nested too deep (max is %d)", MAX_INCLUDE_DEPTH); | |
188 | else | |
189 | { | |
190 | FILE *tmp_fbfile_in; | |
191 | ||
192 | tmp_fbfile_in = fopen(c, "r"); | |
193 | ||
194 | if (tmp_fbfile_in == NULL) | |
195 | { | |
196 | /* if its not found in PREFIX, look in IRCD_PATH_ETC */ | |
197 | char fnamebuf[BUFSIZE]; | |
198 | ||
199 | snprintf(fnamebuf, sizeof(fnamebuf), "%s%c%s", ircd_paths[IRCD_PATH_ETC], RB_PATH_SEPARATOR, c); | |
200 | tmp_fbfile_in = fopen(fnamebuf, "r"); | |
201 | ||
202 | /* wasnt found there either.. error. */ | |
203 | if(tmp_fbfile_in == NULL) | |
204 | { | |
205 | conf_report_error("Include %s: %s.", c, strerror(errno)); | |
206 | return; | |
207 | } | |
208 | } | |
209 | lineno_stack[include_stack_ptr] = lineno; | |
210 | lineno = 1; | |
211 | inc_fbfile_in[include_stack_ptr] = conf_fbfile_in; | |
212 | strcpy(conffile_stack[include_stack_ptr], c); | |
213 | current_file = conffile_stack[include_stack_ptr]; | |
214 | include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER; | |
215 | conf_fbfile_in = tmp_fbfile_in; | |
216 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); | |
217 | } | |
218 | } | |
219 | ||
220 | int ieof(void) | |
221 | { | |
222 | if (include_stack_ptr) | |
223 | fclose(conf_fbfile_in); | |
224 | if (--include_stack_ptr < 0) | |
225 | { | |
226 | /* We will now exit the lexer - restore init values if we get /rehash | |
227 | * later and reenter lexer -kre */ | |
228 | include_stack_ptr = 0; | |
229 | lineno = 1; | |
230 | return 1; | |
231 | } | |
232 | /* switch buffer */ | |
233 | yy_delete_buffer(YY_CURRENT_BUFFER); | |
234 | lineno = lineno_stack[include_stack_ptr]; | |
235 | conf_fbfile_in = inc_fbfile_in[include_stack_ptr]; | |
236 | ||
237 | if(include_stack_ptr) | |
238 | current_file = conffile_stack[include_stack_ptr]; | |
239 | else | |
240 | current_file = conffilebuf; | |
241 | ||
242 | yy_switch_to_buffer(include_stack[include_stack_ptr]); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | /* #-comment style, look for #include */ | |
247 | #define INCLUDE "#include" | |
248 | ||
249 | void hashcomment(void) | |
250 | { | |
251 | if (strlen(yytext) < sizeof(INCLUDE) - 1) | |
252 | return; | |
253 | ||
254 | if (!rb_strncasecmp(yytext, INCLUDE, sizeof(INCLUDE) - 1)) | |
255 | yyerror("You probably meant '.include', skipping"); | |
256 | } |