Commit | Line | Data |
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c215a4bc IJ |
1 | /* |
2 | * This file is part of secnet. | |
3 | * See README for full list of copyright holders. | |
4 | * | |
5 | * secnet is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version d of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * secnet is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * version 3 along with secnet; if not, see | |
17 | * https://www.gnu.org/licenses/gpl.html. | |
18 | */ | |
2fe58dfd SE |
19 | /* the "incl" state is used for picking up the name of an include file */ |
20 | %x incl | |
21 | ||
b8dc47dd IJ |
22 | %option nounput |
23 | %option noinput | |
f0fb73c5 | 24 | %option never-interactive |
b8dc47dd | 25 | |
2fe58dfd | 26 | %{ |
59230b9b IJ |
27 | #include <assert.h> |
28 | #include <limits.h> | |
2fe58dfd SE |
29 | #include <stdio.h> |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
32 | ||
33 | #include "conffile_internal.h" | |
34 | #include "conffile.tab.h" | |
35 | #include "util.h" | |
36 | ||
558fa3fb SE |
37 | #define YY_NO_UNPUT |
38 | ||
4f5e39ec SE |
39 | #define YY_INPUT(buf,result,max_size) \ |
40 | do{ \ | |
41 | (result)= fread((buf),1,(max_size),yyin); \ | |
42 | if (ferror(yyin)) \ | |
43 | fatal_perror("Error reading configuration file (%s)", \ | |
44 | config_file); \ | |
45 | }while(0) | |
46 | ||
2fe58dfd | 47 | #define MAX_INCLUDE_DEPTH 10 |
974d0468 SE |
48 | struct include_stack_item { |
49 | YY_BUFFER_STATE bst; | |
3f36eb5f | 50 | int lineno; |
fe5e9cc4 | 51 | cstring_t file; |
974d0468 SE |
52 | }; |
53 | struct include_stack_item include_stack[MAX_INCLUDE_DEPTH]; | |
2fe58dfd SE |
54 | int include_stack_ptr=0; |
55 | ||
1caa23ff | 56 | int config_lineno=0; |
fe5e9cc4 | 57 | cstring_t config_file="xxx"; |
2fe58dfd SE |
58 | |
59 | static struct p_node *leafnode(uint32_t type) | |
60 | { | |
61 | struct p_node *r; | |
62 | ||
b7886fd4 | 63 | NEW(r); |
2fe58dfd SE |
64 | r->type=type; |
65 | r->loc.file=config_file; | |
66 | r->loc.line=config_lineno; | |
67 | r->l=NULL; r->r=NULL; | |
68 | return r; | |
69 | } | |
70 | ||
71 | static struct p_node *keynode(atom_t key) | |
72 | { | |
73 | struct p_node *r; | |
74 | r=leafnode(T_KEY); | |
75 | r->data.key=intern(key); | |
76 | return r; | |
77 | } | |
78 | ||
79 | static struct p_node *stringnode(string_t string) | |
80 | { | |
81 | struct p_node *r; | |
82 | r=leafnode(T_STRING); | |
83 | string++; | |
84 | string[strlen(string)-1]=0; | |
85 | r->data.string=safe_strdup(string,"stringnode"); | |
86 | return r; | |
87 | } | |
88 | ||
89 | static struct p_node *numnode(string_t number) | |
90 | { | |
91 | struct p_node *r; | |
3f36eb5f | 92 | unsigned long n; |
2fe58dfd | 93 | r=leafnode(T_NUMBER); |
3f36eb5f RK |
94 | errno = 0; |
95 | n = strtoul(number, NULL, 10); | |
96 | /* The caller is expected to only give us [0-9]+, | |
97 | * so we skip some of the usual syntax checking. */ | |
98 | r->data.number=n; | |
99 | /* Give a consistent error message for any kind of | |
100 | * out-of-range condition */ | |
101 | if(errno == ERANGE || n != r->data.number) { | |
102 | Message(M_FATAL,"config file %s line %d: '%s' is too big\n", | |
103 | config_file, config_lineno, number); | |
104 | exit(1); | |
105 | } | |
106 | if(errno) { | |
107 | Message(M_FATAL,"config file %s line %d: '%s': %s\n", | |
108 | config_file, config_lineno, number, strerror(errno)); | |
109 | exit(1); | |
110 | } | |
2fe58dfd SE |
111 | return r; |
112 | } | |
113 | ||
114 | %} | |
115 | ||
116 | %% | |
117 | include BEGIN(incl); | |
118 | <incl>[ \t]* /* eat the whitespace */ | |
119 | <incl>[^ \t\n]+ { /* got the include filename */ | |
120 | if (include_stack_ptr >= MAX_INCLUDE_DEPTH) { | |
121 | fatal("Configuration file includes nested too deeply"); | |
122 | } | |
974d0468 SE |
123 | include_stack[include_stack_ptr].bst=YY_CURRENT_BUFFER; |
124 | include_stack[include_stack_ptr].lineno=config_lineno; | |
125 | include_stack[include_stack_ptr].file=config_file; | |
126 | include_stack_ptr++; | |
2fe58dfd SE |
127 | yyin=fopen(yytext,"r"); |
128 | if (!yyin) { | |
129 | fatal("Can't open included file %s",yytext); | |
130 | } | |
974d0468 SE |
131 | config_lineno=1; |
132 | config_file=safe_strdup(yytext,"conffile.fl/include"); | |
2fe58dfd SE |
133 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); |
134 | BEGIN(INITIAL); | |
135 | } | |
fe5e9cc4 SE |
136 | <incl>\n { /* include with no filename */ |
137 | Message(M_FATAL,"config file %s line %d: %s\n",config_file, | |
138 | config_lineno,"``include'' requires a filename"); | |
139 | BEGIN(INITIAL); | |
59230b9b | 140 | assert(config_lineno < INT_MAX); |
fe5e9cc4 SE |
141 | ++config_lineno; |
142 | ++yynerrs; | |
143 | } | |
144 | ||
2fe58dfd SE |
145 | <<EOF>> { |
146 | if (--include_stack_ptr < 0) { | |
147 | yyterminate(); | |
148 | } | |
149 | else { | |
150 | fclose(yyin); | |
151 | yy_delete_buffer(YY_CURRENT_BUFFER); | |
974d0468 SE |
152 | yy_switch_to_buffer(include_stack[include_stack_ptr].bst); |
153 | config_lineno=include_stack[include_stack_ptr].lineno; | |
154 | config_file=include_stack[include_stack_ptr].file; | |
2fe58dfd SE |
155 | } |
156 | } | |
157 | \"[^\"]*\" yylval=stringnode(yytext); return TOK_STRING; | |
158 | ||
159 | [[:alpha:]_][[:alnum:]\-_]* yylval=keynode(yytext); return TOK_KEY; | |
160 | ||
161 | [[:digit:]]+ yylval=numnode(yytext); return TOK_NUMBER; | |
162 | ||
163 | /* Eat comments */ | |
164 | \#.*\n config_lineno++; | |
165 | /* Count lines */ | |
166 | \n config_lineno++; | |
167 | /* Eat whitespace */ | |
168 | [[:blank:]\j] | |
169 | ||
170 | /* Return all unclaimed single characters to the parser */ | |
171 | . return *yytext; | |
172 |