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-rw-r--r--conf/cf-lex.l89
-rw-r--r--conf/conf.c7
-rw-r--r--conf/conf.h23
3 files changed, 103 insertions, 16 deletions
diff --git a/conf/cf-lex.l b/conf/cf-lex.l
index a5f70fff..79dbab29 100644
--- a/conf/cf-lex.l
+++ b/conf/cf-lex.l
@@ -63,19 +63,27 @@ struct sym_scope {
};
static struct sym_scope *conf_this_scope;
-int conf_lino;
+#define MAX_INCLUDE_DEPTH 5
+
+static struct include_file_stack *ifs_head;
+static int ifs_depth;
static int cf_hash(byte *c);
static struct symbol *cf_find_sym(byte *c, unsigned int h0);
linpool *cfg_mem;
-int (*cf_read_hook)(byte *buf, unsigned int max);
+int (*cf_read_hook)(byte *buf, unsigned int max, int fd);
+int (*cf_open_hook)(char *filename);
-#define YY_INPUT(buf,result,max) result = cf_read_hook(buf, max);
+#define YY_INPUT(buf,result,max) result = cf_read_hook(buf, max, ifs->conf_fd);
#define YY_NO_UNPUT
#define YY_FATAL_ERROR(msg) cf_error(msg)
+static void new_include(void);
+static int check_eof(void);
+static struct include_file_stack *new_stack(struct include_file_stack *old);
+
%}
%option noyywrap
@@ -90,8 +98,10 @@ DIGIT [0-9]
XIGIT [0-9a-fA-F]
ALNUM [a-zA-Z_0-9]
WHITE [ \t]
+include ^{WHITE}*include{WHITE}*\".*\"{WHITE}*;
%%
+{include} { if(cf_open_hook) new_include(); }
{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+ {
#ifdef IPV6
@@ -188,11 +198,11 @@ else: {
["][^"\n]*\n cf_error("Unterminated string");
-<INITIAL,COMMENT><<EOF>> return END;
+<INITIAL,COMMENT><<EOF>> { if(check_eof()) return END; }
{WHITE}+
-\n conf_lino++;
+\n ifs->conf_lino++;
# BEGIN(COMMENT);
@@ -201,14 +211,14 @@ else: {
. cf_error("Unknown character");
<COMMENT>\n {
- conf_lino++;
+ ifs->conf_lino++;
BEGIN(INITIAL);
}
<COMMENT>.
<CCOMM>\*\/ BEGIN(INITIAL);
-<CCOMM>\n conf_lino++;
+<CCOMM>\n ifs->conf_lino++;
<CCOMM>\/\* cf_error("Comment nesting not supported");
<CCOMM><<EOF>> cf_error("Unterminated comment");
<CCOMM>.
@@ -234,6 +244,50 @@ cf_hash(byte *c)
return h;
}
+/* Open included file with properly swapped buffers */
+static void
+new_include(void)
+{
+ char *fname, *p = NULL;
+
+ if ((fname = strchr(yytext, '"')) != NULL) {
+
+ if ((p = strchr(++fname, '"')) != NULL) *p = '\0';
+
+ if (ifs_depth >= MAX_INCLUDE_DEPTH)
+ cf_error("Max include depth reached.");
+
+ /* Save current stack */
+ ifs->stack = YY_CURRENT_BUFFER;
+ /* Prepare new stack */
+ ifs->next = new_stack(ifs);
+ ifs = ifs->next;
+ strcpy(ifs->conf_fname, fname); /* XXX: strlcpy should be here */
+ ifs->conf_fd = cf_open_hook(fname);
+
+ yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
+ }
+}
+
+static int
+check_eof(void)
+{
+ if (ifs == ifs_head) {
+ /* EOF in main config file */
+ ifs->conf_lino = 1;
+ return 1;
+ }
+
+ ifs_depth--;
+ close(ifs->conf_fd);
+ ifs = ifs->prev;
+ ifs->next = NULL;
+
+ yy_delete_buffer(YY_CURRENT_BUFFER);
+ yy_switch_to_buffer(ifs->stack);
+ return 0;
+}
+
static struct symbol *
cf_new_sym(byte *c, unsigned int h)
{
@@ -359,6 +413,16 @@ cf_lex_init_kh(void)
kw_hash_inited = 1;
}
+static struct include_file_stack *
+new_stack(struct include_file_stack *old)
+{
+ struct include_file_stack *ret;
+ ret = cfg_allocz(sizeof(struct include_file_stack));
+ ret->conf_lino = 1;
+ ret->prev = old;
+ return ret;
+}
+
/**
* cf_lex_init - initialize the lexer
* @is_cli: true if we're going to parse CLI command, false for configuration
@@ -367,11 +431,18 @@ cf_lex_init_kh(void)
* parsing of a new input.
*/
void
-cf_lex_init(int is_cli)
+cf_lex_init(int is_cli, struct config *c)
{
if (!kw_hash_inited)
cf_lex_init_kh();
- conf_lino = 1;
+ ifs_head = new_stack(NULL);
+ ifs = ifs_head;
+ ifs_depth = 0;
+ if (!is_cli) {
+ ifs->conf_fd = c->file_fd;
+ ifs_depth = 1;
+ strcpy(ifs->conf_fname, c->file_name);
+ }
yyrestart(NULL);
if (is_cli)
BEGIN(CLI);
diff --git a/conf/conf.c b/conf/conf.c
index 604a412c..5bdeece2 100644
--- a/conf/conf.c
+++ b/conf/conf.c
@@ -108,7 +108,7 @@ config_parse(struct config *c)
cfg_mem = c->mem;
if (setjmp(conf_jmpbuf))
return 0;
- cf_lex_init(0);
+ cf_lex_init(0, c);
sysdep_preconfig(c);
protos_preconfig(c);
rt_preconfig(c);
@@ -138,7 +138,7 @@ cli_parse(struct config *c)
cfg_mem = c->mem;
if (setjmp(conf_jmpbuf))
return 0;
- cf_lex_init(1);
+ cf_lex_init(1, c);
cf_parse();
return 1;
}
@@ -355,7 +355,8 @@ cf_error(char *msg, ...)
if (bvsnprintf(buf, sizeof(buf), msg, args) < 0)
strcpy(buf, "<bug: error message too long>");
new_config->err_msg = cfg_strdup(buf);
- new_config->err_lino = conf_lino;
+ new_config->err_lino = ifs->conf_lino;
+ new_config->err_file_name = ifs->conf_fname;
longjmp(conf_jmpbuf, 1);
}
diff --git a/conf/conf.h b/conf/conf.h
index 6c784d7e..df772681 100644
--- a/conf/conf.h
+++ b/conf/conf.h
@@ -12,6 +12,8 @@
#include "lib/resource.h"
#include "lib/timer.h"
+#define BIRD_FNAME_MAX 255 /* Would be better to use some UNIX define */
+
/* Configuration structure */
struct config {
@@ -38,7 +40,9 @@ struct config {
int cli_debug; /* Tracing of CLI connections and commands */
char *err_msg; /* Parser error message */
int err_lino; /* Line containing error */
- char *file_name; /* Name of configuration file */
+ char *err_file_name; /* File name containing error */
+ char *file_name; /* Name of main configuration file */
+ int file_fd; /* File descriptor of main configuration file */
struct symbol **sym_hash; /* Lexer: symbol hash table */
struct symbol **sym_fallback; /* Lexer: fallback symbol hash table */
int obstacle_count; /* Number of items blocking freeing of this config */
@@ -83,7 +87,8 @@ char *cfg_strdup(char *c);
/* Lexer */
-extern int (*cf_read_hook)(byte *buf, unsigned int max);
+extern int (*cf_read_hook)(byte *buf, unsigned int max, int fd);
+extern int (*cf_open_hook)(char *filename);
struct symbol {
struct symbol *next;
@@ -106,10 +111,20 @@ struct symbol {
#define SYM_VARIABLE 0x100 /* 0x100-0x1ff are variable types */
-extern int conf_lino;
+struct include_file_stack {
+ void *stack; /* Internal lexer state */
+ unsigned int conf_lino; /* Current file lineno (at include) */
+ char conf_fname[BIRD_FNAME_MAX]; /* Current file name */
+ int conf_fd; /* Current file descriptor */
+ struct include_file_stack *prev;
+ struct include_file_stack *next;
+};
+
+struct include_file_stack *ifs;
+
int cf_lex(void);
-void cf_lex_init(int is_cli);
+void cf_lex_init(int is_cli, struct config *c);
struct symbol *cf_find_symbol(byte *c);
struct symbol *cf_default_name(char *template, int *counter);
struct symbol *cf_define_symbol(struct symbol *symbol, int type, void *def);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 14:32:51 +0000