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|
%{
/**
* \file parser.y
* Parser for the rcfile.
*
* \author Adapted from fetchmail's rcfile_y.y by José Fonseca
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libesmtp.h>
#include "main.h"
#include "smtp.h"
#include "local.h"
#include "xmalloc.h"
/* parser reads these */
char *rcfile = NULL; /* path name of dot file */
/* parser sets these */
int yydebug; /* in case we didn't generate with -- debug */
static identity_t *identity = NULL;
/* using Bison, this arranges that yydebug messages will show actual tokens */
extern char * yytext;
#define YYPRINT(fp, type, val) fprintf(fp, " = \"%s\"", yytext)
void yyerror (const char *s);
%}
%union {
int number;
char *sval;
}
%token IDENTITY HOSTNAME USERNAME PASSWORD STARTTLS CERTIFICATE_PASSPHRASE MDA
%token MAP
%token DISABLED ENABLED REQUIRED
%token <sval> STRING
%token <number> NUMBER
%%
rcfile : /* empty */
| statement_list
| statement_list identity_list
| identity_list
;
identity_list : identity
| identity statement_list
| identity_list identity statement_list
;
map : /* empty */
| MAP
;
identity : IDENTITY map STRING
{
identity = identity_new();
identity_add(identity);
identity->address = xstrdup($3);
}
;
statement_list : statement
| statement_list statement
;
/* future global options should also have the form SET <name> optmap <value> */
statement : HOSTNAME map STRING { identity->host = xstrdup($3); }
| USERNAME map STRING { identity->user = xstrdup($3); }
| PASSWORD map STRING { identity->pass = xstrdup($3); }
| STARTTLS map DISABLED { identity->starttls = Starttls_DISABLED; }
| STARTTLS map ENABLED { identity->starttls = Starttls_ENABLED; }
| STARTTLS map REQUIRED { identity->starttls = Starttls_REQUIRED; }
| CERTIFICATE_PASSPHRASE map STRING { identity->certificate_passphrase = xstrdup($3); }
| MDA map STRING { mda = xstrdup($3); }
;
%%
/* lexer interface */
extern int lineno;
extern char *yytext;
extern FILE *yyin;
void yyerror (const char *s)
/* report a syntax error */
{
fprintf(stderr, "%s:%d: %s at %s\n", rcfile, lineno, s,
(yytext && yytext[0]) ? yytext : "end of input");
exit(EX_CONFIG);
}
#define RCFILE ".esmtprc"
void parse_rcfile (void)
{
if(!rcfile)
{
char *home;
/* Setup the rcfile name. */
if (!(home = getenv("HOME")))
return;
if (!(rcfile = malloc(strlen(home) + strlen(RCFILE) + 2)))
return;
strcpy(rcfile, home);
if (rcfile[strlen(rcfile) - 1] != '/')
strcat(rcfile, "/");
strcat(rcfile, RCFILE);
}
identity = default_identity;
/* Open the configuration file and feed it to the lexer. */
if (!(yyin = fopen(rcfile, "r")))
{
if (errno != ENOENT)
{
fprintf(stderr, "open: %s: %s\n", rcfile, strerror(errno));
}
}
else
{
yyparse(); /* parse entire file */
fclose(yyin); /* not checking this should be safe, file mode was r */
}
free(rcfile);
}
/* easier to do this than cope with variations in where the library lives */
int yywrap(void) { return 1; }
|
