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|
%{
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <getopt.h>
#include <errno.h>
#include "ckaliases.h"
SLIST *cw_list; /* List of domain names pertaining to Sendmail 'w' class */
static int restricted; /* prohibit use of `special' aliases (pipes, file redirections
and includes */
int verbose; /* Verbose mode */
static int error_count; /* Number of errors detected so far */
%}
%union {
char *string;
SLIST *slist;
};
%token <string> IDENT EMAIL STRING LHS
%token CONT
%token EOL
%token INCLUDE
%type <string> string lhs
%type <slist> rhs emails email
%%
input : list
;
list : alias
| list EOL alias
| list error EOL
{
yyclearin;
yyerrok;
}
;
alias : /* empty */
| lhs rhs
{
regalias($1, $2);
}
;
lhs : LHS ':'
;
rhs : emails
| rhs CONT emails
{
slist_append(&$1, $3);
$$ = $1;
}
;
emails: email
| emails ',' email
{
slist_append(&$1, $3);
$$ = $1;
}
;
email : string
{
if (restricted && ($1[0] == '|' || $1[0] == '/')) {
yyerror("Construct not allowed");
YYERROR;
}
$$ = NULL;
slist_add(&$$, $1);
}
| EMAIL
{
$$ = NULL;
slist_add(&$$, $1);
}
| INCLUDE string
{
if (restricted) {
yyerror("Include statement is not allowed");
YYERROR;
}
$$ = NULL;
read_include(&$$, $2);
}
;
string: IDENT
| STRING
;
%%
void
error(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
error_count++;
}
yyerror(char *s)
{
error("%s:%d: %s", file_name, line_num, s);
}
void
usage()
{
printf("usage: ckaliases [OPTIONS] [FILES...]\n");
printf("OPTIONS and FILES may be interspered.\n");
printf("Valid options are:\n");
printf(" -d SPEC Set debug level. SPEC consists of the following\n");
printf(" letters:\n");
printf(" y enable parser debugging\n");
printf(" l enable lexical analizer debugging\n");
printf(" Upper-case variants are also accepted. Prepending\n");
printf(" a letter with '-' reverts its sense\n");
printf(" -h Display this help list\n");
printf(" -r Restrict alias file syntax to aliases only (i.e.\n");
printf(" prohibit use of pipes and file redirections\n");
printf(" -u Revert the effect of the previous -r option\n");
printf(" -v Verbose mode\n");
printf(" -w FILE Read contents of Sendmail `w' class from the given\n");
printf(" file.\n");
}
int
main(int argc, char **argv)
{
char *p;
int c;
int file_count = 0;
int true = 1;
char *cwfile = "/etc/mail/sendmail.cw";
SLIST *file_list; /* List of files to be read */
struct string_list *s;
begin_aliases();
init_lex();
while ((c = getopt(argc, argv, "-d:f:hp:ruvw:")) != EOF) {
switch (c) {
case 1:
if (!cw_list)
read_include(&cw_list, cwfile);
openaliases(optarg);
yyparse();
file_count++;
break;
case 'd':
for (p = optarg; *p; p++) {
switch (*p) {
case '-':
true = 0;
break;
case 'y':
case 'Y':
yydebug = true;
true = 1;
break;
case 'l':
case 'L':
lex_debug(true);
true = 1;
break;
default:
fprintf(stderr, "%s: unknown debug option %c\n",
argv[0], *p);
exit(1);
}
}
break;
case 'f':
if (!cw_list)
read_include(&cw_list, cwfile);
file_list = NULL;
read_include(&file_list, optarg);
for (s = file_list->head; s; s = s->next) {
openaliases_prefix(optarg, s->str);
yyparse();
file_count++;
}
slist_destroy(&file_list);
break;
case 'h':
usage();
exit(0);
case 'r':
restricted = 1;
break;
case 'u':
restricted = 0;
break;
case 'v':
verbose++;
break;
case 'w':
if (file_count) {
error("-w must be used before first non-option argument");
exit(1);
}
cwfile = optarg;
break;
default:
exit(1);
}
}
argc -= optind;
argv += optind;
if (!cw_list)
read_include(&cw_list, cwfile);
while (argc--) {
openaliases(*argv++);
yyparse();
file_count++;
}
if (!file_count) {
error("no files specified");
exit(1);
}
if (verbose)
printf("%d files\n", file_count);
end_aliases();
check_aliases();
if (verbose)
printf("%lu errors\n", error_count);
exit(error_count!=0);
}
|
