summaryrefslogtreecommitdiffabout
path: root/gram.y
authorSergey Poznyakoff <gray@gnu.org.ua>2005-04-28 14:40:22 (GMT)
committer Sergey Poznyakoff <gray@gnu.org.ua>2005-04-28 14:40:22 (GMT)
commit0d8e04d0b65246cc86aabb4beb032a84be184bda (patch) (side-by-side diff)
treeb9be359d35d605c8c8ebe51f51349d19d572da65 /gram.y
downloadalck-0d8e04d0b65246cc86aabb4beb032a84be184bda.tar.gz
alck-0d8e04d0b65246cc86aabb4beb032a84be184bda.tar.bz2
Added to the repository
git-svn-id: file:///svnroot/gsc/trunk@38 d2de0444-eb31-0410-8365-af798a554d48
Diffstat (limited to 'gram.y') (more/less context) (ignore whitespace changes)
-rw-r--r--gram.y252
1 files changed, 252 insertions, 0 deletions
diff --git a/gram.y b/gram.y
new file mode 100644
index 0000000..86578cf
--- a/dev/null
+++ b/gram.y
@@ -0,0 +1,252 @@
+%{
+#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);
+}

Return to:

Send suggestions and report system problems to the System administrator.