119 lines
1.5 KiB
Plaintext
119 lines
1.5 KiB
Plaintext
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/*
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* Convert mail alias file to nameserver DB format.
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*/
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%{
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#include <stdio.h>
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#include <ctype.h>
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char yytext[BUFSIZ];
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int lineno = 1;
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%}
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%token NAME
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%start list
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%%
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list: /* empty */
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| list alias ':' a_list
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;
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alias: NAME {
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printf("%s IN MB UCB-VAX.ARPA\n", yytext);
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}
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;
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a_list: aname
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| a_list ',' aname
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;
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aname: NAME {
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printf(" IN MG %s\n", yytext);
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}
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;
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%%
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yylex()
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{
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register char *cp;
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register int c;
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char op[32];
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for (;;) {
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c = getchar();
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top:
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switch (c) {
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case '#':
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while ((c = getchar()) != EOF && c != '\n')
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;
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goto top;
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case '\\':
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if ((c = getchar()) == EOF) {
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c = '\\';
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break;
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}
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if (c != '\n') {
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ungetc(c, stdin);
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c = '\\';
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break;
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}
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case '\n':
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lineno++;
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case ' ':
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case '\t':
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continue;
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case EOF:
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case ':':
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case ',':
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return (c);
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}
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cp = yytext;
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do {
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if (c == '"') {
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do {
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if (cp >= &yytext[BUFSIZ-1]) {
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yyerror("buffer overflow");
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break;
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}
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*cp++ = c;
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} while ((c = getchar()) != EOF && c != '"');
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}
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if (cp >= &yytext[BUFSIZ-1]) {
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yyerror("buffer overflow");
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break;
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}
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if (islower(c))
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c = toupper(c);
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*cp++ = c;
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} while ((c = getchar()) != EOF && !any(c, ",: \t\n"));
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ungetc(c, stdin);
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*cp = '\0';
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return (NAME);
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}
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}
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any(c, s)
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int c;
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register char *s;
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{
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while (*s)
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if (c == *s++)
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return (1);
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return (0);
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}
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main()
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{
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yyparse();
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}
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yyerror(s)
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char *s;
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{
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fprintf(stderr, "line %d: %s\n", lineno, s);
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}
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