113 lines
1.5 KiB
Plaintext
113 lines
1.5 KiB
Plaintext
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%{
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#include <err.h>
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#include <string.h>
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#include <syslog.h>
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#include "dma.h"
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extern int yylineno;
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static void yyerror(const char *);
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int yywrap(void);
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int yylex(void);
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static void
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yyerror(const char *msg)
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{
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/**
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* Because we do error '\n' below, we need to report the error
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* one line above of what yylineno points to.
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*/
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syslog(LOG_CRIT, "aliases line %d: %s", yylineno - 1, msg);
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fprintf(stderr, "aliases line %d: %s\n", yylineno - 1, msg);
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}
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int
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yywrap(void)
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{
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return (1);
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}
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%}
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%union {
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char *ident;
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struct stritem *strit;
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struct alias *alias;
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}
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%token <ident> T_IDENT
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%token T_ERROR
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%token T_EOF 0
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%type <strit> dests
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%type <alias> alias aliases
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%%
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start : aliases T_EOF
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{
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LIST_FIRST(&aliases) = $1;
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}
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aliases : /* EMPTY */
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{
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$$ = NULL;
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}
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| alias aliases
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{
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if ($2 != NULL && $1 != NULL)
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LIST_INSERT_AFTER($2, $1, next);
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else if ($2 == NULL)
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$2 = $1;
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$$ = $2;
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}
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;
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alias : T_IDENT ':' dests '\n'
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{
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struct alias *al;
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if ($1 == NULL)
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YYABORT;
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al = calloc(1, sizeof(*al));
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if (al == NULL)
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YYABORT;
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al->alias = $1;
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SLIST_FIRST(&al->dests) = $3;
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$$ = al;
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}
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| error '\n'
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{
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YYABORT;
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}
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;
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dests : T_IDENT
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{
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struct stritem *it;
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if ($1 == NULL)
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YYABORT;
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it = calloc(1, sizeof(*it));
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if (it == NULL)
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YYABORT;
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it->str = $1;
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$$ = it;
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}
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| T_IDENT ',' dests
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{
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struct stritem *it;
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if ($1 == NULL)
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YYABORT;
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it = calloc(1, sizeof(*it));
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if (it == NULL)
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YYABORT;
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it->str = $1;
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SLIST_NEXT(it, next) = $3;
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$$ = it;
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}
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;
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%%
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