lex.l


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%{
#include "syntax.tab.h"

void yyerror(const char *s);
%}

%option noyywrap

%%

[\t ]+                 { /* Ignore whitespace */ }
"\n"                   { return NEWLINE; }
"\\\n"                 { printf("> "); }
"|"                    { return PIPE; }
"&&"                   { return AND; }
"||"                   { return OR; }
"<"                    { return REDIRECT_IN; }
">"                    { return REDIRECT_OUT; }
">>"                   { return APPEND; }
"&"                    { return BACKGROUND; }
[0-2]">"&[0-2]         { yylval.str = strdup(yytext); return FD_REDIRECT; }
\"[^\"]*\"             { yylval.str = strdup(yytext); return STRING; }
[a-zA-Z0-9_\-\/\*.]+   { yylval.str = strdup(yytext); return WORD; }
"("                    { return LPAREN; }
")"                    { return RPAREN; }

%%

void yyerror(const char *s) {
    fprintf(stderr, "error: %s\n", s);
}