JPEG File Extraction from stdin

1 pointsby textmodealmost 4 years ago

<p><pre><code> cat > 056.l /* JPEG file carver */ #define echo ECHO #define jmp BEGIN int fileno(FILE *); xa "\xFF\xD8" xb "\xFF\xD9" %s xa %option noyywrap nounput noinput %% {xa} echo;jmp xa; <xa>{xb} echo;jmp 0; <xa>.|\n|\r echo; .|\n %% int main(){ yylex();exit(0) ;} ^D flex 056.l cc -static -o yy056 lex.yy.c</code></pre>