bin2hex.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 static int syntax() {
   5         printf("bin2hex - converts a file into a hex string\n"
   6                "he output is written to stdout\n"
   7                "bin2sh filename\n");
   8         return 1;
   9 }
  10
  11 int main(int argc, char** argv) {
  12         if(argc != 2) return syntax();
  13         FILE *f = fopen(argv[1], "r");
  14         if(!f) { perror("fopen"); return 1; }
  15         unsigned char buf[1];
  16         while(fread(buf, 1, 1, f)) {
  17                 printf("%02x", buf[0]);
  18         }
  19         printf("\n");
  20         fclose(f);
  21         return 0;
  22 }