read_raw.cc

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 *  Sun Microsystems Inc., March, 2001
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 *  Sun Industry Standards Source License Version 1.2
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#include <cstdio>
#include <cstring>

/*
 * Implements a binary which reads in from stdin in "raw" mode thill 
 * the first newline character occures
 *
 * This command can be used as a replacement for the buildin command
 * "read" in bourne shell. On most platforms this not able to read
 * in raw mode therefore it does backslash escaping. 
 *
 * As a result "binary" data with masked newline and backslash
 * characters can be read into a bourne shell scripts with this 
 * command.
 */

#define BUF_SIZE 8 * 1024

int main(int argc, char *argv[])
{
   char buffer[BUF_SIZE];
   char *ret;

   setvbuf(stdin,nullptr,_IONBF,0);

   ret = fgets(buffer, BUF_SIZE, stdin);
   if (ret != nullptr) {
      size_t length = strlen(ret);

      while (length-- > 0) {
         fputc(*(ret++), stdout);
      }
   }
   return feof(stdin);
}