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- #include <stdlib.h>
- #include <stdio.h>
-
- /* Converts stdin to a content that is "tty safe", that is, that it doesn't
- * contain ASCII control characters that can mess up serial communication.
- * How it works is that it leaves any char > 0x20 intact, but any char <= 0x20
- * is replaced by two chars: 0x20, then char|0x80. A 0x20 char always indicate
- * "take the next char you'll receive and unset the 7th bit from it".
- */
-
- int main(void)
- {
- int c = getchar();
- while (c != EOF) {
- if (c <= 0x20) {
- putchar(0x20);
- putchar(c|0x80);
- } else {
- putchar(c&0xff);
- }
- c = getchar();
- }
- return 0;
- }
-
-
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