| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #ifndef BUFSIZ |
| # define BUFSIZ 4096 |
| #endif |
| |
| #undef BUFSIZ |
| # define BUFSIZ 64 |
| int main (void) |
| { |
| short ibuff[BUFSIZ], obuff[BUFSIZ]; |
| int rc, i, len; |
| |
| while ((rc = read (0, ibuff, sizeof (ibuff))) > 0) { |
| memset (obuff, 0, sizeof (obuff)); |
| for (i = 0; i < (rc + 1) / 2; i++) { |
| obuff[i] = ibuff[i ^ 1]; |
| } |
| |
| len = (rc + 1) & ~1; |
| |
| if (write (1, obuff, len) != len) { |
| perror ("read error"); |
| return (EXIT_FAILURE); |
| } |
| |
| memset (ibuff, 0, sizeof (ibuff)); |
| } |
| |
| if (rc < 0) { |
| perror ("read error"); |
| return (EXIT_FAILURE); |
| } |
| return (EXIT_SUCCESS); |
| } |
