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#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);
}