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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
char buf[0xffff];
int main() {
ssize_t nread, nwrite, remains;
srandom(1); /* Always the same pseudo-random sequence */
while ( (nread=read(0, buf, 0xfff & rand())) > 0 ) {
remains = nread;
while ( remains ) {
nwrite=write(1, buf, nread);
if ( nwrite < 0 ) {
if ( !(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) ) {
perror("write");
return nwrite;
}
} else {
remains -= nwrite;
}
}
/*fprintf(stderr, "nread==%zu, nwrite==%zu\n", nread, nwrite);*/
usleep( 0xffff & rand() );
}
if ( nread < 0 ) {
perror("read");
return nread;
}
return 0;
}
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