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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
int main(void)
{
/* Size of message must be <= PIPE_BUF */
const char msg[] = "Hello, World!";
char buf[512];
int rv;
int pfd[2];
if (pipe(pfd)) {
perror("pipe");
return 1;
}
if (write(pfd[1], msg, sizeof msg) != sizeof msg) {
perror("write");
return 1;
}
while ((rv = read(pfd[0], buf, sizeof buf)) < sizeof msg) {
if (rv == -1 && errno == EINTR)
continue;
perror("read");
return 1;
}
if (memcmp(msg, buf, sizeof msg)) {
fprintf(stderr, "Message miscompare!\n");
return 1;
}
return 0;
}
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