int main(int argc, char *argv[])
{
shr_key_t key;
shr_t shr;
shr_t revshr;
ssize_t got = 1, wrote;
pid_t pid;
int closed = 0;
size_t ptr, len;
if (argc != 1) {
fprintf(stderr, "See README for usage.\n");
return 1;
}
SHR_PRIVATE(&key, BUFFER_SIZE, 3);
t (shr_open(&shr, &key, SHR_WRITE));
t (shr_reverse_dup(&shr, &revshr));
t (pid = fork());
if (pid)
shr = revshr;
while (!pid && got) {
char* buf;
t (shr_write(&shr, &buf));
t (got = read(STDIN_FILENO, buf, BUFFER_SIZE));
t (shr_write_done(&shr, (size_t)got));
}
while (pid && !closed) {
const char* buf;
t (shr_read(&shr, &buf, &len));
for (ptr = 0; ptr < len;) {
t (wrote = write(STDOUT_FILENO, buf, len));
ptr += (size_t)wrote;
}
t (closed = shr_read_done(&shr));
}
shr_close(&shr);
if (pid)
shr_remove(&shr);
return 0;
fail:
perror(called);
shr_remove_by_key(&key);
return 1;
(void) argv;
}
int main() {
struct shr *s=NULL;
int rc = -1;
unlink(ring);
if (shr_init(ring, 6, 0) < 0) goto done;
s = shr_open(ring);
if (s == NULL) goto done;
printf("writing ...");
if (shr_write(s, &data[0], 3) < 0) goto done;
printf("ok\n");
printf("reading ...");
ssize_t nr;
nr = shr_read(s, out, sizeof(out));
if (nr < 0) goto done;
printf("read %ld bytes\n", (long)nr);
if (nr > 0) printf("%.*s\n", (int)nr, out);
printf("writing ...");
if (shr_write(s, &data[3], 3) < 0) goto done;
printf("ok\n");
printf("reading ...");
nr = shr_read(s, out, sizeof(out));
if (nr < 0) goto done;
printf("read %ld bytes\n", (long)nr);
if (nr > 0) printf("%.*s\n", (int)nr, out);
rc = 0;
done:
printf("end\n");
if (s) shr_close(s);
return rc;
}