static pid_t forkzio_fork (forkzio_t ctx)
{
pid_t pid;
switch ((pid = fork ())) {
case -1: /* error */
err_exit ("fork");
case 0: /* child */
close (STDIN_FILENO);
dup2 (zio_src_fd (ctx->zio[0]), STDIN_FILENO);
close (zio_src_fd (ctx->zio[0]));
close (zio_dst_fd (ctx->zio[0]));
close (STDOUT_FILENO);
dup2 (zio_dst_fd (ctx->zio[1]), STDOUT_FILENO);
close (zio_dst_fd (ctx->zio[1]));
close (zio_src_fd (ctx->zio[1]));
close (STDERR_FILENO);
dup2 (zio_dst_fd (ctx->zio[2]), STDERR_FILENO);
close (zio_dst_fd (ctx->zio[2]));
close (zio_src_fd (ctx->zio[2]));
(void)execvp (ctx->av[0], ctx->av);
err_exit ("%s", ctx->av[0]);
default: /* parent */
close (zio_src_fd (ctx->zio[0]));
close (zio_dst_fd (ctx->zio[1]));
close (zio_dst_fd (ctx->zio[2]));
break;
}
return pid;
}
static int child_io_setup (struct subprocess *p)
{
/*
* Close parent end of stdio in child:
*/
if (zio_close_dst_fd (p->zio_in) < 0
|| zio_close_src_fd (p->zio_out) < 0
|| zio_close_src_fd (p->zio_err) < 0)
return (-1);
/*
* Dup this process' fds onto zio
*/
if ( (dup2_fd (zio_src_fd (p->zio_in), STDIN_FILENO) < 0)
|| (dup2_fd (zio_dst_fd (p->zio_out), STDOUT_FILENO) < 0)
|| (dup2_fd (zio_dst_fd (p->zio_err), STDERR_FILENO) < 0))
return (-1);
return (0);
}
int main (int argc, char **argv)
{
zio_t *zio;
int init_fds;
const char *name;
struct counts c;
int fd;
flux_reactor_t *r;
flux_watcher_t *w;
memset (&c, 0, sizeof (c));
plan (NO_PLAN);
test_encode ();
ok ((r = flux_reactor_create (0)) != NULL,
"flux reactor created");
init_fds = fdcount ();
diag ("initial fd count: %d", init_fds);
/* simple reader tests
*/
ok ((zio = zio_pipe_reader_create ("test1", &c)) != NULL,
"reader: zio_pipe_reader_create works");
ok ((name = zio_name (zio)) != NULL && !strcmp (name, "test1"),
"reader: zio_name returns correct name");
ok (zio_set_close_cb (zio, close_reader) == 0,
"reader: zio_set_close_cb works");
ok (zio_set_send_cb (zio, send_reader) == 0,
"reader: zio_set_send_cb works");
ok (zio_reactor_attach (zio, r) == 0,
"reader: zio_reactor_attach works");
ok ((fd = zio_dst_fd (zio)) >= 0,
"reader: zio_dst_fd returned valid file descriptor");
ok (write (fd, "narf!", 5) == 5,
"reader: wrote narf! to reader pipe");
ok (zio_close_dst_fd (zio) == 0,
"reader: zio_close_dst_fd succeeded");
ok (flux_reactor_run (r, 0) == 0,
"reader: reactor completed successfully");
ok (c.send_reader == 1,
"reader: send function called once for EOF + incomplete line");
errno = 0;
zio_destroy (zio);
ok (init_fds == fdcount (),
"reader: zio_destroy leaks no file descriptors");
/* simple writer tests
*/
ok ((zio = zio_pipe_writer_create ("test2", &c)) != NULL,
"writer: zio_pipe_writer_create works");
ok ((name = zio_name (zio)) != NULL && !strcmp (name, "test2"),
"writer: zio_name returns correct name");
ok (zio_set_close_cb (zio, close_writer) == 0,
"writer: zio_set_close_cb works");
ok ((fd = zio_src_fd (zio)) >= 0,
"writer: zio_src_fd returned valid file descriptor");
w = flux_fd_watcher_create (r, fd, FLUX_POLLIN, fd_read, &c);
ok (w != NULL,
"writer: created fd watcher");
flux_watcher_start (w);
ok (zio_write (zio, "narf!", 5) == 5,
"writer: zio_write narf! works");
ok (zio_write_eof (zio) == 0,
"writer: zio_write_eof works");
ok (flux_reactor_run (r, 0) == 0,
"writer: reactor completed successfully");
ok (c.fd_read_errors == 0 && c.fd_read_data == 5 && c.fd_read_eof == 1,
"writer: read narf + EOF on read end of pipe");
ok (c.close_writer == 1,
"writer: close callback invoked");
zio_destroy (zio);
ok (init_fds == fdcount (),
"writer: zio_destroy leaks no file descriptors");
flux_watcher_destroy (w);
flux_reactor_destroy (r);
done_testing ();
}
