1#include "posix_spawn_pipe_test.h"
2
3#include <errno.h>
4#include <unistd.h>
5#include <spawn.h>
6#include <stdio.h>
7#include <string.h>
8
9#define panic(n, str) if (n != 0) { perror(str); return 1; }
10#define readIdx 0
11#define writeIdx 1
12
13int main() {
14  int out[2], err[2];
15  posix_spawn_file_actions_t fdops;
16  pid_t pid;
17  char* const argv[] = { "./posix_spawn_pipe_err", NULL };
18
19  panic(pipe(out), "pipe stdout");
20  panic(pipe(err), "pipe stderr");
21
22  errno = posix_spawn_file_actions_init(&fdops);
23  panic(errno, "init");
24  errno = posix_spawn_file_actions_addclose(&fdops, out[readIdx]);
25  panic(errno, "close stdout read");
26  errno = posix_spawn_file_actions_adddup2(&fdops, out[writeIdx], 1);
27  panic(errno, "dup2 stdout write");
28  errno = posix_spawn_file_actions_addclose(&fdops, err[readIdx]);
29  panic(errno, "close stderr read");
30  errno = posix_spawn_file_actions_adddup2(&fdops, err[writeIdx], 2);
31  panic(errno, "dup2 stderr write");
32  errno = posix_spawn(&pid, "./posix_spawn_pipe_err", &fdops, NULL, argv, NULL);
33  panic(errno, "spawn");
34
35  FILE *cOut = fdopen(out[readIdx], "r");
36  if (cOut == NULL) panic(-1, "cOut");
37  FILE *cErr = fdopen(err[readIdx], "r");
38  if (cErr == NULL) panic(-1, "cErr");
39
40  char *buf = NULL;
41  size_t bufsize = 0;
42  getline(&buf, &bufsize, cOut);
43  panic(ferror(cOut), "getline cOut");
44  if (strcmp(buf, testOut) != 0) {
45    printf("stdout got: %s", buf);
46    printf("stdout exp: %s", testOut);
47  }
48  getline(&buf, &bufsize, cErr);
49  panic(ferror(cErr), "getline cErr");
50  if (strcmp(buf, testErr) != 0) {
51    printf("stderr got: %s", buf);
52    printf("stderr exp: %s", testErr);
53  }
54
55  return 0;
56}
57