1/* Verify capture output from a subprocess.
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdbool.h>
20#include <stdio.h>
21#include <support/capture_subprocess.h>
22#include <support/check.h>
23#include <sys/wait.h>
24
25static void
26print_context (const char *context, bool *failed)
27{
28 if (*failed)
29 /* Do not duplicate message. */
30 return;
31 support_record_failure ();
32 printf ("error: subprocess failed: %s\n", context);
33}
34
35static void
36print_actual_status (struct support_capture_subprocess *proc)
37{
38 if (WIFEXITED (proc->status))
39 printf ("error: actual exit status: %d [0x%x]\n",
40 WEXITSTATUS (proc->status), proc->status);
41 else if (WIFSIGNALED (proc->status))
42 printf ("error: actual termination signal: %d [0x%x]\n",
43 WTERMSIG (proc->status), proc->status);
44 else
45 printf ("error: actual undecoded exit status: [0x%x]\n", proc->status);
46}
47
48void
49support_capture_subprocess_check (struct support_capture_subprocess *proc,
50 const char *context, int status_or_signal,
51 int allowed)
52{
53 TEST_VERIFY ((allowed & sc_allow_none)
54 || (allowed & sc_allow_stdout)
55 || (allowed & sc_allow_stderr));
56 TEST_VERIFY (!((allowed & sc_allow_none)
57 && ((allowed & sc_allow_stdout)
58 || (allowed & sc_allow_stderr))));
59
60 bool failed = false;
61 if (status_or_signal >= 0)
62 {
63 /* Expect regular termination. */
64 if (!(WIFEXITED (proc->status)
65 && WEXITSTATUS (proc->status) == status_or_signal))
66 {
67 print_context (context, &failed);
68 printf ("error: expected exit status: %d\n", status_or_signal);
69 print_actual_status (proc);
70 }
71 }
72 else
73 {
74 /* status_or_signal < 0. Expect termination by signal. */
75 if (!(WIFSIGNALED (proc->status)
76 && WTERMSIG (proc->status) == -status_or_signal))
77 {
78 print_context (context, &failed);
79 printf ("error: expected termination signal: %d\n",
80 -status_or_signal);
81 print_actual_status (proc);
82 }
83 }
84 if (!(allowed & sc_allow_stdout) && proc->out.length != 0)
85 {
86 print_context (context, &failed);
87 printf ("error: unexpected output from subprocess\n");
88 fwrite (proc->out.buffer, proc->out.length, 1, stdout);
89 puts ("\n");
90 }
91 if (!(allowed & sc_allow_stderr) && proc->err.length != 0)
92 {
93 print_context (context, &failed);
94 printf ("error: unexpected error output from subprocess\n");
95 fwrite (proc->err.buffer, proc->err.length, 1, stdout);
96 puts ("\n");
97 }
98}
99