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3a3fb2ed83
And simplify the interface of support_capture_subprogram_self_sgid.
Use the existing framework for temporary directories (now with
mode 0700) and directory/file deletion. Handle all execution
errors within support_capture_subprogram_self_sgid. In particular,
this includes test failures because the invoked program did not
exit with exit status zero. Existing tests that expect exit
status 42 are adjusted to use zero instead.
In addition, fix callers not to call exit (0) with test failures
pending (which may mask them, especially when running with --direct).
Fixes commit 35fc356fa3
("elf: Fix subprocess status handling for tst-dlopen-sgid (bug 32987)").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
79 lines
3.2 KiB
C
79 lines
3.2 KiB
C
/* Capture output from a subprocess.
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Copyright (C) 2017-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef SUPPORT_CAPTURE_SUBPROCESS_H
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#define SUPPORT_CAPTURE_SUBPROCESS_H
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#include <support/xmemstream.h>
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struct support_capture_subprocess
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{
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struct xmemstream out;
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struct xmemstream err;
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int status;
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};
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/* Invoke CALLBACK (CLOSURE) in a subprocess and capture standard
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output, standard error, and the exit status. The out.buffer and
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err.buffer members in the result are null-terminated strings which
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can be examined by the caller (out.out and err.out are NULL). */
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struct support_capture_subprocess support_capture_subprocess
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(void (*callback) (void *), void *closure);
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/* Issue FILE with ARGV arguments and ENVP environments by using posix_spawn
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and capture standard output, standard error, and the exit status. If
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ENVP is NULL the current environment variable is used. The out.buffer and
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err.buffer are handle by support_capture_subprocess. */
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struct support_capture_subprocess support_capture_subprogram
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(const char *file, char *const argv[], char *const envp[]);
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/* Copy the running program into a setgid binary and run it with
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CHILD_ID argument. If the program exits with a non-zero status,
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exit with that exit status (or status 1 if the program did not exit
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normally). If the test cannot be performed, exit with
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EXIT_UNSUPPORTED. */
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void support_capture_subprogram_self_sgid (const char *child_id);
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/* Deallocate the subprocess data captured by
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support_capture_subprocess. */
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void support_capture_subprocess_free (struct support_capture_subprocess *);
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enum support_capture_allow
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{
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/* No output is allowed. */
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sc_allow_none = 0x01,
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/* Output to stdout is permitted. */
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sc_allow_stdout = 0x02,
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/* Output to standard error is permitted. */
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sc_allow_stderr = 0x04,
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};
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/* Check that the subprocess exited and that only the allowed outputs
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happened. If STATUS_OR_SIGNAL is nonnegative, it is the expected
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(decoded) exit status of the process, as returned by WEXITSTATUS.
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If STATUS_OR_SIGNAL is negative, -STATUS_OR_SIGNAL is the expected
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termination signal, as returned by WTERMSIG. ALLOWED is a
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combination of support_capture_allow flags. Report errors under
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the CONTEXT message. */
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void support_capture_subprocess_check (struct support_capture_subprocess *,
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const char *context,
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int status_or_signal, int allowed)
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__attribute__ ((nonnull (1, 2)));
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#endif /* SUPPORT_CAPTURE_SUBPROCESS_H */
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