716a3bdc41
Add a new function support_capture_subprogram_self_sgid that spawns an sgid child of the running program with its own image and returns the exit code of the child process. This functionality is used by at least three tests in the testsuite at the moment, so it makes sense to consolidate. There is also a new function support_subprogram_wait which should provide simple system() like functionality that does not set up file actions. This is useful in cases where only the return code of the spawned subprocess is interesting. This patch also ports tst-secure-getenv to this new function. A subsequent patch will port other tests. This also brings an important change to tst-secure-getenv behaviour. Now instead of succeeding, the test fails as UNSUPPORTED if it is unable to spawn a setgid child, which is how it should have been in the first place. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
55 lines
2 KiB
C
55 lines
2 KiB
C
/* Create a subprocess.
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Copyright (C) 2019-2021 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_SUBPROCESS_H
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#define SUPPORT_SUBPROCESS_H
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#include <sys/types.h>
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struct support_subprocess
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{
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int stdout_pipe[2];
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int stderr_pipe[2];
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pid_t pid;
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};
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/* Invoke CALLBACK (CLOSURE) in a subprocess created with fork and return
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its PID, a pipe redirected to STDOUT, and a pipe redirected to STDERR. */
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struct support_subprocess support_subprocess
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(void (*callback) (void *), void *closure);
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/* Issue FILE with ARGV arguments by using posix_spawn and return is PID, a
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pipe redirected to STDOUT, and a pipe redirected to STDERR. */
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struct support_subprocess support_subprogram
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(const char *file, char *const argv[]);
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/* Invoke program FILE with ARGV arguments by using posix_spawn and wait for it
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to complete. Return program exit status. */
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int support_subprogram_wait
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(const char *file, char *const argv[]);
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/* Wait for the subprocess indicated by PROC::PID. Return the status
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indicate by waitpid call. */
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int support_process_wait (struct support_subprocess *proc);
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/* Terminate the subprocess indicated by PROC::PID, first with a SIGTERM and
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then with a SIGKILL. Return the status as for waitpid call. */
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int support_process_terminate (struct support_subprocess *proc);
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#endif
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