Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
43 lines
861 B
C
43 lines
861 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Write in a pipe and wait.
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*
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* Used by layout1.umount_sandboxer from fs_test.c
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*
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* Copyright © 2024-2025 Microsoft Corporation
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int main(int argc, char *argv[])
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{
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int pipe_child, pipe_parent;
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char buf;
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/* The first argument must be the file descriptor number of a pipe. */
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if (argc != 3) {
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fprintf(stderr, "Wrong number of arguments (not two)\n");
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return 1;
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}
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pipe_child = atoi(argv[1]);
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pipe_parent = atoi(argv[2]);
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/* Signals that we are waiting. */
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if (write(pipe_child, ".", 1) != 1) {
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perror("Failed to write to first argument");
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return 1;
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}
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/* Waits for the parent do its test. */
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if (read(pipe_parent, &buf, 1) != 1) {
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perror("Failed to write to the second argument");
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return 1;
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}
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return 0;
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}
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