38 lines
763 B
C
38 lines
763 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Program that atomically exchanges two paths using
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* the renameat2() system call RENAME_EXCHANGE flag.
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*
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* Copyright 2022 Red Hat Inc.
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* Author: Javier Martinez Canillas <javierm@redhat.com>
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*/
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#define _GNU_SOURCE
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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void print_usage(const char *program)
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{
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printf("Usage: %s [oldpath] [newpath]\n", program);
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printf("Atomically exchange oldpath and newpath\n");
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}
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int main(int argc, char *argv[])
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{
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int ret;
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if (argc != 3) {
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print_usage(argv[0]);
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exit(EXIT_FAILURE);
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}
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ret = renameat2(AT_FDCWD, argv[1], AT_FDCWD, argv[2], RENAME_EXCHANGE);
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if (ret) {
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perror("rename exchange failed");
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exit(EXIT_FAILURE);
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}
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exit(EXIT_SUCCESS);
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}
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