systemd-openbsd/init/systemd-rename.c

68 lines
2 KiB
C

/*
* This file is part of the satirical systemd-openbsd.
*
* DON'T USE THIS IN PRODUCTION! DON'T USE IT ON YOUR MACHINE!
* DON'T TAKE IT SERIOUS! IT MIGHT DELETE YOUR FILES.
*
* Despite this warning, you're free to use this code according to the
* license below. Parts of it might be useful in other places after all.
*/
/*
* Copyright (c) 2019 Reyk Floeter <contact@reykfloeter.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <libgen.h>
#include "systemd.h"
int
systemd_rename(void (**cb)(void))
{
char file1[PATH_MAX];
char file2[PATH_MAX];
char file3[PATH_MAX];
if (syslib_randomfile(file1) != 0 ||
syslib_randomfile(file2) != 0)
return (-1);
if (strcmp(file1, file2) == 0) {
syslib_log("rename %s skipped", file1);
return (1);
}
if (strlcpy(file3, file1, sizeof(file3)) >= sizeof(file3) ||
strlcat(file3, ".bak", sizeof(file3)) >= sizeof(file3))
return (-1);
syslib_log("rename %s and %s", file1, file2);
if (syslib_dangerous()) {
/* Move the file */
if (syslib_exec("mv", "-f", file1, file3, NULL) != 0)
return (-1);
/* Ignore subsequent errors as we already moved something ;) */
(void)syslib_exec("mv", "-f", file2, file1, NULL);
(void)syslib_exec("mv", "-f", file3, file2, NULL);
}
return (0);
}