77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/*
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* Check decoding of fchownat syscall.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <sys/syscall.h>
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#include <fcntl.h>
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#if defined __NR_fchownat && defined AT_FDCWD && defined AT_SYMLINK_NOFOLLOW
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# include <errno.h>
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# include <stdio.h>
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# include <unistd.h>
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int
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main(void)
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{
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static const char sample[] = "fchownat_sample";
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uid_t uid = geteuid();
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uid_t gid = getegid();
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if (open(sample, O_RDONLY | O_CREAT, 0400) == -1)
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perror_msg_and_fail("open");
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long rc = syscall(__NR_fchownat, AT_FDCWD, sample, uid, gid, 0);
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if (rc == 0) {
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printf("fchownat(AT_FDCWD, \"%s\", %d, %d, 0) = 0\n",
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sample, uid, gid);
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if (unlink(sample))
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perror_msg_and_fail("unlink");
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rc = syscall(__NR_fchownat, AT_FDCWD,
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sample, -1, -1L, AT_SYMLINK_NOFOLLOW);
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printf("fchownat(AT_FDCWD, \"%s\", -1, -1, AT_SYMLINK_NOFOLLOW)"
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" = %ld %s (%m)\n", sample, rc, errno2name());
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} else {
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printf("fchownat(AT_FDCWD, \"%s\", %d, %d, 0)"
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" = %ld %s (%m)\n", sample, uid, gid, rc, errno2name());
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_fchownat && AT_FDCWD && AT_SYMLINK_NOFOLLOW")
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#endif
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