96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*
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* Check decoding of setuid/setgid/setuid32/setgid32 syscalls.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2018 The strace developers.
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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 <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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void
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printuid(unsigned UGID_TYPE id)
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{
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if (id == (unsigned UGID_TYPE) -1U)
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printf("-1");
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else
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printf("%u", id);
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}
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int
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main(void)
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{
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unsigned int ugid = GETUGID;
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CHECK_OVERFLOWUGID(ugid);
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const long tests[] = {
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ugid,
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0xffff0000U | ugid,
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(unsigned long) 0xffffffff00000000ULL | ugid,
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0xffffU,
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-1U,
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-1L
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};
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(tests); ++i) {
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const unsigned int num = (unsigned UGID_TYPE) tests[i];
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long expected;
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errno = 0;
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if (num == ugid)
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expected = 0;
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else if ((UGID_TYPE) num == (UGID_TYPE) -1U)
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expected = -1;
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else
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continue;
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const long rc = syscall(SYSCALL_NR, tests[i]);
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const char *errstr = sprintrc(rc);
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if (rc != expected) {
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if (!i && ENOSYS == errno) {
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printf("%s(%u) = %s\n",
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SYSCALL_NAME, ugid, errstr);
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break;
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}
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perror_msg_and_fail("%s(%#lx) = %ld != %ld",
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SYSCALL_NAME, tests[i],
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rc, expected);
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}
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printf("%s(", SYSCALL_NAME);
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printuid(num);
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printf(") = %s\n", errstr);
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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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