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/*
* Check decoding of setreuid/setregid/setreuid32/setregid32 syscalls.
*
* Copyright (c) 2016-2021 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
static int
ugid2int(const unsigned UGID_TYPE ugid)
{
if ((unsigned UGID_TYPE) -1U == ugid)
return -1;
else
return ugid;
}
static void
print_int(const unsigned int num)
{
if (num == -1U)
printf("-1");
else
printf("%u", num);
}
static int
num_matches_id(const unsigned int num, const unsigned int ugid)
{
return num == ugid || num == -1U;
}
#define PAIR(val) { val, ugid }, { ugid, val }
int
main(void)
{
unsigned int ugid = GETUGID;
CHECK_OVERFLOWUGID(ugid);
const struct {
const long r, e;
} tests[] = {
{ ugid, ugid },
PAIR((unsigned long) 0xffffffff00000000ULL | ugid),
PAIR(-1U),
PAIR(-1L),
PAIR(0xffff0000U | ugid),
PAIR(0xffff),
PAIR(0xc0deffffU)
};
for (unsigned int i = 0; i < ARRAY_SIZE(tests); ++i) {
const unsigned int rn = ugid2int(tests[i].r);
const unsigned int en = ugid2int(tests[i].e);
if (!num_matches_id(rn, ugid) || !num_matches_id(en, ugid))
continue;
if (syscall(SYSCALL_NR, tests[i].r, tests[i].e)) {
if (!i && ENOSYS == errno) {
printf("%s(%u, %u) = -1 ENOSYS (%m)\n",
SYSCALL_NAME, ugid, ugid);
break;
}
perror_msg_and_fail("%s(%#lx, %#lx)", SYSCALL_NAME,
tests[i].r, tests[i].e);
}
printf("%s(", SYSCALL_NAME);
print_int(rn);
printf(", ");
print_int(en);
printf(") = 0\n");
}
puts("+++ exited with 0 +++");
return 0;
}
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