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/*
* Check decoding of setgroups/setgroups32 syscalls.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifdef __NR_setgroups32
# define SYSCALL_NR __NR_setgroups32
# define SYSCALL_NAME "setgroups32"
# define GID_TYPE unsigned int
#else /* __NR_setgroups */
# include "tests.h"
# include "scno.h"
# define SYSCALL_NR __NR_setgroups
# define SYSCALL_NAME "setgroups"
# if defined __NR_setgroups32 && __NR_setgroups != __NR_setgroups32
# define GID_TYPE unsigned short
# else
# define GID_TYPE unsigned int
# endif
#endif
#include <stdio.h>
#include <unistd.h>
static void
printuid(GID_TYPE id)
{
if (id == (GID_TYPE) -1U)
printf("-1");
else
printf("%u", id);
}
int
main(void)
{
const char *errstr;
/* check how the first argument is decoded */
long rc = syscall(SYSCALL_NR, 0, 0);
printf("%s(0, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
rc = syscall(SYSCALL_NR, F8ILL_KULONG_MASK, 0);
printf("%s(0, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
rc = syscall(SYSCALL_NR, 1, 0);
printf("%s(1, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
rc = syscall(SYSCALL_NR, (long) 0xffffffff00000001ULL, 0);
printf("%s(1, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
rc = syscall(SYSCALL_NR, -1U, 0);
printf("%s(%d, NULL) = %s\n", SYSCALL_NAME, -1, sprintrc(rc));
rc = syscall(SYSCALL_NR, -1L, 0);
printf("%s(%d, NULL) = %s\n", SYSCALL_NAME, -1, sprintrc(rc));
/* check how the second argument is decoded */
TAIL_ALLOC_OBJECT_CONST_PTR(const GID_TYPE, g1);
GID_TYPE *const g2 = tail_alloc(sizeof(*g2) * 2);
GID_TYPE *const g3 = tail_alloc(sizeof(*g3) * 3);
rc = syscall(SYSCALL_NR, 0, g1 + 1);
printf("%s(0, []) = %s\n", SYSCALL_NAME, sprintrc(rc));
rc = syscall(SYSCALL_NR, 1, g1);
errstr = sprintrc(rc);
printf("%s(1, [", SYSCALL_NAME);
printuid(*g1);
printf("]) = %s\n", errstr);
rc = syscall(SYSCALL_NR, 1, g1 + 1);
printf("%s(1, %p) = %s\n", SYSCALL_NAME, g1 + 1, sprintrc(rc));
rc = syscall(SYSCALL_NR, 1, -1L);
printf("%s(1, %#lx) = %s\n", SYSCALL_NAME, -1L, sprintrc(rc));
rc = syscall(SYSCALL_NR, 2, g1);
errstr = sprintrc(rc);
printf("%s(2, [", SYSCALL_NAME);
printuid(*g1);
printf(", ... /* %p */]) = %s\n", g1 + 1, errstr);
g2[0] = -2;
g2[1] = -3;
rc = syscall(SYSCALL_NR, 2, g2);
errstr = sprintrc(rc);
printf("%s(2, [", SYSCALL_NAME);
printuid(g2[0]);
printf(", ");
printuid(g2[1]);
printf("]) = %s\n", errstr);
rc = syscall(SYSCALL_NR, 3, g2);
errstr = sprintrc(rc);
printf("%s(3, [", SYSCALL_NAME);
printuid(g2[0]);
printf(", ");
printuid(g2[1]);
printf(", ... /* %p */]) = %s\n", g2 + 2, errstr);
g3[0] = 0;
g3[1] = 1;
rc = syscall(SYSCALL_NR, 3, g3);
errstr = sprintrc(rc);
printf("%s(3, [", SYSCALL_NAME);
printuid(g3[0]);
printf(", ");
printuid(g3[1]);
printf(", ...]) = %s\n", errstr);
rc = syscall(SYSCALL_NR, 4, g3);
errstr = sprintrc(rc);
printf("%s(4, [", SYSCALL_NAME);
printuid(g3[0]);
printf(", ");
printuid(g3[1]);
printf(", ...]) = %s\n", errstr);
rc = sysconf(_SC_NGROUPS_MAX);
const unsigned ngroups_max = rc;
if ((unsigned long) rc == ngroups_max && (int) ngroups_max > 0) {
rc = syscall(SYSCALL_NR, ngroups_max, g3);
errstr = sprintrc(rc);
printf("%s(%d, [", SYSCALL_NAME, ngroups_max);
printuid(g3[0]);
printf(", ");
printuid(g3[1]);
printf(", ...]) = %s\n", errstr);
rc = syscall(SYSCALL_NR, F8ILL_KULONG_MASK | ngroups_max, g3);
errstr = sprintrc(rc);
printf("%s(%d, [", SYSCALL_NAME, ngroups_max);
printuid(g3[0]);
printf(", ");
printuid(g3[1]);
printf(", ...]) = %s\n", errstr);
rc = syscall(SYSCALL_NR, ngroups_max + 1, g3);
printf("%s(%d, %p) = %s\n", SYSCALL_NAME,
ngroups_max + 1, g3, sprintrc(rc));
}
puts("+++ exited with 0 +++");
return 0;
}
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