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/*
* Check decoding of dup2 syscall.
*
* Copyright (c) 2016-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#ifdef __NR_dup2
# include <stdio.h>
# include <unistd.h>
# ifndef FD0_PATH
# define FD0_PATH ""
# endif
# ifndef FD9_PATH
# define FD9_PATH ""
# endif
# ifndef SKIP_IF_PROC_IS_UNAVAILABLE
# define SKIP_IF_PROC_IS_UNAVAILABLE
# endif
static const char *errstr;
static long
k_dup2(const unsigned int fd1, const unsigned int fd2)
{
const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
const kernel_ulong_t arg1 = fill | fd1;
const kernel_ulong_t arg2 = fill | fd2;
const long rc = syscall(__NR_dup2, arg1, arg2, bad, bad, bad, bad);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
SKIP_IF_PROC_IS_UNAVAILABLE;
int fd0 = dup(0);
int fd9 = dup(9);
if (k_dup2(0, 0))
perror_msg_and_skip("dup2");
# ifndef PATH_TRACING
printf("dup2(0" FD0_PATH ", 0" FD0_PATH ") = 0" FD0_PATH "\n");
# endif
k_dup2(-1, -2);
# ifndef PATH_TRACING
printf("dup2(-1, -2) = %s\n", errstr);
# endif
k_dup2(-2, -1);
# ifndef PATH_TRACING
printf("dup2(-2, -1) = %s\n", errstr);
# endif
k_dup2(-3, 0);
# ifndef PATH_TRACING
printf("dup2(-3, 0" FD0_PATH ") = %s\n", errstr);
# endif
k_dup2(0, -4);
# ifndef PATH_TRACING
printf("dup2(0" FD0_PATH ", -4) = %s\n", errstr);
# endif
k_dup2(-5, 9);
printf("dup2(-5, 9" FD9_PATH ") = %s\n", errstr);
k_dup2(9, -6);
printf("dup2(9" FD9_PATH ", -6) = %s\n", errstr);
k_dup2(9, 9);
printf("dup2(9" FD9_PATH ", 9" FD9_PATH ") = 9" FD9_PATH "\n");
k_dup2(0, fd0);
# ifndef PATH_TRACING
printf("dup2(0" FD0_PATH ", %d" FD0_PATH ") = %d" FD0_PATH "\n",
fd0, fd0);
# endif
k_dup2(9, fd9);
printf("dup2(9" FD9_PATH ", %d" FD9_PATH ") = %d" FD9_PATH "\n",
fd9, fd9);
k_dup2(0, fd9);
printf("dup2(0" FD0_PATH ", %d" FD9_PATH ") = %d" FD0_PATH "\n",
fd9, fd9);
k_dup2(9, fd0);
printf("dup2(9" FD9_PATH ", %d" FD0_PATH ") = %d" FD9_PATH "\n",
fd0, fd0);
close(fd0);
close(fd9);
k_dup2(0, fd0);
# ifndef PATH_TRACING
printf("dup2(0" FD0_PATH ", %d) = %d" FD0_PATH "\n",
fd0, fd0);
# endif
k_dup2(9, fd9);
printf("dup2(9" FD9_PATH ", %d) = %d" FD9_PATH "\n",
fd9, fd9);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_dup2")
#endif
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