/*
 * Check decoding of dup3 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_dup3

# include <fcntl.h>
# include <stdio.h>
# include <unistd.h>

# ifndef O_CLOEXEC
#  if defined __alpha__ || defined __hppa__
#   define O_CLOEXEC	010000000
#  elif defined __sparc__
#   define O_CLOEXEC	020000000
#  else
#   define O_CLOEXEC	02000000
#  endif
# endif /* !O_CLOEXEC */

# ifndef FD0_PATH
#  define FD0_PATH ""
# endif
# ifndef FD7_PATH
#  define FD7_PATH ""
# endif
# ifndef SKIP_IF_PROC_IS_UNAVAILABLE
#  define SKIP_IF_PROC_IS_UNAVAILABLE
# endif

static const char *errstr;

static long
k_dup3(const unsigned int fd1, const unsigned int fd2, const unsigned int flags)
{
	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 kernel_ulong_t arg3 = fill | flags;
	const long rc = syscall(__NR_dup3, arg1, arg2, arg3, bad, bad, bad);
	errstr = sprintrc(rc);
	return rc;
}

int
main(void)
{
	SKIP_IF_PROC_IS_UNAVAILABLE;

	int fd0 = dup(0);
	int fd7 = dup(7);

	k_dup3(0, 0, 0);
# ifndef PATH_TRACING
	printf("dup3(0" FD0_PATH ", 0" FD0_PATH ", 0) = %s\n", errstr);
# endif

	k_dup3(-1, -2, O_CLOEXEC);
# ifndef PATH_TRACING
	printf("dup3(-1, -2, O_CLOEXEC) = %s\n", errstr);
# endif

	k_dup3(-2, -1, O_TRUNC);
# ifndef PATH_TRACING
	printf("dup3(-2, -1, O_TRUNC) = %s\n", errstr);
# endif

	k_dup3(-3, 0, O_TRUNC | O_CLOEXEC);
# ifndef PATH_TRACING
	printf("dup3(-3, 0" FD0_PATH ", O_TRUNC|O_CLOEXEC) = %s\n", errstr);
# endif

	k_dup3(0, -4, O_RDONLY);
# ifndef PATH_TRACING
	printf("dup3(0" FD0_PATH ", -4, 0) = %s\n", errstr);
# endif

	k_dup3(-5, 7, O_WRONLY);
	printf("dup3(-5, 7" FD7_PATH ", 0x1 /* O_??? */) = %s\n", errstr);

	k_dup3(7, -6, O_RDWR);
	printf("dup3(7" FD7_PATH ", -6, 0x2 /* O_??? */) = %s\n", errstr);

	k_dup3(7, 7, O_CLOEXEC);
	printf("dup3(7" FD7_PATH ", 7" FD7_PATH ", O_CLOEXEC) = %s\n", errstr);

	k_dup3(-7, -7, 7);
# ifndef PATH_TRACING
	printf("dup3(-7, -7, %s) = %s\n",
#  ifdef __sparc__
	       "O_NDELAY|0x3"
#  else
	       "0x7 /* O_??? */"
#  endif
	       , errstr);
# endif

	if (k_dup3(0, fd0, O_CLOEXEC) != fd0)
		perror_msg_and_skip("dup3");
# ifndef PATH_TRACING
	printf("dup3(0" FD0_PATH ", %d" FD0_PATH ", O_CLOEXEC) = %d" FD0_PATH
	       "\n", fd0, fd0);
# endif

	k_dup3(7, fd7, 0);
	printf("dup3(7" FD7_PATH ", %d" FD7_PATH ", 0) = %d" FD7_PATH
	       "\n", fd7, fd7);

	k_dup3(0, fd7, O_CLOEXEC);
	printf("dup3(0" FD0_PATH ", %d" FD7_PATH ", O_CLOEXEC) = %d" FD0_PATH
	       "\n", fd7, fd7);

	k_dup3(7, fd0, 0);
	printf("dup3(7" FD7_PATH ", %d" FD0_PATH ", 0) = %d" FD7_PATH
	       "\n", fd0, fd0);

	close(fd0);
	close(fd7);

	k_dup3(0, fd0, O_CLOEXEC);
# ifndef PATH_TRACING
	printf("dup3(0" FD0_PATH ", %d, O_CLOEXEC) = %d" FD0_PATH "\n",
	       fd0, fd0);
# endif

	k_dup3(7, fd7, 0);
	printf("dup3(7" FD7_PATH ", %d, 0) = %d" FD7_PATH "\n",
	       fd7, fd7);

	puts("+++ exited with 0 +++");
	return 0;
}

#else

SKIP_MAIN_UNDEFINED("__NR_dup3")

#endif