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/*
* Check decoding of ioctl TIOCM* commands.
*
* Copyright (c) 2020-2022 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <errno.h>
#include <stdio.h>
#include <sys/ioctl.h>
static const char *errstr;
static int
do_ioctl(kernel_ulong_t cmd, kernel_ulong_t arg)
{
int rc = ioctl(-1, cmd, arg);
errstr = sprintrc(rc);
return rc;
}
static int
do_ioctl_ptr(kernel_ulong_t cmd, const void *arg)
{
return do_ioctl(cmd, (uintptr_t) arg);
}
int
main(int argc, const char *argv[])
{
static const struct {
uint32_t cmd;
const char *str;
bool on_enter;
bool on_exit;
} cmds[] = {
{ ARG_STR(TIOCMGET), false, true },
{ ARG_STR(TIOCMBIS), true, false },
{ ARG_STR(TIOCMBIC), true, false },
{ ARG_STR(TIOCMSET), true, false },
};
TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, p_flags);
const void *const efault = p_flags + 1;
for (size_t i = 0; i < ARRAY_SIZE(cmds); ++i) {
do_ioctl(cmds[i].cmd, 0);
printf("ioctl(-1, " XLAT_FMT ", NULL) = %s\n",
XLAT_SEL(cmds[i].cmd, cmds[i].str), errstr);
do_ioctl_ptr(cmds[i].cmd, efault);
printf("ioctl(-1, " XLAT_FMT ", %p) = %s\n",
XLAT_SEL(cmds[i].cmd, cmds[i].str),
efault, errstr);
#ifdef __mips__
# define VALID_FLAGS 0xe777
# define INVALID_FLAGS 0xffff1888
#else
# define VALID_FLAGS 0xe1ff
# define INVALID_FLAGS 0xffff1e00
#endif
*p_flags = INVALID_FLAGS;
if (cmds[i].on_enter) {
do_ioctl_ptr(cmds[i].cmd, p_flags);
printf("ioctl(-1, " XLAT_FMT ", [%s]) = %s\n",
XLAT_SEL(cmds[i].cmd, cmds[i].str),
XLAT_UNKNOWN(INVALID_FLAGS, "TIOCM_???"),
errstr);
*p_flags = ~*p_flags;
do_ioctl_ptr(cmds[i].cmd, p_flags);
printf("ioctl(-1, " XLAT_FMT ", [%s]) = %s\n",
XLAT_SEL(cmds[i].cmd, cmds[i].str),
XLAT_KNOWN(VALID_FLAGS,
"TIOCM_LE|"
"TIOCM_DTR|"
"TIOCM_RTS|"
"TIOCM_ST|"
"TIOCM_SR|"
"TIOCM_CTS|"
"TIOCM_CAR|"
"TIOCM_RNG|"
"TIOCM_DSR|"
"TIOCM_OUT1|"
"TIOCM_OUT2|"
"TIOCM_LOOP"),
errstr);
} else if (cmds[i].on_exit) {
do_ioctl_ptr(cmds[i].cmd, p_flags);
printf("ioctl(-1, " XLAT_FMT ", %p) = %s\n",
XLAT_SEL(cmds[i].cmd, cmds[i].str),
p_flags, errstr);
}
}
puts("+++ exited with 0 +++");
return 0;
}
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