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/*
* Check printing of character/block device numbers in -yy mode.
*
* Copyright (c) 2018-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <stdio.h>
#include <unistd.h>
#include "scno.h"
#include <linux/fcntl.h>
#include <sys/sysmacros.h>
#ifndef PRINT_DEVNUM
# define PRINT_DEVNUM 1
#endif
#if PRINT_DEVNUM
# define DEV_FMT "<%s<%s %u:%u>>"
#else
# define DEV_FMT "<%s>"
#endif
#if defined __NR_openat && defined O_PATH
int
main(void)
{
skip_if_unavailable("/proc/self/fd/");
static const struct {
const char *path;
unsigned int major;
unsigned int minor;
bool blk;
bool optional;
} checks[] = {
{ "/dev/zero", 1, 5, false, false },
{ "/dev/full", 1, 7, false, false },
{ "/dev/sda", 8, 0, true, true },
};
for (unsigned int i = 0; i < ARRAY_SIZE(checks); i++) {
/*
* We can't have nice things here and call openat() directly as
* some libcs (yes, musl, I'm looking at you now) are too
* frivolous in passing flags to the kernel.
*/
long fd = syscall(__NR_openat, AT_FDCWD, checks[i].path,
O_RDONLY|O_PATH);
printf("openat(AT_FDCWD, \"%s\", O_RDONLY|O_PATH) = %s",
checks[i].path, sprintrc(fd));
if (fd >= 0)
printf(DEV_FMT,
checks[i].path
# if PRINT_DEVNUM
, checks[i].blk ? "block" : "char",
checks[i].major, checks[i].minor
# endif
);
puts("");
if (fd < 0) {
if (checks[i].optional)
continue;
else
perror_msg_and_fail("openat(\"%s\")",
checks[i].path);
}
int rc = fsync(fd);
printf("fsync(%ld" DEV_FMT ") = %s\n",
fd, checks[i].path,
# if PRINT_DEVNUM
checks[i].blk ? "block" : "char",
checks[i].major, checks[i].minor,
# endif
sprintrc(rc));
close(fd);
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_openat && O_PATH")
#endif
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