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/*
* Check decoding of inotify_init1 syscall.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#if defined(__NR_inotify_init1)
# include <stdio.h>
# include <unistd.h>
# include "kernel_fcntl.h"
# define all_flags (O_NONBLOCK | O_CLOEXEC)
# ifdef PRINT_PATHS
# define RC_FMT "%ld<%s>"
# else
# define RC_FMT "%s"
# endif
int
main(void)
{
# ifdef PRINT_PATHS
skip_if_unavailable("/proc/self/fd/");
# endif
static const kernel_ulong_t bogus_flags1 =
(kernel_ulong_t) 0xfacefeeddeadbeefULL | O_NONBLOCK;
static const kernel_ulong_t bogus_flags2 =
(kernel_ulong_t) 0x55555550ff96b77bULL & ~all_flags;
long rc;
rc = syscall(__NR_inotify_init1, bogus_flags1);
printf("inotify_init1(IN_NONBLOCK|%s%#x) = %s\n",
bogus_flags1 & O_CLOEXEC ? "IN_CLOEXEC|" : "",
(unsigned int) (bogus_flags1 & ~all_flags),
sprintrc(rc));
rc = syscall(__NR_inotify_init1, bogus_flags2);
printf("inotify_init1(%#x /* IN_??? */) = %s\n",
(unsigned int) bogus_flags2, sprintrc(rc));
rc = syscall(__NR_inotify_init1, all_flags);
# ifdef PRINT_PATHS
if (rc < 0)
perror_msg_and_skip("inotify_init(%#x)", all_flags);
/*
* Kernels that do not have v2.6.33-rc1~34^2~7 do not have
* "anon_inode:" prefix. Let's assume that it can be either "inotify"
* or "anon_inode:inotify" for now, as any change there may be
* of interest.
*/
char path[sizeof("/proc/self/fd/") + sizeof(rc) * 3];
char buf[2] = "";
const char *inotify_path;
ssize_t ret;
ret = snprintf(path, sizeof(path), "/proc/self/fd/%ld", rc);
if ((ret < 0) || ((size_t) ret >= sizeof(path)))
perror_msg_and_fail("snprintf(path)");
ret = readlink(path, buf, sizeof(buf));
if (ret < 0)
perror_msg_and_fail("readlink");
switch (buf[0]) {
case 'a':
inotify_path = "anon_inode:inotify";
break;
case 'i':
inotify_path = "inotify";
break;
default:
error_msg_and_fail("Unexpected first char '%c' of inotify fd "
"link path", buf[0]);
}
# endif
printf("inotify_init1(IN_NONBLOCK|IN_CLOEXEC) = " RC_FMT "\n",
# ifdef PRINT_PATHS
rc, inotify_path
# else
sprintrc(rc)
# endif
);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_inotify_init1");
#endif
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