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use libc::{_exit, mode_t, off_t};
use nix::errno::Errno;
#[cfg(not(any(target_os = "redox", target_os = "haiku")))]
use nix::fcntl::readlink;
use nix::fcntl::OFlag;
#[cfg(not(target_os = "redox"))]
use nix::fcntl::{self, open};
#[cfg(not(any(
target_os = "redox",
target_os = "fuchsia",
target_os = "haiku"
)))]
use nix::pty::{grantpt, posix_openpt, ptsname, unlockpt};
#[cfg(not(target_os = "redox"))]
use nix::sys::signal::{
sigaction, SaFlags, SigAction, SigHandler, SigSet, Signal,
};
use nix::sys::stat::{self, Mode, SFlag};
use nix::sys::wait::*;
use nix::unistd::ForkResult::*;
use nix::unistd::*;
use std::env;
#[cfg(not(any(target_os = "fuchsia", target_os = "redox")))]
use std::ffi::CString;
#[cfg(not(target_os = "redox"))]
use std::fs::DirBuilder;
use std::fs::{self, File};
use std::io::Write;
use std::os::unix::prelude::*;
#[cfg(not(any(
target_os = "fuchsia",
target_os = "redox",
target_os = "haiku"
)))]
use std::path::Path;
use tempfile::{tempdir, tempfile};
use crate::*;
#[test]
#[cfg(not(any(target_os = "netbsd")))]
fn test_fork_and_waitpid() {
let _m = crate::FORK_MTX.lock();
// Safe: Child only calls `_exit`, which is signal-safe
match unsafe { fork() }.expect("Error: Fork Failed") {
Child => unsafe { _exit(0) },
Parent { child } => {
// assert that child was created and pid > 0
let child_raw: ::libc::pid_t = child.into();
assert!(child_raw > 0);
let wait_status = waitpid(child, None);
match wait_status {
// assert that waitpid returned correct status and the pid is the one of the child
Ok(WaitStatus::Exited(pid_t, _)) => assert_eq!(pid_t, child),
// panic, must never happen
s @ Ok(_) => {
panic!("Child exited {s:?}, should never happen")
}
// panic, waitpid should never fail
Err(s) => panic!("Error: waitpid returned Err({s:?}"),
}
}
}
}
#[test]
#[cfg(target_os = "freebsd")]
fn test_rfork_and_waitpid() {
let _m = crate::FORK_MTX.lock();
// Safe: Child only calls `_exit`, which is signal-safe
match unsafe { rfork(RforkFlags::RFPROC | RforkFlags::RFTHREAD) }
.expect("Error: Rfork Failed")
{
Child => unsafe { _exit(0) },
Parent { child } => {
// assert that child was created and pid > 0
let child_raw: ::libc::pid_t = child.into();
assert!(child_raw > 0);
let wait_status = waitpid(child, None);
match wait_status {
// assert that waitpid returned correct status and the pid is the one of the child
Ok(WaitStatus::Exited(pid_t, _)) => assert_eq!(pid_t, child),
// panic, must never happen
s @ Ok(_) => {
panic!("Child exited {s:?}, should never happen")
}
// panic, waitpid should never fail
Err(s) => panic!("Error: waitpid returned Err({s:?}"),
}
}
}
}
#[test]
fn test_wait() {
// Grab FORK_MTX so wait doesn't reap a different test's child process
let _m = crate::FORK_MTX.lock();
// Safe: Child only calls `_exit`, which is signal-safe
match unsafe { fork() }.expect("Error: Fork Failed") {
Child => unsafe { _exit(0) },
Parent { child } => {
let wait_status = wait();
// just assert that (any) one child returns with WaitStatus::Exited
assert_eq!(wait_status, Ok(WaitStatus::Exited(child, 0)));
}
}
}
#[test]
fn test_mkstemp() {
let mut path = env::temp_dir();
path.push("nix_tempfile.XXXXXX");
let result = mkstemp(&path);
match result {
Ok((fd, path)) => {
close(fd).unwrap();
unlink(path.as_path()).unwrap();
}
Err(e) => panic!("mkstemp failed: {e}"),
}
}
#[test]
fn test_mkstemp_directory() {
// mkstemp should fail if a directory is given
mkstemp(&env::temp_dir()).expect_err("assertion failed");
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_mkfifo() {
let tempdir = tempdir().unwrap();
let mkfifo_fifo = tempdir.path().join("mkfifo_fifo");
mkfifo(&mkfifo_fifo, Mode::S_IRUSR).unwrap();
let stats = stat::stat(&mkfifo_fifo).unwrap();
let typ = stat::SFlag::from_bits_truncate(stats.st_mode as mode_t);
assert_eq!(typ, SFlag::S_IFIFO);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_mkfifo_directory() {
// mkfifo should fail if a directory is given
mkfifo(&env::temp_dir(), Mode::S_IRUSR).expect_err("assertion failed");
}
#[test]
#[cfg(not(any(
apple_targets,
target_os = "android",
target_os = "redox",
target_os = "haiku"
)))]
fn test_mkfifoat_none() {
let _m = crate::CWD_LOCK.read();
let tempdir = tempdir().unwrap();
let mkfifoat_fifo = tempdir.path().join("mkfifoat_fifo");
mkfifoat(None, &mkfifoat_fifo, Mode::S_IRUSR).unwrap();
let stats = stat::stat(&mkfifoat_fifo).unwrap();
let typ = stat::SFlag::from_bits_truncate(stats.st_mode);
assert_eq!(typ, SFlag::S_IFIFO);
}
#[test]
#[cfg(not(any(
apple_targets,
target_os = "android",
target_os = "redox",
target_os = "haiku"
)))]
fn test_mkfifoat() {
use nix::fcntl;
let tempdir = tempdir().unwrap();
let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
let mkfifoat_name = "mkfifoat_name";
mkfifoat(Some(dirfd), mkfifoat_name, Mode::S_IRUSR).unwrap();
let stats =
stat::fstatat(Some(dirfd), mkfifoat_name, fcntl::AtFlags::empty())
.unwrap();
let typ = stat::SFlag::from_bits_truncate(stats.st_mode);
assert_eq!(typ, SFlag::S_IFIFO);
}
#[test]
#[cfg(not(any(
apple_targets,
target_os = "android",
target_os = "redox",
target_os = "haiku"
)))]
fn test_mkfifoat_directory_none() {
let _m = crate::CWD_LOCK.read();
// mkfifoat should fail if a directory is given
mkfifoat(None, &env::temp_dir(), Mode::S_IRUSR)
.expect_err("assertion failed");
}
#[test]
#[cfg(not(any(
apple_targets,
target_os = "android",
target_os = "redox",
target_os = "haiku"
)))]
fn test_mkfifoat_directory() {
// mkfifoat should fail if a directory is given
let tempdir = tempdir().unwrap();
let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
let mkfifoat_dir = "mkfifoat_dir";
stat::mkdirat(Some(dirfd), mkfifoat_dir, Mode::S_IRUSR).unwrap();
mkfifoat(Some(dirfd), mkfifoat_dir, Mode::S_IRUSR)
.expect_err("assertion failed");
}
#[test]
fn test_getpid() {
let pid: ::libc::pid_t = getpid().into();
let ppid: ::libc::pid_t = getppid().into();
assert!(pid > 0);
assert!(ppid > 0);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_getsid() {
let none_sid: ::libc::pid_t = getsid(None).unwrap().into();
let pid_sid: ::libc::pid_t = getsid(Some(getpid())).unwrap().into();
assert!(none_sid > 0);
assert_eq!(none_sid, pid_sid);
}
#[cfg(linux_android)]
mod linux_android {
use nix::unistd::gettid;
#[test]
fn test_gettid() {
let tid: ::libc::pid_t = gettid().into();
assert!(tid > 0);
}
}
#[test]
// `getgroups()` and `setgroups()` do not behave as expected on Apple platforms
#[cfg(not(any(
apple_targets,
target_os = "redox",
target_os = "fuchsia",
target_os = "haiku"
)))]
fn test_setgroups() {
// Skip this test when not run as root as `setgroups()` requires root.
skip_if_not_root!("test_setgroups");
let _m = crate::GROUPS_MTX.lock();
// Save the existing groups
let old_groups = getgroups().unwrap();
// Set some new made up groups
let groups = [Gid::from_raw(123), Gid::from_raw(456)];
setgroups(&groups).unwrap();
let new_groups = getgroups().unwrap();
assert_eq!(new_groups, groups);
// Revert back to the old groups
setgroups(&old_groups).unwrap();
}
#[test]
// `getgroups()` and `setgroups()` do not behave as expected on Apple platforms
#[cfg(not(any(
apple_targets,
target_os = "redox",
target_os = "fuchsia",
target_os = "haiku",
solarish
)))]
fn test_initgroups() {
// Skip this test when not run as root as `initgroups()` and `setgroups()`
// require root.
skip_if_not_root!("test_initgroups");
let _m = crate::GROUPS_MTX.lock();
// Save the existing groups
let old_groups = getgroups().unwrap();
// It doesn't matter if the root user is not called "root" or if a user
// called "root" doesn't exist. We are just checking that the extra,
// made-up group, `123`, is set.
// FIXME: Test the other half of initgroups' functionality: whether the
// groups that the user belongs to are also set.
let user = CString::new("root").unwrap();
let group = Gid::from_raw(123);
let group_list = getgrouplist(&user, group).unwrap();
assert!(group_list.contains(&group));
initgroups(&user, group).unwrap();
let new_groups = getgroups().unwrap();
assert_eq!(new_groups, group_list);
// Revert back to the old groups
setgroups(&old_groups).unwrap();
}
#[cfg(not(any(target_os = "fuchsia", target_os = "redox")))]
macro_rules! execve_test_factory (
($test_name:ident, $syscall:ident, $exe: expr $(, $pathname:expr, $flags:expr)*) => (
#[cfg(test)]
mod $test_name {
use std::ffi::CStr;
use super::*;
const EMPTY: &'static [u8] = b"\0";
const DASH_C: &'static [u8] = b"-c\0";
const BIGARG: &'static [u8] = b"echo nix!!! && echo foo=$foo && echo baz=$baz\0";
const FOO: &'static [u8] = b"foo=bar\0";
const BAZ: &'static [u8] = b"baz=quux\0";
fn syscall_cstr_ref() -> Result<std::convert::Infallible, nix::Error> {
$syscall(
$exe,
$(CString::new($pathname).unwrap().as_c_str(), )*
&[CStr::from_bytes_with_nul(EMPTY).unwrap(),
CStr::from_bytes_with_nul(DASH_C).unwrap(),
CStr::from_bytes_with_nul(BIGARG).unwrap()],
&[CStr::from_bytes_with_nul(FOO).unwrap(),
CStr::from_bytes_with_nul(BAZ).unwrap()]
$(, $flags)*)
}
fn syscall_cstring() -> Result<std::convert::Infallible, nix::Error> {
$syscall(
$exe,
$(CString::new($pathname).unwrap().as_c_str(), )*
&[CString::from(CStr::from_bytes_with_nul(EMPTY).unwrap()),
CString::from(CStr::from_bytes_with_nul(DASH_C).unwrap()),
CString::from(CStr::from_bytes_with_nul(BIGARG).unwrap())],
&[CString::from(CStr::from_bytes_with_nul(FOO).unwrap()),
CString::from(CStr::from_bytes_with_nul(BAZ).unwrap())]
$(, $flags)*)
}
fn common_test(syscall: fn() -> Result<std::convert::Infallible, nix::Error>) {
if "execveat" == stringify!($syscall) {
// Though undocumented, Docker's default seccomp profile seems to
skip_if_seccomp!($test_name);
}
let m = crate::FORK_MTX.lock();
// The `exec`d process will write to `writer`, and we'll read that
// data from `reader`.
let (reader, writer) = pipe().unwrap();
// Safe: Child calls `exit`, `dup`, `close` and the provided `exec*` family function.
// NOTE: Technically, this makes the macro unsafe to use because you could pass anything.
// The tests make sure not to do that, though.
match unsafe{fork()}.unwrap() {
Child => {
// Make `writer` be the stdout of the new process.
dup2(writer.as_raw_fd(), 1).unwrap();
let r = syscall();
let _ = std::io::stderr()
.write_all(format!("{:?}", r).as_bytes());
// Should only get here in event of error
unsafe{ _exit(1) };
},
Parent { child } => {
// Wait for the child to exit.
let ws = waitpid(child, None);
drop(m);
assert_eq!(ws, Ok(WaitStatus::Exited(child, 0)));
// Read 1024 bytes.
let mut buf = [0u8; 1024];
read(reader.as_raw_fd(), &mut buf).unwrap();
// It should contain the things we printed using `/bin/sh`.
let string = String::from_utf8_lossy(&buf);
assert!(string.contains("nix!!!"));
assert!(string.contains("foo=bar"));
assert!(string.contains("baz=quux"));
}
}
}
// These tests frequently fail on musl, probably due to
#[cfg_attr(target_env = "musl", ignore)]
#[test]
fn test_cstr_ref() {
common_test(syscall_cstr_ref);
}
// These tests frequently fail on musl, probably due to
#[cfg_attr(target_env = "musl", ignore)]
#[test]
fn test_cstring() {
common_test(syscall_cstring);
}
}
)
);
cfg_if! {
if #[cfg(target_os = "android")] {
execve_test_factory!(test_execve, execve, CString::new("/system/bin/sh").unwrap().as_c_str());
execve_test_factory!(test_fexecve, fexecve, File::open("/system/bin/sh").unwrap().into_raw_fd());
} else if #[cfg(any(freebsdlike, target_os = "linux", target_os = "hurd"))] {
// These tests frequently fail on musl, probably due to
execve_test_factory!(test_execve, execve, CString::new("/bin/sh").unwrap().as_c_str());
execve_test_factory!(test_fexecve, fexecve, File::open("/bin/sh").unwrap().into_raw_fd());
} else if #[cfg(any(solarish, apple_targets, netbsdlike))] {
execve_test_factory!(test_execve, execve, CString::new("/bin/sh").unwrap().as_c_str());
// No fexecve() on ios, macos, NetBSD, OpenBSD.
}
}
#[cfg(any(
target_os = "haiku",
target_os = "hurd",
target_os = "linux",
target_os = "openbsd"
))]
execve_test_factory!(test_execvpe, execvpe, &CString::new("sh").unwrap());
cfg_if! {
if #[cfg(target_os = "android")] {
use nix::fcntl::AtFlags;
execve_test_factory!(test_execveat_empty, execveat,
Some(File::open("/system/bin/sh").unwrap().into_raw_fd()),
"", AtFlags::AT_EMPTY_PATH);
execve_test_factory!(test_execveat_relative, execveat,
Some(File::open("/system/bin/").unwrap().into_raw_fd()),
"./sh", AtFlags::empty());
execve_test_factory!(test_execveat_absolute, execveat,
Some(File::open("/").unwrap().into_raw_fd()),
"/system/bin/sh", AtFlags::empty());
} else if #[cfg(all(target_os = "linux", any(target_arch ="x86_64", target_arch ="x86")))] {
use nix::fcntl::AtFlags;
execve_test_factory!(test_execveat_empty, execveat, Some(File::open("/bin/sh").unwrap().into_raw_fd()),
"", AtFlags::AT_EMPTY_PATH);
execve_test_factory!(test_execveat_relative, execveat, Some(File::open("/bin/").unwrap().into_raw_fd()),
"./sh", AtFlags::empty());
execve_test_factory!(test_execveat_absolute, execveat, Some(File::open("/").unwrap().into_raw_fd()),
"/bin/sh", AtFlags::empty());
}
}
#[test]
#[cfg(not(target_os = "fuchsia"))]
fn test_fchdir() {
// fchdir changes the process's cwd
let _dr = crate::DirRestore::new();
let tmpdir = tempdir().unwrap();
let tmpdir_path = tmpdir.path().canonicalize().unwrap();
let tmpdir_fd = File::open(&tmpdir_path).unwrap().into_raw_fd();
fchdir(tmpdir_fd).expect("assertion failed");
assert_eq!(getcwd().unwrap(), tmpdir_path);
close(tmpdir_fd).expect("assertion failed");
}
#[test]
fn test_getcwd() {
// chdir changes the process's cwd
let _dr = crate::DirRestore::new();
let tmpdir = tempdir().unwrap();
let tmpdir_path = tmpdir.path().canonicalize().unwrap();
chdir(&tmpdir_path).expect("assertion failed");
assert_eq!(getcwd().unwrap(), tmpdir_path);
// make path 500 chars longer so that buffer doubling in getcwd
// kicks in. Note: One path cannot be longer than 255 bytes
// (NAME_MAX) whole path cannot be longer than PATH_MAX (usually
// 4096 on linux, 1024 on macos)
let mut inner_tmp_dir = tmpdir_path;
for _ in 0..5 {
let newdir = "a".repeat(100);
inner_tmp_dir.push(newdir);
mkdir(inner_tmp_dir.as_path(), Mode::S_IRWXU)
.expect("assertion failed");
}
chdir(inner_tmp_dir.as_path()).expect("assertion failed");
assert_eq!(getcwd().unwrap(), inner_tmp_dir.as_path());
}
#[test]
fn test_chown() {
// Testing for anything other than our own UID/GID is hard.
let uid = Some(getuid());
let gid = Some(getgid());
let tempdir = tempdir().unwrap();
let path = tempdir.path().join("file");
{
File::create(&path).unwrap();
}
chown(&path, uid, gid).unwrap();
chown(&path, uid, None).unwrap();
chown(&path, None, gid).unwrap();
fs::remove_file(&path).unwrap();
chown(&path, uid, gid).unwrap_err();
}
#[test]
fn test_fchown() {
// Testing for anything other than our own UID/GID is hard.
let uid = Some(getuid());
let gid = Some(getgid());
let path = tempfile().unwrap();
let fd = path.as_raw_fd();
fchown(fd, uid, gid).unwrap();
fchown(fd, uid, None).unwrap();
fchown(fd, None, gid).unwrap();
fchown(999999999, uid, gid).unwrap_err();
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_fchownat() {
use nix::fcntl::AtFlags;
let _dr = crate::DirRestore::new();
// Testing for anything other than our own UID/GID is hard.
let uid = Some(getuid());
let gid = Some(getgid());
let tempdir = tempdir().unwrap();
let path = tempdir.path().join("file");
{
File::create(&path).unwrap();
}
let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
fchownat(Some(dirfd), "file", uid, gid, AtFlags::empty()).unwrap();
chdir(tempdir.path()).unwrap();
fchownat(None, "file", uid, gid, AtFlags::empty()).unwrap();
fs::remove_file(&path).unwrap();
fchownat(None, "file", uid, gid, AtFlags::empty()).unwrap_err();
}
#[test]
fn test_lseek() {
const CONTENTS: &[u8] = b"abcdef123456";
let mut tmp = tempfile().unwrap();
tmp.write_all(CONTENTS).unwrap();
let offset: off_t = 5;
lseek(tmp.as_raw_fd(), offset, Whence::SeekSet).unwrap();
let mut buf = [0u8; 7];
crate::read_exact(&tmp, &mut buf);
assert_eq!(b"f123456", &buf);
}
#[cfg(linux_android)]
#[test]
fn test_lseek64() {
const CONTENTS: &[u8] = b"abcdef123456";
let mut tmp = tempfile().unwrap();
tmp.write_all(CONTENTS).unwrap();
lseek64(tmp.as_raw_fd(), 5, Whence::SeekSet).unwrap();
let mut buf = [0u8; 7];
crate::read_exact(&tmp, &mut buf);
assert_eq!(b"f123456", &buf);
}
cfg_if! {
if #[cfg(linux_android)] {
macro_rules! require_acct{
() => {
require_capability!("test_acct", CAP_SYS_PACCT);
}
}
} else if #[cfg(target_os = "freebsd")] {
macro_rules! require_acct{
() => {
skip_if_not_root!("test_acct");
skip_if_jailed!("test_acct");
}
}
} else if #[cfg(not(any(target_os = "redox", target_os = "fuchsia", target_os = "haiku")))] {
macro_rules! require_acct{
() => {
skip_if_not_root!("test_acct");
}
}
}
}
#[test]
#[cfg(not(any(
target_os = "redox",
target_os = "fuchsia",
target_os = "haiku"
)))]
fn test_acct() {
use std::process::Command;
use std::{thread, time};
use tempfile::NamedTempFile;
let _m = crate::FORK_MTX.lock();
require_acct!();
let file = NamedTempFile::new().unwrap();
let path = file.path().to_str().unwrap();
acct::enable(path).unwrap();
loop {
Command::new("echo").arg("Hello world").output().unwrap();
let len = fs::metadata(path).unwrap().len();
if len > 0 {
break;
}
thread::sleep(time::Duration::from_millis(10));
}
acct::disable().unwrap();
}
#[cfg_attr(target_os = "hurd", ignore)]
#[test]
fn test_fpathconf_limited() {
let f = tempfile().unwrap();
// PATH_MAX is limited on most platforms, so it makes a good test
let path_max = fpathconf(f, PathconfVar::PATH_MAX);
assert!(
path_max
.expect("fpathconf failed")
.expect("PATH_MAX is unlimited")
> 0
);
}
#[cfg_attr(target_os = "hurd", ignore)]
#[test]
fn test_pathconf_limited() {
// PATH_MAX is limited on most platforms, so it makes a good test
let path_max = pathconf("/", PathconfVar::PATH_MAX);
assert!(
path_max
.expect("pathconf failed")
.expect("PATH_MAX is unlimited")
> 0
);
}
#[cfg_attr(target_os = "hurd", ignore)]
#[test]
fn test_sysconf_limited() {
// OPEN_MAX is limited on most platforms, so it makes a good test
let open_max = sysconf(SysconfVar::OPEN_MAX);
assert!(
open_max
.expect("sysconf failed")
.expect("OPEN_MAX is unlimited")
> 0
);
}
#[cfg(target_os = "freebsd")]
#[test]
fn test_sysconf_unsupported() {
// I know of no sysconf variables that are unsupported everywhere, but
// _XOPEN_CRYPT is unsupported on FreeBSD 11.0, which is one of the platforms
// we test.
let open_max = sysconf(SysconfVar::_XOPEN_CRYPT);
assert!(open_max.expect("sysconf failed").is_none())
}
#[cfg(any(linux_android, freebsdlike, target_os = "openbsd"))]
#[test]
fn test_getresuid() {
let resuids = getresuid().unwrap();
assert_ne!(resuids.real.as_raw(), libc::uid_t::MAX);
assert_ne!(resuids.effective.as_raw(), libc::uid_t::MAX);
assert_ne!(resuids.saved.as_raw(), libc::uid_t::MAX);
}
#[cfg(any(linux_android, freebsdlike, target_os = "openbsd"))]
#[test]
fn test_getresgid() {
let resgids = getresgid().unwrap();
assert_ne!(resgids.real.as_raw(), libc::gid_t::MAX);
assert_ne!(resgids.effective.as_raw(), libc::gid_t::MAX);
assert_ne!(resgids.saved.as_raw(), libc::gid_t::MAX);
}
// Test that we can create a pair of pipes. No need to verify that they pass
// data; that's the domain of the OS, not nix.
#[test]
fn test_pipe() {
let (fd0, fd1) = pipe().unwrap();
let m0 = stat::SFlag::from_bits_truncate(
stat::fstat(fd0.as_raw_fd()).unwrap().st_mode as mode_t,
);
// S_IFIFO means it's a pipe
assert_eq!(m0, SFlag::S_IFIFO);
let m1 = stat::SFlag::from_bits_truncate(
stat::fstat(fd1.as_raw_fd()).unwrap().st_mode as mode_t,
);
assert_eq!(m1, SFlag::S_IFIFO);
}
// pipe2(2) is the same as pipe(2), except it allows setting some flags. Check
// that we can set a flag.
#[cfg(any(
linux_android,
freebsdlike,
solarish,
netbsdlike,
target_os = "emscripten",
target_os = "redox",
))]
#[test]
fn test_pipe2() {
use nix::fcntl::{fcntl, FcntlArg, FdFlag};
let (fd0, fd1) = pipe2(OFlag::O_CLOEXEC).unwrap();
let f0 = FdFlag::from_bits_truncate(
fcntl(fd0.as_raw_fd(), FcntlArg::F_GETFD).unwrap(),
);
assert!(f0.contains(FdFlag::FD_CLOEXEC));
let f1 = FdFlag::from_bits_truncate(
fcntl(fd1.as_raw_fd(), FcntlArg::F_GETFD).unwrap(),
);
assert!(f1.contains(FdFlag::FD_CLOEXEC));
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "fuchsia")))]
fn test_truncate() {
let tempdir = tempdir().unwrap();
let path = tempdir.path().join("file");
{
let mut tmp = File::create(&path).unwrap();
const CONTENTS: &[u8] = b"12345678";
tmp.write_all(CONTENTS).unwrap();
}
truncate(&path, 4).unwrap();
let metadata = fs::metadata(&path).unwrap();
assert_eq!(4, metadata.len());
}
#[test]
fn test_ftruncate() {
let tempdir = tempdir().unwrap();
let path = tempdir.path().join("file");
let mut file = File::create(&path).unwrap();
const CONTENTS: &[u8] = b"12345678";
file.write_all(CONTENTS).unwrap();
ftruncate(&file, 2).unwrap();
drop(file);
let metadata = fs::metadata(&path).unwrap();
assert_eq!(2, metadata.len());
}
// Used in `test_alarm`.
#[cfg(not(target_os = "redox"))]
static mut ALARM_CALLED: bool = false;
// Used in `test_alarm`.
#[cfg(not(target_os = "redox"))]
pub extern "C" fn alarm_signal_handler(raw_signal: libc::c_int) {
assert_eq!(raw_signal, libc::SIGALRM, "unexpected signal: {raw_signal}");
unsafe { ALARM_CALLED = true };
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_alarm() {
use std::{
thread,
time::{Duration, Instant},
};
// Maybe other tests that fork interfere with this one?
let _m = crate::SIGNAL_MTX.lock();
let handler = SigHandler::Handler(alarm_signal_handler);
let signal_action =
SigAction::new(handler, SaFlags::SA_RESTART, SigSet::empty());
let old_handler = unsafe {
sigaction(Signal::SIGALRM, &signal_action)
.expect("unable to set signal handler for alarm")
};
// Set an alarm.
assert_eq!(alarm::set(60), None);
// Overwriting an alarm should return the old alarm.
assert_eq!(alarm::set(1), Some(60));
// We should be woken up after 1 second by the alarm, so we'll sleep for 3
// seconds to be sure.
let starttime = Instant::now();
loop {
thread::sleep(Duration::from_millis(100));
if unsafe { ALARM_CALLED } {
break;
}
if starttime.elapsed() > Duration::from_secs(3) {
panic!("Timeout waiting for SIGALRM");
}
}
// Reset the signal.
unsafe {
sigaction(Signal::SIGALRM, &old_handler)
.expect("unable to set signal handler for alarm");
}
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_canceling_alarm() {
let _m = crate::SIGNAL_MTX.lock();
assert_eq!(alarm::cancel(), None);
assert_eq!(alarm::set(60), None);
assert_eq!(alarm::cancel(), Some(60));
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "haiku")))]
fn test_symlinkat() {
let _m = crate::CWD_LOCK.read();
let tempdir = tempdir().unwrap();
let target = tempdir.path().join("a");
let linkpath = tempdir.path().join("b");
symlinkat(&target, None, &linkpath).unwrap();
assert_eq!(
readlink(&linkpath).unwrap().to_str().unwrap(),
target.to_str().unwrap()
);
let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
let target = "c";
let linkpath = "d";
symlinkat(target, Some(dirfd), linkpath).unwrap();
assert_eq!(
readlink(&tempdir.path().join(linkpath))
.unwrap()
.to_str()
.unwrap(),
target
);
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "haiku")))]
fn test_linkat_file() {
use nix::fcntl::AtFlags;
let tempdir = tempdir().unwrap();
let oldfilename = "foo.txt";
let oldfilepath = tempdir.path().join(oldfilename);
let newfilename = "bar.txt";
let newfilepath = tempdir.path().join(newfilename);
// Create file
File::create(oldfilepath).unwrap();
// Get file descriptor for base directory
let dirfd =
fcntl::open(tempdir.path(), fcntl::OFlag::empty(), stat::Mode::empty())
.unwrap();
// Attempt hard link file at relative path
linkat(
Some(dirfd),
oldfilename,
Some(dirfd),
newfilename,
AtFlags::AT_SYMLINK_FOLLOW,
)
.unwrap();
assert!(newfilepath.exists());
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "haiku")))]
fn test_linkat_olddirfd_none() {
use nix::fcntl::AtFlags;
let _dr = crate::DirRestore::new();
let tempdir_oldfile = tempdir().unwrap();
let oldfilename = "foo.txt";
let oldfilepath = tempdir_oldfile.path().join(oldfilename);
let tempdir_newfile = tempdir().unwrap();
let newfilename = "bar.txt";
let newfilepath = tempdir_newfile.path().join(newfilename);
// Create file
File::create(oldfilepath).unwrap();
// Get file descriptor for base directory of new file
let dirfd = fcntl::open(
tempdir_newfile.path(),
fcntl::OFlag::empty(),
stat::Mode::empty(),
)
.unwrap();
// Attempt hard link file using curent working directory as relative path for old file path
chdir(tempdir_oldfile.path()).unwrap();
linkat(
None,
oldfilename,
Some(dirfd),
newfilename,
AtFlags::AT_SYMLINK_FOLLOW,
)
.unwrap();
assert!(newfilepath.exists());
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "haiku")))]
fn test_linkat_newdirfd_none() {
use nix::fcntl::AtFlags;
let _dr = crate::DirRestore::new();
let tempdir_oldfile = tempdir().unwrap();
let oldfilename = "foo.txt";
let oldfilepath = tempdir_oldfile.path().join(oldfilename);
let tempdir_newfile = tempdir().unwrap();
let newfilename = "bar.txt";
let newfilepath = tempdir_newfile.path().join(newfilename);
// Create file
File::create(oldfilepath).unwrap();
// Get file descriptor for base directory of old file
let dirfd = fcntl::open(
tempdir_oldfile.path(),
fcntl::OFlag::empty(),
stat::Mode::empty(),
)
.unwrap();
// Attempt hard link file using current working directory as relative path for new file path
chdir(tempdir_newfile.path()).unwrap();
linkat(
Some(dirfd),
oldfilename,
None,
newfilename,
AtFlags::AT_SYMLINK_FOLLOW,
)
.unwrap();
assert!(newfilepath.exists());
}
#[test]
#[cfg(not(any(apple_targets, target_os = "redox", target_os = "haiku")))]
fn test_linkat_no_follow_symlink() {
use nix::fcntl::AtFlags;
let _m = crate::CWD_LOCK.read();
let tempdir = tempdir().unwrap();
let oldfilename = "foo.txt";
let oldfilepath = tempdir.path().join(oldfilename);
let symoldfilename = "symfoo.txt";
let symoldfilepath = tempdir.path().join(symoldfilename);
let newfilename = "nofollowsymbar.txt";
let newfilepath = tempdir.path().join(newfilename);
// Create file
File::create(&oldfilepath).unwrap();
// Create symlink to file
symlinkat(&oldfilepath, None, &symoldfilepath).unwrap();
// Get file descriptor for base directory
let dirfd =
fcntl::open(tempdir.path(), fcntl::OFlag::empty(), stat::Mode::empty())
.unwrap();
// Attempt link symlink of file at relative path
linkat(
Some(dirfd),
symoldfilename,
Some(dirfd),
newfilename,
AtFlags::empty(),
)
.unwrap();
// Assert newfile is actually a symlink to oldfile.
assert_eq!(
readlink(&newfilepath).unwrap().to_str().unwrap(),
oldfilepath.to_str().unwrap()
);
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "haiku")))]
fn test_linkat_follow_symlink() {
use nix::fcntl::AtFlags;
let _m = crate::CWD_LOCK.read();
let tempdir = tempdir().unwrap();
let oldfilename = "foo.txt";
let oldfilepath = tempdir.path().join(oldfilename);
let symoldfilename = "symfoo.txt";
let symoldfilepath = tempdir.path().join(symoldfilename);
let newfilename = "nofollowsymbar.txt";
let newfilepath = tempdir.path().join(newfilename);
// Create file
File::create(&oldfilepath).unwrap();
// Create symlink to file
symlinkat(&oldfilepath, None, &symoldfilepath).unwrap();
// Get file descriptor for base directory
let dirfd =
fcntl::open(tempdir.path(), fcntl::OFlag::empty(), stat::Mode::empty())
.unwrap();
// Attempt link target of symlink of file at relative path
linkat(
Some(dirfd),
symoldfilename,
Some(dirfd),
newfilename,
AtFlags::AT_SYMLINK_FOLLOW,
)
.unwrap();
let newfilestat = stat::stat(&newfilepath).unwrap();
// Check the file type of the new link
assert_eq!(
stat::SFlag::from_bits_truncate(newfilestat.st_mode as mode_t)
& SFlag::S_IFMT,
SFlag::S_IFREG
);
// Check the number of hard links to the original file
assert_eq!(newfilestat.st_nlink, 2);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_unlinkat_dir_noremovedir() {
let tempdir = tempdir().unwrap();
let dirname = "foo_dir";
let dirpath = tempdir.path().join(dirname);
// Create dir
DirBuilder::new().recursive(true).create(dirpath).unwrap();
// Get file descriptor for base directory
let dirfd =
fcntl::open(tempdir.path(), fcntl::OFlag::empty(), stat::Mode::empty())
.unwrap();
// Attempt unlink dir at relative path without proper flag
let err_result =
unlinkat(Some(dirfd), dirname, UnlinkatFlags::NoRemoveDir).unwrap_err();
assert!(err_result == Errno::EISDIR || err_result == Errno::EPERM);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_unlinkat_dir_removedir() {
let tempdir = tempdir().unwrap();
let dirname = "foo_dir";
let dirpath = tempdir.path().join(dirname);
// Create dir
DirBuilder::new().recursive(true).create(&dirpath).unwrap();
// Get file descriptor for base directory
let dirfd =
fcntl::open(tempdir.path(), fcntl::OFlag::empty(), stat::Mode::empty())
.unwrap();
// Attempt unlink dir at relative path with proper flag
unlinkat(Some(dirfd), dirname, UnlinkatFlags::RemoveDir).unwrap();
assert!(!dirpath.exists());
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_unlinkat_file() {
let tempdir = tempdir().unwrap();
let filename = "foo.txt";
let filepath = tempdir.path().join(filename);
// Create file
File::create(&filepath).unwrap();
// Get file descriptor for base directory
let dirfd =
fcntl::open(tempdir.path(), fcntl::OFlag::empty(), stat::Mode::empty())
.unwrap();
// Attempt unlink file at relative path
unlinkat(Some(dirfd), filename, UnlinkatFlags::NoRemoveDir).unwrap();
assert!(!filepath.exists());
}
#[test]
fn test_access_not_existing() {
let tempdir = tempdir().unwrap();
let dir = tempdir.path().join("does_not_exist.txt");
assert_eq!(
access(&dir, AccessFlags::F_OK).err().unwrap(),
Errno::ENOENT
);
}
#[test]
fn test_access_file_exists() {
let tempdir = tempdir().unwrap();
let path = tempdir.path().join("does_exist.txt");
let _file = File::create(path.clone()).unwrap();
access(&path, AccessFlags::R_OK | AccessFlags::W_OK)
.expect("assertion failed");
}
#[cfg(not(target_os = "redox"))]
#[test]
fn test_user_into_passwd() {
// get the UID of the "nobody" user
#[cfg(not(target_os = "haiku"))]
let test_username = "nobody";
// "nobody" unavailable on haiku
#[cfg(target_os = "haiku")]
let test_username = "user";
let nobody = User::from_name(test_username).unwrap().unwrap();
let pwd: libc::passwd = nobody.into();
let _: User = (&pwd).into();
}
/// Tests setting the filesystem UID with `setfsuid`.
#[cfg(linux_android)]
#[test]
fn test_setfsuid() {
use std::os::unix::fs::PermissionsExt;
use std::{fs, io, thread};
require_capability!("test_setfsuid", CAP_SETUID);
// get the UID of the "nobody" user
let nobody = User::from_name("nobody").unwrap().unwrap();
// create a temporary file with permissions '-rw-r-----'
let file = tempfile::NamedTempFile::new_in("/var/tmp").unwrap();
let temp_path = file.into_temp_path();
let temp_path_2 = temp_path.to_path_buf();
let mut permissions = fs::metadata(&temp_path).unwrap().permissions();
permissions.set_mode(0o640);
// spawn a new thread where to test setfsuid
thread::spawn(move || {
// set filesystem UID
let fuid = setfsuid(nobody.uid);
// trying to open the temporary file should fail with EACCES
let res = fs::File::open(&temp_path);
let err = res.expect_err("assertion failed");
assert_eq!(err.kind(), io::ErrorKind::PermissionDenied);
// assert fuid actually changes
let prev_fuid = setfsuid(Uid::from_raw(-1i32 as u32));
assert_ne!(prev_fuid, fuid);
})
.join()
.unwrap();
// open the temporary file with the current thread filesystem UID
fs::File::open(temp_path_2).unwrap();
}
#[test]
#[cfg(not(any(
target_os = "redox",
target_os = "fuchsia",
target_os = "haiku"
)))]
fn test_ttyname() {
let fd = posix_openpt(OFlag::O_RDWR).expect("posix_openpt failed");
assert!(fd.as_raw_fd() > 0);
// on linux, we can just call ttyname on the pty master directly, but
// apparently osx requires that ttyname is called on a slave pty (can't
// find this documented anywhere, but it seems to empirically be the case)
grantpt(&fd).expect("grantpt failed");
unlockpt(&fd).expect("unlockpt failed");
let sname = unsafe { ptsname(&fd) }.expect("ptsname failed");
let fds = fs::OpenOptions::new()
.read(true)
.write(true)
.open(Path::new(&sname))
.expect("open failed");
let name = ttyname(fds).expect("ttyname failed");
assert!(name.starts_with("/dev"));
}
#[test]
#[cfg(not(any(target_os = "redox", target_os = "fuchsia")))]
fn test_ttyname_not_pty() {
let fd = File::open("/dev/zero").unwrap();
assert_eq!(ttyname(fd), Err(Errno::ENOTTY));
}
#[test]
#[cfg(bsd)]
fn test_getpeereid() {
use std::os::unix::net::UnixStream;
let (sock_a, sock_b) = UnixStream::pair().unwrap();
let (uid_a, gid_a) = getpeereid(sock_a).unwrap();
let (uid_b, gid_b) = getpeereid(sock_b).unwrap();
let uid = geteuid();
let gid = getegid();
assert_eq!(uid, uid_a);
assert_eq!(gid, gid_a);
assert_eq!(uid_a, uid_b);
assert_eq!(gid_a, gid_b);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_faccessat_none_not_existing() {
use nix::fcntl::AtFlags;
let tempdir = tempfile::tempdir().unwrap();
let dir = tempdir.path().join("does_not_exist.txt");
assert_eq!(
faccessat(None, &dir, AccessFlags::F_OK, AtFlags::empty())
.err()
.unwrap(),
Errno::ENOENT
);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_faccessat_not_existing() {
use nix::fcntl::AtFlags;
let tempdir = tempfile::tempdir().unwrap();
let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
let not_exist_file = "does_not_exist.txt";
assert_eq!(
faccessat(
Some(dirfd),
not_exist_file,
AccessFlags::F_OK,
AtFlags::empty(),
)
.err()
.unwrap(),
Errno::ENOENT
);
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_faccessat_none_file_exists() {
use nix::fcntl::AtFlags;
let tempdir = tempfile::tempdir().unwrap();
let path = tempdir.path().join("does_exist.txt");
let _file = File::create(path.clone()).unwrap();
assert!(faccessat(
None,
&path,
AccessFlags::R_OK | AccessFlags::W_OK,
AtFlags::empty(),
)
.is_ok());
}
#[test]
#[cfg(not(target_os = "redox"))]
fn test_faccessat_file_exists() {
use nix::fcntl::AtFlags;
let tempdir = tempfile::tempdir().unwrap();
let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
let exist_file = "does_exist.txt";
let path = tempdir.path().join(exist_file);
let _file = File::create(path.clone()).unwrap();
assert!(faccessat(
Some(dirfd),
&path,
AccessFlags::R_OK | AccessFlags::W_OK,
AtFlags::empty(),
)
.is_ok());
}
#[test]
#[cfg(any(all(target_os = "linux", not(target_env = "uclibc")), freebsdlike))]
fn test_eaccess_not_existing() {
let tempdir = tempdir().unwrap();
let dir = tempdir.path().join("does_not_exist.txt");
assert_eq!(
eaccess(&dir, AccessFlags::F_OK).err().unwrap(),
Errno::ENOENT
);
}
#[test]
#[cfg(any(all(target_os = "linux", not(target_env = "uclibc")), freebsdlike))]
fn test_eaccess_file_exists() {
let tempdir = tempdir().unwrap();
let path = tempdir.path().join("does_exist.txt");
let _file = File::create(path.clone()).unwrap();
eaccess(&path, AccessFlags::R_OK | AccessFlags::W_OK)
.expect("assertion failed");
}
#[test]
#[cfg(bsd)]
fn test_group_from() {
let group = Group::from_name("wheel").unwrap().unwrap();
assert!(group.name == "wheel");
let group_id = group.gid;
let group = Group::from_gid(group_id).unwrap().unwrap();
assert_eq!(group.gid, group_id);
assert_eq!(group.name, "wheel");
}